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.