Evaluation Board User Guide
Contents
1. ININ gen tf MOTIZA an V suv lt 3osou 2 A Av I pi rss 5 5 tu o 2 anto anto va DAYA9S ESOBIDLAI 122 ozo EN OOOO NIBHSNd V V QGEA E OGAO ZZZZZZZOO TMS 555555522 OOEAE aaaot ve Istjadzad oo F E S tetlaveaa 13534 ama I rjaasad dO 3 vAN o en ztla vad AA Stv 2 lt sc e s 5 Sv ttlaveaa Mrs ms pa vs 6u o ag ot a 4 zad sa vr Iela4 tad 1nO1vix 8 a4 00d K SET Gac e aa o data EE al JO 4 SAd vlas vad DOVTIYZILI Xsaveaxa n MONIA Bn NO UM 860 7 lielauesd DE T712 G e 04 29d VOTO LUH 103091988 a53eTo suv lt de eqs SPESE pz iis Sv tasaa 8 cua su a 2 pe 0194 1094 UMIS TADS za OYIS OADA Gene Y bn ag 4 S21s a9viu zva AOI 54 ONSE ISAT GENE V Ze Lia voad sva vas ER IRON ia Oudvodld rvd Os ci WE V d em been PEE on 99 i Da gunge 435855 ro 2000022 IA ed EE doo gt 0555506 anto anto o L E ot was ara r ecu Ed ge su aaeat lt p 4 4 anto antol extuaH La E EEN OTIIVOCELANMI y po E E 103084U0 SE vas ano Le ze e A Kee EE 3ds zv anro Jaaa y HOw IE H dm tv 4 Lg 29 ov 65 11355 ecu en aano ASNTATONS LOS SOL1Z 4 TO AUOT ioqdeduog2. Note that when the power supply of the SSM2380 is interrupted you must reset the SSM2380 software to synchronize with the device Simply click the red RESET button at the bottom left corner of the software window see Figure 9 INPUT CONTROL This section controls the left and right gain control operation of SSM2380 Input Control 09686 009 Figure 10 Input Control Section of SSM2380 GUI Left Gain Control Register RO This is associated with Control Register RO Options include mute left to right gain loading load left gain to right channel and left channel gain The left channel gain can be set from 1 dB to 24 dB in 0 5 dB increments Right Gain Control Register R1 This is associated with Control Register R1 Options include mute right to left gain loading load right gain to left channel and right channel gain The right channel gain can be set from 1 dB to 24 dB in 0 5 dB increments OUTPUT CONTROL This section controls the auto level control ALC of the SSM2380 Output Control 101 128ms step default v O e w 1011 90 3 3 89 default v 09686 010 Figure 11 Output Control Section of SSM2380 GUI ALC Control 1 Register R3 This is associated with Control Register R3 This section allows the user to control the release time and attack time of the SSM2380 ALC Control 2 Register R4 This is associated with Control Register R4 This section allows the user to enable
3. C24 C25 Ceramic capacitor 0 22 uF 16 V X7R 0805 Panasonic ECG ECJ 2VB1C224K 8 2 C27 C28 Ceramic capacitor 0 10 uF 25 V X5R 0603 Taiyo Yuden TMK107BJ104KA T 9 8 C29 C30 C31 C32 Ceramic capacitor 510 pF 50 V 596 COG 0603 Murata Electronics GRM1885C1H511JA01D C33 C34 C35 C36 10 1 D1 LED MINISMD red 7 5 MCD GAASP GAP Vishay Semiconductors TLMS2100 GS08 11 2 D2 D4 LED MINISMD yellow 7 5 MCD GAASP GAP Vishay Semiconductors TLMY2100 GS08 12 2 D3 D5 LED blue 471 NM clear SMD OSRAM Opto LB M673 L1M2 35 Z Semiconductors 13 8 JP1 H1 JP2 JP3 JP4 Connector header breakaway 0 100 03POS STR Tyco Electronics 4 103747 0 03 JP9 JP10 JP11 14 3 H2 JP5 JP6 Connector header breakaway 0 100 04POS STR Tyco Electronics 4 103747 0 04 15 7 H3 H4 H5 H6 JP7 Connector header breakaway 0 100 02POS STR Tyco Electronics 4 103747 0 02 H7 JP8 16 1 J1 Connector mini USB RCPT RA Type B SMD Tyco Electronics 1734035 2 17 1 J2 Connector jack stereo RA 3 pin 3 5 mm CUI Inc SJ1 3523N 18 4 L1 L2 L3 L4 0 47 uH 1 4A 80 MQ 3 2 mm x 1 6 mm Murata Electronics LQM31PNR47M00 19 1 Q1 Transistor PNP 120 V 2000 mA SOT 223 Diodes Zetex FZT705TA 20 1 Q2 Transistor GP NPN AMP SOT 23 Fairchild MMBT3904 Semiconductor 21 2 R1 R10 Resistor 100 kO 7s W 196 0805 SMD Panasonic ECG ERJ 6ENF 1003V 22 1 R2 Resistor 2 00 kO Ys W 1 0805 SMD Yageo RC0805FR 072KL 23 5 R3 R8 R9 R11 R25 Resistor 475 O 7s W 1
4. 010001 9 5 30 0 010000 9 0 31 3 001111 8 5 32 6 001110 8 0 34 0 001101 7 5 35 3 001100 7 0 36 7 001011 6 5 38 1 001010 6 0 39 6 001001 5 5 41 1 001000 5 0 42 6 000111 4 5 44 1 000110 4 0 45 6 000101 3 5 47 1 000100 3 0 48 7 Rev 0 Page 12 of 20 OUTPUT FERRITE BEADS B1 TO B4 The output beads B1 to B4 are suggested components for filtering out the EMI caused at the switching output nodes The penalty for using ferrite beads for EMI filtering is slightly worse noise and distortion performance at the system level due to the nonlinearity of the beads Ensure that these beads have enough current conducting capability while providing sufficient EMI attenuation The current rating needed for an 8 Q load is approx imately 420 mA and impedance at 100 MHz must be 2120 In addition the lower the dc resistance DCR of these beads the better for minimizing their power consumption Table 4 describes suggested beads OUTPUT SHUNTING CAPACITORS C29 TO C32 There are four output shunting capacitors C29 to C32 that work with the B1 to B4 ferrite beads or with the L1 to L4 inductors if they are used Use small size 0603 or 0402 Table 4 Suggested Output Beads multilayer ceramic capacitors that are made of X7R or COG NPO materials Note that the capacitors can be used in pairs a capacitor with small capacitance up to 100 pF plus a capacitor with a larger capacitance less than 1 nF This configuration provides
