Product details


Display type Automotive, LCD bipolar, LCD unipolar IC integration Gamma buffer, VCOM Vin (Min) (V) 7 Vin (Max) (V) 18 Source driver voltage (Min) (V) 7 Source driver voltage (Max) (V) 18 Level shifter/scan driver (ch) 0 Special function Gamma buffer, I2C interface, VCOM or op amp Rating Automotive open-in-new Find other LCD & OLED display power & drivers

Package | Pins | Size

HTSSOP (DCP) 38 43 mm² 9.7 x 4.4 open-in-new Find other LCD & OLED display power & drivers


  • 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

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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.

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Technical documentation

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Type Title Date
* Data sheet BUF20800-Q1 18-Channel Programmable Gamma Voltage Generator With Two Programmable VCOM Channels datasheet (Rev. C) Aug. 08, 2018
Application note Driving Capacitive Loads with Gamma Buffers Nov. 20, 2012

Design & development

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Design tools & simulation

SBOC285B.TSC (176 KB) - TINA-TI Reference Design
SBOC286A.ZIP (37 KB) - Spice Model
SBOM313A.ZIP (6 KB) - TINA-TI Spice Model
SBOM409.ZIP (39 KB) - IBIS Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
Noise Calculator, Generator and Examples
OPAMP-NOISECALC This folder contains three tools to help in understandning and managing noise in cicuits. The included tools are:
  • A noise generator tool - This is a Lab View 4-Run Time executable that generates Gaussian white noise, uniform white noise, 1/f noise, short noise, and 60Hz line noise. Temporal data (...)

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