MAX9850ETI+T

Audio Amplifiers Overview

The MAX9850ETI+T is a low-power stereo audio DAC with an integrated DirectDrive headphone amplifier. It operates on a single supply from 1.8V to 3.6V and supports sampling rates from 8kHz to 48kHz. The device features a flexible clocking circuit accepting master clocks up to 40MHz, eliminating the need for external PLLs. It includes stereo line inputs/outputs, I2C-compatible control, and clickless/popless operation. Packaged in a 28-pin thin QFN (5mm x 5mm), it provides high performance for portable devices.

Audio Amplifiers Feature Summary

• DirectDrive technology produces ground-biased analog outputs from a single supply, removing the need for large DC-blocking capacitors.
• Flexible clocking accepts any system clock up to 40MHz, supporting both integer and noninteger oversampling modes without external oscillators.
• Integrated headphone sense input automatically manages power states based on jack connection status.
• Stereo line inputs allow mixing of analog audio signals directly with the digital audio stream.

Audio Amplifiers Applications

• Cell phones and smart phones
• MP3 and portable multimedia players
• Portable DVD players

Audio Amplifiers Procurement Notes

Verify the specific suffix 'TI' against the manufacturer's official datasheet to confirm package dimensions and thermal pad specifications. Ensure the component meets RoHS compliance requirements for your target market. Confirm that the operating temperature range of -40°C to +85°C aligns with your environmental design constraints before finalizing procurement.

Audio Amplifiers Selection Notes

Select this component when board space is limited due to its capacitor-free DirectDrive architecture. It is suitable for designs requiring flexible master clock integration up to 40MHz. Use this part if the application demands simultaneous analog line mixing and digital playback within a compact 28-pin QFN footprint.

Audio Amplifiers Part Context

This component belongs to the MAX9850 series of audio DACs manufactured by Analog Devices / Maxim Integrated. It is designed specifically for portable electronics where power efficiency and minimal external component count are critical. The DirectDrive feature distinguishes it from traditional amplifiers by utilizing an internal charge pump for output biasing.

Audio Amplifiers Replacement Considerations

Public confirmed substitute part numbers: None identified in source material.

Audio Amplifiers FAQ

How does the MAX9850 eliminate the need for output coupling capacitors?

It uses Maxim’s DirectDrive technology, which employs an internal charge pump to create a negative voltage supply. This allows the analog audio outputs to be biased at ground potential, enabling direct driving of headphones without DC-blocking capacitors.

What digital audio interfaces does the MAX9850 support?

The device supports a flexible 3-wire interface compatible with left-justified, right-justified, and I2S audio data formats. Configuration and volume control are managed via a 2-wire I2C-compatible interface.