Evaluate: MAX3514/MAX3516/MAX3517 MAX3514
Contents
1. 250 MADE 05 Figure 6 514 517 EV Kit PC Board Layout Solder Figure 7 MAX3516 EV Kit Component Placement Guide Side Component Side 10 MAXIM 514 3516 3517 Evaluation Kits Figure 10 516 Kit PC Board Layout Ground Plane Figure 11 MAX3516 EV Kit PC Board Layout Power Plane MAAILM 11 2 lt Evaluate 514 3516 351 7 514 3516 3517 Evaluation Kits Figure 12 MAX3516 Kit PC Board Layout Ground Plane Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product No circuit patent licenses are implied Maxim reserves the right to change the circuitry and specifications without notice at any time 12 Maxim Integrated Products 120 San Gabriel Drive Sunnyvale CA 94086 408 737 7600 2001 Maxim Integrated Products Printed USA MAXIM is a registered trademark of Maxim Integrated Products2. 100kQ 5 resistors 0603 3000 5 resistors 0603 86 60 1 resistor 0805 Murata Sonos Transformer 1 to 1 Macom ECT1 1T Transformer 2 to 1 voltage ratio type B5F 348PT 1087 SMA connectors PC mount Johnson 142 0701 201 or Digi Key J502 ND JU1 JU7 DB25 connector right angle female Digi Key A2102 ND or AMP 745783 4 1 x 3 pin headers 0 1in centers Digi Key S1012 36 ND JU1 JU7 Shunts Digi Key S9000 ND IN2 Test points Digi Key 5000K ND MAX3514 MAX3517 EV kit circuit board Rev 2 514 516 517 Software disk MAX3514 MAX3516 MAX3517 data sheet MAX3514 MAX3516 MAX3517 EV kit data sheet MAKIM 514 3516 3517 Evaluation Kits Table 1 Jumper Setting Functions JUMPER FUNCTION JU1 Set the method of control of SHDN 02 Set the manual control state of SHDN U3 Set the method of control of TXEN SHORT PIN1 TO PIN2 SHORT PIN2 TO PIN3 PC port control Manual control through JU2 Logic 1 state Vcc Logic 0 state GND PC port con Manual control through JU4 U4 Set the manual control state of TXEN Logic 1 state Logic 0 state GND U5 CS input PC por N A U6 SDA input PC por N A U7 SCLK input Quick Start The 514 516 517 EV kits are fully assembled and factory tested Follow the instruc
3. text file Max3514 exe Windows executable 510 DLL file for printer port control Msvbvm50 dll DLL file pins labeled 5V and GND on the circuit board Connect a 50Q signal source to INPUT preset the signal source for 1 34dBmV across 500 load and terminate OUTPUT with a spectrum ana lyzer or network analyzer having a 50Q input imped ance If using a signal source with a source imped ance other than 50Q or if a different input imped ance is required be sure to replace resistor R1 with the appropriate value resistor Connect a 25 pin male to male cable between the parallel printer port of the PC and the 25 pin female connector on the EV kit board 3 See Table 1 for board jumper settings 4 Turn on the power supply Turn on the PC and the test equipment 5 Run the software program Detailed Description Using the Software MAX3514 MAX3516 MAX3517 use a serial data interface SDI to set gain Some means of communi cating with the SDI is required to use the MAX3514 MAX3516 MAX3517 EV kits A microprocessor pattern generator or PC can be used for this function Software is included in these EV kits to facilitate the use of a PC Evaluate 514 3516 351 7 3514 3516 3517 Evaluation Kits disks included with the MAX3514 MAX3516 MAX3517 EV kit
4. DESCRIPTION 10 ceramic capacitors 0805 Murata GRM40X7R104K016A 1000pF 10 ceramic capacitors 0805 Murata 40102 050 DESIGNATION Component List MAX3517 DESCRIPTION C1 C6 Leave site open C2 C5 C8 C11 0 1hF 10 ceramic caps 0603 Murata GRM39X7R104K016A 1000 10 ceramic caps 0603 Murata GRM39X7R102K050A C7 Open 10uF tantalum capacitor 10 16V min AVX TAJC106K016 R1 49 9 Q 1 resistor 0402 R2 R3 R4 R6 R13 R16 R19 R22 R23 Open R5 43 20 1 resistor 0805 R14 R15 100kQ 5 resistors 0805 821 86 60 1 resistor 0805 00 resistors 0805 BLM21A601RPT Murata 1 to 1 transformer Macom ETC1 1T 4 to 1 transformer type B5F TOKO 458PT 1087 MAX3516EUP 20 pin TSSOP EP DB25 connector right angle female Digi Key A2102 ND SMA connectors edge mount EFJohnson 142 0701 801 Digi Key J502 ND Note Cut center pin to approximately 1 16in length 1 x 3 pin headers 0 1in centers Digi Key S1012 36 ND Shunts Digi Key S9000 ND Test points Digi Key 5000K ND MAX3516 EV kit circuit board Rev A 1 1 MAX3514 software disk None 1 516 data sheet None 1 MAX3516 EV data sheet 10 16V min tantalum AVX TAJC106K016 49 9Q 1 resistor 0603 Leave site open 43 2Q 1 resistor 0805
