16-CH Gamma-Voltage Generator and Vcom Calibrator with Integrated Two-Bank Memory - BUF16821

BUF16821 (ACTIVE)

16-CH Gamma-Voltage Generator and Vcom Calibrator with Integrated Two-Bank Memory

 

Description

The BUF16821 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 BUF16821 supports up to 16 write operations to the on-chip memory.

The BUF16821 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 150mV of either supply rail with a 10mA load. All channels are programmed using an I2C interface that supports standard operations up to 400kHz and high-speed data transfers up to 3.4MHz.

The BUF16821 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 20V. The BUF16821 is offered in a HTSSOP-28 PowerPAD™ package, and is specified from -40°C to +85°C.

Features

  • 10-BIT RESOLUTION
  • 16-CHANNEL P-GAMMA
  • 2-CHANNEL P-VCOM
  • 16x REWRITABLE NONVOLATILE MEMORY
  • TWO INDEPENDENT PIN-SELECTABLE MEMORY BANKS
  • RAIL-TO-RAIL OUTPUT
    • 300mV Min Swing-to-Rail (10mA)
    • > 300mA Max IOUT
  • LOW SUPPLY CURRENT
  • SUPPLY VOLTAGE: 9V to 20V
  • DIGITAL SUPPLY: 2V to 5.5V
  • I2C™ INTERFACE: Supports 400kHz and 3.4MHz
  • APPLICATIONS
    • 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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Parametrics Compare all products in LCD/OLED Display Bias Solutions

 
DisplayType
IC Integration
Vin (Min) (V)
Vin (Max) (V)
Pin/Package
Level Shifter/Scan Driver (Ch)
Special Function
BUF16821
LCD Bipolar
LCD Unipolar   
Gamma Buffer   
9   
20   
28HTSSOP   
N/A   
N/A   

Other qualified versions of BUF16821

Version Part Number Definition
Automotive BUF16821-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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