AD1837AS

Overview

The AD1837AS is a high-performance single-chip audio codec manufactured by Analog Devices Inc. It features four 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 pair. It utilizes multibit Sigma-Delta modulators for high fidelity, offering 105 dB SNR for ADCs and 108 dB SNR for DACs. The codec operates from a 5 V supply with a 3.3 V tolerant digital interface. It includes on-chip volume controls, clickless mutes, and flexible serial data ports compatible with I2S, DSP, and TDM formats.

Feature Summary

• Multibit Sigma-Delta modulation technology ensures perfect differential linearity and reduced idle tones.
• Integrated digital filters provide high stop-band attenuation and linear phase response.
• Flexible serial interface supports multiple data formats including I2S, left-justified, right-justified, and DSP modes.
• On-chip volume control allows independent adjustment per channel with 1024-step linear scaling.

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 'AS' corresponds to the industrial temperature range of -40°C to +85°C and the 52-lead MQFP package. Confirm that the component matches the REV B datasheet specifications. Ensure compatibility with system power supplies and clock requirements before integration.

Selection Notes

Select this component when a multi-channel audio solution with high dynamic range is required. It is suitable for systems needing four stereo outputs and two stereo inputs. Consider the 3.3 V digital interface tolerance if interfacing with lower voltage logic controllers. Verify clock jitter specifications to maintain optimal signal integrity.

Part Context

The AD1837AS belongs to the Analog Devices AD1837 series of audio codecs. It is designed for professional and consumer audio applications requiring high channel counts and low distortion. The device integrates advanced digital filtering and modulation techniques to deliver superior audio performance in a compact plastic package.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Consult Analog Devices documentation for potential cross-references or updated product lines.