MAX3503/MAX3505 Evaluation Kits MAX3503/MAX3505 evaluation kits k

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MAX3503/MAX3505 Evaluation Kits MAX3503/MAX3505 evaluation kits k

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19-2504; 7/02
MAX3503/MAX3505 Evaluation Kits
MAX3503/MAX3505 evaluation kits kits) simplify evaluation MAX3503 MAX3505 CATV upstream amplifiers. kits include data interface that programmed through parallel port standard Software (Windows 95/98® compatible) available facilitate this function. This software allows programming available features through simple user interface. Access device input output provided through connectors. input terminated with output circuit includes minimum-loss with equipment.
Features
Single-Supply Operation Output Level Range 64dBmV (MAX3505) Gain Programmable 0.5dB Steps Transmit-Disable Mode Shutdown Mode Control Software Available Download Fully Assembled Tested Surface-Mount Board
Evaluate: MAX3503/MAX3505
Ordering Information
PART MAX3503EVKIT MAX3505EVKIT TEMP RANGE -40°C +85°C -40°C +85°C PACKAGE
Windows 95/98 registered trademark Microsoft Corp.
Component List
DESIGNATION B1-B5 C2-C5, DESCRIPTION resistors (0805) 10µF ±10%, tantalum capacitor TAJC106K016 0.1µF ±10% ceramic capacitors (0603) Murata GRM188R71C104K 1000pF ±10% ceramic capacitors (0603) Murata GRM188R71H102K Open 100pF ±10% ceramic capacitors (0603) Murata GRM1885C1H101K connector, mount EFJohnson 142-0701-201 Digi-Key J500-ND DB25 connector, right angle, female Digi-Key A2102-ND 745783-4 connector, edge mount EFJohnson 142-0701-801 Digi-Key J502-ND Note: center approximately 1/16in length. 3-pin headers, 0.1in centers Digi-Key S1012-36-ND Shunts Digi-Key S9000-ND DESIGNATION R14, R16, R17, R19, R25, R26, R27, R29, R7-R13, R15, R20-R24 R18, VCC, GND, TP1, IN1, None None None DESCRIPTION resistor (0805) 49.9_±1% resistor (0402) 86.6 resistor (0805) 43.2 resistor (0805)
C10-C14, C16-C21
Open
resistors (0603) 100k resistors (0603) Transformer, ETC1-1T Transformer, Toko 458PT-1457 MAX3503EGP QFN20 MAX3505EGP QFN20 Octal buffer Texas Instruments SN74LVTH244ADBR Test points Digi-Key 5000K-ND MAX3503/MAX3505 circuit board, MAX3503 data sheet MAX3505 data sheet MAX3503/MAX3505 kits data sheet
JU1-JU8 JU1-JU8
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
MAX3503/MAX3505 Evaluation Kits Evaluate: MAX3503/MAX3505
Component Suppliers
SUPPLIER M/A-COM Murata Toko PHONE 843-448-9411 978-442-5000 814-237-1431 800-745-8656 843-448-1943 978-442-4178 814-238-0490 WEBSITE www.avxcorp.com www.macom.com www.murata.com www.tokoam.com
Table Jumper Setting Functions
JUMPER port buffer input SCLK input input Sets method control TXEN Sets manual control state TXEN Sets method control SHDN Sets manual control state SHDN FUNCTION SHORT PIN1 PIN2 Disabled port control port control port control port control Logic state (VCC) port control Logic state (VCC) SHORT PIN2 PIN3 Enabled Manual control through Logic state (GND) Manual control through Logic state (GND)
Quick Start
MAX3503/MAX3505 kits fully assembled factory tested. Follow instructions Connections Setup section. Note that output circuit includes minimum-loss used bring load impedance This must accounted measurements (see Output Circuit section). Also note that input transformer supplied allow differential input drive from single-ended source. This transformer required application.
Low-noise amplifier with 40dB gain from 5MHz 100MHz noise measurement Oscilloscope with 200MHz bandwidth Network analyzer, such 8753D, which used measure gain frequency.
