19-1320; Rev 1; 3/98MAX2410 Evaluation Kit________________General Description____________________________FeaturesThe MAX2410 evaluation kit (EV kit) simplifies testing of theMAX2410.This EV kit allows evaluation of the MAX2410’so+2.7V to +5.5V Single-Supply Operation low-noise amplifier (LNA), receive downconvertero50ΩSMA Inputs and Outputs on RF and IF Portsmixer, transmit upconverter mixer, variable-gain power-amplifier (PA) driver, and power-management features.
oAllows Testing of Shutdown ModeoFully Assembled and Tested
____________________Component List_______________Ordering InformationDESIGNATIONQTY
DESCRIPTION
PARTTEMP. RANGEIC-PACKAGEC1, C2247pF ceramic capacitors, 0603 sizeMAX2410EVKIT-40°C to +85°C28 QSOPC3110µF tantalum capacitorAVX TAJC106K016
______________Component SuppliersC4, C5, C6, C84
0.1µF ceramic capacitors, 0805 size
SUPPLIERPHONEINTERNETC7, C10, C11,C16, C17,7220pF ceramic capacitors, 0805 size
AVX(803) 946-0690http://www.avxcorp.comC19, C20(803) 626-3123 FAXC9, C15, C18,51000pF ceramic capacitors, 0805 sizeCoilcraft(847) 639-00http://www.coilcraft.comC23, C24(847) 639-1469 FAXC12, C14,0Not installed
Taiyo Yuden(408) 573-4150C22, C25, C26
USA(408) 573-4159 FAXhttp://www.t-yuden.comC2111pF ceramic capacitor, 0805 sizeL1118nH inductor, 0805 sizeCoilcraft 0805CS-180XMBC_________________________Quick StartL215.6nH inductor, 0805 sizeThe MAX2410 EV kit is fully assembled and factory test-Taiyo Yuden HK16085N6Sed. Follow these instructions for initial evaluation of theMAX2410.
L3, L12268nH inductors, 0805 sizeCoilcraft 0805CS-680XKBCTest Equipment RequiredL4, L520Ωresistors, 0805 sizeThis section lists the recommended test equipment toL6, L7, L90Not installed
verify operation of the MAX2410. It is intended as aguide only, and some substitutions may be possible.L8, L1323.9nH inductors, 0805 sizeTaiyo Yuden HK16083N9S•Two RF signal generators capable of delivering atleast 0dBm of output power up to 2GHz (HP88C,L11182nH inductor, 0805 sizeor equivalent).
Coilcraft 0805CS-820XKBCR1, R2, R33
1kΩresistors, 0805 size
•An RF spectrum analyzer that covers the operatingfrequency range of the MAX2410 as well as a fewLNAIN,harmonics (HP8561E, for example).
LNAOUT, IFIN,IFOUT, LO,•A power supply which can provide up to 100mA atPADRIN,8SMA edge-mount connectors
+2.7V to +5.5V.
PADROUT,•A voltage source (0V to 5V) for adjusting the gain-TXMXOUTcontrol (GC) voltage on the PA driver.
RXMXIN1SMA PC-mount connector•An optional ammeter for measuring the supply cur-RXEN, TXEN,
VGC33-pin headersrent.
•Several 50ΩSMA cables.
VCC, GND
22-pin headers
U1
1
MAX2410EEI 28-pin QSOP
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For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.Evaluates: MAX2410元器件交易网www.cecb2b.com
MAX2410 Evaluation KitEvaluates: MAX2410Connections and SetupThis section provides a step-by-step guide to operatingthe EV kit and testing all four major functions: the LNA,receive mixer, transmit mixer, and PA driver. Do notturn on the DC power or RF signal generators untilall connections are made.1)
5)Connect the spectrum analyzer to the IFOUT SMA
connector. Set the spectrum analyzer to a 400MHzcenter frequency, a 200MHz total span, and a0dBm reference level.6)Turn on the DC supply, LO signal generator, and RF
input signal generator. 7)The downconverted output signal at 400MHz is visi-ble on the spectrum analyzer, indicating a mixerconversion gain of typically 8.3dB after accountingfor cable losses.1)
2)
3)
4)
5)6)
7)
Low-Noise AmplifierSet the RXEN jumper on the EV kit to the “Logic 1”position and the TXEN jumper to the “Logic 0” posi-tion. This enables the MAX2410’s receive mode. Connect a DC supply set to 3V (through an amme-ter if desired) to the VCCand GND terminals on theEV kit. Do not turn on the supply.
Connect one RF signal generator to the LNAIN SMAconnector; do not turn on the generator’s output.Set the generator for an output frequency of 1.9GHzat a power level of -40dBm.
