Document
19-1807; Rev 1; 3/01
KIT ATION EVALU LE B A IL A AV
Triple/Dual-Mode CDMA LNA/Mixers
Features
o 1.4dB LNA Noise Figure o 15dB LNA Gain o Mixer Noise Figure 7.5dB (CDMA) 8.7dB (AMPS) o Mixer Gain 14.5dB PCS 13.3dB Cellular 8.8dB AMPS o LO Frequency Divider, Saves VCO Module o LO Output Buffers for TX o Ultra-Small 28-Pin Leadless Package
General Description
The MAX2338 receiver RF front-end IC is designed for dual-band CDMA cellular phones and can also be used in dual-band TDMA, GSM, or EDGE cellular phones. Thanks to the MAX2338’s on-chip low-power LO divider, the cellular VCO module can be eliminated. The MAX2338 includes a low-noise amplifier (LNA) with an adjustable high-input third-order intercept point (IIP3) to minimize intermodulation and cross-modulation in the presence of large interfering signals. For cellular band operation, a low-gain LNA is available for higher cascaded IIP3 at lower current. The CDMA mixers are designed for high linearity, low noise, and differential IF outputs. The FM mixer is designed for lower current and single-ended output. The MAX2338 triple-mode LNA/mixer includes an onchip LO frequency divider to allow the use of a single VCO for both bands. This device is available in an ultrasmall 28-pin leadless QFN package.
MAX2338
Ordering Information ________________________Applications
Dual-Band, Triple-Mode PCS/Cellular Phones Dual-Mode Cellular Phones
PART MAX2338EGI TEMP RANGE -40°C to +85°C PIN-PACKAGE 28 QFN
Pin Configuration/ Functional Diagram
CLNAOUT CMIXIN 22 PMIXIN 23
TOP VIEW
PLNAOUT
Typical Operating Circuit appears at end of data sheet.
GND
GND 25
28
27
26
RLNA 1 PLNAIN 2 GND 3 CLNAIN 4 BAND 5 LIN 6 GAIN 7
GND 24
21 RBIAS 20 IF+ 19 IF18 GND
MAX2338
÷2
17 BUFFEN 16 VCC 15 FMOUT
8 GND
9 LO/2
10 LOIN
11 GND
12 PLOOUT
13 CLOOUT
14 N.C.
QFN
________________________________________________________________ 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.
Triple/Dual-Mode CDMA LNA/Mixers MAX2338
ABSOLUTE MAXIMUM RATINGS
VCC to GND..........................................................+0.3V to +4.3V Digital Input Voltage to GND ......................-0.3V to (VCC + 0.3V) LNA Input Level...............................................................1V peak LO, Mixer Input Levels .....................................................+5dBm Digital Input Current .........................................................±10mA Continuous Power Dissipation (TA = +70°C) 28-Pin QFN (derate 28.5mW/°C above TA = +70°C).........2W Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) ................................ +300°C
Stresses beyond those listed under “Absolute .