●The BUF16820 is a programmable voltage reference generator designed for gamma correction in TFT-LCD panels. It provides 14 programmable outputs and two VCOM channels, each with 10-bit resolution. It offers on-chip, one-time programmable (OTP) memory that allows the user to store the gamma voltages on-chip. This eliminates the need for an external EEPROM.
●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 voltage changes can also be easily implemented without changing the hardware.
●The BUF16820 uses TIs latest, small-geometry analog CMOS process, which makes it a very competitive choice for full production, not just evaluation.
●Programming of each output occurs through an industry-standard, two-wire serial interface. Unlike existing programmable buffers, the BUF16820 offers a high-speed mode that allows clock speeds up to 3.4MHz.
●For devices with a lower or higher channel count, please contact your local sales or marketing representative.
●The BUF16820 is available in an HTSSOP-32 PowerPAD package. It is specified from 40°C to +85°C.
● 14-CHANNEL GAMMA CORRECTION
● 2 VCOM OUTPUTS
● ON-CHIP OTP MEMORY
● 10-BIT RESOLUTION
● RAIL-TO-RAIL OUTPUT
● LOW SUPPLY CURRENT: 1mA/ch
● SUPPLY VOLTAGE: 8.5V to 18V
● DIGITAL SUPPLY: 2.0V to 5.5V
● INDUSTRY-STANDARD, TWO-WIRE INTERFACE: 3.4MHz HIGH-SPEED MODE
● HIGH ESD RATING:
●4kV HBM, 1kV CDM, 200V MM
● DEMO BOARD AND SOFTWARE AVAILABLE
● APPLICATIONS
● REPLACES RESISTOR-BASED GAMMA SOLUTIONS
● TFT-LCD REFERENCE DRIVERS
● DYNAMIC GAMMA CONTROL
●PowerPAD is a registered trademark of Texas Instruments.
●All other trademarks are the property of their respective owners.
Part 3D Model