5. ALC operation to set the compressor opera tion mode light to heavy compression and limiting to set the limiter level and to set the limiter mode There are two limiter modes fixed power and supply tracking Fixed power mode sets the output limiter level to a fixed value independent of the power supply rail Supply tracking mode sets the limiter as a percentage of SPKVDD Note that if the user intends to change the gain setting registers RO or RI the user must toggle the ALC Enable check box to allow the new gain settings to take effect Rev 0 Page 8 of 20 AUXILIARY FUNCTIONS This section allows user access to the power management control registers current thermal fault recovery mixing operation and edge rate control 09686 011 Figure 12 Auxiliary Function Section of SSM2380 GUI Shutdown Register R5 To enable the SSM2380 simply click ON for left and or right channels Mode Control Register R2 The Mode Control Register R2 section which is associated with Control Register R2 contains a collection of unrelated settings including current and thermal fault recovery mixers and emissions control modes Current Thermal Fault Recovery The Overcurrent Autorecovery and Overtemperature Autorecovery check boxes control the autorecovery feature of the fault detection mode When selected the autorecovery feature is active When cleared the device stays in fault protection mode until the reset register
6. Mode ai VA RET tes 5 Evaluation Board Software Quick Start Procedures 6 SSM2380 Control Software Setup 6 REVISION HISTORY 9 11 Revision 0 Initial Version Initial SSM2380 Hardware Setup 6 SSM2380 GUI Functional Blocks sss 8 Input Control ettet tbe 8 Output Control ce ote ERI 8 Auxiliary FUNCION Sui 9 Quick Set Buttons 10 Direct PC Register Access 10 UE 10 ELO ee 11 General Description iii eee 11 USB c oerte tete tetur 11 Power Rel e pete eps 11 Cypress USB Interface Crystal Oscillator we 11 Passive Component Selection eee 12 Input Coupling Capacitor Selection C22 to C25 12 Output Ferrite Beads B1 to BA 13 Output Shunting Capacitors C29 to C32 sss 13 Output Inductors L1 to L i 13 Evaluation Board Schematics and Artwork 14 Ordering Information iii iene 18 Bill Of Materials sss tip eR E Reps 18 Rev 0 Page 2 of 20 EVALUATION BOARD HARDWARE The SSM2380 evaluation board provides all of the support circuitry required to operate the SSM2380 amplifier including a computer interface for the DC bus Figure 2 shows the typical bench characterization setup used to evaluate the audio perfor mance of the SSM2380 See the Evaluation Board Software Quick Start Procedures section to get started EXTERNAL GC D ANALOG 1
7. SSM2380 3 Connect JP4 in the 3 3 V location as shown in the blue circled area of Figure 4 The purpose of this is to power the Cypress USB controller to establish communication between the software and the board 4 Make sure the software was closed Connect the SSM2380 evaluation board to the PC via the USB cable 5 The PC recognizes the new hardware When the hardware is recognized a prompt asks to let Windows find the proper drivers for the hardware Do not let Windows install the drivers 6 The user must direct the driver installation to the following path by clicking the Browse tab C Program Files Analog Devices Inc SSM2380 7 After the path has been properly selected the user can continue with the driver installation process Windows will properly establish the link between the Cypress USB controller and the PC After the previous steps are followed the user can now run the SSM2380 control software The software is located at the following path C Program Files Analog Devices Inc SSM2380 SSM2380 exe 9 For quick access to this software the installer creates a shortcut from the SSM2380 exe file to the desktop 10 Ifall steps were properly followed at the top of the SSM2380 software window a status message of USBi Connected appears If the installation was not successful a message of USBi Cannot Find Device appears 11 After a successful installation the SSM2380 software recognizes a connection from the PC t
8. of Goods shall not apply to this Agreement and is expressly disclaimed 2011 Analog Devices Inc All rights reserved Trademarks and ANALOG registered trademarks are the property of their respective owners UG09686 0 9 11 0 DEVICES www analo g com Rev 0 Page 20 of 20
