Document
19-2487; Rev 3; 1/04
Quadruple-Mode PCS/Cellular/GPS LNA/Mixers
General Description
The MAX2351/MAX2354/MAX2358/MAX2359/MAX2530/ MAX2531/MAX2537/MAX2538 family of single- and multiband LNA/mixer ICs is optimized for CDMA, GSM, and TDMA applications in both cellular and PCS bands. In addition, the MAX2530/MAX2531/MAX2537/MAX2538 ICs feature a GPS LNA/mixer signal path for E911 and traveler assistance applications. The cellular and PCS signals can be routed to either IF port. For example, one IF port can be connected to an IF filter with 30kHz bandwidth, while the other port can drive an IF filter with a wider bandwidth. The GPS band has its own IF port. To optimize dynamic range at minimum current, the MAX2351/MAX2354/MAX2358/MAX2359/MAX2530/ MAX2531/MAX2537/MAX2538 implement multiple LNA and mixer states, including high gain/high linearity, high gain/low linearity, midgain, low gain, and ultra-low gain. In high-gain/high-linearity mode, the high-IP3 LNA minimizes desensitization in the presence of a large interfering signal. For the other gain states, the LNA current is reduced to improve standby time. Each band is implemented with a separate mixer to optimize performance for the specific band, and each mixer provides multiple linearity modes to optimize linearity and current consumpwww.DataSheet4U.com tion. The ultra-low gain mode operates with very little current, which results in significant power savings because the handset typically spends most of its time in this mode.
Features
♦ Eliminate Up to 35 External Components ♦ Low LNA Noise Figure PCS: 1.2dB Cellular: 0.9dB GPS: 1.0dB ♦ No External GPS VCO Required ♦ No Interstage GPS SAW Filter Required ♦ Triple Band, Quadruple Mode ♦ Ultra-Low Current: <10mA Average in CDMA Phones ♦ Small 28-Pin QFN Package (5mm ✕ 5mm)
MAX2351/4/8/9/MAX2530/1/7/8
Ordering Information
PART MAX2351ETI MAX2354ETI MAX2358ETI MAX2359ETI MAX2530ETI MAX2531ETI MAX2537ETI 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 -40°C to +85°C PIN-PACKAGE 28 Thin QFN-EP* 28 Thin QFN-EP* 28 Thin QFN-EP* 28 Thin QFN-EP* 28 Thin QFN-EP* 28 Thin QFN-EP* 28 Thin QFN-EP* 28 Thin QFN-EP*
MAX2538ETI -40°C to +85°C *EP = exposed pad.
Applications
Triple-Band, Quadruple-Mode PCS/Cellular Handsets
PLNA_OUT
Pin Configurations
CMIX_IN PMIX_IN IF_SEL BAND IF1+ 22 IF123
Single-Band Handsets E911 and Traveler Assistance Through GPS GSM/TDMA Cellular Phones
CLNA_OUT
28
27
26
25
24
Selector Guide
PLNA_IN
1
21
GIF-
2
IF OUTPUT MUX
20
GIF+
PART MAX2351 MAX2354 MAX2358 MAX2359 MAX2530 MAX2531 MAX2537 MAX2538
CELL PCS GPS ✓ ✓ ✓ — ✓ ✓ ✓ ✓ ✓ — ✓ ✓ ✓ ✓ — ✓ — — — — ✓ ✓ ✓ ✓
CELL VCO Input Input Internal divider — Input Input Internal divider Internal divider
PCS VCO Internal doubler — Input Input Input Internal doubler Input Input
G1 7 8 GLNA_OUT 9 G2 10 GMIX_IN 11 MODE ÷1.5 SHDN 5 GND 3
19
IFO-
CLNA_IN
4
MAX2538
18
IFO+
17
VCC
GLNA_IN
6
÷2
16
LO_OUT
15 12 BIAS 13 PLL 14 LO_IN
BUFFEN
Pin Configurations continued at end of data sheet. ________________________________________________________________ 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.
Quadruple-Mode PCS/Cellular/GPS LNA/Mixers MAX2351/4/8/9/MAX2530/1/7/8
ABSOLUTE MAXIMUM RATINGS
VCC to GND ...........................................................-0.3V to +4.3V Digital Input Voltage to GND ......................-0.3V to (VCC + 0.3V) LNA Input (Low-Gain Mode) Level ...................................15dBm LO Input Level ....................................................................5dBm Digital Input Current............................................................10mA Continuous Power Dissipation (TA = +70°C) 28-Pin QFN-EP (derate 21mW/°C above +70°C)...................................................................1.6W 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 Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = 2.7V to 3.3V, RBIAS = 20kΩ, TA = -40°C to +85°C. Typical values are at VCC = 2.75V and TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER PCS MODE (see Table 1 for abbreviations) ULG Operating Supply Current LG HGHL MAX2358/MAX2359/MAX2530/MAX2538 MAX2351/MAX2531 MAX2358/MAX2359/MAX2530/M.