1 Features

1• Qualified for Automotive Applications

• AEC-Q100 Qualified With the Following Results:

– Device Temperature Grade 1

– Device HBM ESD Classification Level 2

– Device CDM ESD Classification Level C4

• Low Supply Current: 900 μA/ch

• Analog Supply Voltage: 7 V to 18 V

• Digital Supply Voltage: 2 V to 5.5 V

• 18-Channel Gamma Correction

• 2-Channel Programmable VCOM: 50 mA IOUT

• 10-Bit Resolution

• Rail-to-Rail Output

• I2C Interface

– 3.4 MHz High-Speed Mode

• Demo Board and Software Available

2 Applications

• Replaces Resistor-Based Gamma Solutions

• TFT-LCD Reference Drivers

• Dynamic Gamma Control

3 Description

The BUF20800-Q1 is a programmable voltage

reference generator designed for gamma correction

in TFT-LCD panels. It provides 18 programmable

outputs for gamma correction and two channels for

VCOM adjustment, each with 10-bit resolution.

All channels are programmable using an I2C interface

that supports high-speed data transfers up to 3.4

MHz.

This programmability replaces the traditional, time

consuming process of changing resistor values to

optimize the various gamma voltages and allows

designers to determine the correct gamma voltages

for a panel very quickly. Required changes are easily

implemented without hardware changes.

The BUF20800-Q1 uses TI’s latest, small-geometry

analog CMOS process, which makes it a very

competitive choice for full production, not just

evaluation.

For lower channel count, please contact your local

sales or marketing representative.

The BUF20800-Q1 is available in an HTSSOP-38

package withPowerPAD™. It is specified from −40°C

to +105°C.