ISL5440XEVAL1Z User Guide
Contents
1. from interfering with the USB signal Audio Outputs The evaluation board has a standard headphone jack labeled HEADPHONE JACK J7 A 329 stereo headphone should be plugged into this jack The BNC connector J8 D L COM1 is in parallel with the audio left signal of the headphone jack The BNC connector J9 D R COM2 is in parallel with the audio right signal of the headphone jack These BNC connectors can be used to connect resistive 2 intersil AN1255 0 July 19 2006 Application Note 1255 loads and or test equipment to evaluate the performance of the IC USB Connections A B type USB receptacle labeled USB TO HOST J1 is located on the left under side of the board This receptacle should be connected using a standard USB cable to the up stream USB host controller which is usually a computer When this connection is made an ISL54400 or ISL54401 device will sense the Vays voltage from the host controller and go into USB mode The USB switches will be turned ON and the IC will get its power from the VBUS line When evaluating the ISL54402 in a USB application J13 needs to be connected to J12 for proper operation When the USB cable from the computer is connected at J1 the NOx switches will both turn ON An A type USB receptacle labeled USB TO DEVICE J2 is located on the right under side of the board This receptacle should be connected to the USB device using a standard USB cable or if possible plu2. also contains varied test points TP1 TP9 and JP2 JP3 for making test equipment connections Refer to eval board 1SL54402 Audio Mode Operation schematic and Board Component Definitions on page 3 for definition of the various test points 7 If you disconnect the USB cable from J1 the IC will return to Audio mode You can now plug the headphone set into the headphone jack and turn the audio source ON to once again play music 1 Install 320 headphone in the headphone jack J7 No USB cable should be connected at the J1 USB TO 7 If you disconnect the USB cable from J1 and connect J12 HOST connector and J13 to ground the IC will return to Audio mode You can now plug the headphone set into the headphone jack 2 Connect BNC connector J13 to the banana jack J12 and turn the audio source ON to once again play music Then connect J12 to ground This will put the logic control pins IN1 and IN2 of the IC at ground You will now be in Audio mode 19 audio switches are ON Board Schematics Lay out BOM The schematics board plots and bill of materials can be obtained by contacting the Intersil at 1 888 INTERSIL All Intersil U S products are manufactured assembled and tested utilizing ISO9000 quality systems Intersil Corporation s quality certifications can be viewed at www intersil com design quality Intersil products are sold by description only Intersil Corporation reserves the right to make changes in circuit des
3. fo 3 Je De7L CQM1 De R CQM2 D G S AUDIO LEFT ISL5440XEVAL1Z aa A e REVS o gt AUDIO RTGHT intersil a 1 888 INTERSIL FIGURE 1 ISL5440XEVAL1 BOARD WITH IC DIP BOARD INSTALLED Board Architecture Layout Basic Layout of Main Board The basic layout of the main board is as follows Refer to Figure 1 Power and Ground connections are at the top of the board J10 and J11 Audio Source Inputs are at the lower right side of the board J3 J6 Audio outputs are at the lower left side of the board J7 J8 J9 Connector J7 is a standard headphone jack for connecting a 320 headphone USB connection to an upstream host controller Computer is made at connector J1 located on left under side of the main board USB connection to a downstream USB device is made at connector J2 located on right under side of the main board 1 CAUTION These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures 1 888 INTERSIL or 1 888 468 3774 Intersil and Design is a trademark of Intersil Americas Inc Copyright Intersil Americas Inc 2006 All Rights Reserved Application Note 1255 Located in the center of the board is the DIP socket U1 The IC to Dip Daughter Board plugs into this socket The main board has a pin 1 label to show how the IC daughter board should be oriented in the socket The daughter board pin 1 indicator dot needs to be aligned with the main evaluation boa
4. removal of ICs The USB Audio Switch ICs have two modes of operation called Audio mode and USB mode The main evaluation board contains standard Audio and USB connectors to allow the user to easily interface with the IC to evaluate its functions features and performance in the two modes of operation For example when the board is properly powered a headphone can be plugged into the headphone jack J7 and a stereo source such as a MP3 player can be connected at the RCA connectors J3 AUDIO LEFT and J4 AUDIO RIGHT to play music through the audio switches of the IC See Figure 2 You can then turn off the audio source remove the headphones and attach a USB cable from a computer to USB connector J1 This will establish a connection from the computer through the USB switches of the IC to the USB device that is connected at the USB connector J2 to send and receive data This application note will guide the user through the process of configuring and using the evaluation board to evaluate the ISL5440x family of devices in both the Audio mode and the USB mode ISL5440XEVAL1Z Evaluation Board User s Manual AN1255 0 July 19 2006 Features Dip Socket For Quick Removal and Installation of DUTs e Standard USB Connectors e RCA Audio Input Jacks and Headphone Speaker Jack e Convenient Test Points and Connections for Test Equipment Picture of Evaluation Board Top View VTERM INI HEADPHONE JACK Js i