Connections Setup
Connect power supply (preset 3.3V MAX3503 MAX3505) pins labeled circuit board. Connect signal source INPUT (preset signal source -13dBm (34dBmV across load)), terminate OUTPUT with spectrum analyzer input impedance. using signal source with source impedance other than different input impedance required, replace resistor (R1) with resistor appropriate value. Connect 25-pin male-to-male cable between parallel port 25-pin female connector board. Table board jumper settings. jumpers enable port control, unless otherwise stated. Turn power supply. Turn test equipment. software program.
Test Equipment Required
supply capable delivering 5.25V 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 Lowpass filters attenuate harmonic output signal sources, harmonic measurements desired compatible with Windows 95/98 installed Male-to-male 25-pin parallel cable, wired straight through 3.3V pulse generator transient measurement
MAX3503/MAX3505 Evaluation Kits
Detailed Description
Using Software
MAX3503/MAX3505 serial data interface (SDI) gain. Some method communicating with required MAX3503/MAX3505 kits. microprocessor, pattern generator, used. Software supporting documentation programming part through parallel port available input resistor. This allows input driven with single-ended test equipment. balun generates differential signal, because rated performance specified with differential input drive, typically from differential lowpass filter. MAX3503 MAX3505 driven single ended, input balun must removed undriven input connected ground through 0.1µF blocking capacitor.
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Output Circuit
MAX3503 MAX3505 have differential outputs. This architecture helps suppress second-order distortion (harmonics). convert single-ended output, transformer (T2) used. Because most test equipment supplied with input impedance, minimum-loss provided output transformer increase load impedance nominal This places proper load device reduces measured output voltage level 7.5dB. Note: When making measurements with kits, 7.5dB measurements voltage gain output voltage level, including noise, arrive correct value system. with test equipment: Remove output connector replace with connector. Remove replace with resistor lowinductance short. Remove cable.
Gain Adjustment
valid gain codes (decimal). nominal change gain 0.5dB gain code. Gain codes exclusively programming SDI. Highpower (HP) mode low-noise (LN) mode controlled only through interface. Refer MAX3503 MAX3505 data sheet details.
Shutdown Transmit Enable
Jumpers through determine shutdown transmit-enable features controlled. connected directly device. external source, such modulator chip microprocessor, used control these features, make connection JU7. manual control shutdown transmit enable desired, shunt pins jumper pins jumper JU7. This allows TXEN SHDN controlled JU8, respectively. used place either ground SHDN TXEN. ground, VCC. control TXEN SHDN features using software, shunt JU7.
Analysis
Harmonic Distortion filter needed reject harmonics generated signal source. this example, lowpass filter with approximate 25MHz 35MHz cutoff frequency required. This filter must reject least 20dB signal 40MHz. signal source 20MHz -13dBm. Adjust amplitude account insertion loss filter. With spectrum analyzer, verify that second third harmonics generated source suppressed least 70dBc.
Manual Control Serial Data Interface
using source other than control serial data interface (SDI) MAX3503/MAX3505 kits, such digital pattern generator microprocessor, remove shunts jumpers JU2, JU3, JU4. Access available through these jumpers. Termination pads provided (R4, R6). Solder appropriate resistor these pads, desired. Refer MAX3503 MAX3505 data sheet description SDI. control using software, shunt JU2, JU3, JU4.
