The AD1938 is a high performance, single-chip codec that pro-vides four analog-to-digital converters (ADCs) with input and eight digital-to-analog converters (DACs) with single-ended output using the Analog Devices, Inc., patented multibit sigma-delta (Σ-Δ)architecture. An SPI port is included, allowing a microcontrollerto adjust volume and many other parameters. The AD1938 operates from 3.3 V digital and analog supplies.The AD1938 is available in a 48-lead (single-ended output)LQFP package. Other members of this family include a diffe-rential DAC output and I2C® control port version.
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