MAX3507 Evaluation MAX3507 evaluation kit) simplifies evaluation

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MAX3507 Evaluation MAX3507 evaluation kit) simplifies evaluation

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19-2092; 7/01
MAX3507 Evaluation
MAX3507 evaluation kit) simplifies evaluation MAX3507 CATV upstream amplifier. Each includes data interface that programmed through parallel port standard Software (Windows® 95/98 compatible) included facilitate this function. This software allows programming available features through simple user interface. Access device input output provided through connectors. input matched output circuit includes minimum-loss that presents load output transformer when using test equipment. Single-Supply Operation Output Level Range +64dBmV (QPSK) Gain Programmable 0.5dB Steps Transmit Disable Mode Shutdown Mode Control Software Included Fully Assembled Tested Surface-Mount Board
Features
Evaluates: MAX3507
Ordering Information
PART MAX3507EVKIT TEMP. RANGE -40°C +85°C PACKAGE
Component List
DESIGNATION B3-B6 C8-C11 DESCRIPTION Murata BLM21A601RPT 0.1µF ±10% ceramic capacitors (0603) Murata GRM39X7R104K016A 1000pF ±10% ceramic capacitors (0603) Murata GRM39X7R102K050A Leave site open 10µF ±10% tantalum capacitor TAJC106K016 Test points Digi-Key 5000K-ND connector (PC-mount) Johnson 142-0701-201 Digi-Key J500-ND DB25 connector, right angle, female Digi-Key A2102-ND 745783-4 connector (edge-mount) Johnson 142-0701-801 Digi-Key J502-ND headers (0.1in centers) Digi-Key S1012-36-ND DESIGNATION JU1-JU7 L2-L5 R1-R4, R6-R13, R18-R20 R14, None None None DESCRIPTION Shunts Digi-Key S9000-ND resistor (0805) resistors (0603) Leave site open 43.2 resistor (0805) 100k resistors (0603) 49.9 resistor (0603) 86.6 resistor (0805) resistor (0603) Transformer M/A-COM ETC1-1T Transformer voltage ratio Toko 458PT-1087 MAX3507EGI 28-pin MAX3507 circuit board, MAX3507 data sheet MAX3507 data sheet
C12-C17
IN1,
JU1-JU7
Windows registered trademark Microsoft Corp. Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
MAX3507 Evaluation Evaluates: MAX3507
Component Suppliers
SUPPLIER Digi-Key Johnson M/A-COM Murata Toko PHONE 843-448-9411 800-344-4539 800-328-3911 978-442-5000 800-831-9172 800-745-8656 843-448-1943 218-681-3380 507-835-6969 978-442-4178 814-238-0490 708-699-1194 WEBSITE www.avxcorp.com www.digikey.com www.efjohnson.com www.macom.com www.murata.com www.tokoam.com
Quick Start
MAX3507 fully assembled factory tested. Follow instructions Connections Setup section. Note that output circuit includes minimum-loss that used bring output impedance This must accounted measurements (see Output Circuit section). Also note, input balun supplied allow differential input drive from single-ended source. balun required application.
Low-noise amplifier with 40dB gain from 5MHz 100MHz noise measurement Oscilloscope with 200MHz bandwidth Network analyzer, such 8753D. (May used measure gain frequency)
Connections Setup
Connect power supply (preset +5V) pins labeled circuit board. Connect signal source INPUT (preset signal source -13dBm (+34dBmV across load)), terminate OUTPUT with spectrum analyzer. using signal source with source impedance other than different input impedance required, sure replace with appropriate value resistor. Connect 25-pin male-to-male cable between parallel (printer) port 25-pin female connector board. Table board jumper settings. jumpers port control, unless otherwise stated. Turn power supply. Turn test equipment. software program.
Test Equipment Required
supply capable delivering +5.5V 400mA continuous current 8648 equivalent) signal source capable generating 40dBmV 200MHz 8561E equivalent) spectrum analyzer with minimum 200MHz frequency range digital multimeters (DMMs) monitor ICC, desired compatible with Windows 95/98 installed Male-to-male 25-pin parallel cable, wired straight through pulse generator transient measurement
Table Jumper Setting Functions
JUMPER FUNCTION method control SHDN manual control state SHDN method control TXEN manual control state TXEN input input SCLK input SHORT PIN1 PIN2 port control Logic state (VCC) port control Logic state (VCC) port control port control port control SHORT PIN2 PIN3 Manual control through Logic state (GND) Manual control through Logic state (GND)
MAX3507 Evaluation
Detailed Description
Using Software
MAX3507 uses serial data interface (SDI) gain. Some method communicating with required MAX3507 kit. microprocessor, pattern generator, used this function. Software supporting documentation programming part through parallel port found valid gain code ranges from (decimal). nominal change gain 0.5dB gain code. Gain codes exclusively programming SDI. Refer MAX3507 data sheet details. R4). Solder appropriate resistor these pads, desired. Refer MAX3507 data sheet description serial data interface. control using supplied software, shunt pins JU5, JU6, together.
Evaluates: MAX3507
Input Circuit
input circuit MAX3507 configured with balun, terminated (T1). This allows input driven with single-ended test equipment. balun used generate differential signal, rated performance specified with differential input drive. MAX3507 itself driven single ended, input balun must removed undriven input connected ground through 0.1µF blocking capacitor.
High Power Noise
High-power (HP) mode low-noise (LN) mode only controlled through interface. Manual control jumpers kit's board possible. DOCSIS applications, mode should used output levels above 42dBmV. This corresponds gain code mode should used below this output level. This corresponds gain code 109. transition from mode, gain code mode, gain code 107, results -1dB step.
