DESCRIPTION

The WM8948 is a highly integrated low power hi-fi CODEC designed for portable devices such as digital still cameras.

Up to 6 analogue inputs may be connected; a 2-channel digital microphone interface is also provided. Flexible output mixing options support single-ended and differential configurations, with outputs derived from the digital audio paths or from analogue bypass paths. Twin stereo outputs or stereo line and mono BTL headphone/speaker drive may be supported.

FEATURES

• Hi-fi audio CODEC

- 94dB SNR during ADC recording (‘A’ weighted)

- 96dB SNR during DAC playback (‘A’ weighted)

• 6 analogue audio inputs

• Integrated bias reference for electret microphones

• 2-channel digital microphone interface

• Powerful digital mixing / DSP functions:

- 3D-stereo enhancement

- 5-notch filters

- 5-band equalizer (EQ)

- ReTune™ parametric filter

- Dynamic range control and noise gate

- Low-pass/High-pass filters

- Direct Form 1 (DF1) programmable digital filter

• Digital beep generator

• 4 analogue audio outputs

• Stereo line output

• Mono BTL headphone/speaker output driver

• I2S digital audio interface - sample rates 8kHz to 48kHz

• Frequency Locked Loop (FLL) frequency conversion / filter

• Video buffer function

• 4-wire Touch Panel interface controller

• Auxiliary ADC for DC measurement or battery monitoring

• Integrated LDO low-noise voltage regulator

• 36-ball W-CSP package (2.96 x 3.06 x 0.7mm, 0.5mm pitch)

APPLICATIONS

• Digital Still Cameras (DSC)

• Multimedia phones