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19-2691; Rev 0; 12/02
MAX9981 Evaluation Kit
General Description
Features
The MAX9981 evaluation kit (EV kit) simplifies the evalu-
ation of the MAX9981 825MHz to 915MHz dual high-lin-
earity active down-converter mixer. It is fully assembled
and tested at the factory. Standard 50 ? SMA connec-
tors are included for the inputs and outputs to allow
quick and easy evaluation on the test bench.
This document provides a list of equipment required to
evaluate the device, a straightforward test procedure to
verify functionality, a description of the EV kit circuit,
the circuit schematic, a bill of materials (BOM) and art-
work for each layer of the PC board.
Contact MaximDirect sales at 888-629-4642 to check
on pricing and availability for these kits.
Component Suppliers
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Fully Assembled and Tested
+27.3dBm Input IP3
+13.6dBm Input 1dB Compression Point
825MHz to 915MHz RF Frequency
725MHz to 1085MHz LO Frequency
70MHz to 170MHz IF Frequency
2.1dB Conversion Gain
10.8dB Noise Figure
42dB Channel-to-Channel Isolation
-5dBm to +5dBm LO Drive
Built-In LO Switch with 52dB LO1-to-LO2 Isolation
Ordering Information
SUPPLIER
PHONE
WEBSITE
PART
TEMP RANGE
IC PACKAGE
Coilcraft
Digi-Key
800-322-2645 www.coilcraft.com
800-344-4539 www.digikey.com
MAX9981EVKIT
-40 ° C to +85 ° C
36 QFN-EP*
(6mm × 6mm)
Johnson
Mini-Circuits
Murata
507-833-8822 www.johnsoncomponents.com
718-934-4500 www.minicircuits.com
770-436-1300 www.murata.com
* EP = Exposed paddle.
Component List
DESIGNATION
QTY
DESCRIPTION
DESIGNATION
QTY
DESCRIPTION
33pF ±5%, 50V C0G ceramic
560nH ±5% wire-wound
C1, C4
2
capacitors (0603)
L1 – L4
4
inductors (1008)
Murata GRM1885C1H330J
Coilcraft 1008CS-561XJBC
3.9pF ±0.25pF, 50V C0G ceramic
R1, R2
2
267 ? ±1% resistors (0603)
C2, C3
C5, C6,
C9, C10
C7, C8
C11, C12
C13, C16,
C17, C20
2
4
2
2
4
capacitors (0603)
Murata GRM1885C1H3R9C
100pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H101J
15pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H150J
0.033μF ±10%, 25V X7R ceramic
capacitors (0603)
Murata GRM188R71E333K
220pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H221J
R3 – R6
R7
J1 – J6
T1, T2
TP1
TP2
TP3
4
1
6
1
1
1
1
137 ? ±1% resistors (0603)
47k ? ±5% resistor (0603)
PC board edge-mount SMA RF
connectors (flat tab launch)
Johnson 142-0741-856
4:1 transformers (200:50)
Mini-Circuits TC4-1W-7A
Large test point for 0.063in PC board
(red) Mouser 151-107
Large test point for 0.063in PC board
(black) Mouser 151-103
Large test point for 0.063in PC board
(white) Mouser 151-101
C14, C15,
C18, C19
4
330pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H331J
U1 1 MAX9981EGX-T*
* The exposed paddle conductor on U1 must be solder
attached to a grounded pad on the circuit to ensure a proper
electrical/thermal design.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
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