9. subjected to high energy ESD Therefore proper ESD precautions should be taken to avoid performance degradation or loss of functionality Legal Terms and Conditions By using the evaluation board discussed herein together with any tools components documentation or support materials the Evaluation Board you are agreeing to be bound by the terms and conditions set forth below Agreement unless you have purchased the Evaluation Board in which case the Analog Devices Standard Terms and Conditions of Sale shall govern Do not use the Evaluation Board until you have read and agreed to the Agreement Your use of the Evaluation Board shall signify your acceptance of the Agreement This Agreement is made by and between you Customer and Analog Devices Inc ADI with its principal place of business at One Technology Way Norwood MA 02062 USA Subject to the terms and conditions of the Agreement ADI hereby grants to Customer a free limited personal temporary non exclusive non sublicensable non transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY Customer understands and agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above and agrees not to use the Evaluation Board for any other purpose Furthermore the license granted is expressly made subject to the following additional limitations Customer shall not i rent lease display sell transfer assign sublic
10. varies with amplifier gain value from 7 3 kQ to 55 KQ over the entire gain range of the SSM2380 this calculation must be performed carefully to ensure that the low frequency performance is acceptable at all gain levels The relationship between gain and input resistance is shown in Table 3 As an example calculation suppose that the low frequency cutoff is to be no higher than 200 Hz and that the amplifier gain varies between 6 dB and 18 dB In this case the input resistance is between 39 6 kO and 13 6 kQ Because the cutoff frequency is highest when the input resistance is small the calculation should be done using the minimum value in this case giving a minimum capacitance of approximately 59 nF A larger standard value perhaps 100 nF should be used to account for the ordinary variation due to tolerance temperature coefficient and so on Table 3 Input Impedance for IC Control Mode LGAIN 5 0 RGAIN 5 0 Gain dB Rin kQ 101110 24 0 7 3 101101 23 5 7 7 101100 23 0 8 1 101011 22 5 8 5 101010 22 0 9 0 101001 21 5 9 5 101000 21 0 10 0 100111 20 5 10 5 100110 20 0 11 1 100101 19 5 11 7 100100 19 0 12 3 100011 18 5 12 9 100010 18 0 13 6 100001 17 5 14 3 100000 17 0 15 0 011111 16 5 15 8 011110 16 0 16 6 011101 15 5 17 4 011100 15 0 18 3 011011 14 5 19 2 011010 14 0 20 1 011001 13 5 21 1 011000 13 0 22 1 010111 12 5 23 1 010110 12 0 24 2 010101 11 5 25 3 010100 11 0 26 4 010011 10 5 27 6 010010 10 0 28 8
11. write transfers and acts as a FIFO to route data between the host PC and the target device CRYSTAL OSCILLATOR The Cypress USB interface is its own clock master and the board includes a crystal oscillator circuit with a 24 MHz crystal resonator to provide stability to the oscillator circuit The crystal resonator is driven by the XTALOUT and XTALIN pins of the Cypress USB interface Rev 0 Page 11 of 20 UG 248 PASSIVE COMPONENT SELECTION Although the evaluation board is preloaded with the passive components required for a basic configuration the user may wish to evaluate the same circuit with different component values or filter designs Selecting the proper components is the key to achieving the performance required at the budgeted cost INPUT COUPLING CAPACITOR SELECTION C22 TO C25 The input coupling capacitors C22 to C25 should be large enough to couple the low frequency signal components in the incoming signal and small enough to filter out unnecessary low frequency signals For music signals the cutoff frequency chosen is often between 20 Hz and 30 Hz to preserve the low frequency components of the signal for applications with small speakers a higher cutoff frequency is often chosen to reduce the power wasted on audio that cannot be reproduced by the speaker The value of each input capacitor is calculated by C 1 2rRmfc where Rw is the amplifier input resistance fcis the cutoff frequency Because Rn
12. 006 Figure 6 Jumper Connections for ALC Mode Operation The limiting percentage of the ALC feature is determined by the value of an external resistor R24 which should be placed on the secondary side of the board The resistor value can be calculated using the curve shown in Figure 7 95 90 5 85 x E 80 a ul 75 V NY 70 A o s gt 65 E a E 60 O gg TYPICAL CONDITION INTERNAL RESISTOR 20 SM so INTERNAL RESISTOR 20 SS 45 5 100 1k 10k 100k im RESISTOR 0 8 Figure 7 Output Voltage Limit Vrn vs Rra GAIN SELECT MODE The proper connections for gain select mode are shown in Figure 8 A jumper must be inserted on JP11 from center pin to top pin JP9 and JP10 allow the user to select the SSM2380 gain from 6 dB to 24 dB To connect the appropriate gain select pin to VDD place a jumper from the center pin to the top pin of the header To select GND simply move the jumper connec tion to the center pin and bottom pin of the header A gain select table shows all possible settings in Table 2 All other features ALC emissions control and mixer are deactivated while the SSM2380 is in gain select mode 09686 008 Figure 8 Jumper Connections for Gain Select Mode Operation Table 2 Gain Select Mode Settings for JP9 and JP10 GAIN1 JP9 GAINO JP10 Gain Setting GND GN
