SA637 Просмотр технического описания (PDF) - Philips Electronics
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SA637 Datasheet PDF : 11 Pages
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Philips Semiconductors RF Communications Products
Low-voltage digital IF receiver
Product specification
SA637
FLT1
C3
C4
FLT2
C5
C6
C11
20 19 18 17 16 15 14 13 12 11
C1
RF
INPUT
C12
MIXER
IF
AMP
OSCILLATOR
RSSI
LIMITER
RSSI BUFF
LO
+ – BUFF
+–
L4 *
1
2
L1
C14
3
4
5
6
C8
L3
C7
R1
*
C2
X1
R3 *
7
8
9
10
C9
R2
C13
R9
* R4
L5 *
R5 *
R6 *
C15
L2
C10
R8
*
R7 *
OSC
OUT
VCC RSSI
POWER LIMITER
DOWN OUT(–)
LIMITER
OUT(+)
Component List
C1 5-30pF
C2 5-30pF
C3 0.1µF
C4 0.1µF
C5 0.1µF
C6 0.1µF
C7 10pF
C8 0.1µF
C9 0.1µF
C10 1.0µF
C11 0.1µF
C12 68pF
C13 0.1µF
C14 0.1µF
C15 1000pF
R1 OPEN
R2 0Ω (short)
R3 1kΩ
R4 1.0kΩ
R5 2.0kΩ
R6 51Ω
R7 100Ω
R8 100Ω
R9 OPEN
L1
L2
L3
L4
L5
FLT1
FLT2
X1
0.15µH PM20-R15M
0.15µH PM20-R15M
0.47µH PM20-R47M
OPEN
OPEN
455kHz SFGCC 455BX-TC
455kHz SFGCC 455BX-TC
82.705MHz CTS XTAL 020-3249-042
* NOTE: These components are optional and depend on user matching requirements.
Pads are provided on the demo board.
R2 and R9 set the RSSI buffer gain. For unity gain short R2 (Pin 7 to Pin 8)
and leave R9 open.
October 27, 1993
Figure 2. SA637 Application Circuit
10
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