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SA637 PDF预览

SA637

更新时间: 2024-11-18 22:43:35
品牌 Logo 应用领域
恩智浦 - NXP 接收机
页数 文件大小 规格书
11页 146K
描述
Low-voltage digital IF receiver

SA637 数据手册

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Philips Semiconductors RF Communications Products  
Product specification  
Low-voltage digital IF receiver  
SA637  
DESCRIPTION  
FEATURES  
PIN CONFIGURATION  
The SA637 is a low-voltage high performance  
monolithic digital system with high-speed  
RSSI incorporating a mixer, oscillator with  
buffered output, two limiting intermediate  
frequency amplifiers, fast logarithmic  
received signal strength indicator (RSSI),  
voltage regulator, RSSI op amp and power  
down pin. The SA637 is available in SSOP  
(shrink small outline package).  
V = 2.7 to 5.5V  
CC  
DK Packages  
Low power receiver (3.8mA @ 3V)  
MIXER  
OUTPUT  
IF AMP  
DECOUP  
Power down mode (I = 110µA)  
CC  
1
2
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
RF  
RF  
IN  
IN  
Fast RSSI rise and fall times  
3
OSC E  
OSC B  
IF AMP IN  
Extended RSSI range with temperature  
IF AMP  
DECOUP  
4
compensation  
OSC  
BUFFER  
5
IF AMP OUT  
GND  
RSSI op amp  
The SA637 was designed for portable digital  
communication applications and will function  
down to 2.7V. The limiter amplifier has  
differential outputs with 2MHz small signal  
bandwidth. The RSSI output has access to  
the feedback pin. This enables the designer  
to level adjust the outputs or add filtering.  
6
V
CC  
2MHz limiter small signal bandwidth  
455kHz filter matching (1.5k)  
Differential limiter output  
Oscillator buffer  
7
RSSI  
LIMITER IN  
LIMITER  
DECOUP  
LIMITER  
DECOUP  
RSSI  
FEEDBACK  
POWER  
DOWN  
8
9
10  
LIM OUT (-)  
LIM OUT (+)  
SSOP-20 package  
APPLICATIONS  
ADC (American Digital Cellular)  
Digital receiver systems  
Cellular radio  
ORDERING INFORMATION  
DESCRIPTION  
TEMPERATURE RANGE  
-40 to +85°C  
ORDER CODE  
DWG #  
20-Pin Plastic Shrink Small Outline Package (Surface-mount)  
SA637DK  
1563  
BLOCK DIAGRAM  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
GND  
IF  
AMP  
LIMITER  
MIXER  
FAST RSSI  
+
OSCILLATOR  
POWER  
DOWN  
+
E
B
V
CC  
1
2
3
4
5
6
7
8
9
10  
2
October 27, 1993  
853-1718 11205  

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