19-2487; Rev 3; 1/04
Quadruple-Mode PCS/Cellular/GPS LNA/Mixers
General Description
Features
The MAX2351/MAX2354/MAX2358/MAX2359/MAX2530/
MAX2531/MAX2537/MAX2538 family of single- and multi-
band 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.
♦ 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
✕
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 mini-
mizes desensitization in the presence of a large interfer-
ing signal. For the other gain states, the LNA current is
reduced to improve standby time. Each band is imple-
mented with a separate mixer to optimize performance for
the specific band, and each mixer provides multiple lin-
earity modes to optimize linearity and current consump-
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.
♦ Small 28-Pin QFN Package (5mm 5mm)
Ordering Information
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
-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*
MAX2351ETI
MAX2354ETI
MAX2358ETI
MAX2359ETI
MAX2530ETI
MAX2531ETI
MAX2537ETI
MAX2538ETI
*EP = exposed pad.
Applications
Triple-Band, Quadruple-Mode PCS/Cellular Handsets
Single-Band Handsets
Pin Configurations
E911 and Traveler Assistance Through GPS
GSM/TDMA Cellular Phones
28
27
26
25
24
23
22
CLNA_OUT
1
2
3
4
21 GIF-
20 GIF+
Selector Guide
PLNA_IN
GND
PART CELL PCS GPS CELL VCO
PCS VCO
Internal doubler
—
19
IFO-
MAX2351
MAX2354
MAX2358
MAX2359
MAX2530
MAX2531
MAX2537
MAX2538
✓
✓
✓
—
✓
✓
✓
✓
✓
—
✓
✓
✓
✓
—
✓
—
—
—
—
✓
Input
Input
MAX2538
18 IFO+
CLNA_IN
Internal divider
—
Input
5
6
7
17
SHDN
GLNA_IN
G1
V
CC
Input
Input
Input
÷2
16 LO_OUT
✓
Input
Internal doubler
Input
÷1.5
15
BUFFEN
✓
Internal divider
Internal divider
✓
Input
8
9
10
11
12
13
14
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.