MAX2323 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – Triple/Dual-Mode CDMA LNA/Mixers

19-1736; Rev 0; 7/00
Triple/Dual-Mode
CDMA LNA/Mixers
________________General Description
The MAX2323/MAX2325 are low-noise amplifier (LNA)
plus mixer ICs optimized for code-division multiple-access
(CDMA) applications in both cellular and PCS bands. The
MAX2323 addresses dual-band, triple-mode CDMA appli-
cations by providing switched signal paths for cellular FM,
cellular CDMA, and PCS CDMA. The MAX2325 is a cellu-
lar-band dual-mode version.
To optimize cellular-band dynamic range at minimum cur-
rent, the MAX2323/MAX2325 implement four LNA states:
high gain/high linearity, high gain/low linearity, midgain,
and low gain. In high-gain/high-linearity mode, the
adjustable high-intercept LNA minimizes desensitization in
the presence of a large interfering signal. For the other
gain states, the LNA current is reduced to improve stand-
by time.
The CDMA mixers are designed for high linearity, low
noise, and differential IF outputs, while the FM mixer is
designed for lower current and single-ended output. Each
band is implemented with a separate mixer to optimize
performance for the specific band.
The MAX2323/MAX2325 can also be used in TDMA,
EDGE, and W-CDMA phones.
____________________________Features
o 2.7V Operation
o Dual Band, Triple Mode
o Three LNA Gain Settings (Cellular)
o Two LNA Gain Settings (PCS)
o 18mA in Low-Gain Mode
19.5mA in Paging and Midgain Mode
26.5mA in High-Gain, High-Linearity Mode
16.5mA in FM Mode, High-Gain, Low-Linearity
Mode
o 2.5dB (typ) Cascade Noise Figure
o Adjustable LNA IIP3, +5dBm to +13dBm
o Ultra-Small 28-Pin Package (5mm x 5mm)
Ordering Information
PART
MAX2323EGI
MAX2325EGI
MAX2323EVKIT
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN- PACKAGE
28 QFN
28 QFN
28 QFN
________________________Applications
Dual-Band, Triple-Mode PCS/Cellular Phones
Dual-Mode Cellular Phones
Typical Application Circuits appear at end of data sheet.
TOP VIEW
Pin Configuration/
Functional Diagram
28 27 26 25 24 23 22
RLNA 1
PLNAIN 2
GND 3
CLNAIN 4
SLEEP 5
G2 6
G1 ₇
MAX2323
21 RBIAS
20 CDMA+
19 CDMA-
18 GND
17 BAND
16 VCC
15 FMOUT
8 9 10 11 12 13 14
QFN
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