5. you want to use the VTERM output and the 1 5kQ resistor on the board install a jumper at JP1 For a USB full speed device 12Mb s connect jumper from middle post to left post For a USB low speed device 1 5Mb s connect jumper from middle post to right post If the VTERM output is not going to be used leave the JP1 jumper un populated The jumper should also be un populated when evaluating the ISL54401 and ISL54402 ICs Attach the main evaluation board to a DC power supply at J10 VDD and J11 GND Positive terminal at J10 and negative terminal at J11 The supply should be capable of delivering 2 7V to 3 6V and 100A of current Set the supply voltage to 3V Connect the stereo audio source left channel to J3 RCA connector or J5 BNC connector and right channel to J4 RCA connector or J6 BNC connector Connect the USB device to the USB B type receptacle J2 USB TO DEVICE ISL54400 and ISL54401 Audio Mode Operation 1 Install 320 headphone in the headphone jack J7 No USB cable should be connected at the J1 USB TO HOST connector You will now be in Audio mode 12 audio switches are ON and power to IC is from Vpp supply Turn the audio source ON You should hear the music in the headphones You can observe the audio signals on an oscilloscope or audio analyzer by using the J8 and J9 BNC connectors Connect to J8 for left audio and J9 for right audio The board also contains varied test points
6. 400 and ISL54401 devices is determined by the voltage at the Vgus pin If Vays is floating no USB host controller connected at the J1 connector the part will be in the Audio mode If Vgus is greater than Vpp by 0 8V USB host controller connected at the J1 USB connector the part will be in the USB mode In a typical application the Vays voltage from host controller will be in the range of 4 4V to 5 25V and the Vpp voltage will be in the range of 2 7V to 3 6V ISL54402 Logic control for the ISL54002 device is the same as a standard dual SPDT switch The voltage applied at J13 IN2 and J12 IN1 determines whether the NOx Digital or NCx Audio switches are ON or OFF The ISL54002 logic levels are TTL compatible See truth table on page 3 of data sheet In a typical application connector J12 and J13 should be connected together allowing the logic control inputs to the IC to work in tandem If you pull them LOW by connecting them to ground the NCx switches will be ON If you pull them HIGH by connecting them to VDD or VBUS of the computer In USB application the NOx switches will be ON NOTE The BNC connector J13 is wired in parallel with the VBUS line of the USB J1 connector When you connect a USB cable from a computer to the J1 USB connector this will put the logic of pin 2 IN2 of the IC at 5V If connector J12 is connected to connector J13 then the logic of pin 10 IN1 of the IC will also be at 5V and both USB switches will
7. Connect BNC connector J13 to the banana jack J12 voltage from the host can be monitored by connecting a When the USB cable from the computer is connected in voltmeter at the J13 BNC connector The board also to J1 USB TO HOST the Vays voltage will put the logic contains varies test points TP1 TP9 and JP2 JP3 for control pins IN1 and IN2 of the IC at 5V You will now be making test equipment connections Refer to eval board in USB mode 49 digital switches are ON schematic and Board Component Definitions on page 3 for definition of the various test points 4 Connect USB cable from host PC computer to the USB A type receptacle J1 USB TO HOST You will now be 6 If using VTERM output from ISL54400 you can monitor in USB mode 42 USB switches this voltage by connecting a voltmeter at the banana jack J12 In audio mode VTERM should be floating In USB mode it should be outputting a voltage between 3 0V and 5 You should now be able to send and receive data between the host and USB device 3 6V NOTE For the IC to output 3 0V to 3 6V Vays 6 You can observe the D and D USB digital signals on an voltage must be between 4 4V and 5 25V and Vpp must oscilloscope or other test equipment by connecting to the be at least 2 5V J8 J14 J9 and J15 BNC connectors Connect to J8 J14 for D signal and to J9 J15 for D signal The Vagus voltage from the host can be monitored by connecting a voltmeter at the J13 BNC connector The board
