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MAX9981 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX9981
Description  825MHz to 915MHz, Dual SiGe High-Linearity Active Mixer
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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General Description
The MAX9981 dual high-linearity mixer integrates a local
oscillator (LO) switch, LO buffer, LO splitter, and two
active mixers. On-chip baluns allow for single-ended RF
and LO inputs. The active mixers eliminate the need for
an additional IF amplifier because the mixer provides a
typical overall conversion gain of 2.1dB.
The MAX9981 active mixers are optimized to meet the
demanding requirements of GSM850, GSM900, and
CDMA850 base-station receivers. These mixers provide
exceptional linearity with an input IP3 of greater than
+27dBm. The integrated LO driver allows for a wide
range of LO drive levels from -5dBm to +5dBm. In addi-
tion, the built-in high-isolation switch enables rapid LO
selection of less than 250ns, as needed for GSM trans-
ceiver designs.
The MAX9981 is available in a 36-pin QFN package
(6mm 6mm) with an exposed paddle, and is specified
over the -40°C to +85°C extended temperature range.
Applications
GSM850/GSM900 2G and 2.5G EDGE Base-
Station Receivers
Cellular cdmaOne™ and cdma2000™ Base-
Station Receivers
TDMA and Integrated Digital Enhanced Network
(iDEN)™ Base-Station Receivers
Digital and Spread-Spectrum Communication
Systems
Microwave Point-to-Point Links
Features
o +27.3dBm Input IP3
o +13.6dBm Input 1dB Compression Point
o 825MHz to 915MHz RF Frequency Range
o 70MHz to 170MHz IF Frequency Range
o 725MHz to 1085MHz LO Frequency Range
o 2.1dB Conversion Gain
o 10.8dB Noise Figure
o 42dB Channel-to-Channel Isolation
o -5dBm to +5dBm LO Drive
o +5V Single-Supply Operation
o Built-In LO Switch with 52dB LO1 to LO2 Isolation
o ESD Protection
o Integrated RF and LO Baluns for Single-Ended
Inputs
825MHz to 915MHz, Dual SiGe High-Linearity
Active Mixer
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-2588; Rev 0; 9/02
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.
PART
TEMP RANGE
PIN-PACKAGE
MAX9981EGX-T
-40°C to +85°C
36 QFN-EP* (6mm
× 6mm)
1
2
3
4
5
6
7
8
9
19
20
21
22
23
24
25
26
27
LO2
GND
GND
GND
MAINBIAS
DIVBIAS
TAPDIV
TAPMAIN
RFMAIN
RFDIV
LO1
LOSEL
GND
GND
GND
GND
GND
VCC
MAX9981
6mm x 6mm QFN-EP
TOP VIEW
Pin Configuration/
Functional Diagram
*EP = Exposed paddle.
cdmaOne is a trademark of CDMA Development Group.
cdma2000 is a trademark of Telecommunications Industry
Association.
iDEN is a trademark of Motorola, Inc.




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