13. 0805 SMD Panasonic ECG ERJ 6ENF4750V 24 2 R4 R5 Resistor 10 0 kQ Ys W 1 0805 SMD Yageo RC0805FR 0710KL 25 4 R6 R7 R20 R215 Resistor 4 99 kQ Ys W 1 0805 SMD Yageo RCO805FR 074K99L 26 8 R14 R15 R16 R17 Resistor 0 0 Q W 0805 SMD Panasonic ECG ERJ 6GEYOROOV R18 R19 R22 R23 27 1 R24 Resistor 4 99 kQ Ys W 1 0805 SMD Yageo RCO805FR 074K99L 28 1 SW1 Switch TACT SMD W O GND 160 g Omron Electronics Inc B3SN 3012P 29 1 U1 IC REG LDO 150 mA 3 3 V TSOT 23 5 Analog Devices Inc ADP1711AUJZ 3 3 R7 30 1 U2 IC REG LDO 150 mA 1 8 V TSOT 23 5 Analog Devices Inc ADP1711AUJZ 1 8 R7 31 1 U3 IC EEPROM 256 Kb 400 kHz 8 TSSOP Microchip Technology 24AA256 1 ST 32 1 U4 IC MCU MOBL USB 56 VFBGA Cypress CY7C68053 56BAXIT Semiconductor 36 3 U5 U6 U7 Translator 1 bit unidirect SC70 5 Fairchild FXLP34P5X Semiconductor 37 1 U8 Class D audio amplifier with ALC I C Analog Devices Inc SSM2380CBZ 38 1 YI Crystal 24 000 MHz 20 pF 49 us ECS Inc ECS 240 20 4X B1 to B4 use 0 O links C28 is not populated 3 C29 to C36 are not populated L1 to L4 are not populated 5R18 to R21 are not populated Rev 0 Page 18 of 20 NOTES Rev 0 Page 19 of 20 NOTES ESD Caution A ESD electrostatic discharge sensitive device Charged devices and circuit boards can discharge without detection Although this product features patented or proprietary protection Aviad circuitry damage may occur on devices
14. 1 DEVICES 1 8 STEREO TO LOAD 2 5V TO 5 5V INPUT OR Idi DIFERENTIAL AUDIO INPUT Fe N oo TO ANALYZER TO PC Figure 2 Diagram View of Evaluation Board Connections POWER SUPPLIES The SSM2380 requires an external dc power supply A 2 pin 0 100 male header H3 is provided on the evaluation board Supply voltages between 2 5 V and 5 5 V are accepted and supply currents may exceed 1 A under some conditions Alternatively 5 V USB power supply can be used to power the chip although the USB 2 0 specification only allows current draw up to 500 mA Be cautious when using the USB port to supply any significant amount of power The jumper configuration used for USB power is shown in Figure 3 Be sure to remove JP7 when using an external power supply as this will short the DC voltage to the external supply Conversely be sure to remove the external supply from H3 when using USB power 09686 003 Figure 3 Connecting USB Power Supply to SSM2380 09686 002 UG 248 INPUT SIGNALS On the left side of the PCB are two 4 pin headers JP5 and JP6 These are used to connect the input audio signal to the amplifier If the input audio signal is differential use the two center pins of JP5 INL and INL for left channel audio and the two center pins of JP6 INR and INR for the right channel audio In this case connect either the top or the bottom pin to the source signal ground For single ended audio inputs only two p
15. 15 of 20 E 0 0 e e 0 e 0 0 o e 0 e 0 ec 0 0 e o 0 e GC sc se Ss 0 S se se e e 0 es 0 0 0 6 e e o ooo e cs 6 0 0 0 0 0 0 0 0 oo 0 0 00 ee 9 9 9 e e e e e 9 sc s e e oe ee oa 0 0 e e 0 e e a a a se s e 0 0 e s ce s a se s a oe e 0 a e S oso a 6 e a 6 es ee Figure 20 Evaluation Board Layout Ground Plane Layer 2 Rev 0 Page 16 of 20 09686 015 09686 016 Figure 21 Evaluation Board Layout Power Plane Layer 3 e 0 9 e o e e 9 0 6 6 e o eee e 0 9 o s 6 o e e e o e 0 S so a a oe Figure 22 Evaluation Board Layout Secondary Side Layer 4 Rev 0 Page 17 of 20 09686 017 09686 018 ORDERING INFORMATION BILL OF MATERIALS Table 6 Reference Item Qty Designator Description Manufacturer Part Number 1 4 B1 B2 B3 B4 Ferrite chip 220 Q 2A 0603 TDK Corporation MPZ16085221A 2 5 C1 C2 C4 C5 C19 Ceramic capacitor 1 0 uF 10 V X7R 0805 Kemet C0805C105K8RACTU 3 5 C3 C6 C10 C11 C26 Ceramic capacitor 10 uF 10 V 10 X5R 0805 Murata Electronics GRM21BR61A106KE19L 4 2 C7 C8 Ceramic capacitor 0 01 pF 1096 50 V X7R 0603 AVX Corporation 06035C103KAT2A 5 8 C9 C12 C13 C14 Ceramic capacitor 0 10 uF 25 V X5R 0603 Taiyo Yuden TMK107BJ104KA T C15 C16 C20 C21 6 2 C17 C18 Ceramic capacitor 22 pF 50 V 0603 SMD Panasonic ECG ECJ 1VC1H220J 7 4 C22 C23
16. ANALOG DEVICES Evaluation Board User Guide UG 248 One Technology Way P O Box 9106 Norwood MA 02062 9106 U S A Tel 781 329 4700 Fax 781 461 3113 www analog com Evaluating the SSM2380 Audio Amplifier FEATURES Accepts either differential or single ended inputs Full featured evaluation board for the SSM2380 PCB footprint for optional EMI filter Includes USB hardware interface for plug and play operation Microsoft Windows based evaluation software with simple graphical user interface EQUIPMENT NEEDED Audio source with Ys male stereo plug or 0 100 header Power supply 5 0 V 2 0 A recommended EVAL SSM2380Z evaluation board PC running Windows XP or later USB 2 0 port required Stereo speakers or other load DOCUMENTS NEEDED SSM2380 data sheet SOFTWARE NEEDED SSM2380 evaluation software GENERAL DESCRIPTION The SSM2380 evaluation board is a complete solution for driving two loudspeakers It includes the SSM2380 amplifier IC and the additional components needed to connect the C bus to a personal computer using a universal serial bus USB connection Figure 1 shows the evaluation board in a simple configuration with USB and power and audio input connections The SSM2380 features an DC interface with many useful settings Using the DC control interface the gain of the SSM2380 can be selected from any of 47 values between 1 dB and 24 dB Other features available when using the DC interface inc
