AD1836AAS

Overview

The AD1836AAS is a high-performance, single-chip audio codec manufactured by Analog Devices Inc. It utilizes a patented multibit Sigma-Delta architecture to provide three stereo digital-to-analog converters (DACs) and two stereo analog-to-digital converters (ADCs). The device operates from a 5 V supply with separate analog and digital power domains. It supports data resolutions of 16, 18, 20, or 24 bits and sample rates up to 96 kHz. Key electrical specifications include an ADC dynamic range of 105 dB and a DAC dynamic range of 108 dB under A-weighted conditions. The component features on-chip volume control, programmable gain amplifiers, and flexible serial data interfaces compatible with I2S, DSP, and TDM modes.

Feature Summary

• Multichannel audio processing with three stereo DACs and two stereo ADCs using multibit Sigma-Delta modulation.
• Integrated SPI control port for adjusting volume, gain, and operational parameters.
• Flexible serial data interface supporting multiple formats including I2S, left/right justified, and DSP modes.
• On-chip volume control with auto-ramp function and hardware/software controllable clickless mute.

Applications

• Home theater systems
• Automotive audio systems
• DVD recorders
• Set-top boxes
• Digital audio effects processors

Procurement Notes

Verify the specific suffix 'AS' against the manufacturer's current ordering guide to confirm package type and temperature grade. Confirm availability status as distribution channels may list this component as obsolete or end-of-life. Ensure compliance with RoHS directives if required for the target assembly process.

Selection Notes

Select this component when a multichannel codec with high dynamic range and differential outputs is required. Verify that the system master clock can be provided at 256x, 512x, or 768x the sample rate. Ensure the host microcontroller supports the required SPI control protocol and serial data formats. Check that the 5 V supply voltage aligns with the system power architecture.

Part Context

The AD1836A belongs to the AD1836A series of multichannel audio codecs. It is designed for applications requiring multiple independent audio channels within a single integrated circuit. The device integrates both analog and digital sections, simplifying board layout compared to discrete solutions. It is part of Analog Devices' portfolio of high-fidelity audio interface components.

Replacement Considerations

Consult the Analog Devices ordering guide for direct pin-compatible alternatives or updated revisions. Verify functional equivalence regarding channel count, resolution, and interface compatibility before substitution.

FAQ

What is the maximum sample rate supported by the AD1836A?

The AD1836A supports sample rates up to 96 kHz.

How many analog inputs and outputs does the device provide?

The device provides two stereo ADC pairs (four input channels) and three stereo DAC pairs (six output channels).

Is the serial data interface compatible with standard audio protocols?

Yes, it supports I2S, left justified, right justified, and DSP serial port modes.