AD1974YSTZ

Overview

The AD1974YSTZ is a high-performance, single-chip analog-to-digital converter (ADC) from Analog Devices. It integrates four differential ADC channels utilizing a multibit sigma-delta architecture. The device supports 24-bit resolution with sample rates ranging from 8 kHz to 192 kHz. It operates on a single 3.3 V supply and features an internal phase-locked loop (PLL) for master clock generation. Key electrical specifications include a dynamic range of 107 dB, -94 dB THD+N, and tolerance for 5 V logic inputs. The component is housed in a 48-lead LQFP package.

Feature Summary

• Four-channel differential ADC input with 24-bit resolution
• Internal PLL generates master clock from LRCLK or external crystal
• Low EMI design optimized for audio applications
• Software-controllable clickless mute and power-down modes

Applications

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

Procurement Notes

Verify the specific suffix YSTZ against the manufacturer's current ordering guide to confirm package type and automotive qualification status. Ensure that the 48-lead LQFP footprint matches the target PCB layout dimensions. Confirm that the 3.3 V supply requirements align with the system design before procurement.

Selection Notes

Select this component when four differential inputs are required for high-fidelity audio conversion. The internal PLL simplifies clocking by deriving the master clock from the bit clock or an external crystal. Verify that the system can accommodate the 3.3 V supply voltage and that the SPI interface is available for configuration control.

Part Context

The AD1974 is part of Analog Devices' audio data converter family designed for low electromagnetic interference. It utilizes a patented multibit sigma-delta architecture to achieve high dynamic range. The device is qualified for automotive applications, making it suitable for harsh environments where reliability and low noise are critical.

Replacement Considerations

Check the official Analog Devices ordering guide for direct pin-compatible replacements within the same series. Ensure any substitute maintains the 48-lead LQFP package and 3.3 V operating voltage. Verify that the replacement supports the required 192 kHz sample rate and differential input configuration.