17. D 6dB GND VDD 12dB VDD GND 18 dB VDD VDD 24 dB Rev 0 Page 5 of 20 EVALUATION BOARD SOFTWARE QUICK START D SSM2380 CONTROL SOFTWARE SETUP Do not connect the evaluation board until software is installed The SSM2380 software interface requires Microsoft NET Framework Version 2 0 or later The installer automatically downloads it if NET Version 2 0 is not already installed To install the control software use the following steps 1 Goto www analog com SSM2380 2 Click Evaluation Boards amp Kits 3 Choose the appropriate Windows version 32 bit or 64 bit to download 4 Extract the SSM2380 zipped installation file to a convenient location and double click setup exe to begin the installation process Follow the installation instructions when prompted 5 The software and USB drivers are installed in C Program Files Analog Devices Inc SSM2380 SSM2380 USB Driver Installation Before connecting the SSM2380 evaluation board to a PC or notebook the following procedure may need to be completed This procedure only needs to be executed once on each com puter that uses the SSM2380 software This procedure can be skipped if the user has previously installed any SigmaStudio or USBi related drivers from Analog Devices Inc 1 Exit the SSM2380 user interface software 2 Remove jumpers from JP1 JP2 and JP3 located at the top of the evaluation board to completely isolate the Cypress USB driver from the
18. EREUNDER IS PROVIDED AS IS AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS ENDORSEMENTS GUARANTEES OR WARRANTIES EXPRESS OR IMPLIED RELATED TO THE EVALUATION BOARD INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTY OF MERCHANTABILITY TITLE FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER S POSSESSION OR USE OF THE EVALUATION BOARD INCLUDING BUT NOT LIMITED TO LOST PROFITS DELAY COSTS LABOR COSTS OR LOSS OF GOODWILL ADI S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS 100 00 EXPORT Customer agrees that it will not directly or indirectly export the Evaluation Board to another country and that it will comply with all applicable United States federal laws and regulations relating to exports GOVERNING LAW This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts excluding conflict of law rules Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County Massachusetts and Customer hereby submits to the personal jurisdiction and venue of such courts The United Nations Convention on Contracts for the International Sale
19. R8 is written to zero or the device loses power Mixer Modes When R to L Signal Mix is selected the right input signal is mixed to both right and left outputs When L to R Signal Mix is selected the left input signal is mixed to both left and right outputs Edge Speed Several different emission control mode levels can be set The slowest setting yields the best emission suppression but it may degrade SNR and efficiency measurements slightly Error Register R6 This section is associated with Control Register R6 Each block is a read only indicator that is activated when a particular fault condition is encountered It does not update unless the R6 Read button is clicked as detailed in the Direct DC Register Access section This feature is only active if the fault recovery options overcurrent autorecovery and overtemperature autorecovery are enabled Rev 0 Page 9 of 20 QUICK SET BUTTONS The GUI includes a collection of buttons to switch quickly to several predefined configurations See Figure 13 and the following three sections for details Quick Set Operation qu ru uf H 9 E d 3 09686 012 Figure 13 Preset Button Section of SSM2380 GUI RESET RESET first initializes the SSM2380 by writing all 0s to Control Register R8 It then clears all previously stored read write windows and ensures that all registers are set to the proper default value The RESET button shoul
20. You can also check the register contents by Figure 15 USB Power Control clicking the Read button The register contents are displayed in the text box next to each button Hr 09686 013 Register Text Figure 14 PC Register Direct Control of SSM2380 GUI USB POWER The 5 V power switch described in the USB Power Switch section is activated by clicking 5V USB Power ON as shown in Figure 15 09686 021 Rev 0 Page 10 of 20 USB I C INTERFACE GENERAL DESCRIPTION The EVAL ADUSB2EBZ also known as the USBi is a standa lone communications interface adapter and programmer used in the evaluation of SigmaDSP systems It translates USB control commands from SigmaStudio to the DC and SPI communications protocols To simplify bench evaluation an interface based on the USBi adapter is included on the SSM2380 evaluation board This eliminates the need for a separate interface board and 10 pin ribbon cable only a USB mini B cable is required This interface is shown in Figure 16 09686 014 Figure 16 USB to PC Microcontroller and USB interface The on board regulators enable both 1 8 V and 3 3 V IOVDD operation allowing for increased testing flexibility The USBi interface can also control SigmaDSP systems in real time via SigmaStudio and it is capable of programming an EEPROM in self boot systems It is an ideal solution for in circuit programming and tuning of prototype systems The USBi only supports USB 2 0 inte
