AD1953YSTZ

Overview

The AD1953YSTZ is a 26-bit, single-chip, 3-channel digital audio playback system featuring built-in SigmaDSP functionality. It integrates three multibit Σ-Δ DACs with analog output drive circuitry, designed for speaker equalization, dual-band compression/limiting, delay compensation, and image enhancement. The device accepts sample rates up to 48 kHz via flexible serial data ports (I²S, DSP mode, etc.). Key electrical parameters include a 5 V supply voltage, 24-bit resolution, and a maximum clock frequency of 12.288 MHz. It operates within a temperature range of -40°C to +105°C and is housed in a 48-lead LQFP package.

Feature Summary

• Integrated 26-bit DSP core with 7 biquad filter sections per channel for precise speaker equalization.
• Dual dynamic processor with arbitrary input/output curves and adjustable time constants for compression/limiting.
• Variable delay capability (0 ms to 6 ms per channel) for speaker alignment and stereo spreading algorithms.
• On-chip clickless volume control and mute functions with hardware/software controllability.

Applications

• 2.0/2.1 Channel Audio Systems
• Multichannel Automotive Sound Systems
• Home Theater Systems (AC-3 Postprocessor)
• In-Seat Sound Systems

Procurement Notes

Verify the specific ordering suffix YSTZ corresponds to the 48-lead LQFP plastic package variant. Confirm RoHS compliance status through official Analog Devices documentation prior to procurement. Ensure supply chain sources provide valid traceability for this component.

Selection Notes

Select this component for applications requiring integrated DSP processing alongside DAC conversion in a 3-channel configuration. Ensure the design supports a 5 V single supply and accommodates the 48-lead LQFP footprint. Verify that the host system can interface with the SPI port for parameter RAM updates and program memory downloads.

Part Context

The AD1953YSTZ belongs to the Analog Devices SigmaDSP family of audio processors. It combines high-performance digital signal processing with multibit Σ-Δ modulation technology. This integration allows for complex audio algorithms to be executed on-chip, reducing the need for external DSP components while maintaining high audio fidelity.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult Analog Devices for current equivalent recommendations if the AD1953YSTZ is unavailable.

FAQ

What is the maximum sample rate supported by the AD1953?

The AD1953 accepts sample rates up to 48 kHz.

How many biquad filter sections are available per channel?

There are 7 biquad filter sections available per channel for equalization purposes.

What is the function of the ZEROFLAG pin?

The ZEROFLAG pin goes HIGH if both serial inputs have been inactive (zero data) for 1024 LRCLK cycles, indicating digital silence.