PT2257 查看數據表（PDF） - Princeton Technology
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PT2257 Datasheet PDF : 16 Pages
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Electronic Volume Controller IC
+0
-20
-40
d
B
-60
V
-80
No Weighted
A-Weighted
-100
-120
20 50 100 200 500 1k 2k 5k 20k
Hz
Residual Noise Floor
1
0.5
0.2
0.1
0.05
%
0.02
0.01
0.005
Vo=2.5Vrms
Vo=1Vrms
Vo=0.2Vrms
0.002
0.001
20 50 100 200 500 1k 2k 5k 20k
Hz
THD vs. Frequency
+0
-20
-40
-60
d
B
-80
-100
-120
-140
20 50 100 200 500 1k 2k 5k 20k
Hz
Crosstalk
20
5
1
%
0.1
0.01
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PT2257
VCC=3V
VCC=5V
VCC=9V
0.001
1m
10m
100m
1 24
Vrms
THD vs. Output Level, RL=50KΩ
20
10
1
%
0.1
0.01
0.001
1m 2m 10m
100m 500m 1 2 4
Vrms
THD vs. Output Level, RL=5KΩ
20
10
5
2
1
%
0.1
0.02
0.01
0.001
1m 2m 10m
100m 500m 1 2 4
Vrms
THD vs. Output Level, RL=2KΩ
PT2257 V1.4
- 11 -
May, 2008
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