21. aving any other EEPROMs in your system design at this address This EEPROM is not write protected therefore an attempt to write to Address 0x51 overwrites the USBi s on board EEPROM and the USBi will cease to function The USBi cannot be reprogrammed without returning it to Analog Devices USB POWER SWITCH The SSM2380 evaluation board is capable of taking 5 V power from the USB port after the Cypress USB microcontroller has finished its boot up process The USB_PWR_ON signal which can be set in the SSM2380 software appears on one pin of the Cypress microcontroller This signal controls Q1 and Q2 create a connection between USB power and the supply rail D5 a blue LED lights up when this supply is activated Note that the current available from the USB bus is limited therefore the amplifier power stage may not drive low impedance loads properly DC SOURCE JUMPERS If an external DC source is to be used place the JP1 JP2 and JP3 jumpers such that they connect the device DC lines to the external DC lines Otherwise they should connect the device PC lines to the on board PC lines as shown in the red rectangular area of Figure 4 If an external DC is used an external I C source can be attached to H2 following the silkscreen labels displayed on the board The voltage of the external DC interface should match the value set on JP4 the two voltages are taken from two separate on board regulators The on board DC interface work
22. d be clicked every time power is disrupted from the SSM2380 to synchronize the SSM2380 to the control software DEM 2 a TENE 2 2 Music Optimized By clicking the Music Optimized preset button the following A occurs e Lett and right channels are enabled e Gain for both left and right channels is set to 18 dB e The ALC operation is enabled and tuned for optimized sound quality for music playback A slower attack time is used along with heavier compression and a slower release time 3 2 S 3 gt 3 a i Voice Optimized By clicking the Voice Optimized preset button the following Occurs z S amp d E e Leftand right channels are enabled e Gain for both left and right channels is set to 18 dB e The ALC operation is enabled and tuned for optimized SPL level for voice playback A faster attack time is used a small amount of compression before limiter operation and a faster release time DIRECT PC REGISTER ACCESS Within each subsection is direct access to the associated DC control register Ifthe user desires data can be directly written to the control register by typing the register data byte in hexa decimal format Simply type the desired word in hexadecimal format in the desired register write window Click the Write button when ready to send this data to the SSM2380 The associated subsection options from the main GUI section are also updated
23. ense or distribute the Evaluation Board and ii permit any Third Party to access the Evaluation Board As used herein the term Third Party includes any entity other than ADI Customer their employees affiliates and in house consultants The Evaluation Board is NOT sold to Customer all rights not expressly granted herein including ownership of the Evaluation Board are reserved by ADI CONFIDENTIALITY This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason Upon discontinuation of use of the Evaluation Board or termination of this Agreement Customer agrees to promptly return the Evaluation Board to ADI ADDITIONAL RESTRICTIONS Customer may not disassemble decompile or reverse engineer chips on the Evaluation Board Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board including but not limited to soldering or any other activity that affects the material content of the Evaluation Board Modifications to the Evaluation Board must comply with applicable law including but not limited to the RoHS Directive TERMINATION ADI may terminate this Agreement at any time upon giving written notice to Customer Customer agrees to return to ADI the Evaluation Board at that time LIMITATION OF LIABILITY THE EVALUATION BOARD PROVIDED H
24. ins of JP5 and two pins of JP6 are used ground and the input signal If a non inverting input is desired connect the input signals to INL and INR and place jumpers between Pin 3 and Pin 4 of JP5 and JP6 shorting INL and INR to ground Conversely if an inverting input is desired connect the input signals to INL and INR and place the jumpers between Pin 1 and Pin 2 of JP5 and JP6 shorting INL and INR to ground Alternatively single ended stereo audio can be supplied by connecting a standard Ys stereo plug to the J2 input In this case jumpers must connect INL and INR to ground OUTPUT SIGNALS Each channel of the amplifier output is available at two 2 pin 0 100 headers The speakers are connected in bridge tied load BTL configuration and the output pins are labeled with their polarity for example OUTL indicates the left channel nonin verting terminal In the standard filterless configuration the two headers on each channel are connected with 0 Q links on the pads marked BI to B4 In this case the two headers on each channel are tied together and can be used interchangeably as attachment points for the load and an audio analyzer The EMI filtering is not populated on the SSM2380 evaluation board to allow proper measurement of key parameters such as SNR and THD The top layer of the PCB contains the footprints necessary for a ferrite bead based EMI filter configuration whereas the bottom layer of the PCB contai
