MAX2640/MAX2641 Evaluation Kits MAX2640/MAX2641 evaluation kits k

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MAX2640/MAX2641 Evaluation Kits MAX2640/MAX2641 evaluation kits k

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MAX2640/MAX2641 Evaluation Kits
MAX2640/MAX2641 evaluation kits kits) simplify evaluation MAX2640/MAX2641 low-noise amplifiers (LNAs). They enable testing device's performance require additional support circuitry. signal inputs outputs connectors facilitate connection test equipment. MAX2640 kits assembled with MAX2640 incorporate input output matching components optimized frequency 900MHz. MAX2641 kits assembled with MAX2641 incorporate input output matching components optimized frequency 1900MHz. matching components changed match frequencies from 400MHz 1500MHz MAX2640 from 1400MHz 2500MHz MAX2641. Consult Tables through MAX2640/MAX2641 data sheet devices S-parameters noise parameters design matching networks other frequencies.
Features
Easy Evaluation MAX2640/MAX2641 +2.7V +5.5V Single-Supply Operation Input Output Matched 900MHz (MAX2640) Input Output Matched 1900MHz (MAX2641) Critical Peripheral Components Included
Evaluate: MAX2640/MAX2641
Ordering Information
PART TEMP. RANGE PACKAGE SOT23-6 SOT23-6 MARK AAAV AAAW
MAX2640EVKIT -40°C +85°C MAX2641EVKIT -40°C +85°C
Component Suppliers
SUPPLIER Coilcraft Murata Electronics PHONE 847-639-6400 800-831-9172 847-639-1469 814-238-0490
Component List
DESIGNATION MAX2640 MAX2641 ZM1, DESCRIPTION 470pF ceramic caps (0805) Murata GRM40COG471J50V ±0.1pF ceramic (0805) Murata GRM40COG3R0B50V 100pF ceramic (0805) Murata GRM40COG101J50V 10µF ceramic (1206) TAJA106K010R ±0.1pF ceramic (0805) Murata GRM40COG2R0B50V ±0.1pF ceramic caps (0603) Murata GRM39COG1R0B50V installed None None DESIGNATION MAX2640 MAX2641 RFIN, RFOUT RFIN, RFOUT DESCRIPTION 9.85nH air-core inductor Coilcraft 1606-9-5 2.55nH air-core inductor Coilcraft 0906-3-5 connectors edge mount) Johnson 142-0701-801 MAX2640EUT-T (topmark: AAAV), 6-pin SOT23-6 MAX2641EUT-T (topmark: AAAW), 6-pin SOT23-6 MAX2640 board MAX2641 board
Maxim Integrated Products
free samples latest literature: http://www.maxim-ic.com, phone 1-800-998-8800. small orders, phone 1-800-835-8769.
MAX2640/MAX2641 Evaluation Kits Evaluate: MAX2640/MAX2641
Quick Start
MAX2640/MAX2641 kits fully assembled factory tested. Follow instructions Connections Setup section proper device evaluation. gain 15.1dB MAX2640 14.4dB MAX2641 after accounting cable board losses. Table lists board losses specific frequencies. (Optional) Another method determining gain using network analyzer. This advantage displaying gain versus swept frequency band, addition displaying input output return loss. Refer network analyzer manufacturer's user manual setup details.
Test Equipment Required
This section lists recommended test equipment verify operation MAX2640/MAX2641. intended guide only, some substitutions possible. signal generator capable delivering least 0dBm output power 2.5GHz (HP8648C, equivalent) spectrum analyzer that covers operating frequency range MAX2640/MAX2641 well harmonics (HP8561E, example) power supply capable 100mA +2.7V +5.5V optional ammeter measuring supply current cables (Optional) noise figure meter (HP8970B, example) (Optional) Network analyzer (HP8753D, example) measure return loss gain
Checking Noise Figure
Noise figure measurements low-noise devices such MAX2640/MAX2641 extremely sensitive board setup losses parasitics. There many techniques precautions measuring noise figure below 1dB. Detailed explanation these items goes beyond scope this document. more information perform this level noise figure measurement, refer noise figure meter operating manual well Hewlett Packard application note 57-2 "Noise Figure Measurement Accuracy."
Layout Considerations
good board layout essential part circuit design. board serve guide laying board using MAX2640/ MAX2641. Generally, each node board should have decoupling capacitor. This minimizes supply coupling from section another. star topology supply layout, which each node circuit separate connection central node, further minimize coupling between sections circuit board.
Connections Setup
Checking Power Gain
This section provides step-by-step guide operating kits their function. Connect supply (through ammeter, desired) terminals kit. generator output frequency 900MHz MAX2640 1900MHz MAX2641 power level -34dBm. Connect signal generator RFIN connector. Connect spectrum analyzer RFOUT connector kit. center frequency 900MHz MAX2640 1900MHz MAX2641, total span 200MHz, reference level -10dBm. Turn supply. supply current should read approximately 3.5mA either MAX2640 MAX2641 using ammeter). Activate generator's output. signal spectrum analyzer's display should indicate typi2
Modifying
MAX2640 factory-configured operation 900MHz easily configured operate from 400MHz 1500MHz. device parameters listed Tables MAX2640/MAX2641 data sheet determine proper input output matching components other frequencies. evaluate MAX2641 frequencies other than factory configured 1900MHz, device parameters listed Tables MAX2640/MAX2641 data sheet determine proper input output matching components. Table lists recommended matching component values MAX2641 1575MHz 2450MHz. MAX2640/MAX2641 designed AC-coupled operation. When determining matching components other frequencies, ensure that DC-blocking capacitor part matching network.
MAX2640/MAX2641 Evaluation Kits
Table MAX2640/MAX2641 Board Component Losses Matching Component Values
FREQUENCY (MHz) MAX2640 MAX2641 1575 1900 2450 VALUE (pF) VALUE (pF) Open Open Open 100pF VALUE (nH) 9.85 2.55 1.65 VALUE POSITION VALUE POSITION (pF) 6.8nH 11.5 25.5 INPUT LOSS (dB) 0.25 0.37 0.41 0.56 OUTPUT LOSS (dB) 0.15 0.30 0.30 0.50
Evaluate: MAX2640/MAX2641
*The series inductor replaced transmission line appropriate impedance electrical length. 6.8nH Murata LQP11A6N8C00 (0603)
470pF
9.85nH
RFIN
MAX2640
OPEN 470pF 10µF
RFOUT
Figure MAX2640 Schematic
470pF 2.55nH RFIN
MAX2641
OPEN 470pF 10µF
RFOUT 100pF
Figure MAX2641 Schematic
MAX2640/MAX2641 Evaluation Kits Evaluate: MAX/MAX2640/MAX2641
1.0"
Figure MAX2640 Component Placement Guide- Component Side
1.0"
Figure MAX2641 Component Placement Guide- Component Side
1.0"
Figure MAX2640 Board Layout-Component Side
1.0"
Figure MAX2641 Board Layout-Component Side
1.0"
Figure MAX2640/MAX2641 Board Layout- Ground Plane
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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