MAX3510 Evaluation MAX3510 evaluation kit) simplifies evaluation

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MAX3510 Evaluation MAX3510 evaluation kit) simplifies evaluation

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MAX3510 Evaluation
MAX3510 evaluation kit) simplifies evaluation MAX3510 CATV upstream amplifier. includes serial data interface, which programmed parallel port standard Software (DOS Windows) included facilitate this function. This software allows user program both gain transmit modes through simple user interface. Access device input output provided through connectors. input matched while output circuit contains series resistor that increases load output transformer nominal when using test equipment. Single Operation Output Level Range from <8dBmV 64dBmV Gain Programmable Steps Software Transmit-Disable Mode Shutdown Modes Control Software Included Fully Assembled Tested Surface-Mount Board
Features
Evaluates: MAX3510
Ordering Information
PART MAX3510EVKIT TEMP. RANGE -40°C +85°C PACKAGE SSOP
Component List
DESIGNATION L1-L3 IN1, JU1-JU4 JU5-JU7 None R2-R4, R6-R13, R16, R17-R19 R14, None None None None DESCRIPTION Surface-mount bead cores Murata BLM11P 300SPT 0.1µF, ceramic capacitors 0.001µF, ceramic capacitors 0.0033µF, min, ceramic capacitor 10µF, ±10% capacitor TAJB106K010 Test points connectors (edge mount) DB25 connector, right angle, female 3-pin headers 2-pin headers Shunts (for JU1-JU7) 49.9, resistor installed resistor 100k, resistors transformer (2:1 voltage ratio) Toko 458PT-1087 transformer M/A-COM ETC1-1T MAX3510EEP MAX3510 data sheet MAX3510 board MAX3510 software disk MAX3510 data sheet
Component Suppliers
SUPPLIER M/A-COM Murata Toko PHONE 803-946-0690 978-442-5000 814-237-1431 847-297-0076 803-626-3123 978-442-4178 814-238-0490 847-297-7864
Note: Please indicate using MAX3510 when contacting these suppliers.
Quick Start
MAX3510 fully assembled factory tested. Follow instructions Connections Setup section. Note: output circuit contains series resistor that used bring load impedance This must accounted measurements (see Output Circuit section). Note: input transformer supplied allow differential input drive from single-ended source. transformer required application.
Test Equipment Required
supply capable delivering 5.5V 150mA continuous current. HP8648 equivalent signal source capable generating 40dBmV 200MHz. HP8561E equivalent spectrum analyzer with minimum 200MHz frequency range. Digital multimeter (DMM) monitor ICC, desired.
Maxim Integrated Products
free samples latest literature: http://www.maxim-ic.com, phone 1-800-998-8800. small orders, phone 1-800-835-8769.
MAX3510 Evaluation Evaluates: MAX3510
Lowpass filters attenuate harmonic output signal sources, harmonic measurements desired. Network analyzer, such HP8753D. (May used measure gain harmonic levels configured with this option; contact manufacturer.) compatible. Male-to-male 25-pin parallel cable, straight through. pulse generator (transient measurement). Low-noise amplifier with 40dB gain from 5MHz 100MHz (Noise Measurement). Oscilloscope with 200MHz bandwidth.
Table MAX3510 Software
DIRECTORY Windows Windows Windows FILE NAME MAX3510.BAS READ3510.TXT MAX3510.EXE MAX3510.DLL READWIN3510.TXT DESCRIPTION QuickBasic Source Code "Read Text File Windows Executable File Printer Port Control "Read Text File
Connections Setup
Connect power supply pins labeled circuit board. Connect signal source INPUT terminate OUTPUT with spectrum analyzer network analyzer having input impedance. using signal source with source impedance other than different input impedance required, sure replace resistor with appropriate value resistor. Connect 25-pin male-to-male cable between parallel (printer) port 25-pin female connector board. Ensure that shunts placed jumpers JU5, JU6, JU7. These shunts connect appropriate pins DB25 connector serial data interface MAX3510. Also check that pins jumper pins jumper shunted. Turn power supply. Turn test equipment. signal source -13dBm (34dBmV across load). software program.
your Windows installed, read file READWIN3510.TXT instructions operation MAX3510.EXE file. your does have Windows installed, program MAX3510.BAS. Instructions QuickBasic program found READ3510.TXT.
