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DESCRIPTION
The WM8953 is a low power high performance stereo ADC
designed for mobile handsets and other portable devices.
Four single-ended or differential input connections are provided,
with up to 60dB of analogue gain in each input path. Stereo 24-
bit sigma-delta ADCs provide hi-fi quality audio recording of
microphones or line input. A programmable high pass filter is
available in the ADC path for removing DC offsets and
suppressing wind and other low frequency noise.
A low noise microphone bias with programmable current detect
and short-circuit detect is provided.
A flexible digital audio interface supports most commonly-used
clocking schemes. The audio interface supports TDM and
tristate outputs allow multiple devices to share the same
interface.
An integrated low power PLL provides support for most
commonly-used audio sample rates.
The WM8953 is supplied in very small and thin 42-ball WCSP
package, ideal for portable systems.
WM8953
Low Power Stereo ADC with PLL and TDM Interface
FEATURES
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SNR 94dB (‘A’ weighted)
THD -82dB at 48kHz, 3.3V
Full stereo microphone / line input interface
Low noise MICBIAS
Low power consumption
Full analogue and digital volume control
PLL provides flexible clocking scheme
2-wire, 3-wire or 4-wire control
Sample rates: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48kHz
GPIO functions available
Digital supply: 1.71V – 3.6V
Analogue supply: 2.7V – 3.6V
W-CSP package (3.226 x 3.44 x 0.7mm, 0.5mm pitch)
APPLICATIONS
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Multimedia phones
General purpose low power audio ADC
WOLFSON MICROELECTRONICS plc
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Production Data, January 2009, Rev 4.0
Copyright
©2009
Wolfson Microelectronics plc
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
