Rainbow Electronics MAX2325 - Manual

________________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.
________________________Applications
Dual-Band, Triple-Mode PCS/Cellular Phones
Dual-Mode Cellular Phones
____________________________Features
♦ 2.7V Operation
♦ Dual Band, Triple Mode
♦ Three LNA Gain Settings (Cellular)
♦ Two LNA Gain Settings (PCS)
♦ 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
♦ 2.5dB (typ) Cascade Noise Figure
♦ Adjustable LNA IIP3, +5dBm to +13dBm
♦ Ultra-Small 28-Pin Package (5mm x 5mm)
MAX2323/MAX2325
Triple/Dual-Mode
CDMA LNA/Mixers
________________________________________________________________ Maxim Integrated Products 1
19-1736; Rev 0; 7/00
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Pin Configuration/
Functional Diagram
Typical Application Circuits appear at end of data sheet.
MAX2323
25 26 27 28 22 23 24
8 9 10 11 12 13 14
15
16
17
18
19
20
21 1
2
3
4
5
6
7
MODE.
GND
LOLIN LOHIN
GND GND GND
CMIXIN CLNAOU
T
GND PLNAOU
T
GND GND PMIXIN
GND
CLNAIN
SLEEP
G2
G1
PLNAIN
RLNA
CDMA-
GND
BAND
V CC
FMOUT
CDMA+
RBIAS
QFN
TOP VIEW
PART TEMP. RANGE PIN- PACKAGE
MAX2323EGI -40 °C to +85°C 28 QFN
MAX2325EGI -40 °C to +85°C 28 QFN
MAX2323EVKIT -40 °C to +85°C 28 QFN
Ordering Information