ADAU1781BCPZ

Overview

The ADAU1781BCPZ is a low-power, 24-bit stereo audio codec manufactured by Analog Devices Inc. It integrates a programmable SigmaDSP core for enhanced audio processing and includes a speaker amplifier capable of delivering 400 mW into an 8 Ω load. The device supports sampling rates from 8 kHz to 96 kHz with analog and digital I/O voltages ranging from 1.8 V to 3.3 V. It features two ADCs and two DACs, supporting serial interfaces including I2C, SPI, I2S, left-justified, right-justified, and TDM modes. The component is housed in a 32-lead, 5 mm × 5 mm LFCSP package.

Feature Summary

• Integrates a programmable SigmaDSP core providing wind noise detection, filtering, dynamics processing, equalization, and volume control.
• Includes a dedicated speaker driver outputting up to 400 mW into an 8 Ω load alongside stereo line outputs.
• Supports flexible clock generation via a programmable PLL for master clocks between 11 MHz and 20 MHz.
• Features software-controllable clickless mute and hardware pin standby mode for power management.

Applications

• Digital still cameras
• Digital video cameras

Procurement Notes

Verify the obsolete status of this component before design implementation. Confirm that the specific ordering suffix matches the required package variant. Ensure compatibility with existing system voltage levels and interface protocols. Check for available evaluation boards or updated replacement models from the manufacturer.

Selection Notes

Select this component for applications requiring integrated DSP capabilities within a compact form factor. Verify that the 32-lead LFCSP package fits the PCB layout constraints. Ensure the host processor supports the required serial control and audio data interfaces. Consider the power consumption profiles across different operating modes for battery-powered designs.

Part Context

This part belongs to the ADAU1781 series of low-power stereo codecs. It is designed for portable consumer electronics where space and power efficiency are critical. The integration of the SigmaDSP core distinguishes it from standard codecs by allowing on-chip signal processing without external processors.

Replacement Considerations

The datasheet marks this component as OBSOLETE. Engineers should consult the manufacturer's current product portfolio for equivalent low-power stereo codecs with integrated DSP cores. Verify pinout and register compatibility if substituting with newer family members.