5. 3 of jumper JU1 and pins 2 and 3 of jumper JU3 This will allow SHDN and TXEN to be controlled by JU2 and JU4 respectively JU2 and JU4 are used to place either Vcc or ground at SHDN or TXEN Pin 3 of JU2 and pin 3 of JU4 are ground and 1 is Vcc To control the SHDN and TXEN features using the soft ware shunt 1 and pin 2 of JU1 and JUS Manual Control of Serial Data Interface If using a source other than a PC to drive the serial data interface of the MAX3514 MAX3516 MAX3517 EV kits such as a digital pattern generator or microprocessor remove the shunts on jumpers JU5 JU6 and JU7 Access to the serial data interface is available through these jumpers Termination pads are provided R2 R3 R4 Solder an appropriate resistor to these pads if desired Refer to the MAX3514 MAX3516 MAX3517 data sheet for a description of the serial data interface 4 To control the SDI using the software shunt pin 1 and pin 2 of JUS JU6 and JU7 Input Circuit The input circuits of the MAX38514 MAX3516 MAX35 17 EV kits are configured with a 1 1 transformer T1 and a 49 9Q input resistor This allows the input to be driven with single ended 50Q test equipment The transformer T1 is used to generate a differential signal as rated performance is specified with a differential input drive typically from a differential lowpass filter If the MAX3514 MAX3516 MAX3517 are to be driven single ended the input transformer T1
6. must be removed and the undriven input connected to ground through a blocking capacitor Output Circuit The MAX3514 MAX3516 MAX3517 have differential out puts This architecture aids in suppressing second order distortion harmonics To convert to a single ended output a 2 1 voltage ratio transformer T2 is used Since most test equipment is supplied with a 50Q termination impedance a minimum loss pad is provid ed on the output of the transformer to increase the load impedance to a nominal 75Q This places the proper load on the device but will also reduce the measured output voltage level by 7 5dB It is essential to consider this when making any measurements with the EV kit 7 588 must be added to all measurements of voltage gain and output voltage level including noise to arrive at the correct value for a 75Q system Use 75Q test equipment if available and take the fol lowing steps 1 Remove the 50Q output SMA connector and replace it with a 75Q connector 2 Remove 5 and replace it with a 00 resistor or some other type of shunt 3 Remove R21 4 Be sure to use a 75Q cable Analysis Harmonic Distortion A filter will be needed to reject the harmonics generated by the signal source For this example a lowpass filter with approximately 25MHz to 35MHz cutoff frequency will be required This filter will need to reject at least 20dB of signal at 4 2 Set the 500 signal source for 20MHz and
