MAX2740 Evaluation MAX2740 evaluation kit) simplifies testing MAX

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MAX2740 Evaluation MAX2740 evaluation kit) simplifies testing MAX

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MAX2740 Evaluation
MAX2740 evaluation kit) simplifies testing MAX2740 receiver. This allows evaluation device's LNA, mixers, variable gain amplifier (VGA), fixed gain amplifier, voltage-controlled oscillator (VCO), synthesizer. provides connectors signal inputs outputs. varactor-based tank circuit provided on-chip phase locked with on-chip phase-locked loop (PLL). Differential Baseband Outputs +2.7V +3.3V Single-Supply Operation Connectors Signal Ports
Features
Evaluates: MAX2740
Ordering Information
PART MAX2740EVKIT TEMP.RANGE -40°C +85°C PACKAGE TQFP-EP*
*Exposed Paddle
Component List
DESIGNATION C10, C14, C18, C20, C21, C32, C33, C35, C36, C37, C38, DESCRIPTION 10µF ±10% tantalum capacitor TAJC106K016R 1000pF ±10% ceramic capacitors (0402) Murata GRM36X7R102K050A 12pF ceramic capacitor (0402) Murata GRM36COG120J050A 0.015µF ±10% ceramic capacitors (0402) Murata GRMX5R153K016A 100pF ceramic capacitors (0402) Murata GRM36COG101J050A ±0.1pF ceramic capacitor (0402) Murata GRM36COG070B050A Leave sites open DESIGNATION DESCRIPTION 2.7pF ±0.1pF ceramic capacitor (0402) Murata GRM36COG2R7B050A ±0.1pF ceramic capacitor (0402) Murata GRM36COG030B050A ±0.1pF ceramic capacitor (0402) Murata GRM36COG020B050A 51-03W Siemens tuning diode variable resistor Bourns 3796W Digi-Key resistors (0402) 12.1k resistors (0402) 2.74k resistors (0402) 1.21k resistors (0402) resistors (0402) resistor (0402) resistor (0402) 220nH inductors Toko LL1608-FSR22J 8.2nH inductors Toko LL1608-FH8N2K Leave site open 1.8nH inductor Murata LQP10A1N8B00 resistors (0603)
C16, C22-C31, C13, C15, C17, C19,
R11, R13-R18 L11,
C12, C41, C45, C46,
Maxim Integrated Products
free samples latest literature, visit www.maxim-ic.com phone 1-800-998-8800. small orders, phone 1-800-835-8769.
MAX2740 Evaluation Evaluates: MAX2740
Component List (continued)
DESIGNATION J3-J22 JU1-JU4, JU7, JU8, VCC, DESCRIPTION MAX2740ECM 48-pin TQFP-EP* MAX4122EUK SOT23-5 connectors mount) Johnson 142-0701-201 Digi-Key J500-ND 2-pin headers Test points Digi-Key 5000K-ND MAX2740 circuit board, Rev. MAX2740 data sheet Power Supply Spectrum Analyzer Balun Extra Voltage Source Signal Generators
Table Recommended Test Equipment
EQUIPMENT DESCRIPTION 8648C equivalent 83712A equivalent. These should capable delivering -70dBm 0dBm output power 10MHz 2000MHz frequency range. 8648C required test receive signal path, 83712A low-phase noise source reference frequency. Capable providing least 100mA +2.7V +3.3V 8561E Anzac 96341 external control functions
*Note: exposed paddle that requires solder attached circuit board ensure proper functionality part.
Component Suppliers
SUPPLIER Coilcraft Digi-Key Infineon Murata Toko PHONE 803-946-0690 847-639-6400 218-681-6674 408-501-6000 949-852-2001 708-297-0070 803-626-3123 847-639-1469 218-681-3380 408-501-2424 949-852-2002 708-699-1194
Connect GND. supply voltage +3.0V. When power turned current should approximately 55mA. evaluation gain, first calibrate setup cable losses. Connect signal generator with 1575.42MHz -30dBm LNA_IN. Connect LNA_OUT spectrum analyzer. measured power gain will approximately 16dB. Repeat calibration procedure (step mixer. Connect 1575.42MHz (-30dBm) signal source RFMIX_IN+. Connect RFMIX_OUT+ RFMIX_OUT- through balun spectrum analyzer. 135MHz, losses Anzac balun approximately 0.65dB. measured power gain should approximately 22dB. balun unavailable, single-ended measurement output taken. Terminate unused output final output power measurement. Repeat calibration procedure (step mixer. baluns input output allow fully differential measurement. Connect IFMIX_IN+ IFMIX_IN- through balun 135.42MHz (-47dBm) signal source. Connect IFMIX_OUT+ IFMIX_OUT- through second balun spectrum analyzer. 135MHz, losses Anzac balun approximately 0.65dB, 15MHz, losses approximately 0.3dB. gain calculation, attenuation
Note: Please indicate that using MAX2740 when contacting these component suppliers.
Quick Start
MAX2740 fully assembled factory tested. Follow instructions Connections Setup section. Table lists test equipment recommended verify MAX2740 operation. This list intended guide only; substitutions possible. Figure shows MAX2740 schematic.
Connections Setup
customer option closing loop externally driving loop closed assembled kit. externally drive remove place 1440MHz, -10dBm signal required TANK connector. Perform following steps evaluate MAX2740: Verify that jumpers JU1, JU2, JU7, JU8, place.
MAX2740 Evaluation