Input Circuit
input circuits MAX3503/MAX3505 kits configured with balun, terminated with 49.9
MAX3503/MAX3505 Evaluation Kits Evaluate: MAX3503/MAX3505
Connect filter between INPUT output signal source, ensuring that proper terminations being used this filter. Connect spectrum analyzer OUTPUT. center frequency 40MHz span 50MHz greater. Adjust reference level that fundamental (20MHz tone) within 10dB 20dB reference level. fundamental less than 10dB below reference level, harmonic distortion spectrum analyzer might prevent accurate measurement distortion. gain 27dB. (Refer MAX3503 MAX3505 data sheet details.) Measure level fundamental, second, third harmonics spectrum analyzer. These readings measured dBm. convert from dBmV system, following equation: X(dBmV) Y(dBm) 47dB system) 7.5dB this value account attenuation minimum-loss pad, dBmV, load. gain calculated harmonic distortion calculated dBc. 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: 3.3V Duty cycle: Rise/fall time: 100ns Pulse width: 25µs Offset: 1.65V drive TXEN below above 3.6V. Turn power supply. Remove shunt from jumper (TXEN), connect output pulse generator this jumper. VNOISE PNOISE 47dB 7.5dB (160,000) GAMP Using convenient method, trigger oscilloscope from pulse generator rising- falling-edge transient should appear scope's CRT. Multiply value measured transient 2.37 account presence minimum-loss pad. gain changed show output transient's dependence gain. Output Noise spectrum analyzer measure output noise. postamplifier with less than 10dB noise figure greater than 40dB gain within band interest needed. Turn power supply. Terminate input with Using software, device transmit mode with approximately 27dB gain. Connect output postamplifier spectrum analyzer input OUTPUT kits. 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, subtract 10log (RBW) from measured power. Move this marker 42MHz. Read value noise density from spectrum analyzer. This noise value combination output noise MAX3503 MAX3505, 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 output noise 160kHz bandwidth:
MAX3503/MAX3505 Evaluation Kits
where: VNOISE MAX3503/MAX3505 output noise dBmV measured 160kHz bandwidth PNOISE Noise density dBm/Hz read from spectrum analyzer GAMP Gain postamplifier electrical connection. must attached board ground plane with thermal electrical impedance contact. Ideally, this provided soldering backside package contact directly metal ground plane board. Alternatively, connected ground plane using array plated vias directly below output circuit that connects OUT+ OUT- (pins output transformer (T2) should symmetrical possible reduce second-order distortion. addition, keep capacitance this path minimize gain rolloff high frequencies.
Evaluate: MAX3503/MAX3505
Layout Considerations
MAX3503/MAX3505 kits' board guide board layout. close attention thermal design output network. MAX3503/ MAX3505 package exposed paddle (EP) conducts heat part provides low-impedance
Functional Diagram
TXEN SHDN
BIAS CONTROL
MAX3503 MAX3505
HIGH POWER
OUTCEXT
OUT+
INLOW NOISE
CONVERTER
SERIAL DATA INTERFACE
SCLK
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MAX3503/MAX3505 Evaluation Kits
Figure MAX3503/MAX3505 Kits Schematic
J2-13 J2-7 100k VCC1 J2-15 VCC2 VCC1 VCC3 VCC4 0.1µF VCC3 OUT+ IN11 0.1µF OUTC9 0.1µF 458PT-1457 OPEN IND0805 43.2 OUTPUT N.C. N.C. N.C. N.C. CEXT 0.1µF VCC2 100k J2-10
INPUT 49.9 1000pF N.C. M/A-COM ETC1-1T 1000pF
10µF
0.1µF
MAX3503 MAX3505
86.6
SCLK TXEN SHDN N.C.
VCC4 100pF VCC4 0.1µF 100pF J2-1 100pF J2-11 SCLK J2-14 J2-8 100pF J2-17 OPEN VCC4 TXEN J2-5 100pF 100pF OPEN OPEN OPEN
100pF
J2-2
J2-18 OPEN J2-19 OPEN J2-9 OPEN J2-21 OPEN J2-12 OPEN J2-23 OPEN J2-16 OPEN J2-25 J2-24 J2-22 J2-20
100pF
J2-3
SN74LVT244A
100pF
J2-4
100pF
J2-6
100pF
VCC4 SHDN
OPEN
MAX3503/MAX3505 Evaluation Kits Evaluate: MAX3503/MAX3505
1.0"
Figure MAX3503/MAX3505 Kits Component Placement Guide-Component Side
MAX3503/MAX3505 Evaluation Kits Evaluate: MAX3503/MAX3505
1.0"
1.0"
Figure MAX3503/MAX3505 Kits Board Layout- Solder Side
Figure MAX3503/MAX3505 Kits 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 2002 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

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