AD1837AASZ

Overview

The AD1837AASZ 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 the first DAC channel. It utilizes multibit Sigma-Delta modulators for high fidelity conversion. Key electrical specifications include a dynamic range of 105 dB for ADCs and 108 dB for DACs, with total harmonic distortion plus noise of -95 dB and -92 dB respectively. The component operates within a supply voltage range of 4.5 V to 5.5 V and functions in an industrial temperature range from -40°C to +85°C.

Feature Summary

• Features four independent stereo DAC channels and one stereo ADC channel with integrated volume controls and clickless mute functions.
• Supports flexible serial data interfaces including I2S, left-justified, right-justified, and DSP modes, along with TDM interface capabilities.
• Incorporates multibit Sigma-Delta modulators with perfect differential linearity restoration to minimize idle tones and noise floor artifacts.

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 'ASZ' confirms lead-free compliance as indicated in official documentation. Confirm current availability status through authorized distributors, as supply conditions may vary. Ensure the procurement source provides valid traceability and authenticity guarantees for this Analog Devices component.

Selection Notes

Select this component when designing systems requiring multiple independent stereo outputs or inputs within a single package. Consider the 3.3 V tolerant digital interface if interfacing with lower voltage logic controllers. Evaluate the power-down modes and soft power-down capabilities against system energy efficiency requirements.

Part Context

This part belongs to the AD1837A series of audio codecs. It is housed in a 52-lead MQFP plastic package. The 'Z' suffix denotes a lead-free manufacturing process compliant with RoHS standards. It is designed for integration into complex audio processing architectures requiring high channel counts.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material. Consult Analog Devices technical support for cross-reference recommendations based on specific application constraints.

FAQ

What is the maximum sample rate supported by the AD1837A?

The AD1837A supports sample rates up to 96 kHz for all channels. However, the first DAC channel specifically supports a sample rate of 192 kHz.

How does the AD1837A handle digital interface compatibility?

The device features a flexible serial data port that supports Right-Justified, Left-Justified, I2S Compatible, and DSP Serial Port modes. It also includes a TDM interface mode for connecting to SHARC DSPs.

What is the purpose of the Data Directed Scrambling feature?

Data Directed Scrambling makes the DACs least sensitive to jitter, thereby improving overall signal integrity and reducing noise sensitivity in the audio output.