7. 13dBm Adjust the amplitude to account for the insertion loss in the filter Verify with the spectrum analyzer that the second and third harmonics generated by the source are suppressed by at least 70dBc MAKIM 514 3516 3517 Kits Connect the filter between INPUT of the EV kit and the output of the signal source making sure the proper ter minations are being used for this particular filter Connect a spectrum analyzer to OUTPUT Set the cen ter frequency for 40MHz and the span for 50MHz more Adjust the reference level so that the fundamen tal 2QOMHz tone is within 10dB to 20dB of the refer ence level If the fundamental is less than 10dB below the reference level the harmonic distortion of the spec trum analyzer may prevent accurate measurement of the distortion Set the gain code to 125 D7 1 approximately 27dB of gain Measure the level of the fundamental second and third harmonics on the spectrum analyzer These readings have units of dBm To convert from dBm to dBmV a 500 system use the following equation X dBmV Y dBm 4788 500 system Add 7 5dB to this value to account for the attenuation of the minimum loss pad dBmV for a 750 load The gain can now be calculated in dB and the harmonic distortion can be calculated in dBc Switching Transients To measure the transmit enable and transmit disable transients the TXEN pin will be driven from an
8. 19 1826 0 3 01 MAKII MAX3514 MAX3516 MAX3517 Evaluation Kits General Description The MAX3514 MAX3516 MAX3517 evaluation kits EV kits simplify evaluation of the MAX3514 MAX3516 MAX3517 CATV upstream amplifiers Each kit includes a data interface that can be programmed through the parallel port of a standard PC Software Windows 95 98 compatible is included to facilitate this function This software allows the user to program both the gain and transmit modes through a simple user interface Access to the device input and output is provided through 500 SMA connectors The input is matched to 50Q while the output circuit includes a minimum loss pad that presents a 75Q load to the output transformer when using 50Q test equipment Windows is a registered trademark of Microsoft Corp DESIGNATION C1 C6 DESCRIPTION Leave site open 0 1pF 10 ceramic capacitors 0603 Murata GRM39X7R104K016A C2 C5 C8 C11 MAX3516EVKIT Features 5V Single Supply Operation Output Level Range up to 64dBmV QPSK Gain Programmable in 0 5dB Steps Transmit Disable Mode Shutdown Mode Control Software Included Fully Assembled and Tested Surface Mount Board Ordering Information PART MAX3514EVKIT TEMP RANGE 40 C to 85 C 40 C to 85 C IC PACKAGE 20 QSOP 20 TSSOP EP MAX3517EVKIT 40 C to 85 C 20 QSOP Exposed paddle Component List MAX3514 DESIGNATION DESCRIP
9. MAIDXIZWMA ano an9 14910911218 98 gt 0 14109 58 144109712118 78 2 9 lt lt Figure 2 MAX3516 EV Kit Schematic MAKIM ion Kits 514 3516 3517 Evaluat Evaluate 514 3516 351 7 er INdLNO 2 SO800NI 340001 54 14 4913 W09 V W ZLGEXVN gt HOC gt jddl09YHINT19 99 gt 58 vd Figure 3 5 17 EV Kit Schematic MAAILM Evaluate 514 3516 351 7 3514 3516 3517 Evaluation Kits SVIAAI VI MAX3514 17 EVALUATION 404 35 See NI VCI 407 5 25 MADE IN USA REV Figure 4 MAX3514 MAX3517 EV Kit Component Placement Figure 5 MAX3514 MAX3517 EV Kit PC Board Layout Solder Guide Component Side Side 3516 EVALUATION KIT E m
10. TION Transformer 2 to 1 voltage ratio type BSF Toko 348PT 1087 MAX3514EEP 20 pin QSOP 1000pF 10 ceramic capacitors 0603 Murata GRM39X7R102KO050A C3 C4 10 16V min tantalum C7 capacitor AVX TAJC106K016 SMA connector PC mount Johnson 142 0701 201 or Digi Key J502 ND DB25 connector right angle ale i Key A2102 ND or R1 49 90 1 resistor 0603 R2 R3 R4 R6 R13 R16 R19 R14 R15 JU1 JU7 Leave site open JU1 JU7 AMP 745783 4 3 pin headers 0 1in centers 1012 36 ND Shunts Digi Key 59000 IN1 IN2 43 2Q 1 resistor 0805 Test points Digi Key 5000 100kQ 5 resistors 0603 Non R21 86 60 1 resistor 0805 L1 00 resistor 0805 B3 B6 Murata BLM21A601RPT Transformer 1 to 1 Macom ECT1 1T MAX3514 MAX3517 EV kit circuit board Rev 2 14 MAX3516 MAX3517 software disk 14 MAX3516 MAX3517 data sheet 14 MAX3516 MAX3517 EV kit data sheet Maxim Integrated Products 1 For pricing delivery and ordering information please contact Maxim Dallas Direct at 1 888 629 4642 or visit Maxim s website at www maxim ic com ZLESEXVIW OLSEXVW PELSEXVW Evaluate 514 3516 351 7 3514 3516 3517 Evaluation Kits DESIGNATION C1 C6 C8 C9 Component List MAX3516
