adau1781bcpz-rl Analog Devices, Inc., adau1781bcpz-rl Datasheet - Page 67
adau1781bcpz-rl
Manufacturer Part Number
adau1781bcpz-rl
Description
Low Noise Stereo Codec With Sigmadsp Processing Core
Manufacturer
Analog Devices, Inc.
Datasheet
1.ADAU1781BCPZ-RL.pdf
(88 pages)
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Register 16410 (0x401A), Left ADC Attenuator
Bits[7:0], Left ADC Digital Attenuator
These bits control a 256-step, logarithmically spaced volume
control from 0 dB to −95.625 dB, in increments of 0.375 dB.
When a new value is entered into this register, the volume control
slews gradually to the new value, avoiding pops and clicks in the
process. The slew ramp is logarithmic, incrementing 0.375 dB
per audio frame.
Table 51. Left ADC Attenuator Register
Bits
[7:0]
Table 52. Right ADC Attenuator Register
Bits
[7:0]
Description
Left ADC digital attenuator; attenuation is in increments of 0.375 dB with each step of slewing
00000000: 0 dB
00000001: −0.375 dB
00000010: −0.75 dB
…
11111110: −95.25 dB
11111111: −95.625 dB
Description
Right ADC digital attenuator; attenuation is in increments of 0.375 dB with each step of slewing
00000000: 0 dB
00000001: −0.375 dB
00000010: −0.75 dB
…
11111110: −95.25 dB
11111111: −95.625 dB
Rev. 0| Page 67 of 88
Register 16411 (0x401B), Right ADC Attenuator
Bits[7:0], Right ADC Digital Attenuator
These bits control a 256-step, logarithmically spaced volume
control from 0 dB to −95.625 dB, in increments of 0.375 dB.
When a new value is entered into this register, the volume control
slews gradually to the new value, avoiding pops and clicks in the
process. The slew ramp is logarithmic, incrementing 0.375 dB
per audio frame.
ADAU1781
Default
00000000
Default
00000000
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