Connect a spectrum analyzer to the LNAOUT SMAconnector on the EV kit. Set it to a center frequencyof 1.9GHz, a total span of 200MHz, and a referencelevel of 0dBm.
Turn on the DC supply. The supply current shouldread approximately 20mA (if using an ammeter).Activate the RF generator’s output. A signal on thespectrum analyzer’s display should indicate a typi-cal gain of 16.2dB after accounting for cable losses.If desired, the shutdown feature can be tested bymoving the RXEN jumper into the “Logic 0” position.The supply current should drop to less than 10µA.Receive Downconverter MixerRemove the RF signal generator and spectrum ana-lyzer from the LNAIN and LNAOUT connections ifnecessary. The DC supply connections needed fortesting the downconverter mixer are the same as inthe LNA section. Turn off the DC supply while mak-ing connections.
Set the RXEN jumper on the EV kit to the “Logic 1”position and the TXEN jumper to the “Logic 0” posi-tion. This enables the MAX2410’s receive mode. Connect one RF signal generator (with the outputdisabled) to the LO SMA connector. Set the fre-quency to 1.5GHz and the output power to -10dBm.This is the LO signal.
Connect the other RF signal generator to the RXMXINSMA connector (with the output disabled). Set thefrequency to 1.9GHz and the output power to -30dBm. This is the RF input signal.
2)
3)
4)
5)
6)7)
1)
8)
Power-Amplifier DriverRemove any RF signal connections made in theabove tests. The VCCand GND connections shouldremain as before. Turn off the VCCsupply whilemaking connections.
Set the RXEN jumper to the “Logic 0” position andthe TXEN jumper to the “Logic 1” position. Thisenables the MAX2410’s transmit mode.
Set the voltage source to be used for the gain-con-trol voltage to 2.15V, and turn it off. Connect it to themiddle pin of the VGCjumper on the EV kit.
Connect an RF signal generator set to 1.9GHz, at apower level of -10dBm with the output disabled, tothe PADRIN SMA connector.
Connect the PADROUT SMA connector to the spec-trum analyzer. Configure the analyzer to a centerfrequency of 1.9GHz, a reference level of +10dBm,and 200MHz total span.
Turn on the DC supply, VGCvoltage source, and RFsignal generator.
The supply current should read typically 30mA. A1.9GHz signal should be visible on the spectrumanalyzer’s display indicating a typical gain of 15dBafter accounting for cable losses.
Lowering the voltage on the VGCvoltage source to0V should reduce the gain by typically 35dB.
2)
3)
4)
Transmit Upconverter Mixer1)Remove any RF signal connections made in the
above tests. The VCCand GND connections shouldremain as before. Turn off the VCCsupply. The VGCvoltage source is not needed for this test.
2)Set the RXEN jumper to the “Logic 0” position and
the TXEN jumper to the “Logic 1” position. Thisenables the MAX2410’s transmit mode.
3)Connect one RF signal generator (with the output
disabled) to the LO SMA connector. Set the fre-quency to 1.5GHz and the output power to -10dBm.This is the LO signal.
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MAX2410 Evaluation Kit4)Connect the other RF signal generator (with the out-put disabled) to the IFIN SMA connector. Set thegenerator to a frequency of 400MHz and a powerlevel of -32dBm. This is the IF signal.
5)Connect the TXMXOUT SMA connector to the spec-trum analyzer. Configure the analyzer for a centerfrequency of 1.9GHz, a reference level of 0dBm,and 200MHz total span.
6)Turn on the DC supply, LO signal generator, and IF
signal generator.7)The supply current should typically read 30mA. The
spectrum analyzer should show a 1.9GHz signalindicating a conversion gain of typically 10dB afteraccounting for cable losses. 8)To observe the remainder of the TX mixer output
spectrum, increase the span on the spectrum ana-lyzer from 200MHz to 2GHz.
PA Driver AmplifierThe PA driver amplifier input is internally matched to50Ωfor 1.9GHz operation. Capacitor C11 is necessaryfor DC blocking. The gain of the PA driver is adjustableby applying a voltage on the middle pin of the VGCjumper, which is connected through a 1kΩresistor (R3)to the GC pin of the MAX2410. C8 and R3 form a filterto reduce any noise from the VGCsupply. Alternatively,by inserting a shunt, it is possible to set this voltage toground or VCC. The position labeled “Logic 0” is con-nected to ground, and the “Logic 1” position is set toVCC.
IF InputThe IFIN pin of the MAX2410 is a high-impedance inputthat is internally biased. Inductor L11 provides a simplematching network. C23 is used for DC blocking. As withthe IFOUT pin above, additional component footprintshave been placed to allow further experimentation:C14, C25, L4, L6, and L7.