11. dB of gain MAX3514 Connect the output of the postamplifier to the spectrum analyzer and the input to OUTPUT on the EV kit Set the spectrum ana lyzer as follows Center frequency 35MHz Span 2 Reference 50dBm Scale 10dB div e IF bandwidth 1kHz Power up the postamplifier If the spectrum analyzer being used has noise marker function enable it The output noise can now be read directly from the spectrum analyzer Move this marker to 42MHz Read the value of the noise density from the spectrum analyzer This noise value is a combination of the output noise of the 514 516 517 the gain of the postamplifier and the noise figure of the postamplifier With the specified noise figure of 10dB the noise contribution of the postamplifier may be ignored The minimum loss pad reduces the actual measured value by 7 5dB Use the following equation to arrive at the MAX3514 MAX3516 MAX3517s output noise in a 160kHz bandwidth VNOISE PNOISE 47dB 7 588 10 log 160 000 GAMP where VNOISE MAX3514 MAX3516 MAX3517 output noise in dBmV measured 160kKHz bandwidth PNOISE Noise density in dBm Hz read from the spectrum analyzer Gain of the postamplifier in dB If the spectrum analyzer being used does not have noise marker function corrections must be made to account for the IF bandwidth used to make the mea surement Consult the user s manual for y
12. external source No input signal is applied and the output is viewed on an oscilloscope Connect OUTPUT to the oscilloscope s 50Q input Set the scope s time base to 5us div and the vertical scale to 5mV div Set the pulse generator as follows e Amplitude 5V e Duty cycle 50 Rise fall time 100ns e Pulse width 25 Offset 2 5V Take care not to drive the 514 516 MAX3517 TXEN pin below 0 or above 5V Turn on the power supply Remove the shunt from jumper JU3 TXEN and connect the output of the pulse generator to pin 2 of this jumper Trigger the oscilloscope from the pulse generator using a convenient method Set the gain code to 125 D7 1 A rising and falling edge transient should appear on the scope s CRT The amplitude of this transient should be less than 40mVp p Multiply the value of the mea sured transient by 2 37 to account for the presence of the minimum loss pad The gain may now be changed to show the output transient s dependence on gain MAXIM Output Noise To measure output noise a spectrum analyzer is used A postamplifier with less than 10dB noise figure and greater than 40dB gain within the band of interest is needed With the power supply off place a 50Q termination on the input of the EV kit Turn on the powers supply to the MAX3514 MAX3516 MAX3517 EV kits Using the software set the device to transmit mode with a gain code of 119 D7 1 approx imately 24
13. our spectrum analyzer for details Once the correction is made the value read from the spectrum analyzer can be convert ed to a noise density dBm Hz and the above formula can be used ZLESEXVIN OLSEXVW PELSEXVW Evaluate 514 3516 351 7 3514 3516 3517 Evaluation Kits Noise can now be measured at various gains Output noise in transmit disable mode is insignificant Layout Considerations The MAX3514 MAX3516 MAX3517 evaluation board can serve as a guide for your board layout Particular attention should be paid to thermal design and to the output network The MAX3514 MAX3516 MAX3517 package exposed paddle EP conducts heat out of the part and also provides a low impedance electrical con nection The EP must be attached to the PC board ground plane with a low thermal and electrical imped ance contact Ideally this would be provided by solder ing the backside package contact directly to a top metal ground plane on the PC board Alternatively the EP could be connected to a ground plane using an array of plated vias directly below EP MAXIMA MAX3514 MAX3516 MAX3517 BIAS CONTROL Component Suppliers Fax SUPPLIER 803 946 0690 978 442 5000 814 237 1431 TOKO 847 297 0076 978 442 4178 814 238 0490 847 297 7864 The output circuit that connects OUT and OUT pins 15 and 16 to the output tran
