Texas Instruments introduced a pair of 24-bit audio analog-to-digital converters (ADCs) designed for professional and broadcast audio applications. The PCM4202 (2-channel) and PCM4204 (4-channel) feature 118dB dynamic range, -105dB total harmonic distortion and up to 216kHz sampling rate.
The PCM4202 and PCM4204 architecture utilizes a delta-sigma ADC per channel incorporating a modulated dither topology for improved dynamic performance. Both devices support 24-bit linear PCM output data, with sampling frequencies up to 216kHz, and can be configured to output either 64x or 128x oversampled, 1-bit direct stream digital (DSD) data for each channel. The DSD input mode allows 1-bit DSD to 24-bit PCM data format conversion by utilizing the internal digital decimation filter.
The PCM4202 and PCM4204 include a audio serial port interface, which supports standard PCM audio and time division multiplexed (TDM) data formats. The devices operate from a +5V analog power supply and a +3.3V digital power supply. The digital I/O is compatible with +3.3V logic families.
The PCM4204 is packaged in a HTQFP-64 PowerPADT. The PCM4202 is packaged in a SSOP-28. Both devices are available now from TI and its authorized distributors. Evaluation modules (EVMs) are available for both devices.
