MAX9705DEBC+T

Audio Amplifiers Overview

The MAX9705DEBC+T is a mono, Class D audio power amplifier from Analog Devices/Maxim Integrated. It delivers 2.3W into a 4Ω load with efficiencies exceeding 85%. The device operates on a supply voltage range of 2.5V to 5.5V and features ultra-low EMI through Active Emissions Limiting (AEL) and Spread-Spectrum Modulation (SSM). It utilizes Zero Dead Time (ZDT) technology for high efficiency and low THD+N. The component is housed in a 12-bump UCSP package measuring 1.5mm x 2mm x 0.6mm and is specified over an extended temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• Active Emissions Limiting (AEL) circuitry reduces electromagnetic interference by controlling output FET gate transitions under all transient conditions.
• Spread-spectrum modulation flattens wideband spectral components to improve EMI performance without degrading audio quality.
• Zero Dead Time (ZDT) H-bridge maintains state-of-the-art efficiency and distortion performance by allowing simultaneous switching without cross-conduction.
• Filterless operation eliminates the need for external LC filters by relying on speaker coil inductance and natural filtering.

Audio Amplifiers Applications

• Cellular phones
• Portable audio devices
• MP3 players

Audio Amplifiers Procurement Notes

Verify the specific gain variant suffix (e.g., A, B, C, or D) required for the application, as internal gain settings differ between sub-models. Confirm that the 12-bump UCSP package dimensions align with the PCB footprint. Ensure the selected gain version supports the desired input configuration, as single-ended setups may require higher gain variants to achieve maximum output power.

Audio Amplifiers Selection Notes

Select the appropriate gain variant based on the source signal amplitude; lower gain versions suit differential inputs while higher gains are beneficial for single-ended configurations. Consider the SYNC pin functionality if system-wide clock synchronization or spread-spectrum mode selection is required. Evaluate thermal management requirements, as the small UCSP package relies on the exposed pad for heat dissipation.

Audio Amplifiers Part Context

This component belongs to the MAX9705 family of ultra-low EMI, filterless Class D amplifiers. It is designed to provide Class AB audio performance with Class D efficiency. The device integrates comprehensive protection features, including short-circuit and thermal-overload protection, ensuring reliability in portable electronic applications where space and battery life are critical constraints.

Audio Amplifiers Replacement Considerations

The datasheet indicates pin-for-pin compatibility with the MAX9700 and MAX9712. Verify electrical specifications and package availability when substituting these parts.