參數(shù)資料
型號(hào): LA1787M
元件分類: 接收器
英文描述: AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64
封裝: 14 X 14 MM, QFP-64
文件頁數(shù): 7/54頁
文件大?。?/td> 606K
代理商: LA1787M
No. 6655-15/54
LA1787M
Pin No.
Function
Description
Equivalent circuit
45
IF output
The IF amplifier load
+
42
DET
44
VCC
C
2.2
F
0.022
F
50k
50k
240k
G1
10
SEEK
ON
IF
AGC
A13583
45
DET
Pin 40 VCC
A13584
46
VCC
50pF
100
20k
ANT DAMPING
DRIVER
W.AGC AMP.
A13585
Continued from preceding page.
Continued on next page.
G1; Used for time constant
switching during seeks.
Reception
τ = 2.2 F × 300 k
44
IF AGC
Seek
τ = 2.2 F × 10
The external capacitors are
connected to VCC.
This is because the IF amplifier
operates referenced to VCC.
AM antenna damping
I46 = 6 mA (maximum)
46
drive output
This is the antenna damping
Wide band AGC input
current.
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