DESCRIPTION
The WM8945 is a highly integrated low power hi-fi CODEC designed for portable devices such as digital still cameras.
Up to 4 analogue inputs may be connected; a 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. Mono line output and mono BTL headphone/speaker drive is supported.

FEATURES
Hi-fi audio CODEC
-  94dB SNR during ADC recording (‘A’ weighted)
-  96dB SNR during DAC playback (‘A’ weighted)
4 analogue audio inputs
Integrated bias reference for electret microphones
Digital microphone interface
Powerful digital mixing / DSP functions:
- 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
Mono 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