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MAX2309 Datasheet

CDMA IF VGAs and I/Q Demodulators

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MAX2309 pdf
19-2014; Rev 3; 8/04
EVALUATION KIT AVAILABLE
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
General Description
The MAX2306/MAX2308/MAX2309 are IF receivers
designed for dual-band, dual-mode, and single-mode
N-CDMA and W-CDMA cellular phone systems. The
signal path consists of a variable-gain amplifier (VGA)
and I/Q demodulator. The devices feature guaranteed
+2.7V operation, a gain control range of over 110dB,
and high input IP3 (-31dBm at 35dB gain, 3.4dBm at
-35dB gain).
Unlike similar devices, the MAX2306 family of receivers
includes dual oscillators and synthesizers to form a
self-contained IF subsystem. The synthesizer’s refer-
ence and RF dividers are fully programmable through a
3-wire serial bus, enabling dual-band system architec-
tures using any common reference and IF frequency.
The differential baseband outputs have enough band-
width to suit both N-CDMA and W-CDMA systems, and
offer saturated output levels of 2.7Vp-p at a low +2.75V
supply voltage. Including the low-noise voltage-con-
trolled oscillator (VCO) and synthesizer, the MAX2306
draws only 26mA from a +2.75V supply in CDMA (dif-
ferential IF) mode.
The MAX2306/MAX2308/MAX2309 are available in 28-
pin Thin QFN and QFN packages.
Applications
Single/Dual/Triple-Mode CDMA Handsets
Globalstar Dual-Mode Handsets
Wireless Data Links
W-CDMA Handsets
Wireless Local Loop (WLL)
Features
Complete IF Subsystem Includes VCO and
Synthesizer
Supports Dual-Band, Triple-Mode Operation
VGA with >110dB Gain Control
Quadrature Demodulator
High Output Level (2.7V)
Programmable Charge-Pump Current
Supports Any IF Frequency Between 40MHz and
300MHz
3-Wire Programmable Interface
Low Supply Voltage (+2.7V)
PART
MAX2306EGI
MAX2306ETI
MAX2308EGI
MAX2308ETI
MAX2309EGI
MAX2309ETI
*Exposed paddle
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 QFN-EP*
28 TQFN-EP*
28 QFN-EP*
28 TQFN-EP*
28 QFN-EP*
28 TQFN-EP*
Pin Configurations appear at end of data sheet.
Block Diagram appears at end of data sheet.
PART
MAX2306
MAX2308
MAX2309
MODE
AMPS,
Cellular CDMA,
PCS CDMA
AMPS,
Cellular CDMA,
PCS CDMA
External AMPS,
Cellular CDMA,
PCS CDMA
DESCRIPTION
Dual Band, Triple Mode with Two
IF VCOs
Selector Guide
INPUT RANGE
40MHz to 300MHz
Dual Band, Triple Mode with Common
IF VCO
70MHz to 300MHz
Dual Band, Triple Mode (Drives External
AMPS Discriminator)
70MHz to 300MHz
________________________________________________________________ Maxim Integrated Products 1
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.
Maxim
Maxim


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