14. s contain four files each Table 2 lists these files and their appropriate usage If your PC has Windows 95 98 installed MAX3514 EXE The soft ware can also be found on the Maxim website Gain Adjustment The valid gain code ranges from 0 to 127 decimal The nominal change in gain is 0 5dB gain code Gain codes are set exclusively by programming the SDI Refer to the MAX3514 MAX3516 MAX3517 data sheet for details High Power and Low Noise High power HP mode and low noise LN mode may only be controlled via the PC interface Manual control of the jumpers for the EV kits boards is not possible For DOCSIS applications HP mode should be used for output levels above 42dBmV This corresponds to gain code 87 LN mode should be used below this output level This corresponds to gain code 115 A transition from HP mode gain code 87 to LN mode gain code 117 will result in a 1dB step Shutdown and Transmit Enable Jumpers JU1 through JU4 determine how the shutdown and transmit enable features are controlled Pin 2 of JU2 and pin 2 of JU4 are connected directly to the device If an external source such as a modulator chip or microprocessor is used to control these features make the connections to pin 2 of JU2 and pin 2 of JU4 Pads are provided on the board R18 and R19 respec tively for placement of termination resistors if needed If manual control of shutdown and transmit enable is desired shunt pins 2 and
15. sformer T2 should be as symmetrical as possible to reduce second order distor tion In addition the capacitance of this path should be kept low to minimize gain rolloff at high frequencies Functional Diagram D A CONVERTER SERIAL DATA INTERFACE CS SDA SCLK MAX3514 MAX3516 ONLY MAKIM Kits ion 514 3516 3517 Evaluat Evaluate 514 3516 351 7 znr NOQHS IJA 40 1801 1485 0 01 6202 19 11 10 W09 V W 1ddl09vlzN 9 28 2 0667 y 2 x T 080041 WV inano 9 919 00 ZIJA 390 15 JOA azr enr N3XL 0700 SLY 0700 ler zr SFzr al zr Ler 4 99 0 1ddl09VYHN19 58 Figure 1 MAX3514 EV Kit Schematic MAXIM Kits ion MAX3514 MAX3516 MAX3517 Evaluat 00px 005 002x 001 4191 NaXL
16. tions in the Connections and Setup section Note The output circuit includes a minimum loss pad that is used to bring the load impedance up to 75Q This must be accounted for all measurements see Output Circuit section Note The input transformer is supplied to allow differ ential input drive from a single ended source A trans former is not required in the application Test Equipment Required e DC supply capable of delivering 5 5V and 200mA of continuous current e HP 8648 or equivalent signal source capable of gen erating 40dBmV up to 200MHz e HP 8561 or equivalent spectrum analyzer with a minimum 200MHz frequency range Digital multimeter DMM to monitor Vcc and Icc if desired e Lowpass filters to attenuate harmonic output of sig nal sources if harmonic measurements are desired e Network analyzer such as the HP 8753D may be used to measure gain and harmonic levels if config ured with this option contact test equipment manu facturer e IBM PC or compatible with Windows 95 98 installed Male to male 25 pin parallel cable straight through Oto 5V pulse generator transient measurement e Low noise amplifier with 4088 gain from 5MHz to 100MHz noise measurement e Oscilloscope with 200MHz bandwidth Connections and Setup 1 Connect the power supply preset to 5V to the MAXIM PC por N A Table 2 MAX3514 MAX3616 MAX3517 EV Kit Software FILENAME DESCRIPTION Max3514 txt Read
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