Output Circuit
MAX3507 differential outputs. This architecture aids suppressing second-order distortion (harmonics). convert single-ended output, transformer (T2) used. Since most test equipment supplied with input impedance, minimum-loss provided output transformer increase load impedance nominal This places proper load device, also reduces measured output voltage level 7.5dB. essential consider this when making measurements with kit; 7.5dB 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 replace with resistor some other type shunt. Remove R21. sure cable.
Shutdown Transmit Enable
through determine shutdown transmit enable features controlled. connected directly device. external source (such modulator chip microprocessor) used control these features, make connection JU3. Pads provided bottom side board (R18 R19, respectively) placement termination resistors, needed. manual control shutdown transmit enable desired, shunt pins JU3. This allows SHDN TXEN controlled JU4, respectively. used place either ground SHDN TXEN. ground, VCC. control SHDN TXEN features through supplied software, shunt pins JU3.
Analysis
Harmonic Distortion signal source 20MHz -13dBm. Verify that second third harmonics generated source suppressed least 60dBc. Filters usually required achieve these harmonic levels. Connect spectrum analyzer OUTPUT. center frequency 40MHz span 50MHz more. Adjust reference level that fundamen-
Manual Control Serial Data Interface (SDI)
using source other than bang MAX3507 (such digital pattern generator microprocessor), shunt pins jumpers JU5, JU6, JU7. Access available through these jumpers. Termination pads provided (R2,
MAX3507 Evaluation Evaluates: MAX3507
(20MHz tone) within 10dB 20dB reference level. fundamental less than 10dB below reference level, harmonic distortion spectrum analyzer prevent accurate measurement distortion. necessary, manual attenuation setting ensure least 20dB input attenuation. gain code 125, (approximately 30dB 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) 7.5dB this value account attenuation minimum-loss dBmV. gain calculated harmonic distortion calculated dBc. harmonic distortion should approximately 55dBc. Switching Transients measure transmit enable transmit disable transients, TXEN driven from external source. input signal applied, output viewed oscilloscope. Connect OUTPUT oscilloscope's input. scope's time base 5µs/div vertical scale 5mV/div. pulse generator follows: Amplitude: Duty Cycle: Rise/Fall Time: 100ns Pulse Width: 25µs Offset: 2.5V Take care drive MAX3507 TXEN below zero above +5V. Turn power supply. Remove shunt from jumper (TXEN), connect output pulse generator this jumper. Trigger oscilloscope from pulse generator using convenient method. gain code 119, rising- falling-edge transient should appear scope's CRT. amplitude this transient should less than 40mVp-p. Multiply value measured transient 2.37 account presence minimum-loss pad. gain changed show output transient's dependence gain. 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 MAX3507 kit. Using software, device transmit mode with gain code 119, Connect output postamplifier spectrum analyzer input OUTPUT kit. spectrum analyzer follows: Center Frequency: 35MHz Span: 60MHz Reference: -50dBm Scale: 10dB/div Bandwidth: 1kHz Power postamplifier spectrum analyzer being used noise marker function, enable Otherwise, sure divide measured power 10log (RBW). Move this marker 42MHz. Read value noise density from spectrum analyzer. This noise value combination output noise MAX3507, gain postamplifier, noise figure postamplifier. With specified noise figure 10dB, noise contribution postamplifier ignored. minimum-loss reduces actual measured value 7.5dB. following equation arrive MAX3507's output noise 160kHz bandwidth: VNOISE PNOISE 47dB 7.5dB (160,000) GAMP where: VNOISE MAX3507 output noise dBmV measured 160kHz bandwidth PNOISE Noise density dBm/Hz read from spectrum analyzer GAMP Gain postamplifier
Layout Considerations
MAX3507 evaluation board serve guide your board layout. Particular attention should paid thermal design output network. output circuit that connects OUT- OUT+ (pins output transformer (T2) should symmetrical possible reduce second-order distortion. addition, capacitance this path should kept minimize gain roll-off high frequencies.
BLM21A601RPT VCC1 BLM21A601RPT VCC2 J2-7 VCC3 OPEN 100k J2-15 OPEN OPEN VCC2 TXEN VEE6 VCC2 J2-6 VCC1
BLM21A601RPT
10µF
0.1µF
100k J2-13
J2-10
J2-1 OPEN 0.1µF 0.1µF OPEN
VEE1
J2-11 OPEN BIASF TXEN VCC3 N.C. 0.1µF VOUTP VOUTN OPEN OPEN
J2-12
J2-14 OPEN
VCC1
N.C.
VEE3B
SCLK
VEE5
N.C.
SHDNB
Figure MAX3507 Schematic
OPEN XFMRMINICIRCUIT 0.1µF N.C. 43.2 OUTPUT
J2-8
J2-9
J2-16
OPEN VEE3A
86.6
INPUT
OPEN VCC1 1000pF OPEN 49.9 1000pF OPEN 0.1µF
J2-17
MAX3507
BLM21A601RPT
OPEN
OPEN
OPEN
CEXT 0.1µF N.C.
SHDN
OPEN
XFMRMINICIRCUIT
J2-5
J2-18 J2-2 OPEN
J2-19
J2-20
J2-21 J2-3
J2-22
J2-23 J2-4 OPEN OPEN OPEN
J2-24
Evaluates: MAX3507
J2-25
MAX3507 Evaluation
MAX3507 Evaluation Evaluates: MAX3507
1.0"
1.0"
Figure MAX3507 Component Placement Guide- Component Side
Figure MAX3507 Board Layout-Solder Side
1.0"
Figure MAX3507 Board Layout-Component Side
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 2001 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

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