Product details


Display type Automotive, LCD Unipolar IC integration Gamma Buffer, VCOM Vin (Min) (V) 9 Vin (Max) (V) 20 Source driver voltage (Min) (V) 9 Source driver voltage (Max) (V) 20 Level shifter/scan driver (ch) 0 Special function Gamma Buffer, I2C I/F, VCOM/OpAmp Topology Rating Automotive open-in-new Find other LCD & OLED display power & drivers

Package | Pins | Size

HTSSOP (PWP) 28 43 mm² 9.7 x 4.4 open-in-new Find other LCD & OLED display power & drivers


  • 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) IOUT
  • Supply Voltage: 9 V to 20 V
  • Digital Supply: 2 V to 5.5 V
  • I2C™ Interface: Supports 400 kHz and 2.7 MHz


    TFT-LCD Reference Drivers

PowerPAD is a trademark of Texas Instruments.
I2C is a trademark of NXP Semiconductors.
All other trademarks are the property of their respective owners.

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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.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 3
Type Title Date
* Datasheet BUF16821-Q1 Programmable Gamma-Voltage Generator and VCOM Calibrator with Integr datasheet May 05, 2014
Technical articles Automotive electronics design made easy Jul. 18, 2013
Technical articles John discusses benefits of LEDs in automobiles Jul. 16, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The BUF16821EVM-USB is a platform for evaluating the performance of the BUF16821 under various signal, reference, and supply conditions.

  • Easy to use hardware and software.
  • DUT socket allows screening/programming of many parts
  • DIP Adapter/Daughter board for thermal evaluation
  • External connections for stand alone applications

Software development

SBOC405.ZIP (89710 KB)
SBOC406.ZIP (1821 KB)

Design tools & simulation

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
  • (...)

CAD/CAE symbols

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HTSSOP (PWP) 28 View options

Ordering & quality

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