MAX97220BETE+

Audio Amplifiers Overview

The MAX97220BETE+ is a differential input DirectDrive line driver and headphone amplifier manufactured by Analog Devices/Maxim Integrated. It operates on a single supply voltage ranging from 2.5V to 5.5V. The device delivers 125mW of output power into a 32Ω load with a 5V supply. It features an externally adjustable gain configuration via external resistors and includes an internal charge pump that creates a negative rail, eliminating the need for large DC-blocking capacitors. The component is housed in a 16-pin TQFN package (3mm x 3mm) and supports an extended operating temperature range from -40°C to +85°C.

Audio Amplifiers Feature Summary

• DirectDrive architecture utilizing an internal charge pump to generate bipolar supplies, removing the requirement for bulky DC-blocking output capacitors.
• Fully differential inputs designed to enhance noise immunity and common-mode rejection capabilities.
• Integrated click-and-pop suppression circuitry to prevent audible transients during power-on and shutdown transitions.
• Configurable gain settings allowing for either fixed or externally adjustable amplification through external resistor networks.

Audio Amplifiers Applications

• Set-Top Boxes
• Blu-ray and DVD Players
• LCD Televisions

Audio Amplifiers Procurement Notes

Verify the specific suffix 'B' indicates a turn-on time of approximately 130ms, distinguishing it from faster variants intended for different application profiles. Confirm the '+E' suffix corresponds to the lead-free/RoHS-compliant TQFN-EP package. Ensure compatibility with the required external feedback and input resistor values for the desired gain setting before finalizing procurement.

Audio Amplifiers Selection Notes

Select this component when designing audio interfaces requiring high fidelity and low distortion in space-constrained environments. The external gain setting provides flexibility for various codec outputs. Consider the 130ms turn-on time suitable for set-top boxes rather than applications demanding immediate audio response. Verify thermal dissipation requirements given the stereo operation and potential power loads.

Audio Amplifiers Part Context

This part belongs to the MAX97220A–MAX97220E family of differential input DirectDrive line drivers and headphone amplifiers. It shares the same footprint as the legacy MAX9722 series but offers improved performance characteristics. The B variant is specifically characterized for set-top box applications with a slower turn-on profile compared to the A, C, and E versions.

Audio Amplifiers Replacement Considerations

The MAX97220_ family is footprint compatible with the MAX9722. When replacing the MAX9722, ensure the 0Ω resistor between the BIAS/SVSS pin and PVSS pin is removed, as the MAX97220 integrates this connection internally.

Audio Amplifiers FAQ

What distinguishes the MAX97220B from other variants in the MAX97220 family?

The MAX97220B features an extended turn-on time of approximately 130ms, making it suitable for set-top box applications, whereas variants like the MAX97220A have a faster turn-on time of 5.5ms intended for headphone applications.

How does the DirectDrive feature benefit the design?

DirectDrive uses an internal charge pump to create a negative supply rail, biasing the output about ground. This eliminates the need for large DC-blocking capacitors, saving board space and reducing system cost.