AD1939WBSTZ-RL

Overview

The AD1939WBSTZ-RL 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 differential outputs using a multibit sigma-delta architecture. The device supports sample rates from 8 kHz to 192 kHz at 24-bit resolution. It operates on a single 3.3 V supply for both digital and analog sections, while utilizing a 5 V regulator input. Key performance metrics include a DAC dynamic range of 110 dB and an ADC dynamic range of 105 dB. The component is housed in a 64-lead LQFP package.

Feature Summary

• Features a low EMI design utilizing an on-board PLL or direct master clock to minimize emissions.
• Includes software-controllable clickless mute and log volume control with autoramp function.
• Supports multiple serial data formats including right-justified, left-justified, I2S, and TDM modes.
• Qualified for automotive applications and tolerant of 5 V logic inputs.

Applications

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

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. Confirm that the 'RL' designation corresponds to the reel packaging format required for your assembly process. Ensure compatibility with the 64-lead LQFP footprint and check for any recent product change notices regarding manufacturing sites.

Selection Notes

Select this component when a high channel count with differential outputs is required within a single package. Verify that the system can accommodate the 64-lead LQFP form factor. Ensure the application requires support for up to 192 kHz sampling rates and utilizes a 3.3 V power domain. Check if the integrated PLL functionality meets the clocking requirements without external oscillators.

Part Context

The AD1939 belongs to the AD193x family of audio codecs from Analog Devices. This series is designed for professional and consumer audio applications requiring high fidelity and low electromagnetic interference. The WBSTZ variant specifically denotes the automotive qualification and lead-free construction within the standard LQFP package offering.

Replacement Considerations

The AD1939XSTZ is a public confirmed substitute part number. Both components share identical functional specifications and pinouts but differ in automotive qualification status. Verify that the non-automotive grade meets the environmental requirements of the target application.

FAQ

How does the AD1939 handle master clock generation?

The device features an on-chip phase-locked loop (PLL) that can derive the master clock from the LR clock or an external crystal. Alternatively, it supports direct master clock inputs for bypassing the internal PLL.

What is the maximum supported sample rate?

The AD1939 supports sample rates ranging from 8 kHz up to 192 kHz.

Can the volume be controlled digitally?

Yes, the device includes a log volume control with an autoramp function that is controllable via the SPI port.