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PDF SA637 Data sheet ( Hoja de datos )

Número de pieza SA637
Descripción Low-voltage digital IF receiver
Fabricantes Philips 
Logotipo Philips Logotipo



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Philips Semiconductors RF Communications Products
Low-voltage digital IF receiver
Product specification
SA637
DESCRIPTION
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).
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.
FEATURES
VCC = 2.7 to 5.5V
Low power receiver (3.8mA @ 3V)
Power down mode (ICC = 110µA)
Fast RSSI rise and fall times
Extended RSSI range with temperature
compensation
RSSI op amp
2MHz limiter small signal bandwidth
455kHz filter matching (1.5k)
Differential limiter output
Oscillator buffer
SSOP-20 package
APPLICATIONS
ADC (American Digital Cellular)
Digital receiver systems
Cellular radio
PIN CONFIGURATION
DK Packages
RFIN 1
RFIN 2
OSC E 3
OSC B 4
OSC 5
BUFFER
VCC 6
RSSI 7
RSSI 8
FEEDBACK
POWER 9
DOWN
LIM OUT (-) 10
20 MIXER
OUTPUT
19 IF AMP
DECOUP
18 IF AMP IN
17 IF AMP
DECOUP
16 IF AMP OUT
15 GND
14 LIMITER IN
13 LIMITER
DECOUP
12 LIMITER
DECOUP
11 LIM OUT (+)
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic Shrink Small Outline Package (Surface-mount)
TEMPERATURE RANGE
-40 to +85°C
ORDER CODE
SA637DK
DWG #
1563
BLOCK DIAGRAM
20 19
18 17 16
MIXER
IF
AMP
OSCILLATOR
15 14
GND
13 12
LIMITER
11
FAST RSSI
+–
12
+–
POWER
DOWN
EB
VCC
3
45
67
8
9 10
October 27, 1993 2 853-1718 11205

1 page




SA637 pdf
Philips Semiconductors RF Communications Products
Low-voltage digital IF receiver
Product specification
SA637
PERFORMANCE CHARACTERISTICS (cont.)
IF Power Gain vs Temperature and Supply Voltage
40.00
38.00
36.00
34.00
5.5V
3V
2.7V
32.00
30.00
-50 -40 -30 -20 -10
0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
Limiter Power Gain vs Temperature and Supply Voltage
65.00
63.00
61.00
59.00
5.5V
3V
2.7V
57.00
55.00
-50 -40 -30 -20 -10
0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
400.00
350.00
300.00
Limiter Output (+) Level vs Temperature
and Supply Voltage
5.5V
3V
2.7V
250.00
200.00
150.00
100.00
50.00
0.00
-50 -40 -30 -20 -10
0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
400.00
350.00
Limiter Output (–) Level vs Temperature
and Supply Voltage
5.5V
3V
300.00
2.7V
250.00
200.00
150.00
100.00
50.00
0.00
-50 -40 -30 -20 -10
0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
RSSI vs RF Level and Temperature – VCC = 3V
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
-40C
+85C
0.00
-120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
RF LEVEL (dBm)
0
RSSI vs RF Level and Supply Voltage –
Temperature = 25°C
2.50
2.25
2.00
1.75
5.5V
3V
2.7V
1.50
1.25
1.00
0.75
0.50
0.25
0.00
-120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10
0
RF LEVEL (dBm)
October 27, 1993
6

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SA637 arduino
Philips Semiconductors RF Communications Products
Low-voltage digital IF receiver
Product specification
SA637
October 27, 1993
12

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