AD1836AS

Overview

The AD1836AS is a high-performance, single-chip multichannel audio codec manufactured by Analog Devices. It integrates three stereo digital-to-analog converters (DACs) and two stereo analog-to-digital converters (ADCs) utilizing a patented multibit Sigma-Delta architecture. The device operates from a 5 V supply with provisions for separate output driver supplies to interface with low-voltage external circuitry. It supports data resolutions of 16, 18, 20, or 24 bits and sample rates up to 96 kHz. Key performance metrics include an ADC dynamic range of 105 dB and a DAC dynamic range of 108 dB under A-weighted filtering conditions. The component is housed in a 52-lead MQFP plastic package.

Feature Summary

• Multichannel audio processing with three stereo DACs and two stereo ADCs using multibit Sigma-Delta modulation.
• Flexible serial data port supporting I2S, left justified, right justified, DSP modes, and TDM interfaces.
• On-chip volume control with auto-ramp function and programmable gain amplifier for ADC inputs.
• Hardware and software controllable clickless mute capability with digital de-emphasis processing.

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 RoHS compliance status as specifications are subject to change without notice. Ensure that the required master clock frequency and serial interface formats match the system design requirements before procurement.

Selection Notes

Select this component when a multichannel audio solution requiring independent channel attenuation and high dynamic range is necessary. Consider the 52-lead MQFP package constraints and the requirement for a 5 V supply voltage. Evaluate the need for separate analog and digital power supplies to minimize noise pickup in critical applications.

Part Context

The AD1836A series belongs to Analog Devices' portfolio of high-performance audio codecs designed for professional and consumer audio applications. It is often paired with Blackfin processors for software-defined radio and audio processing tasks. The device provides a glueless interface to SHARC DSPs via its auxiliary mode, simplifying system integration for complex audio routing scenarios.

Replacement Considerations

The AD1836ACS is a similar variant within the same family offering different dynamic range specifications. Verify pin compatibility and register mapping if substituting between variants. No direct cross-manufacturer replacements are documented in the provided datasheet.

FAQ

What is the maximum sample rate supported by the AD1836AS?

The AD1836AS supports a maximum sample rate of 96 kHz.

How many channels does the AD1836AS provide for audio input and output?

It provides three stereo DACs (six output channels) and two stereo ADCs (four input channels).

Can the AD1836AS interface directly with 3.3 V logic?

Yes, the digital output drivers can be powered by a 3.3 V supply connected to the ODVDD pin to interface with 3.3 V logic families.