1 Features

1• AEC-Q100 Qualified with:

– Temperature Grade 3: –40°C to 85°C

– HBM ESD Classification 2

– CDM ESD Classification C4B

• 16-Channel P-Gamma, 2-Channel P-VCOM, 10-

Bit Resolution

• 16x Rewritable Nonvolatile Memory

• Two Independent Pin-Selectable Memory Banks

• Rail-to-Rail Output:

– 300-mV (Min) Swing-to-Rail (10 mA)

– > 300-mA (Max) I OUT

• Supply Voltage: 9 V to 20 V

• Digital Supply: 2 V to 5.5 V

• I2C™ Interface: Supports 400 kHz and 2.7 MHz

2 Application

TFT-LCD Reference Drivers

3 Description

The BUF16821-Q1 offers 16 programmable gamma

channels and two programmable VCOM channels. The final gamma and VCOM values can be stored in

the on-chip, nonvolatile memory. To allow for

programming errors or liquid crystal display (LCD)

panel rework, the device supports up to 16 write

operations to the on-chip memory.

The device has two separate memory banks, allowing

simultaneous storage of two different gamma curves

to facilitate switching between gamma curves. All

gamma and VCOM channels offer a rail-to-rail output

that typically swings to within 150 mV of either supply

rail with a 10-mA load. All channels are programmed

using an I2C interface that supports standard

operations up to 400 kHz and high-speed data

transfers up to 2.7 MHz.

The device is manufactured using Texas Instruments’

proprietary, state-of-the-art, high-voltage CMOS

process. This process offers very dense logic and

high supply voltage operation of up to 20 V. The

device is offered in an HTSSOP-28 PowerPAD™

package, and is specified from –40°C to +85°C.