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參數資料
| 型號： | AN5285K |
| 廠商： | PANASONIC CORP |
| 元件分類： | 消費家電 |
| 英文描述： | Sound level automatic gain control IC |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PSIP10 |
| 封裝： | PLASTIC, SSIP-10 |
| 文件頁數： | 1/5頁 |
| 文件大小： | 57K |
| 代理商： | AN5285K |
ICs for TV
AN5285K
Sound level automatic gain control IC
1
I
Overview
The AN5285K is a stereo automatic volume control
IC for reducing a difference in volume between broad-
casting stations and between programs. It is a kind of
AGC circuit and reduces a sudden change in sound sig-
nal amplitude by using a proper time constant.
I
Features
Sound level AGC function by VCA gain control
Prevention of S/N ratio degradation by reducing VCA
gain at no signal (typ. 20 mV[rms] or less)
AGC function can be switched on and off externally.
Operating point of VCA gain lowering is adjustable by
means of external resistor.
Usable for stereo sound system (also usable for monau-
ral sound system) by two VCAs
I
Applications
Televisions and video sets
SSIP010-P-0000
Unit: mm
I
Block Diagram
10
1
1
0
3
0
1
1
+
–
1
6.0±0.3
(12.0)
1
3.5±0.25
50 k
50 k
V
R
5
L
2
L
9
G
6
VCA
VCA
CTL
SW
Level
sensor 1
ROUT
8
RIN
10
CTL
7
LIN
1
LOUT
3
Level
sensor 2
Level
sensor 1
V/l reg.
V
C
4
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