25. lude independent left right channel shutdown EMI emission control modes automatic level control ALC and stereo to mono input mixing This user guide describes how to use the EVAL SSM2380Z to test the features of the SSM2380 stereo amplifier It describes the hardware and software of the SSM2380 evaluation board including detailed schematics and PCB layout artwork The SSM2380 data sheet available at www analog com SSM2380 provides detailed information about the specifications internal block diagrams and application guidance for the amplifier IC The SSM2380 evaluation software can be downloaded from www analog com SSM2380 Click Evaluation Boards amp Kits and choose the appropriate Windows version 32 bit or 64 bit TYPICAL PC INTERFACE CONFIGURATION 09686 001 Figure 1 EVAL SSM2380Z Evaluation Board PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS Rev 0 Page 1 of 20 TABLE OF CONTENTS Features ici E N 1 Equipment Needed ili 1 Documents Ned dies 1 Software Ned diiniita 1 General Description aii 1 Typical PC Interface Configuration sse 1 Revision History iter nrbt aa oa 2 Evaluation Board Hardware ENEE 3 reegt 3 Input Signal ima 3 Output Signals er pr 3 Shutdown and Mode Jumpers ENEE 3 O E 4 EEPROM vorai RR 4 USB PoWwer Switch eee aaa a 4 TE Source JUMP iii 4 Operating Modes s eolie 5 PC Control E 5 AL Mod tao 5 Gain Select
26. ns the footprints for an inductor based EMI filter If EMI filtering is used only H6 and H7 connect at the proper location with respect to the filter components the load must be connected to these headers Measurements of the unfiltered waveform can be taken at H4 and H5 SHUTDOWN AND MODE JUMPERS The 2 pin jumper JP8 is used to enable and disable the SSM2380 amplifier Inserting a jumper across JP8 pulls the SD pin to the SPKVDD supply rail activating the amplifier Removing the jumper from JP8 shuts down both channels of the SSM2380 so that minimal current about 20 nA is drawn from the power supply Rev 0 Page 3 of 20 UG 248 LEDS The LEDs provide feedback to the user about the status of the Cypress USB microcontroller The function of each LED is shown in Table 1 Table 1 LED Functions Reference Designator Color Function DI Red 5V power is supplied over the USB bus D2 Yellow 12C mode is active D3 Blue GPIO LED for firmware debug purposes D4 Yellow SPI mode is active D5 Blue USB power switch enabled USB_PWR_ON EEPROM The USBi has an EEPROM on the DC bus at Address 0x51 which it uses to indicate its vendor ID and product ID to the PC as well as boot its internal program The EEPROM is an important system element that identifies the board to the host PC and stores the firmware for the Cypress USB interface The EEPROM is programmed during manufacturing via the H1 connector Avoid h
27. o the SSM2380 evaluation board There is no need to adjust the jumper positions of JP1 JP2 and JP3 but they should be connected as shown in Figure 4 Uninstall SSM2380 Control Software 1 Locate the directory where the SSM2380 zipped installer file was extracted 2 Double click setup exe Simply select Uninstall to remove the software from the host PC INITIAL SSM2380 HARDWARE SETUP To allow the SSM2380 software to control the SSM2380 evaluation board the user must make a few simple jumper connections 1 Connect the bottom and middle terminals of each jumper JP1 JP2 and JP3 The purpose of this is to connect the on board Cypress USB I C interface to the SSM2380 The signals connected are PC VDD DC CLK and DC DATA 2 Connect JP4 in one of two positions to choose an C supply rail either 1 8 V or 3 3 V These two voltages come from separate on board LDOs The SSM2380 control interface works well under either of these I C supply voltage conditions Rev 0 Page 6 of 20 Si USBi Connected 101 128ms step default Y 10 Compression default GO d 1011 90 3 3 89 default v ERROR RE Register ERRCLR R7 Register 09686 109 Figure 9 SSM2380 Evaluation Software Rev 0 Page 7 of 20 SSM2380 GUI FUNCTIONAL BLOCKS The SSM2380 control software is logically split into several different functional blocks Each functional block is split into the individual subsections
