AD1839AASZ

Overview

The AD1839AASZ 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 modulation for high fidelity, offering 24-bit resolution. Key performance metrics include an ADC dynamic range of 105 dB and a DAC dynamic range of 108 dB. The codec operates from a 5 V supply with a 3.3 V tolerant digital interface and is housed in a 52-lead MQFP package.

Feature Summary

• Integrates three independent stereo DAC channels and one stereo ADC channel within a single chip.
• Features software-controllable clickless mute functions and per-channel volume control with 1024 linear steps.
• Supports flexible serial data interfaces including I2S, left-justified, right-justified, and DSP modes.
• Includes TDM interface mode allowing 8-in/8-out operation using a single SHARC SPORT connection.

Applications

• DVD video and audio players
• Home theater systems
• Automotive audio systems
• Audio/visual receivers
• Digital audio effects processors

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package and temperature grade. Check for RoHS compliance documentation as required by regional regulations. Ensure proper ESD handling procedures are followed during storage and installation to prevent damage to the sensitive internal circuitry.

Selection Notes

Select this component when multiple independent stereo outputs are required from a single codec source. Verify that the system clock architecture supports the necessary master clock frequencies for the desired sample rate. Ensure the host processor can accommodate the SPI control port and serial data formats. Consider power supply isolation requirements between analog and digital sections to maintain specified signal-to-noise ratios.

Part Context

The AD1839A belongs to the AD1839 series of high-performance audio codecs from Analog Devices. It is designed for professional and consumer audio applications requiring multi-channel output capabilities. The device complements other members of the family by providing additional DAC channels compared to stereo-only variants, making it suitable for surround sound configurations.

Replacement Considerations

The AD1839A is functionally similar to the AD1839 but may differ in manufacturing revisions or packaging details. Verify pin compatibility and register mapping before substitution. Other Analog Devices codecs like the AD1836 or AD1838 offer different channel counts and should be evaluated based on specific input/output requirements.