AD1838AAS-REEL

Overview

The AD1838AAS-REEL is a high-performance single-chip audio codec manufactured by Analog Devices Inc. It features three stereo digital-to-analog converters (DACs) and one stereo analog-to-digital converter (ADC). The device supports sample rates up to 96 kHz, with 192 kHz available on one DAC channel. It utilizes multibit Sigma-Delta modulators for high fidelity, offering 24-bit resolution. Key electrical specifications include an ADC dynamic range of 105 dB and a DAC dynamic range of 108 dB. Both converters achieve a Total Harmonic Distortion + Noise (THD+N) of -95 dB. The component operates within a supply voltage range of 4.5 V to 5.5 V and functions in temperatures from -40°C to +85°C.

Feature Summary

• Features three independent stereo DACs and one stereo ADC with differential outputs for optimized noise performance.
• Includes on-chip volume controls per channel with 1024-step linear scale and software-controllable clickless mute functions.
• Supports flexible serial data interfaces including Right-Justified, Left-Justified, I2S Compatible, and DSP Serial Port modes.
• Capable of TDM interface mode supporting 8 In/8 Out using a single SHARC SPORT connection.

Applications

• DVD Video and Audio Players
• Home Theater Systems
• Automotive Audio Systems

Procurement Notes

Verify the obsolete status of this component before design implementation. Confirm that the REEL suffix indicates tape-and-reel packaging suitable for automated assembly. Ensure compatibility with existing PCB footprints for the 52-lead MQFP package. Check for availability of lead-free variants if required by current environmental regulations.

Selection Notes

Select this component for applications requiring multiple isolated stereo audio channels from a single chip. It is suitable for systems needing 3.3 V tolerant digital interfaces alongside 5 V analog supplies. Consider the specific clocking requirements for 192 kHz operation on the primary DAC channel when designing the master clock circuitry.

Part Context

This part belongs to the AD1838A series of high-performance audio codecs. It is functionally similar to the AD1839 but offers a different channel configuration. The device is designed for glueless connection to various DSP chips and sample rate converters. It shares the same 52-lead MQFP package option as other variants in the family.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material.