WM8770SIFT/V

Overview

The WM8770SIFT/V is a high-performance, multi-channel audio codec designed for surround sound processing in home hi-fi, automotive, and AV equipment. It features four independent stereo 24-bit sigma-delta DACs and a stereo 24-bit sigma-delta ADC with an eight-channel input selector. The device supports digital audio input word lengths from 16 to 32 bits and sampling rates up to 192kHz for DACs, while the ADC supports rates up to 96kHz. Audio performance includes a typical SNR of 106dB for the DAC and 102dB for the ADC at 48kHz. It operates on a 2.7V to 5.5V analogue supply and a 2.7V to 3.6V digital supply, housed in a 64-lead TQFP package.

Feature Summary

• Four independent stereo DAC outputs with individual analogue and digital volume controls
• Eight stereo ADC inputs with programmable gain adjustment ranging from +19dB to -12dB
• Support for I2S, left justified, and right justified digital audio interface formats
• Integrated analogue bypass path allowing direct signal routing through volume controls

Applications

• Surround Sound AV Processors
• Hi-Fi Systems
• Automotive Audio

Procurement Notes

Verify the specific suffix 'SIFT' corresponds to the -40°C to +85°C temperature range and MSL3 moisture sensitivity level as documented in the ordering information. Confirm that the component is supplied in a lead-free 64-lead TQFP package. Ensure compatibility with the required peak soldering temperature of 260°C during assembly processes.

Selection Notes

Select this component when designing systems requiring eight discrete analogue inputs and four stereo DAC outputs within a single integrated circuit. It is suitable for applications needing flexible clocking modes (master or slave) and independent channel control. Verify that the system power supplies align with the specified 2.7V to 5.5V analogue and 2.7V to 3.6V digital ranges.

Part Context

The WM8770 is manufactured by Wolfson Microelectronics plc, which is now part of Cirrus Logic. This specific variant, WM8770SIFT/V, denotes the industrial temperature grade and surface-mount packaging. It belongs to a family of multi-channel codecs designed for high-fidelity audio processing, sharing architectural similarities with models like the WM8771 but differing in channel configuration and feature sets.

Replacement Considerations

The WM8770SIFT/RV is a tape-and-reel version of the same device with identical electrical characteristics and pinout. Other variants such as WM8770FT or WM8770FV may be considered if different packaging or reel quantities are required, provided they meet the same functional specifications.