MAX9702ETI+

Audio Amplifiers Overview

The MAX9702ETI+ is a stereo audio amplifier integrating a Class D speaker stage and a DirectDrive Class AB headphone stage. It operates on a 2.5V to 5.5V supply within an extended -40°C to +85°C range. The device delivers up to 1.8W into a 4Ω load or 1.1W into an 8Ω load at 5V. Headphone output reaches 48mW into 32Ω at 3.3V. Key electrical metrics include 94% efficiency, 0.07% THD+N for speakers, and >97dB SNR. It utilizes spread-spectrum modulation to eliminate external output filters.

Audio Amplifiers Feature Summary

• Integrates a filterless Class D speaker amplifier with a high-linearity DirectDrive Class AB headphone amplifier.
• Features spread-spectrum modulation to reduce EMI emissions without requiring traditional output filters.
• Includes comprehensive protection mechanisms such as short-circuit and thermal-overload safeguards.
• Offers fully programmable gain, mute, mono/stereo, and mix functions via an I2C interface.

Audio Amplifiers Applications

• Cellular Phones
• Notebook PCs
• PDAs
• Handheld Gaming Consoles

Audio Amplifiers Procurement Notes

Verify the component status carefully, as this specific part number is marked as obsolete in distributor databases. Confirm availability of replacement alternatives from Analog Devices or Maxim Integrated before finalizing design-in decisions. Ensure the ordering suffix matches the required lead-free package specifications.

Audio Amplifiers Selection Notes

Select this component when a single-chip solution is required for both speaker and headphone amplification in space-constrained portable devices. The integrated DirectDrive architecture removes the need for large DC-blocking capacitors, reducing board space and cost. Verify that the I2C control requirements align with the system's microcontroller capabilities.

Audio Amplifiers Part Context

This device belongs to the DirectDrive family of audio amplifiers designed for mobile applications. It combines the efficiency of Class D technology with the low distortion of Class AB performance. The 28-pin TQFN-EP package provides a compact footprint suitable for modern handheld electronics while offering thermal management through an exposed paddle.

Audio Amplifiers Replacement Considerations

Check for updated revisions or successor models within the MAX9702 series, such as the MAX9702BETI+, which may offer minor functional variations or improved availability due to the original part's obsolete status.