Gain Adjustment
Valid gain states range from nominal change gain gain state. Gain states exclusively programming SDI. MAX3510 data sheet details.
Shutdown Transmit Enable
Jumpers determine shutdown transmit-enable features controlled. each these jumpers connected directly device. external source (such modulator chip microprocessor) used control these features, simply make connection appropriate jumper. Pads provided bottom side board (R18 R19, respectively) placement termination resistors, needed. manual control shutdown transmit-enable desired, shunt pins jumper pins jumper JU3. This will allow SHDN TXEN controlled JU4, respectively. used place either ground SHDN TXEN. these jumpers ground +5V.
Detailed Description
Using Software
MAX3510 uses serial data interface (SDI) gain control software-shutdown mode. Some means communicating with required MAX3510 kit. microprocessor, pattern generator, used this function. Software included this facilitate disk included with MAX3510 contains programs. first QuickBasic® program that runs under second file that requires Windows run. disk contains directories (Table
Quick Basic Windows registered trademarks Microsoft Corp.
Manual Control Serial Data Interface
using source other than drive serial data interface MAX3510 (such digital pattern generator microprocessor), remove shunts jumpers JU5, JU6, JU7. Access serial data interface available through these jumpers. MAX3510 data sheet description serial data interface.
MAX3510 Evaluation
Input Circuit
input circuit MAX3510 configured with transformer (T2) 49.9 input resistor. This allows input driven with single-ended test equipment. transformer (T2) used generate differential signal, rated performance specified with differential input drive (typically from differential lowpass filter). Pads provided allow connection external differential drive. Additionally, pads provided pair termination resistors, needed (R16, R17). MAX3510 driven single-ended, input transformer (T2) must removed undriven input connected ground through 0.001µF blocking capacitor. 20MHz -13dBm. Adjust amplitude account insertion loss filter. Verify with spectrum analyzer that second third harmonics generated source suppressed least 70dBc. Connect filter between input output signal source, making sure proper terminations being used this particular filter. Connect spectrum analyzer OUTPUT. center frequency 40MHz span 50MHz more. Adjust reference level that fundamental (20MHz tone) within 10dB 20dB reference level. fundamental less than 10dB below reference level, harmonic distortion spectrum analyzer prevent accurate measurement distortion. gain state (approximately 16dB gain). Measure level fundamental, second, third harmonics spectrum analyzer. These readings have units dBm. convert from dBmV system, following equation: X(dBmV) Y(dBm) 47dB system) 3.5dB this value account voltage drop series resistor (R5), dBmV, load. gain calculated harmonic distortion calculated dBc.
Evaluates: MAX3510
Output Circuit
MAX3510 features differential open-collector output with output impedance approximately 300. This architecture aids suppressing 2nd-order distortion (harmonics). convert single-ended output match load, (voltage ratio) transformer (T1) used. Power supplied output stage through center this transformer. This feature essential reducing transients when switching between transmit transmit-disable mode. Since most test equipment supplied with termination impedance, series resistor provided output transformer increase load impedance nominal This places proper load device, will also reduce measured output voltage level 3.5dB. essential consider this when making measurements with kit. 3.5dB must added measurements voltage gain output voltage level (including noise) arrive correct value system. test equipment available take following steps: Remove output connector replace with connector. Remove (the series output resistor) replace with resistor some other type shunt. sure cable.
