BUF12800AIPWPR ,Reference Voltage Generator for LCD Gamma CorrectionMAXIMUM RATINGSInstruments recommends that all integrated circuits beSupply Voltage, V . . . . . . ..
BUF12840AIRGER ,12-CH Gamma Voltage Generator with Dual Memory Banks and EEPROM Access 24-VQFN -40 to 95ELECTRICAL CHARACTERISTICSBoldface limits apply over the specified temperature range, T =–40°C to + ..
BUF16821AIPWPR ,16-CH Gamma-Voltage Generator and Vcom Calibrator with Integrated Two-Bank Memory 28-HTSSOP -40 to 85ELECTRICAL CHARACTERISTICSBoldface limits apply over the specified temperature range, T =–40°C to + ..
BUF16821BIPWPR ,16-CH Gamma-Voltage Generator and Vcom Calibrator with Integrated Two-Bank Memory 28-HTSSOP -40 to 85FEATURES DESCRIPTIONThe BUF16821 offers 16 programmable gamma234• 10-BIT RESOLUTIONchannels and two ..
BUF20800 ,18-Channel Gamma Voltage Generator with Two Programmable VCOM ChannelsMAXIMUM RATINGSSupply Voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
BUF20800AIDCPR ,18-CH Gamma Voltage Generator with Two Programmable VCOM Channels 38-HTSSOP -40 to 95FEATURES APPLICATIONS 18-CHANNEL GAMMA CORRECTION REPLACES RESISTOR-BASED GAMMA 2-CHANNEL PROGRA ..
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BUF12800AIPWP-BUF12800AIPWPR
Reference Voltage Generator for LCD Gamma Correction
FEATURES 12-CHANNEL GAMMA CORRECTION 10-BIT RESOLUTION DOUBLE-BUFFERED DAC REGISTERS INTEGRATED REFERENCE BUFFERS RAIL-TO-RAIL OUTPUT LOW SUPPLY CURRENT: 900µA/ch SUPPLY VOLTAGE: 7V to 18V DIGITAL SUPPLY: 2.3V to 5.5V INDUSTRY-STANDARD TWO-WIRE INTERFACE
− High-Speed Mode: 3.4MHz HIGH ESD RATING:
− 4kV HBM, 1kV CDM, 200V MM DEMO BOARD AND SOFTWARE AVAILABLEOutA
REFH
VSD
REFL
SCL
SDA
OutB
OutC
OutD
OutE
OutF
OutG
OutH
OutI
OutJ
OutK
OutL
APPLICATIONS TFT-LCD REFERENCE DRIVERS REFERENCE VOLTAGE GENERATORS INDUSTRIAL PROCESS CONTROL
DESCRIPTIONThe BUF12800 is a programmable voltage reference
generator designed for dynamic gamma correction in
TFT-LCD panels. It provides 12 programmable outputs,
each with 10-bit resolution.
TI’s new, small geometry, state-of-the-art, analog CMOS
process allows the use of one digital-to-analog converter
(DAC) per channel while still maintaining a very small chip
size. This topology has the advantage of significantly
increased programming speed over existing program-
mable buffers.
Programming of each output occurs through an industry-
standard, two-wire serial interface. Unlike existing
programmable buffers, the BUF12800 offers a high-
speed, two-wire interface mode that allows clock speeds
up to 3.4MHz. The BUF12800 features a double-buffered
DAC register structure that significantly simplifies imple-
mentation of dynamic gamma control. This further reduces
programming time, especially when many channels have
to be updated simultaneously.
Reference pins set the high and low voltages of the output
range. They are internally buffered, which simplifies
design. They may be connected to external resistors to
divide the output range for finer resolution of outputs.
The BUF12800 is available in a TSSOP-24 PowerPAD
package. It is specified from −40°C to +85°C.
BUF12800 RELATED PRODUCTS
BUF12800SBOS315D − DECEMBER 2004 − REVISED DECEMBER 2007
REFERENCE VOLT AGE GENERATOR
for LCD GAMMA CORRECTION
