WM8962ECS/R

Overview

The WM8962ECS/R is a low-power stereo CODEC designed for portable digital audio applications. It integrates Class D speaker drivers and ground-referenced headphone drivers with an integrated charge pump, eliminating the need for DC-blocking capacitors. The device features 24-bit sigma-delta ADCs and DACs, a programmable audio enhancement DSP, and two PLLs for system clocking. Key electrical parameters include a DAC SNR of 98dB (A-weighted) and ADC SNR of 94dB (A-weighted) at 1.8V. It operates on analogue supplies from 1.7V to 2.0V, digital supplies down to 1.62V, and speaker supplies up to 5.5V. The component is housed in a 49-ball W-CSP package measuring 3.6x3.9mm.

Feature Summary

• Integrated Class D speaker drivers providing 1W per channel into 8-ohm loads or 2W mono into 4-ohm loads.
• Wolfson 'Class-W' ultra-low power headphone driver with ground-referenced output and pop/click suppression mechanisms.
• Programmable audio enhancement DSP featuring Virtual Surround Sound, HD Bass, and ReTune algorithms.
• Flexible input configuration supporting four stereo analogue inputs or eight mono inputs with integrated microphone bias.

Applications

• Portable gaming devices
• Voice recorders
• Mobile multimedia systems
• Stereo digital still camera camcorders

Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm reel quantity and moisture sensitivity level. The ECS/R variant typically corresponds to a 5,000-unit tape and reel packaging format. Confirm that the procurement source provides official documentation matching the Rev 4.3 datasheet specifications to ensure compatibility with the -40°C to +85°C operating temperature range.

Selection Notes

Select this component when designing portable audio systems requiring integrated speaker amplification and high-performance stereo conversion. Ensure the design accommodates the required supply voltage ranges: 1.7V–2.0V for analogue sections, 1.62V–2.0V for digital logic, and up to 5.5V for the speaker supply. Verify that the application benefits from the integrated DSP features such as Virtual Surround Sound and HD Bass to reduce external processing requirements.

Part Context

The WM8962 belongs to Cirrus Logic's portfolio of ultra-low power stereo CODECs intended for mobile and handheld electronics. It succeeds earlier generations by integrating Class D amplification and advanced DSP capabilities directly onto the silicon die. This integration significantly reduces the bill of materials and board space compared to discrete amplifier and codec solutions, making it suitable for compact form factors like smartphones and portable media players.

Replacement Considerations

The WM8962ECSN/R is a confirmed substitute part number within the same family, offering identical functional specifications but packaged in a 3,500-unit tape and reel quantity. Both variants share the same 49-ball CSP footprint and operate within the same temperature range. Designers should verify that their assembly processes accommodate the specific reflow profiles associated with the chosen packaging quantity.

FAQ

How does the WM8962 eliminate the need for DC-blocking capacitors on headphone outputs?

The device utilizes an integrated charge pump that provides a ground-referenced output for the headphone drivers. This architecture, combined with Wolfson 'Class-W' techniques, allows the headphones to be driven directly without series coupling capacitors.

What are the maximum power output capabilities of the integrated Class D speakers?

The Class D speaker drivers can deliver 1W per channel into 8-ohm BTL speakers or 2W mono into a 4-ohm BTL load when powered by a 5V supply.

Which digital audio interfaces are supported by the WM8962?

The WM8962 supports standard sample rates from 8kHz to 96kHz and offers flexible digital audio interface options including I2S, TDM, and various serial modes compatible with standard DSP protocols.