adau1381 Analog Devices, Inc., adau1381 Datasheet - Page 67

• Manufacturer Part Number: adau1381
• Description: Low-noise Stereo Codec With Enhanced Recording And Playback Processing
• Manufacturer: Analog Devices, Inc.

Register 16425 (0x4029), Playback Power Management
This register controls the unity current supplied to each functional
block described. Within the functional blocks, the current can
be multiplied. Normal operation has a base current of 2.5 μA,
enhanced performance has a base current of 3 μA, power saving
has a base current of 2 μA, and extreme power saving has a base
current of 1.5 μA. Enhanced performance mode offers the best
audio quality but also uses the most current.
Bit [7:6], Speaker Amplifier Bias Control
These bits control the amount of unity bias current allotted to
the speaker amplifier.
Table 55. Playback Power Management Register
Bits
[7:6]
[5:4]
[3:2]
1
0
Description
Speaker amplifier bias control
00: normal operation
01: power saving
10: enhanced performance
00: reserved
DAC bias control
00: normal operation
01: extreme power saving
10: power saving
00: enhanced performance
Back-end bias control
00: normal operation
01: extreme power saving
10: power saving
00: enhanced performance
Back-end right enable
0: disabled
1: enabled
Back-end left enable
0: disabled
1: enabled
Rev. A| Page 67 of 84
Bits[5:4], DAC Bias Control
These bits control the amount of unity bias current allotted to
the DAC.
Bits[3:2], Back-End Bias Control
These bits control the amount of unity bias current allotted to
the playback mixers and amplifiers.
Bit 1, Back-End Right Enable
This bit enables the playback mixers and amplifiers.
Bit 0, Back-End Left Enable
This bit enables the playback mixers and amplifiers.
Default
00
00
00
0
0
ADAU1381