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SM7153 Datasheet(PDF) 4 Page - SamHop Microelectronics Corp. |
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SM7153 Datasheet(HTML) 4 Page - SamHop Microelectronics Corp. |
4 / 9 page Page 4 (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. 100 µA/step is transmitted. TABLE 1 2 Step 0 1 2 3 4 5 6 7 8 9 10 11 12 13 DCO 0 I = 100μA + 30μA 2 x I 3 x I 4 x I 5 x I 6 x I 7 x I 8 x I 9 x I 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 1 3 4 5 6 7 8 9 10 11 12 13 STEP 0 ABOUT 100mV + 30mV VSS ABOUT 1.3V Figure 3 8 1K Ω VSS When high precision is required, use a variable resistor as a load resistor. V.1.0 SM7153 SAMHOP Microelectronics Corp. 三合微科股份有限公司 ELECTRONIC VOLUME CONTROLLER |
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