wm8988 Wolfson Microelectronics plc, wm8988 Datasheet - Page 45

• Manufacturer Part Number: wm8988
• Description: Stereo Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Production Data
w
SAVING POWER AT HIGHER SUPPLY VOLTAGES
The analogue supplies to the WM8988 can run from 1.8V to 3.6V. By default, all analogue circuitry
on the device is optimized to run at 3.3V. This set-up is also good for all other supply voltages down
to 1.8V. At lower voltages, performance can be improved by increasing the bias current. If low
power operation is preferred the bias current can be left at the default setting. This is controlled as
shown below.
R23 (17h)
Additional
Control(1)
REGISTER
ADDRESS
7:6
BIT
VSEL
[1:0]
LABEL
11
DEFAULT
Analogue Bias optimization
00: Highest bias current, optimized for
AVDD=1.8V
01: Bias current optimized for AVDD=2.5V
1X: Lowest bias current, optimized for AVDD=3.3V
DESCRIPTION
PD, Rev 4.0, October 2008
WM8988
45