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MAX2537EGI

更新时间： 2023-01-02 17:51:17
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RF and Baseband Circuit

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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.  
1234567...27

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