MAX9723CETE+T

Audio Amplifiers Overview

The MAX9723CETE+T is a stereo DirectDrive headphone amplifier from Analog Devices/Maxim Integrated. It operates on a single 1.8V to 3.6V supply and delivers 62mW into a 16Ω load with 0.006% THD+N. The device features a +6dB maximum gain, integrated 32-level volume control, and software-enabled BassMax. It utilizes an I2C/SMBus interface for configuration and includes industry-leading click-and-pop suppression. The component is housed in a 16-pin Thin QFN package and functions within a -40°C to +85°C temperature range.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates bulky DC-blocking capacitors by generating an internal negative supply for ground-referenced outputs.
• Integrated digital volume control provides 32 discrete levels via an I2C-compatible serial interface.
• Software-controlled BassMax circuitry boosts low-frequency response to compensate for headphone limitations.
• Comprehensive protection mechanisms include short-circuit and thermal-overload safeguards alongside ±8kV HBM ESD protection.

Audio Amplifiers Applications

• PDA Audio
• Portable CD Players
• Mini Disc Players
• MP3-Enabled Cellular Phones
• MP3 Players

Audio Amplifiers Procurement Notes

Verify the specific suffix 'C' indicates a +6dB maximum gain setting distinct from other variants. Confirm the 'ETE' designation corresponds to the 16-pin Thin QFN package type. Ensure the '+T' suffix aligns with the required reel or cut tape packaging format for your assembly process. Cross-reference the manufacturer's current production status to confirm availability.

Audio Amplifiers Selection Notes

Select this component when space constraints prohibit large output coupling capacitors. Choose the MAX9723C variant specifically if a higher maximum gain of +6dB is required compared to the 0dB options. Ensure the system design accommodates the I2C bus requirements and external components for the BassMax filter network.

Audio Amplifiers Part Context

This part belongs to the MAX9723 family of stereo DirectDrive headphone amplifiers. The family differentiates parts primarily through their maximum programmable gain settings and corresponding I2C slave addresses. The MAX9723C represents the high-gain option within this series, designed for applications requiring increased signal drive capability.

Audio Amplifiers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing board layouts and firmware if considering alternative gain variants such as the MAX9723A or MAX9723B.

Audio Amplifiers FAQ

How does the DirectDrive architecture benefit the design?

It creates a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, which saves board space and improves low-frequency response.

What is the function of the BassMax feature?

BassMax is a software-enabled bass boost that compensates for the poor low-frequency reproduction of inexpensive headphones by increasing amplifier gain at low frequencies.

How is the shutdown mode controlled?

Shutdown can be controlled via a hardware interface by driving the SHDN pin low, or via the software interface by resetting bit seven in the command register.