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WM8988 Datasheet(PDF) 45 Page - Wolfson Microelectronics plc

Part # WM8988
Description  Stereo CODEC for Portable Audio Applications
PDF  56 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8988 Datasheet(HTML) 45 Page - Wolfson Microelectronics plc

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Production Data
WM8988
w
PD, Rev 4.0, October 2008
45
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.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R23 (17h)
Additional
Control(1)
7:6
VSEL
[1:0]
11
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



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