BUF16821 16-CH Gamma-Voltage Generator and Vcom Calibrator with Integrated Two-Bank Memory | TI.com

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.

Parametrics

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Part number Order Display type IC integration Vin (Min) (V) Vin (Max) (V) Source driver voltage (Min) (V) Source driver voltage (Max) (V) Level shifter/scan driver (ch) Special function Topology Type Rating Package size: mm2:W x L (PKG) Package Group
BUF16821 Order now LCD Unipolar     Gamma Buffer
VCOM    
9     20     9     20     0     VCOM/OpAmp
I2C I/F
Gamma Buffer    
        Catalog     28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)     HTSSOP | 28    
BUF08630 Order now LCD Unipolar     Gamma Buffer
VCOM    
9     20     9     20     0     VCOM/OpAmp
I2C I/F
Gamma Buffer    
        Catalog     20VQFN: 25 mm2: 5 x 5 (VQFN | 20)     VQFN | 20    
BUF08821 Order now LCD Unipolar     Gamma Buffer
VCOM    
9     20     9     20     0     VCOM/OpAmp
I2C I/F
Gamma Buffer    
        Catalog     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)     HTSSOP | 20    
BUF08832 Samples not available LCD Unipolar     Gamma Buffer
VCOM    
9     20     9     20     0     VCOM/OpAmp
I2C I/F
Gamma Buffer    
        Catalog     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)     HTSSOP | 20    
BUF12800 Samples not available LCD Unipolar     Gamma Buffer     7     18     7     18     0     I2C I/F
Gamma Buffer    
        Catalog     24HTSSOP: 34 mm2: 4.4 x 7.8 (HTSSOP | 24)     HTSSOP | 24    
BUF12840 Samples not available LCD Unipolar     Gamma Buffer     9     20     9     20     0     I2C I/F
Gamma Buffer    
        Catalog     24VQFN: 16 mm2: 4 x 4 (VQFN | 24)     VQFN | 24    
BUF16821-Q1 Order now Automotive
LCD Unipolar    
Gamma Buffer
VCOM    
9     20     9