SI2705-A10-GM

Overview

The Si2705-A10-GM is a stereo Class D audio amplifier integrating digital signal processing and EMI mitigation. It delivers 5 W per channel into 3 Ω loads at 6.6 V, or 3 W into 8 Ω loads with 88% efficiency. The device operates on dual supplies: 4.0–6.6 V for the power stage and 2.7–3.6 V for logic. Key specifications include 95 dB dynamic range, less than 0.1% THD, and over 50 dB PSRR. It features I2S interfaces, automatic audio rate detection from 32 to 192 kHz, and programmable tone controls.

Feature Summary

• Integrates patent-pending EMI mitigation technology including wideband PWM carrier spreading and slew rate control to suppress radiated noise.
• Includes AM radio band noise-free notch filtering to ensure co-existence with AM/FM tuners.
• Features integrated digital audio processing with parametric equalization, dynamic range compression, and tone generation.
• Supports master/slave I2S connections with automatic sample rate detection and asynchronous sample rate conversion.

Applications

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

Procurement Notes

Verify the specific suffix 'A10' against current Silicon Labs documentation to confirm package type and revision status. Confirm RoHS compliance and lead-free status as stated in the datasheet. Check for any superseded part numbers within the Si270x family before finalizing procurement.

Selection Notes

Select this component for designs requiring high-efficiency stereo amplification with strict EMI constraints. Ensure the system supports dual voltage rails (VPP and VDD). Verify that the required output power matches the load impedance capabilities defined in the electrical specifications.

Part Context

This part belongs to the Si2704/05/06/07 series of EMI mitigating Class D amplifiers. The Si2705 variant specifically provides stereo output configuration. It is designed for low-cost, power-efficient consumer audio applications where radio co-existence is critical.

Replacement Considerations

Consult official Silicon Labs documentation for confirmed substitute part numbers within the Si270x family. Do not assume functional equivalence with other manufacturers without verifying pinouts and electrical parameters.

FAQ

How does the Si2705 mitigate EMI?

It utilizes wideband PWM carrier spreading, spectral shifting, and output pulse edge slew rate control to manage switching noise and reduce radiated emissions.

What is the maximum operating temperature?

The recommended operating ambient temperature range extends up to +85 °C.