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參數(shù)資料
| 型號(hào)： | MC2800 |
| 廠商： | Motorola, Inc. |
| 英文描述： | FSK FM IF Receiver(FSK FM IF 接收器) |
| 中文描述： | FSK信號(hào)調(diào)頻（FSK信號(hào)調(diào)頻中頻接收器中頻接收機(jī)） |
| 文件頁(yè)數(shù)： | 7/28頁(yè) |
| 文件大?。?/td> | 473K |
| 代理商： | MC2800 |
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MC2800
7
MOTOROLA RF/IF DEVICE DATA
PIN FUNCTION DESCRIPTION
Pin
Symbol
Schematic (Excluding ESD)
Description
1
EN
VDD
1.0 k
1
EN
Enables the circuit.
2
CL
(Precharge and
Reset)
VDD
1.0 k
2
CL
This pin is used to precharge the circuit to
accelerate the initial start–up process
(particularly the 4.7
μ
F capacitor at Pin 10).
3
4
R1
R2
VDD
3 or 4
R1
or
R2
These pins are set to “high” or “l(fā)ow”. They are
used for the selection of the filter’s symbol
rate.
5
BRF Out
2.2 nF
BRF1
BRF Out
7
5
2R
VCC
Symbol Rate Filter Output for connection of
feedback capacitor. This is also the audio
output before A/D.
6
BRF2
0.9 V
8
2R
R
Det
Out
Symbol Rate Filter Input for connection of filter
capacitor.
7
BRF1
BRF2
22 nF
6
Symbol Rate Filter Input.
8
Det Out
3.3 nF
10 k
VCC
Det
Out
8
50 k
Audio output from FSK FM detector. This pin is
also audio input for testing purposes (signal of
100 mVpp with DC offset of 0.9 V).
9
Gnd
Gnd
9
Demodulator,
Bit Rate Filter,
A/D, Logic, Ref.
Ground pin for IC covering Pins 1 through 13
and 27 through 32.
NOTE:
Care in PCB layout should be taken to avoid compromising of sensitivity performance.
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