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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)
MAX2306/MAX2308/MAX2309
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
________________________________________________________________ Maxim Integrated Products 1
19-2014; Rev 3; 8/04
EVALUATION KIT AVAILABLE
Pin Configurations appear at end of data sheet.
Block Diagram appears at end of data sheet.
Ordering Information
Selector Guide
*Exposed paddle