19-2014; Rev 3; 8/04
CDMA IF VGAs a n d I/Q De m o d u la t o rs
w it h VCO a n d S yn t h e s ize r
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX2306/MAX2308/MAX2309 a re IF re c e ive rs
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).
♦ 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)
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.
♦ Programmable Charge-Pump Current
♦ Supports Any IF Frequency Between 40MHz and
300MHz
♦ 3-Wire Programmable Interface
♦ Low Supply Voltage (+2.7V)
Ord e rin g In fo rm a t io n
PART
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*
MAX2306EGI
MAX2306ETI
MAX2308EGI
MAX2308ETI
MAX2309EGI
MAX2309ETI
The MAX2306/MAX2308/MAX2309 are available in 28-
pin Thin QFN and QFN packages.
Ap p lic a t io n s
Single/Dual/Triple-Mode CDMA Handsets
Globalstar Dual-Mode Handsets
Wireless Data Links
*Exposed paddle
W-CDMA Handsets
Wireless Local Loop (WLL)
Pin Configurations appear at end of data sheet.
Block Diagram appears at end of data sheet.
S e le c t o r Gu id e
PART
MODE
DESCRIPTION
INPUT RANGE
AMPS,
Cellular CDMA,
PCS CDMA
Dual Band, Triple Mode with Two
IF VCOs
MAX2306
40MHz to 300MHz
AMPS,
Cellular CDMA,
PCS CDMA
Dual Band, Triple Mode with Common
IF VCO
MAX2308
MAX2309
70MHz to 300MHz
70MHz to 300MHz
External AMPS,
Cellular CDMA,
PCS CDMA
Dual Band, Triple Mode (Drives External
AMPS Discriminator)
________________________________________________________________ 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.