PT2254 データシートの表示（PDF） - Princeton Technology
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PT2254 Datasheet PDF : 7 Pages
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Princeton Technology Corp.
Electronic Volume Controller IC
APPLICATION CIRCUIT 4
Single Power Supply
Tel : 886-2-29162151
Fax : 886-2-29174598
URL: http://www.princeton.com.tw
PT2254A
INPUT
OUTPUT
ST
10K 10 F
+
100 F
10K
+
+
10 F
CK
D ATA
Vcc (4 ~ 12 V)
Vss
Vcc
L-OUT1 R-OUT1
L-IN1
R-IN1
A-GND A-GND
L-IN2
R-IN2
L-OUT2 R-OUT2
ST
D ATA
GND
CK
PT2254A
3+
8
1
- 2 L M 358
4
68 pF
0.15uF
51 K
110 K
Note: The OP and R,C components form a bandpass filter. Its fL(Low Frequency at –3dB
point) is about 20 Hz, fH (High Frequency at –3dB point) is about 22 KHz and the flat
gain (A0) is 3.15. Therefore, there is a limitation on the input voltage source: (i) The
amplitude should not be more than 1 Vrms, (ii) The bandwidth of input should be within
the range of 20 to 22 K; otherwise too much distortion will be generated.
PT2254A v 2.4
Page 6
Revised August 1998
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