WM1811AECS/R

Overview

The WM1811AECS/R is a multi-channel audio hub CODEC designed for smartphones and portable multimedia devices. It integrates stereo Class D speaker drivers and Class W headphone drivers to minimize power consumption. The device features 24-bit resolution with a conversion rate of 96 kHz, supporting asynchronous sample rate conversion and digital mixing. It operates on supply voltages of 1.05 V, 1.8 V, 3 V, and 5 V within an operating temperature range of -40°C to +85°C. The component utilizes a WCSP-80 package and includes interfaces for up to two digital microphones.

Feature Summary

• Integrated stereo Class D speaker driver and capless Class W headphone driver for efficient audio playback
• Smart microphone interface providing power regulation, clocking, and decimation filters for digital microphones
• Asynchronous stereo duplex sample rate conversion combined with powerful analogue and digital mixing capabilities
• Active noise reduction circuits including DC offset correction and ground loop noise cancellation

Applications

• Smartphones and music phones
• Portable navigation systems
• Tablets and eBooks
• Portable media players

Procurement Notes

Verify the specific manufacturer designation, as the component was originally produced by Wolfson Microelectronics plc before its acquisition by Cirrus Logic. Confirm that the ordering suffix matches the required packaging format and ensure compatibility with the intended system voltage rails. Cross-reference the revision level against the latest production data to confirm feature parity.

Selection Notes

Select this component when a highly integrated solution is required to reduce external component count in portable designs. The inclusion of both speaker and headphone drivers eliminates the need for separate amplifier ICs. Ensure the design supports the necessary dual voltage supplies and accommodates the specific pin configuration of the 80-ball W-CSP package.

Part Context

This part belongs to the Wolfson Microelectronics (now Cirrus Logic) WM18xx series of ultra-low power audio hubs. It is specifically engineered for mobile applications requiring high-fidelity audio performance with minimal power draw. The device represents a consolidation of codec, amplifier, and digital signal processing functions into a single compact package.

Replacement Considerations

WM1831ECS/R

FAQ

How does the WM1811A handle microphone input?

It provides a smart digital microphone interface capable of powering, clocking, and receiving data from up to two digital microphones, alongside a high-performance analogue microphone interface.

What is the purpose of the ReTune Mobile feature?

ReTune Mobile is a 5-band, 4-channel parametric equalizer used for speaker compensation in the digital playback paths.

Does the device support multiple processor architectures?

Yes, it includes digital audio interfaces for multi-processor architecture, featuring asynchronous stereo duplex sample rate conversion and digital loopback functions.