SM7153 查看數據表（PDF） - Samhop Mircroelectronics
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SM7153 Datasheet PDF : 9 Pages
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三合微科股份有限公司
SM7153
SAMHOP Microelectronics Corp. ELECTRONIC VOLUME
CONTROLLER
(2) Attenuation Display Output
The SM7153 is provided with the DC current output terminal for displaying attenuation.
With 0dB ~ ∞ divided into 13 steps, current of approx. 100µA/step is transmitted.
Step
0
1
2
3
4
5
6
7
8
9
10
11
12
13
8
STEP 0
DCO
0
I = 100μA + 30μA
2xI
3xI
4xI
5xI
6xI
7xI
8xI
9xI
10 x I
11 x I
12 x I
13 x I
Attenuation
-64 dB ~ ∞
-60dB ~ -62dB
-54dB ~ -58dB
-50dB ~ -52dB
-44dB ~ -48dB
-40dB ~ -42dB
-34dB ~ -38dB
-30dB ~ -32dB
-24dB ~ -28dB
-20dB ~ -22dB
-14dB ~ -18dB
-10dB ~ -12dB
-4dB ~ -8dB
0dB ~ -2dB
TABLE 1
13
12
11
1KΩ
VSS
10
9
8
7
ABOUT 1.3V
6
5
4
3
2
1
ABOUT 100mV + 30mV
VSS
Figure 3
When high precision is required, use a variable resistor as a load resistor.
Page 4
V.1.0
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