SI2706-A10-GM

Overview

The Silicon Labs SI2706-A10-GM is an EMI mitigating Class D digital audio amplifier from the Si270x series. It integrates a stereo power stage, PWM DAC, and digital signal processing (DSP). The device supports dual supply voltages of 2.7–3.6 V for logic and 4.0–6.6 V for the power stage. It delivers up to 5 W per channel into 3 Ω loads or 3 W into 8 Ω loads with 88% efficiency. Key electrical parameters include a 95 dB dynamic range, less than 0.1% THD+N, and over 50 dB PSRR.

Feature Summary

• Integrates patent-pending EMI mitigation technology including wideband PWM carrier spreading and slew rate control to suppress radiated noise.
• Features AM radio band noise-free notch filtering to ensure co-existence with AM/FM tuners.
• Includes comprehensive digital audio processing such as a programmable 7-band parametric equalizer, dynamic range compressor, and tone controls.
• Supports master/slave I2S interfaces with automatic digital audio rate detection for standard rates from 32 kHz to 192 kHz.

Applications

• PMP/MP3 docking stations
• Portable consumer audio electronics
• Active/wireless speakers
• TV sound bars

Procurement Notes

Verify the specific suffix 'GM' against the manufacturer's current ordering guide to confirm package type and tape/reel specifications. Confirm RoHS compliance status and lead times directly with Silicon Labs or authorized distributors prior to finalizing procurement plans.

Selection Notes

Select this component when high-efficiency amplification requires integrated digital signal processing and strict EMI management. The Si2706 variant specifically includes advanced DSP features like parametric EQ and crossover filters. Ensure system design accommodates the dual voltage requirements and I2S interface constraints.

Part Context

This part belongs to the Si2704/05/06/07-A10 family of EMI mitigating Class D amplifiers. The Si2706 model distinguishes itself by offering enhanced digital audio processing capabilities compared to the base Si2704, making it suitable for complex audio systems requiring internal signal conditioning.

Replacement Considerations

Direct replacements within the same family include the Si2704, Si2705, and Si2707 models. Verify functional differences, particularly regarding the presence of DSP features like parametric EQ in the Si2706 versus other variants, before substituting.

FAQ

How does the Si2706 manage EMI without external output filters?

It utilizes Spread Mode PWM to spread common mode switching energy, suppressing peak emissions by more than 20 dB, which allows for filter-less applications.

What digital audio processing features are included in the Si2706?

The Si2706 includes a programmable 7-band parametric equalizer, dynamic range compression, tone control, and a crossover filter.