TLV320AIC28

The TLV320AIC28 is a low-power, high-performance audio codec with 16/20/24/32-bit 95-dB stereo playback, mono record functionality at up to 48 ksps. Two microphone inputs of TLV320AIC28 include independent programmable bias voltages, built-in pre-amps, and hardware automatic gain control, with single-ended or fully-differential signal input capabilities.

The stereo 16-Ω headphone drivers on the TLV320AIC28 support capless as well as ac-coupled output configurations. An 8-Ω BTL differential speaker driver provides up to 400 mW of power and 98-dB SNR, while a differential driver is also available for driving a 32-Ω speaker or telephone earpiece. A programmable digital audio effects processor enables bass, treble, midrange, or equalization playback processing. The digital audio data format of TLV320AIC28 is programmable to work with popular audio standard protocols (I2S, DSP, left/right justified) in master or slave mode, and also includes an on-chip programmable PLL for flexible clock generation capability. Highly configurable software power control of TLV320AIC28 is provided, enabling 48 ksps stereo audio playback to 16-Ω headphones at 19 mW with a 3.3-V analog supply level.

The TLV320AIC28 offers a 12-bit measurement ADC and internal reference voltage. It includes an on-chip temperature sensor capable of reading 0.3°C resolution, as well as a battery measurement input capable of reading battery voltages up to 6 V, while operating at an analog supply as low as 3 V. The TLV320AIC28 is available in a 48-lead 7 x 7 mm QFN package.