A dual 18-bit successive approximation CMOS analog-to-digital converter is described with serial data outputs for digital audio applications. The dual a/d converters employ the switched capacitor architecture which also provides an inherent co-phase sample/hold operation for each channel. This low power circuit includes a low-noise band-gap reference and reference buffer amplifiers to drive each of the CDACs. Fast-settling circuits, including latching comparators, permit conversion rates of 1x, 2x or 4x oversampling. Laser trimming of a -trim-DAC- produces performance levels of 0.0025% THD+N and 92dB SNR.

Author: Naylor, Jimmy R.
Affiliation: BURR-BROWN CORPORATION
AES Conference: 7th International Conference: Audio in Digital Times (May 1989)
Paper Number: 7-013
Publication Date: May 1, 1989 Import into BibTeX
Subject: Audio in Digital Times
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=5483

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