AD1838AAS

Overview

The AD1838AAS is a high-performance single-chip codec featuring three stereo DACs and one stereo ADC. It operates from a 5 V supply with a 3.3 V tolerant digital interface. The device supports sample rates up to 96 kHz, with 192 kHz available on one DAC. It utilizes multibit sigma-delta modulators for differential outputs. Key electrical parameters include 24-bit resolution, –95 dB THD+N for both ADCs and DACs, and 105 dB dynamic range for ADCs. The package is a 52-lead MQFP.

Feature Summary

• Multichannel audio processing with three stereo DACs and one stereo ADC
• Flexible serial data port supporting multiple standard modes
• On-chip volume control with software controllable clickless mute
• Differential analog outputs for improved noise performance

Applications

• DVD Video and Audio Players
• Home Theater Systems
• Automotive Audio Systems
• Audio/Visual Receivers
• Digital Audio Effects Processors

Procurement Notes

Verify the component status as obsolete before procurement planning. Confirm that the specific ordering suffix matches the required lead-free or reel configuration. Ensure compatibility with existing industrial temperature range specifications (-40°C to +85°C) for the target application environment.

Selection Notes

Select this component for systems requiring multiple independent stereo outputs from a single chip. Verify that the host processor supports the required serial interface formats such as I2S or DSP mode. Ensure the system design accommodates the 5 V analog supply and provides adequate filtering for the internal voltage reference pin.

Part Context

This part belongs to Analog Devices' multichannel audio codec family designed for professional and consumer audio applications. It shares architectural similarities with other devices in the series but offers a specific channel count of three stereo DACs and one stereo ADC. The device is distinct from mono or dual-channel variants within the same product line.

Replacement Considerations

Check for direct replacements such as the AD1838AASZ for lead-free compliance. Evaluate the AD1839 for applications requiring different channel configurations. Verify pinout and register compatibility when considering alternative codecs from the manufacturer.