8. TP1 TP9 and JP2 JP3 for making test equipment connections Refer to eval board schematic and Board Component Definitions on page 3 for definition of the various test points 4 intersil AN1255 0 July 19 2006 Application Note 1255 ISL54400 and ISL54401 USB Mode Operation 3 Turn the audio source ON You should hear the music in 1 Turn OFF audio stereo source the headphones 4 You can observe the audio signals on an oscilloscope or audio analyzer by using the J8 and J9 BNC connectors Connect to J8 for left audio and J9 for right audio The board also contains varied test points TP1 TP9 and JP2 JP3 for making test equipment connections Refer to eval board schematic and Board Component Definitions 4 You should now be able to send and receive data on page 3 for definition of the various test points bet the host and USB device eee ee ayes ISL54402 USB Mode Operation 2 Remove headphone from J7 Headphone Jack 3 Connect USB cable from host PC computer to the USB A type receptacle J1 USB TO HOST You will now be in USB mode 49 USB switches are ON and power to IC is from Veys line from the USB host 5 You can observe the D and D USB digital signals on an oscilloscope or other test equipment by connecting to the 1 Turn OFF audio stereo source J8 J14 J9 and J15 BNC connectors Connect to J8 J14 2 Remove headphone from J7 Headphone Jack for D signal and to J9 J15 for D signal The Vays 3
9. be ON This is required for proper USB operation Audio Inputs The evaluation board has two audio inputs labeled AUDIO LEFT J3 or J5 and AUDIO RIGHT J4 or J6 Each of these inputs have a BNC connector wired in parallel with a RCA jack connector You can connect an audio source generator at either the BNC connector or the RCA connector In a typical application the left and right outputs of a stereo source such as an MP3 player would be connect to the RCA jacks J3 and J4 respectfully The internal audio switches of the ISL5440x family of devices were designed to pass a 0 6Vpms signal across a 329 headphone load with very low signal distortion The audio source amplitude should be less than 1 75Vpp 0 62Vrms for best performance A 3Vpp signal is acceptable but performance will degrade The audio channels are AC coupled with 100uF capacitors These caps remove any DC voltage from the audio signals and reference them to ground of the device NOTE The audio switches are not bi directional The audio source needs to be connected at J3 or J5 and J4 or J6 Do not try to apply an audio source at the J8 and J9 BNC connectors on left side of the board and loads at J3 J6 on right side of the board NOTE When in USB mode the audio source needs to be in a high impedance state so it will not interfere with the USB signal Since the audio source inputs are AC coupled on the eval board simply turning the audio source OFF will isolate it
10. d has 02 resistors R2 R3 R4 and R5 that can be de populated to disconnected BNC jacks J7 J8 J9 J14 J15 and headphone jack J7 from the switch signal path See schematic for which resistors go to which connectors VreRm Connection ISL54400 only To use VTERM output of the ISL54400 part and the 1 5kQ resistor R1 on the board will require a jumper installed at JP1 For a USB full speed device 12Mb s connect jumper from middle post to left post of JP1 For a USB low speed device 1 5Mb s connect jumper from middle post to right post of JP1 NOTE VteErw is high impedance if VBUS is floating or lower in voltage than the voltage at VDD J10 and J11 VTERM will output a voltage in the range of 3 0V to 3 6V when Vgus voltage is gt 4 4V and Vpp is gt 2 5V If the VTERM output is not going to be used leave the JP1 jumper unpopulated The jumper should also be unpopulated when evaluating the ISL54401 and ISL54402 ICs Board Component Definitions DESIGNATOR DESCRIPTION U1 10 Ld Dip Socket J1 B type USB Receptacle J2 A type USB Receptacle J3 J5 Left Stereo Audio Input J4 J6 Right Stereo Audio Input J7 Headphone Speaker Jack J8 D L COM1 BNC Connector J9 D L COM2 BNC Connector J10 VDD Positive Connection J11 VDD Negative Connection J12 VTERM IN1 J13 VBUS IN2 J14 D BNC Connector J15 D BNC Connector JP1 Jumper to Connect VTERM throug
11. g the USB device directly into this receptacle In USB mode the USB host controller and USB device will be connected through the internal USB switches of the IC Unlike the audio switches the USB switches are bi directional which allow the host computer and downstream USB device to both send and receive data Note Before connecting the USB host controller at connector J1 the headphones must be removed from the headphone speaker jack J7 This will prevent the audio load from interfering with USB signal transmission The main purpose of the ISL54400 and ISL54401 devices is to allow the use of acommon USB and Audio Headphone Connector in Personal Media Players and other portable battery powered equipment Either a headphone will be in the common connector to play music or a USB cable from a computer will be in the common connector to transmit digital data such as music into the memory of the Media Player The BNC connector J8 D L COM1 is in parallel with the D line of the J1 USB connector The BNC connector J9 D R COM2 is in parallel with the D line of the J1 USB connector The BNC connector J13 VBUS IN2 is in parallel with the Vgus line of the J1 USB connector The BNC connector J14 D is in parallel with the D line of the J2 USB connector The BNC connector J15 D is in parallel with the D line of the J2 USB connector These BNC connectors can be used to connect test equipment to evaluate the performance of the IC The boar
