BUF08630 8-CH Gamma-Voltage Generator w/Adjustable Gain Vcom & 1/2 AVDD Topology | TI.com

BUF08630
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8-CH Gamma-Voltage Generator w/Adjustable Gain Vcom & 1/2 AVDD Topology

 

Description

The BUF08630 offers eight programmable gamma channels and one programmable VCOM channel.

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 BUF08630 supports up to 16 write operations to the on-chip memory.

The BUF08630 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 a two-wire interface that supports standard operations up to 400 kHz, and high-speed data transfers up to 3.4 MHz.

The BUF08630 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 BUF08630 is available in a 20-pin QFN package, and is specified from –40°C to +95°C.

Features

  • 10-Bit Resolution
  • 8-Channel P-Gamma
  • 1-Channel P-VCOM
  • High Slew Rate VCOM: 45 V/µs
  • 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
  • Low Supply Current
  • Supply Voltage: 9 V to 20 V
  • Digital Supply: 2 V to 5.5 V
  • Two-Wire Interface:
    • Supports 400 kHz and 3.4 MHz
  • 1/2 AVDD Capability
  • APPLICATIONS
    • TFT-LCD Reference Drivers

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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
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 Samples not available 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    
BUF16821-Q1 Order now Automotive
LCD Unipolar    
Gamma Buffer
VCOM    
9     20     9