ACS422A68TAGZBX8 IDT, ACS422A68TAGZBX8 Datasheet - Page 34

• Manufacturer Part Number: ACS422A68TAGZBX8
• Description: Interface - CODECs
• Manufacturer: IDT

Specifications of ACS422A68TAGZBX8

• Rohs: yes
• Part # Aliases: IDTACS422A68TAGZBX8

ACS422x68
LOW-POWER, HIGH-FIDELITY, INTEGRATED CODEC
©2011 INTEGRATED DEVICE TECHNOLOGY, INC.
R2 (00h)
HPVOLL
R3 (01h)
HPVOLR
3.14. Analog Outputs
Register Address
3.14.1. Headphone Output
The HPOut pins can drive a 16 or 32 headphone or alternately drive a line output. The signal vol-
ume of the headphone amplifier can be independently adjusted under software control by writing to
HPVOL_L and HPVOL_R. Setting the volume to 0000000 will mute the output driver; the output
remains at ground, so that no click noise is produced when muting or un-muting.
Gains above 0dB run the risk of clipping large signals.
To minimize artifacts such as clicks and zipper noise, the headphone and BTL outputs feature a vol-
ume fade function that smoothly changes volume from the current value to the target value.
3.14.1.1. Headphone Volume Control Registers
Bit
6:0
6:0
7
7
HPVOL_R
HPVOL_L
RSVD
RSVD
Label
[6:0]
[6:0]
Table 37. HPVOL L/R Registers
Type
RW
RW
R
R
1110111
1110111
Default
(0dB)
0
0
34
Reserved
Left Headphone Volume
1111111 = +6dB
1111110 = +5.25dB
…
1110111 = 0dB
...
0000001 = -88.5dB
0000000 = Analog mute
Note: If HPVOLU is set, this setting will take effect after
the next write to the Right Input Volume register.
Reserved
Right Headphone Volume
1111111 = +6dB
1111110 = +5.25dB
…
1110111 = 0dB
...
0000001 = -88.5dB
0000000 = Analog mute
Description
ACS422X68
V1.6 01/13