Evaluates: MAX2410_______________Detailed DescriptionThe MAX2410 EV kit circuitry is described in this sec-TX Mixer Outputtion. For more detailed information about the operationof the device itself, please consult the MAX2410 dataThe transmit mixer output appears on the TXMXOUTsheet.
pin, which requires a pull-up inductor (L2) to VCCaswell as a matching network to a 50Ωload impedanceReceiverconsisting of inductors L2 and L13. C19 serves as aThis section describes the LNA and receive mixer sec-DC block.
tions of the MAX2410 EV kit.
Local OscillatorLow-Noise AmplifierThe MAX2410 EV kit’s LO input only requires a DCThe LNA circuitry consists of two DC blocking capaci-blocking capacitor (C20). No other circuitry is required.tors, one at the input (C7) and one at the output (C17).For more information on the LO port, including theA shunt capacitor (C21) is used as a simple inputoptional use of a differential LO source, consult thematching network.
MAX2410 data sheet.
IF Output________________Power ManagementThe IFOUT pin of the MAX2410 is an open-collectorThe RXEN and TXEN jumpers on the EV kit control theoutput that is externally biased to VCCby inductor L3operating modes of the MAX2410. Refer to theand matched with inductors L3 and L12. C24 providesMAX2410 data sheet for a table of operating modes.DC blocking. There are additional component footprintsSeries resistors R1 and R2 and capacitors C5 and C6available on the EV kit layout for designing a more com-are included on the RXEN and TXEN inputs to provideplex matching network: C12, C26, L5, and L9.
filtering between logic and RF circuitry.
RX Mixer Input______________________________LayoutThe receive mixer’s input, RXMXIN, requires a simpleA good PC board is an essential part of an RF circuitmatching network. Capacitor C16 provides DC block-design. The EV kit PC board can serve as a guide foring, and L8 is used to match the input pin to 50Ω.laying out a board using the MAX2410.
Component footprint (C22) is available for additionalmatching network prototyping.
Each Vdecoupling capacitor. This minimizes supply couplingCCnode on the PC board should have its ownTransmitterfrom one section of the MAX2410 to another. A starThis section describes the PA driver and transmit mixertopology for the supply layout, in which each VCCnodesections of the MAX2410 EV kit.
on the MAX2410 circuit has a separate connection to acentral VCCnode, can further minimize couplingbetween sections of the MAX2410 (Figure 5).
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MAX2410 Evaluation KitEvaluates: MAX2410LNAOUTSMAL83.9nHC22OPENC16220pFC17220pF271C7220pFLNAINSMAC211pF234VCC5C147pFC20220pFLOSMA7LOVCCGNDLNAINGNDGNDLNAOUTRXMXINSMAGNDRXMXINIFIN28242226L1182nHC14OPENL4SHORTC231000pFC25OPENIFINSMAL7OPENGNDL6OPENMAX2410GND25VCCC151000pFL368nHL1268nH8VCC10C247pF1214VCCLOVCCGNDGNDIFOUTGND2123L5SHORTC12OPENVCCC241000pFC26OPENL9OPENIFOUTSMAGNDC91000pFTXMXOUT13C10220pFVCCLOGIC 1JU3VCCJU2VCCJU1R11kTXENRXENR21kR31kC60.1µFC80.1µFC50.1µFPADROUTRXENTXEN69GC11GND15GND17PADRINGND1820C181000pFL118nHPADROUTSMAL25.6nH1916C11220pFPADRINSMAL133.9nHC19220pFTXMXOUTSMAVCCVCCGNDC310µFC40.1µFLOGIC 0VGCFigure 1. MAX2410 EV Kit Schematic 4
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MAX2410 Evaluation Kit1.0\"1.0\"Figure 2. MAX2410 EV Kit Component Placement GuideFigure 3. MAX2410 EV Kit PC Board Layout—Component Side_______________________________________________________________________________________5
Evaluates: MAX2410元器件交易网www.cecb2b.com
MAX2410 Evaluation KitEvaluates: MAX24101.0\"1.0\"Figure 4. MAX2410 EV Kit PC Board Layout—Ground PlaneFigure 5. MAX2410 EV Kit PC Board Layout—Solder Side6_______________________________________________________________________________________
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MAX2410 Evaluation KitNOTES
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Evaluates: MAX2410元器件交易网www.cecb2b.com
MAX2410 Evaluation KitEvaluates: MAX2410NOTES
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses areimplied. Maxim reserves the right to change the circuitry and specifications without notice at any time.8_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©1998 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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