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ADAU1761BCPZ-R7 数据表(PDF) 63 Page - Analog Devices |
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ADAU1761BCPZ-R7 数据表(HTML) 63 Page - Analog Devices |
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63 / 93 page ![]() Data Sheet ADAU1761 Rev. D | Page 63 of 93 R13: ALC Control 2, 16,403 (0x4013) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 ALCATCK[3:0] ALCDEC[3:0] Table 47. ALC Control 2 Register Bits Bit Name Description [7:4] ALCATCK[3:0] ALC attack time. The attack time sets how fast the ALC starts attenuating after an increase in input level above the target. A typical setting for music recording is 384 ms, and a typical setting for voice recording is 24 ms. Setting Attack Time 0000 6 ms (default) 0001 12 ms 0010 24 ms 0011 48 ms 0100 96 ms 0101 192 ms 0110 384 ms 0111 768 ms 1000 1.54 sec 1001 3.07 sec 1010 6.14 sec 1011 12.29 sec 1100 24.58 sec 1101 49.15 sec 1110 98.30 sec 1111 196.61 sec [3:0] ALCDEC[3:0] ALC decay time. The decay time sets how fast the ALC increases the PGA gain after a decrease in input level below the target. A typical setting for music recording is 24.58 seconds, and a typical setting for voice recording is 1.54 seconds. Setting Decay Time 0000 24 ms 0001 48 ms 0010 96 ms 0011 192 ms 0100 384 ms 0101 768 ms 0110 1.54 sec 0111 3.07 sec 1000 6.14 sec 1001 12.29 sec 1010 24.58 sec 1011 49.15 sec 1100 98.30 sec 1101 196.61 sec 1110 393.22 sec 1111 786.43 sec |
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