MAX9723DETE+TG069

Audio Amplifiers Overview

The MAX9723DETE+TG069 is a stereo DirectDrive headphone amplifier from Analog Devices Inc./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 integrated 32-level volume control, software-enabled BassMax, and I2C/SMBus interface. It includes industry-leading click-and-pop suppression, ±8kV HBM ESD protection, and short-circuit/thermal-overload protection. Quiescent current is 3.7mA at 1.8V, with a low-power shutdown mode consuming 5μA. It is specified over an extended temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates bulky DC-blocking capacitors by producing a ground-referenced output from a single supply.
• Integrated 32-level digital volume control and software-enabled BassMax feature accessible via I2C/SMBus-compatible interface.
• Comprehensive protection mechanisms include short-circuit, thermal-overload, and ±8kV HBM ESD-protected headphone outputs.
• Industry-leading click-and-pop suppression ensures minimal audible transients during power-up and shutdown.

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 'TG069' against official manufacturer documentation, as standard datasheets list 'ETE+' for the TQFN package. Confirm availability status, as some variants may be obsolete or discontinued. Ensure the selected part matches the required I2C slave address (MAX9723A/B vs C/D) and gain configuration for your design.

Audio Amplifiers Selection Notes

Select this component for space-constrained portable audio designs requiring high performance without external coupling capacitors. Choose between MAX9723A/B (0dB max gain) or C/D (+6dB max gain) based on input signal levels. Utilize the I2C interface for remote volume adjustment and bass boost tuning. Consider the 16-pin thin QFN package for its thermally efficient and compact footprint.

Audio Amplifiers Part Context

The MAX9723 belongs to Maxim's DirectDrive family of stereo headphone amplifiers. It is designed to replace traditional single-supply amplifiers that require large output capacitors. The series offers various gain options and I2C addresses to support multiple devices on a single bus. It is widely used in consumer electronics where battery life and board space are critical constraints.

Audio Amplifiers Replacement Considerations

Check for direct substitutes within the MAX9723 family (e.g., MAX9723AETE+, MAX9723BETE+) differing only in gain or I2C address. Verify pin compatibility if replacing with other DirectDrive amplifiers like the MAX9722 series, noting differences in supply voltage and output power capabilities.

Audio Amplifiers FAQ

How does the DirectDrive architecture benefit the design?

It creates a ground-referenced output using an internal charge pump, eliminating the need for large DC-blocking capacitors. This saves board space, reduces cost, and improves low-frequency response.

What is the purpose of the BassMax feature?

BassMax boosts the bass response of the amplifier to compensate for the poor low-frequency reproduction typical of small headphones, improving audio quality without causing clipping due to increased headroom.

How is the shutdown mode controlled?

Shutdown can be controlled via hardware by driving the SHDN pin low, or via software by resetting bit seven in the command register through the I2C interface. Both methods reduce quiescent current to approximately 5μA.