AD74111YRU

Overview

The AD74111YRU is a low-cost, low-power mono audio codec manufactured by Analog Devices Inc. It features a multibit sigma-delta ADC and DAC channel with 24-bit resolution. The device operates on a 2.5 V supply with a 3.3 V tolerant digital interface. It supports sample rates from 8 kHz to 48 kHz and word lengths of 16, 20, or 24 bits. Key performance metrics include an ADC dynamic range of 85 dB and a DAC dynamic range of 93 dB at 48 kHz. The component is housed in a 16-lead TSSOP package and is specified for an operating temperature range of –40°C to +105°C.

Feature Summary

• Multibit sigma-delta modulators with perfect differential linearity restoration to reduce idle tones and noise floor.
• Data directed scrambling DAC architecture that minimizes sensitivity to jitter within the 20 Hz to 20 kHz bandwidth.
• Integrated software-controllable clickless mute and programmable volume control for the DAC channel.
• Flexible serial port supporting master and slave modes with configurable word lengths and frame synchronization.

Applications

• Digital video camcorders (DVC)
• Portable audio devices such as personal media players
• Telematic systems
• Voice processing and speech recognition applications

Procurement Notes

Verify the specific suffix YRU against the manufacturer's ordering guide to confirm the automotive temperature grade and TSSOP-16 package configuration. Ensure compatibility with the required voltage levels for AVDD, DVDD1, and DVDD2 supplies during integration. Cross-reference the datasheet revision to confirm pinout and electrical specifications match the design requirements before finalizing procurement.

Selection Notes

Select this component for mono audio front-end applications requiring high dynamic range and low power consumption. The integrated on-chip reference simplifies design by reducing external component count. Consider the master clock prescaler flexibility when interfacing with DSPs that have fixed clock outputs. Verify that the serial interface timing constraints align with the host controller's capabilities for reliable data transfer.

Part Context

The AD74111 serves as a front-end processor for general-purpose audio and voice applications. It integrates both analog-to-digital and digital-to-analog conversion channels into a single compact package. The device is designed to replace discrete codec solutions, offering reduced board space and simplified system architecture for portable and telematic electronics.

Replacement Considerations

The AD74111YRUZ is a verified equivalent part number offering identical functionality and specifications. Both variants share the same pinout, electrical characteristics, and application notes. Designers may substitute one for the other without modifying the schematic or layout, provided the package type remains consistent.