AD1938WBSTZ

Overview

The AD1938WBSTZ is a high-performance, single-chip audio codec manufactured by Analog Devices Inc. It integrates four analog-to-digital converters (ADCs) with differential inputs and eight digital-to-analog converters (DACs) with single-ended outputs. The device utilizes a patented multibit sigma-delta architecture and operates from a 3.3 V supply. It supports sample rates from 8 kHz to 192 kHz with 24-bit resolution. Key electrical specifications include a DAC dynamic range of 108 dB and an ADC dynamic range of 107 dB. The component features an on-chip PLL for clock generation, SPI control interface, and automotive qualification.

Feature Summary

• Integrates four differential ADC channels and eight single-ended DAC channels within a single package.
• Features low EMI design utilizing continuous time architectures and on-chip PLL to minimize emissions.
• Includes software-controllable clickless mute, log volume control with autoramp, and power-down modes.
• Supports multiple data formats including right-justified, left-justified, I2S-justified, and TDM modes.

Applications

• Automotive audio systems
• Home Theater Systems
• Set-top boxes
• Digital audio effects processors

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure the component meets the required automotive qualification standards if used in vehicle applications. Cross-reference pin configurations with official documentation to prevent integration errors during PCB layout.

Selection Notes

Select this model when a high channel count with single-ended DAC outputs is required. Verify that the system can accommodate the 48-lead LQFP package dimensions. Confirm that the application requires the specific dynamic range and THD+N specifications provided in the analog performance tables. Check compatibility with the host microcontroller's SPI interface capabilities.

Part Context

This component belongs to the AD193x family of audio codecs. It is distinguished by its single-ended DAC output configuration and SPI control interface. Other family members may offer differential DAC outputs or I2C control ports. The AD1938WBSTZ specifically denotes the lead-free, RoHS-compliant version in the LQFP-48 package.

Replacement Considerations

Direct replacements within the same family include parts with differential DAC outputs or different control interfaces. Verify pin compatibility before substitution. Consult the manufacturer's ordering guide for updated part numbers and availability status.