12. h 1 5KQ resistor to either D or D Line JP2 D and D Differential Test Probe Connection USB Host COM Side of Switch JP3 D and D Differential Test Probe Connection USB Device Side of Switch TP1 VDD Test Point TP2 TP6 TP7 Ground Test Point TP8 TP9 TP3 VBUS Test Point TP4 Audio Left Input Test Point TP5 Audio Right Input Test Point 3 intersil AN1255 0 July 19 2006 Application Note 1255 DC POWER SUPPLY Computer USB Port Headphone Jack J8 J9 00 ISL5440X EVALUATION BOARD USB Device USB Port Audio Source Audio Right FIGURE 2 BASIC EVALUATION TEST SETUP BLOCK DIAGRAM Using the Board Refer to Figure 2 Lab Equipment The equipment external supplies and signal sources needed to operate the board are listed below 1 2 oon ff Ww 2 7V to 5 5V DC Power Supply Stereo Audio Source MP3 Radio CD Player or Audio Generator 32Q Headphone Set or Audio Analyzer Oscilloscope Two Standard USB Cables Computer with USB port USB Device i e Printer USB Memory Stick MP3 Player with USB Port Initial Board Setup Procedure ts Insert the daughter board with mounted IC into the dip socket on the main board Verify that the daughter board is oriented in the socket correctly The pin 1 dot on the daughter board needs to be lined up with the pin 1 designator on the main evaluation board If evaluating the ISL54400 part and
13. ign software and or specifications at any time without notice Accordingly the reader is cautioned to verify that data sheets are current before placing orders Information furnished by Intersil is believed to be accurate and reliable However no responsibility is assumed by Intersil or its subsidiaries for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries For information regarding Intersil Corporation and its products see www intersil com 5 intersil AN1255 0 wees July 19 2006
14. intersil Application Note Description The ISL5440XEVAL1Z evaluation board is designed to provide a quick and easy method for evaluating the ISL54400 ISL54401 and ISL54402 USB Audio Switch ICs An evaluation kit consists of the following items One Main Evaluation Board Three uTQFN to Dip Daughter Boards with mounted IC ISL5440XEVAL1Z Evaluation Board User s Manual ISL54400 ISL54401 ISL54402 Data Sheet Main Evaluation Board Schematic The ISL54400EVAL1Z kit contains three daughter boards with the ISL54400 part The ISL54401EVAL1Z kit contains three daughter boards with the ISL54401 part The ISL54402EVAL1Z kit contains three daughter boards with the ISL54402 part The ISL5440x devices are unique ICs To use this evaluation platform properly requires thorough knowledge of the operation of the ICs Refer to the data sheet for an understanding of the functions and features of this family of devices Studying a device s truth table along with its pinout diagram on pages 2 and 3 of the data sheet is the best way to get a quick understanding of how a particular part in this family works A picture of the main evaluation board with IC to dip daughter board installed is shown in Figure 1 The main board has a 10 pin dip socket U1 located in the center of the board An IC is soldered onto a 10 pin dip daughter board that is plugged into the dip socket on the main board Using daughter boards allow for the easy installation and
15. rd dip socket labeled 1 Power Supply The ISL5440x devices require a DC power supply for proper operation The DC power supply and terminals are connected at banana jacks J10 VDD and J11 GND located at the top of the board ISL54400 AND ISL54401 In Audio mode the Vpp power supply connected at banana jacks J10 VDD and J11 GND provides power to the part A 2 7V to 3 6V DC power supply is needed for proper operation The power supply should be capable of delivering 1004A of current In USB mode the Vays 5VDC voltage from the host USB controller computer connected at the USB connector J1 USB to HOST provides power to the part NOTE For the ISL54400 and ISL54401 devices the Vays voltage needs to be at least 0 8V higher than the voltage at Vpp to turn the audio switches OFF and turn the USB switches ON In a typical application the Vays voltage from host controller will be in the range of 4 4V to 5 25V and the Vpp voltage will be in the range of 2 7V to 3 6V The ISL54400 VTERM does not output a voltage unless Veus gt Vpp 0 8V and Vpp gt 2 5V ISL54402 Power for the ISL54402 device is always provided by the DC voltage source connected at the J10 VDD and J11 GND Led jacks The VDD voltage can be in the range of 1 8V to 5 5V In a USB application it should be set in the range of 2 7V to 5 5V and should be capable of delivering 100A of current Logic Control ISL54400 AND ISL54401 The state of the ISL54
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