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Wolfson Microelectronics has announced a high-performance, low-power codec (CODEC), the WM8941, with a built-in video buffer and speaker driver to enhance digital and digital video cameras. performance. The WM8941's single-channel CODEC uses four adjustable notch filters for high-quality audio recording, while its built-in video buffer makes it easy to connect directly to the TV.Wolfson Technology integrates the new CODEC, video buffer and speaker driver on an ultra-small 4x4mm chip, so the WM8941 can be easily and effectively applied to all types of digital cameras, even the smallest. of.
In terms of improving sound quality, the WM8941 is equipped with a wind noise filter and four adjustable notch filters in its analog-to-digital converter (ADC) loop, enabling the chip to be used for narrowband noise including motor and mechanical noise. Tuning and achieving suppression, further optimizing the quality of the recording and giving a richer end-user experience. In addition, its current-mode video buffer enables seamless transition from the video digital-to-analog conversion (DAC) output to the TV input and provides an adjustable gain of 0 or 6dB. At the same time, a third-order low-pass filter removes unwanted images from the unfiltered video DAC output, further ensuring the signal quality of the video buffer.
In addition to this device, Wolfson has an on-chip speaker and headphone driver to further reduce the number of external components used. The headphone driver has an output power of up to 40mW for 16" loads and has three flexible analog inputs: one auxiliary input and two microphone inputs - different architectures for single-ended and differential inputs.
The WM8941 provides a low-power solution for digital cameras that can operate from analog to 2.5V to 3.6V (or 1.7V digital power) and can be software controlled to turn off different parts of the chip. Power Supply.
The WM8941 is available in a 4x4x0.75mm, 28-pin QFN package and is sampling now. The unit price is priced at $1.79 each when purchased in quantities of 10,000.
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