PT2253A 查看數據表（PDF） - Princeton Technology
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PT2253A Datasheet PDF : 20 Pages
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Electronic Volume Controller IC
PT2253A
ATTENUATION DISPLAY OUTPUT
PT2253A has a DC Current Output Pin (DCO). The output level is divided into 13 steps. Please refer to
the table below:
Step
DCO
Attenuation
0
0
-64dB ~ ∞
1
I
-60dB ~ -62dB
2
2I
-54dB ~ -58dB
3
3I
-50dB ~ -52dB
4
4I
-44dB ~ -48dB
5
5I
-40dB ~ -42dB
6
6I
-34dB ~ -38dB
7
7I
-30dB ~ -32dB
8
8I
-24dB ~ -28dB
9
9I
-20dB ~ -22dB
10
10I
-14dB ~ -18dB
11
11I
-10dB ~ -12dB
12
12I
-4dB ~ - 8dB
13
13I
0dB ~ -2dB
Current value may fluctuate depending on the IC. When high precision is required, use a variable
resistor as a load resistor.
8
1K
Vss
STEP 0
4
3
2
1
13
12
11
10
9
8
7
6
5
About 100mV + 30mV
About 1.3 V
Vss
PT2253A V2.8
-6-
December, 2005
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