AD1838AASZ

Overview

The AD1838AASZ 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 for both ADC and DAC channels, with the first DAC channel capable of operating at 192 kHz. It utilizes multibit sigma-delta modulators to achieve a dynamic range of 105 dB for the ADC and 108 dB for the DAC. The codec operates on a 5 V supply with a separate 3.3 V tolerant digital interface. It includes an SPI-compatible control port, on-chip volume controls with 1024 linear steps, and software-controllable clickless mutes. The component is housed in a 52-lead MQFP package.

Feature Summary

• Multibit Sigma-Delta Modulation: Employs patented multibit sigma-delta technology for both ADC and DAC sections to ensure perfect differential linearity and reduce idle tones.
• Flexible Serial Interface: Supports multiple data formats including I2S, Left-Justified, Right-Justified, and DSP modes, along with TDM interface capabilities.
• Integrated Control Features: Includes independent per-channel volume controls with 1024 linear steps and software-controllable clickless mute functions for both conversion sections.
• Differential Output Architecture: Provides fully differential analog outputs for all DAC channels to optimize noise performance and signal integrity.

Applications

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

Procurement Notes

Verify the specific ordering suffix when sourcing components. The 'Z' suffix indicates a lead-free part compliant with RoHS standards. Confirm that the package option matches the required footprint, as the standard configuration utilizes a 52-lead MQFP plastic package. Ensure compatibility with industrial temperature ranges if deployed in automotive or harsh environments.

Selection Notes

Select this component for applications requiring high-fidelity multi-channel audio processing with low distortion. Verify that the system clock architecture can support the required master clock frequencies, typically 256 times the sample rate. Ensure the host processor supports the SPI control interface for register configuration and that the power supply design accommodates separate analog and digital rails for optimal performance.

Part Context

The AD1838AASZ belongs to the AD1838 family of audio codecs from Analog Devices. It is designed for professional and consumer audio equipment requiring multiple output channels. The device integrates advanced digital filtering and modulation techniques to deliver high dynamic range performance within a single integrated circuit solution.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official manufacturer resources for current product lifecycle status and potential cross-reference options.