MAX8738EUA+

Video Processing Overview

The MAX8738EUA+ is an EEPROM-programmable TFT VCOM calibrator with an I2C interface. It replaces mechanical potentiometers in thin-film transistor liquid-crystal displays by sinking a programmable current to set the VCOM voltage level. The device features a 7-bit digital-to-analog converter (DAC) that controls the sink current, which is ratiometric relative to AVDD and guaranteed monotonic. An internal EEPROM stores the desired VCOM setting for power-up recall. It operates with a 4.5V to 20V analog supply voltage range and includes a 60µA maximum AVDD supply current.

Video Processing Feature Summary

• EEPROM storage retains VCOM settings across power cycles
• I2C interface allows adjustment without additional panel connector pins
• Internal 7-bit DAC provides monotonic sink current control
• Solid-state alternative to labor-intensive mechanical potentiometers

Video Processing Applications

• TFT LCD panels
• Notebook computers
• Display products
• LCD TVs

Video Processing Procurement Notes

Verify the component is the lead-free version indicated by the '+' suffix. Confirm the package type matches the 8-pin µMAX specification. Ensure the operating temperature range meets the -40°C to +85°C requirement. Check for any specific ordering suffixes that might alter electrical characteristics or packaging details.

Video Processing Selection Notes

Select this component when replacing mechanical potentiometers in TFT LCD designs to reduce labor costs and increase reliability. It is suitable for applications requiring automated VCOM calibration via an existing I2C bus. Consider the external resistor requirements for setting the full-scale sink current and the HV supply voltage needed for EEPROM programming.

Video Processing Part Context

The MAX8738 series simplifies the VCOM adjustment process for TFT LCD manufacturers. It integrates a DAC and EEPROM to store calibration data, eliminating the need for manual tuning. The device connects to an external resistive voltage divider to adjust the VCOM level, offering a flexible solution for display manufacturing processes.

Video Processing Replacement Considerations

The MAX1512 is a similar product recommended for applications lacking an existing I2C interface due to its 1-wire interface capability.