AD1953YSTZRL7

Overview

The AD1953YSTZRL7 is a 26-bit, single-chip, 3-channel digital audio playback system featuring built-in SigmaDSP functionality. It operates on a 5 V supply and accepts sample rates up to 48 kHz. The device provides differential analog outputs for Left, Right, and Subwoofer channels with a signal-to-noise ratio of 112 dB (A-weighted) at 48 kHz. Key specifications include 7 biquad filter sections per channel, dual dynamic processing, and variable delay capabilities. It is housed in a 48-lead LQFP package and supports flexible serial data interfaces including I2S and DSP modes.

Feature Summary

• Integrated 26-bit DSP with double-precision arithmetic for speaker equalization, compression/limiting, and stereo spreading.
• Three-channel output configuration supporting 2.0/2.1 systems with independent processing for satellite and subwoofer channels.
• Flexible serial input port compatible with Right-Justified, Left-Justified, I2S, and DSP modes.
• On-chip parameter RAM allows control of over 200 parameters via SPI with safe-upload mode for transparent updates.

Applications

• 2.0/2.1 Channel Audio Systems
• Multichannel Automotive Sound Systems
• Home Theater Systems (AC-3 Postprocessor)
• Mini Component Stereo

Procurement Notes

Verify the specific ordering suffix RL7 against the manufacturer's current documentation to confirm tape-and-reel packaging details. Ensure compatibility with the 48-lead LQFP footprint and check for any recent revision history updates that may affect pin definitions or electrical characteristics.

Selection Notes

Select this component for applications requiring integrated DSP-based audio enhancement alongside DAC conversion. It is suitable for systems needing independent subwoofer management and high dynamic range. Verify that the host processor can support the required SPI control interface and serial data formats (I2S/DSP) before integration.

Part Context

The AD1953 belongs to Analog Devices' line of SigmaDSP-enabled audio processors. It combines multibit Sigma-Delta DAC technology with advanced signal processing algorithms. The part is designed to replace discrete DSP and DAC solutions in high-fidelity audio chains, offering a compact alternative for professional and consumer audio equipment.

Replacement Considerations

Publicly confirmed direct substitute part numbers are not available in the provided source material. Evaluate alternatives based on channel count, resolution, and package compatibility if substitution is required.

FAQ

What is the maximum sample rate supported by the AD1953?

The AD1953 accepts input sample rates up to 48 kHz.

How many biquad filter sections are available per channel?

The device provides 7 biquad filter sections per channel for equalization purposes.

What is the signal-to-noise ratio of the device?

The signal-to-noise ratio is 112 dB (A-weighted stereo) at a 48 kHz sample rate.