Switching Transients measure transmit transmit-disable transient, TXEN will driven from external source. input signal applied output viewed oscilloscope. Connect OUTPUT oscilloscope's input. scope's time base 5µs/div vertical scale 5mV/division.
pulse generator follows: Amplitude Duty Cycle Rise/Fall Time Pulse Width Offset 100ns 25µs 2.5V
Analysis
Harmonic Distortion filter will needed reject harmonics generated signal source. this example, lowpass filter with approximately 25MHz 35MHz cutoff frequency will required. This filter will need reject least 20dB signal 40MHz. signal source
Take care drive MAX3510 TXEN below above VCC. Turn power supply. Remove shunt from jumper (TXEN) connect output pulse generator this jumper. Trigger oscilloscope from pulse generator using convenient method. gain state
MAX3510 Evaluation Evaluates: MAX3510
rising falling edge transient should appear scope's CRT. peak amplitude this transient should less than 7mV. Multiply value measured transient 1.5, account presence resistor (R5). gain changed show output transient's dependence gain. spectrum analyzer being used does have noise marker function, corrections must made account bandwidth used make measurement. Consult user's manual your spectrum analyzer details. Once correction made, value read from spectrum analyzer converted noise density (dBm/Hz), above formula used. Noise measured various gains. Output noise transmit disable mode cannot measured.
Output Noise measure output noise, spectrum analyzer used. postamplifier with less than 10dB noise figure greater than 40dB gain within band interest needed. With power supply off, place termination input kit. Turn power supply MAX3510 kit. Using software, device transmit mode with gain state (approximately 16dB gain).
Connect output postamplifier spectrum analyzer input MAX3510 output. spectrum analyzer follows: Center Frequency Span Reference Scale Bandwidth Power postamplifier. spectrum analyzer being used noise marker function, enable output noise read directly from spectrum analyzer. Move this marker 42MHz. Read value noise density from spectrum analyzer. This noise value combination output noise MAX3510, gain postamp, noise figure postamp. With specified noise figure 10dB, noise contribution postamp ignored. Also series output resistor (R5) reduces actual measured value 3.5dB. following equation arrive MAX3510's output noise: VNOISE PNOISE 47dB 3.5dB (160,000) GAMP where: VNOISE MAX3510 output noise dBmV measured 160kHz bandwidth PNOISE Noise density dBm/Hz read from spectrum analyzer GAMP Gain postamplifier 35MHz 60MHz -50dBm 10dB/div 1kHz
Layout Considerations
MAX3510 evaluation board serve guide your board layout. Particular attention been paid output circuit prior transformer supply trace transformer. traces leading from output pins must short possible symmetrical reject second harmonics. Since device draw 120mA when swinging maximum signal, supply trace center transformer must wide practical minimize voltage drop. Ground inductance supply decoupling loop inductance degrade distortion performance. Returning supply decoupling capacitors pins directly pins respectively, recommended. Otherwise, multiple vias ground plane.
J2-7 J2-13 J2-10 J2-15 J2-6 VCC1 VCC1 VCC2 TX_EN CEXT1 VOUT+ VCC3 VINGND CEXT2 N.C. VOUTT2 OPEN OPEN J2-3 OPEN OPEN J2-5 SCLK SHDN 0.001µF 0.1µF 0.1µF 0.0033µF GND1 VIN+ 0.1µF 0.001µF OPEN GND2 0.1µF OPEN VCC2 VCC1 VCC2 VCC3 100k 100k
Figure MAX3510 Schematic MAX3510
OUTPUT J2-2 OPEN SHDN J2-4
10µF
0.1µF
J2-1
J2-3
J2-4
J2-11
J2-12
J2-14
J2-16
J2-17
OPEN OPEN OPEN OPEN OPEN INPUT OPEN 49.9 OPEN OPEN
J2-18
J2-9
J2-20
J2-21
J2-22
J2-23
J2-24
Evaluates: MAX3510
J2-25
MAX3510 Evaluation
MAX3510 Evaluation Evaluates: MAX3510
1.0"
1.0"
Figure MAX3510 Component Placement Guide- Component Side
Figure MAX3510 Component Placement Guide- Solder Side
1.0"
1.0"
Figure MAX3510 Board Layout-Component Side
Figure MAX3510 Board Layout-GND Plane
MAX3510 Evaluation Evaluates: MAX3510
1.0"
1.0"
Figure MAX3510 Board Layout-Power Plane
Figure MAX3510 Component Placement Guide- Solder Side
MAX3510 Evaluation Evaluates: MAX3510
NOTES
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 1999 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

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