load resistor each output must taken into account. total differential gain calculation, assuming baluns, PIN(MEAS) PLOSS(BALUN 135MHz) POUT POUT(MEAS) PLOSS(BALUN 15MHz) PLOSS(LOAD) where: PLOSS(LOAD) 20log 32.3dB 4100 Power_Gain POUT measured power gain should approximately 36dB. control gain, connect second power supply nongrounded terminal jumper JU3, open jumper JU4. gain will evaluated 0.5V 2.5V. important note that gain subsequent gain voltage-gain measurements. Repeat calibration procedure before (step Connect VGA_IN+ VGA_IN- through balun 15.42MHz (-27dBm) signal source. Connect VGA_OUT+ VGA_OUT- through second balun spectrum analyzer. 15.42MHz, losses Anzac balun approximately 0.3dB. gain calculation, attenuation load resistor each output must taken into account. total differential gain calculation, assuming baluns, PIN(MEAS) PLOSS(BALUN 15MHz) POUT POUT(MEAS) PLOSS(BALUN 15MHz) PLOSS(LOAD) where: PLOSS(LOAD) 20log 32.3dB 4100 Voltage_Gain=POUT measured voltage gain 2.5V should approximately 15dB. gain range should more than 50dB. procedure will similar VGA, minus need second voltage source. Repeat calibration procedure before (step Connect FGA_IN+ FGA_IN- through balun 15.42MHz (-43dBm) signal source. Connect FGA_OUT+ FGA_OUT- through second balun spectrum analyzer. 15.42MHz, losses Anzac balun approximately 0.3dB. Calculations identical that VGA. measured voltage gain should approximately 40dB.
Evaluates: MAX2740
Adjustments Control
MAX2740 configured with 100k trim setting adjusting gain. external supply, remove 2-pin series shunt jumpers (JU3 JU4). Connect supply directly nongrounded terminal JU3.
Detailed Description
following sections cover kit's circuit blocks detail. (Refer MAX2740 data sheet additional information.)
two-stage amplifier using feedback gain. circuit requires input output matching. externally biased through output matching network.
MIXER
mixer double-balanced Gilbert cell with local drive provided from low-impedance differential pair. second input brought separate external decoupling output delivered through low-output-impedance emitter followers. input matched outputs individually matched (100 differential). mixer intended drive filter.
MIXER
mixer very similar mixer, except mixer input fully differential. emitter follower outputs intended drive directly into high-impedance, differential, 3-pole lowpass filter made discrete components.
MAX2740 Evaluation Evaluates: MAX2740
inputs outputs both circuits differential. useful gain-control range >50dB. designed deliver 40dB differential gain second frequency 15.42MHz. application, differential inputs received from outputs through balanced lowpass filter circuit. FGA's differential output designed drive digitizer with typical load impedance differential.
Board Layout/Construction
MAX2740 serve board layout guide. Keep board trace lengths short possible minimize parasitics. Keep decoupling capacitors close device, with inductance connection ground plane. GLSOUT signal must routed parallel input avoid loss frequency lock coupling between signals. MAX2740 board uses 14mil-wide traces traces. board 8mil layer profile ground plane FR4, with dielectric constant 4.5, 75mil trace-to-ground-plane spacing.
MAX2740 Evaluation Evaluates: MAX2740
+3VA +3VA 10µF 220nH 220nH +3VA_VCO 1000pF +3VA_AN 1000pF 0.015µF 100pF 8.2nH 2.7pF OPEN OPEN OPEN +3VA RFMIX_OUT+ RFMIX_OUTSMA 1000pF OPEN OPEN 1000pF 1000pF
100pF
IFMIX_OUT+ IFMIX_OUTSMA
1000pF 1.1k
1000pF 1.1k IFRMIXN_OUT
1000pF
IFMIXN_IN
IFMIX_IN
8.2nH
FRMIX_OUT
LNA_OUT +3VA
VCCIF_MIX
LNA_OUT
VCCRF_MIX
IFRMIX_OUT-
FRMIX_OUT+
GNDIF_MIX
FRMIX_IN+
IFMIX_IN+
IFMIX_IN-
GND_2LNA
IFMIX_OUT+ IFMIX_OUTVGA_IN+ VGA_INGND
0.015µF 0.015µF 0.015µF
IFMIX_OUT+ IFMIX_OUTSMA VGA_IN+ VGA_INSMA
GND_2LNA LNA_IN NO_LOAD +3VA 100k 0.015µF 100pF +3V_AN +3V_VCO VCC_ANA GND_ANA LNA_IN GND_1LNA GND_1LNA GND_AMIX FRMIX_INAGCON
0.015µF 0.015µF
MAX2740
VGA_OUT+ VGA_OUTGND FGA_IN+ FGA_INGND FGA_OUT+ REF_IN
VGA_OUT+ VGA_OUTSMA
0.015µF 0.015µF
FGA_IN+ FGA_INSMA
0.015µF 0.015µF
VCC_VCO GND_VCO GND_VCO GLS_OUT GND_DIG DOWN GND_DIG VCC_DIG
FGA_OUT+
100pF SIEMENS 51-03W 12pF
1.8nH 1000pF GLS_OUT REF_IN 1000pF
FGAN_OUT
FGA_OUTC22 0.015µF FGA_OUT_
TANK
OPEN
0.015µF 100pF 220nH
TANK
+3VA 2.74k +3VA MAX4122 12.1k 12.1k 1000pF 2.74k 100pF 2.74k 100pF 2.74k
1000pF
Figure MAX2740 Schematic
MAX2740 Evaluation Evaluates: MAX2740
1.0"
1.0"
Figure MAX2740 Board Layout-Component Side
Figure MAX2740 Board Layout-Ground Plane
1.0"
Figure MAX2740 Board Layout-Power Plane
MAX2740 Evaluation Evaluates: MAX2740
NOTES
MAX2740 Evaluation Evaluates: MAX2740
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 2000 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

MAX2740 Evaluation MAX2740 evaluation kit) simplifies testing MAX

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