28. rfaces it does not work with PCs that only support USB Version 1 0 and USB Version 1 1 USB CONNECTOR The connection between the host PC and the Cypress USB interface device is via a standard USB cable that carries D and D signals for data communications a 5 V power supply and ground The D and D lines are a 1 wire communication interface carried by half duplex differential signals on a twisted pair The clock is embedded in the data using the nonreturn to zero inverted NRZI line code These signal lines connect directly to pins on the Cypress USB interface A surface mounted USB miniature Type B jack was selected for its low profile and increasing popularity in consumer electronics POWER REGULATOR The Cypress USB interface I O ports are capable of operating in both 1 8 V and 3 3 V modes depending on the target device in the system Two regulators one for 5 V to 3 3 V regulation and the other for 5 V to 1 8 V regulation run simultaneously when the board is powered A jumper JP4 is provided to easily switch the IOVDD supply between the two regulators D1 provides visual feedback that the board is being supplied with 5 V power from the PC USB port The position of Jumper JP4 should not be changed when the board is connected to the USB bus CYPRESS USB INTERFACE The Cypress USB interface is the core of the system including all of the necessary functionality to convert USB commands into corresponding I C or SPI read
29. s properly in either configuration For the Cypress USB microcontroller to boot properly from the EEPROM it may be necessary to power down or disconnect any other devices from the DC bus including the SSM2380 In this case remove the external 5 V supply while the USB connection is first established or remove the JP2 and JP3 jumpers and replace them only after the connection is activated 09686 004 Figure 4 Jumpers as Configured for On Board PC Operation Rev 0 Page 4 of 20 OPERATING MODES The SSM2380 has three operating modes DC control mode ALC mode and gain select mode These modes are described in detail in the SSM2380 data sheet On the evaluation board the 3 pin JP11 jumper allows the user to change between the available operating modes lC CONTROL MODE To operate the SSM2380 in DC control mode connect JP11 as shown in Figure 5 connecting the MODE pin to GND While in PC control mode JP9 and JP10 are not used and the jumpers should be left unconnected 09686 005 Figure 5 Jumper Connections for C Mode Operation ALC MODE The proper connections for ALC mode are shown in Figure 6 For this setting JP11 is open and the middle and bottom pins of JP9 are shorted This floats the MODE pin and makes a connection from the SSM2380 ALCTH pin with Resistor R24 to GND setting the SSM2380 ALC limiting range JP10 is used to activate the radiated emissions reduction mode in this configuration 09686
30. thorough EMI reduction for the entire frequency spec trum Alternatively a single capacitor of approximately 470 pF can be used if BOM reduction is a priority OUTPUT INDUCTORS L1 TO L4 If inductors are preferred for EMI filtering at the output nodes choose a component value less than 2 2 uH for these inductors The higher the inductance the lower the EMI is at the output however the cost and power consumption by the inductors are higher Using 0 47 uH to 2 2 uH inductors is recommended and the saturation current rating must be larger than 600 mA for an 8 Q load Table 5 shows suggested inductors Part No Manufacturer Z Q Imax mA DCR Q Size mm BLM18PG121SN1D Murata 120 2000 0 05 1 6 x 0 8 x 0 8 MPZ16085101A TDK 100 3000 0 03 1 6 x 0 8 x 0 8 MPZ16085221A TDK 220 2000 0 05 1 6 x 0 8 x 0 8 BLM18EG221SN1D Murata 220 2000 0 05 1 6 x 0 8 x 0 8 Table 5 Suggested Output Inductors Part No Manufacturer L uH Imax mA DCR Q Size mm LOM31PNR47M00 Murata 0 47 1400 0 07 3 2x 1 6 x 0 85 LOM31PN1ROMOO Murata 1 0 1200 0 12 3 2 x 1 6 x 0 85 LOM21PNR47MCO Murata 0 47 1100 0 12 2 0x 1 25 x 0 5 LOM21PN1ROMCO Murata 1 0 800 0 19 2 0x 1 25 x 0 5 LOH32CN2R2M53 Murata 2 2 790 0 1 3 2 x 2 5 x 1 55 LBC2518T2R2M Taiyo Yuden 2 2 630 0 13 2 5x1 8x2 1033AS 4R7M Toko 4 7 680 0 31 3 8x3 8x1 Rev 0 Page 13 of 20 EVALUATION BOARD SCHEMATICS AND ARTWORK 610 98960 XS dV d 1x4
31. vo om 9L mp so YETIOVINOD OZI TVNHSIXS 95 sO T 2 v2 gt BUIIIXH a xa e PELE EN YTTTONLNOD OZI TVNHSINI Z I SUZANNS JO NOILISOd SS Ni Ano We vxruaH V S I II IdQV E TTZTdav Gast zn cache in EXTUOH EXTUOH EXTUOH o O zva ARE TX O Sas nos 3 aa s ves Drees TINO aT T aT Figure 17 USB Interface Schematic Rev 0 Page 14 of 20 SPKVDD 5VODD_USB J2 2 D E JP7 ao PHONE ACK STEREO LI HDR1X2 LQM3IPNR47M00 777 Bl MPZ16085221A OUT L C29 C33 510pF 510pF Ha HORDA PKG H6 HDR1X2 I OL C34 510p 510pF Jps c22 R14 i 3 1 0 22uF D1 Inte 22 A A OUT L 2 3 C23 R15 gt INLN MPZ16085221A bs 0 22uF YA HDRIXA u8 SSM2380 L2 We C24 R16 DA LQM31PNR47M00 E LAR 0 22uF INRP OUTRP 3 C25 R17 INRN OUTRN 7 0 22uF HDR1X4 MODE i STDN SDALG1 LQM3IPNR47M00 SERRE JP8 Dico SCEDGO o G B3 MPZ16085221A OUT R HDR1X2 est 1635 SERVDD 510pF 510pF H5 HDRIX2 SPKG oi Hi F HDR1X2 c32 c36 SDAY SCH po 510pF 510pF HDRiX3 SPKVDD i i l OUT R B4 MPZ16085221A 21 R24 1 99k 12k E AY L__2 SVDD gt 9 L4 LQM31PNR47M00 HDR1x3 C28 mbie 0 1uF 0 1 oO 216 10 o ADRIX3 8 VW 8 8 2 Figure 18 SSM2380 Schematic Rev 0 Page
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