BUF20800-Q1 Automotive, 18-CH Gamma Voltage Generator with Two Programmable VCOM Channels | TI.com

BUF20800-Q1 (ACTIVE) Automotive, 18-CH Gamma Voltage Generator with Two Programmable VCOM Channels

 

Description

The BUF20800-Q1 is a programmable voltage reference generator designed for gamma correction in TFT-LCD panels. It provides 18 programmable outputs for gamma correction and two channels for VCOM adjustment, each with 10-bit resolution.

All channels are programmable using an I2C interface that supports high-speed data transfers up to 3.4 MHz.
This programmability replaces the traditional, time consuming process of changing resistor values to optimize the various gamma voltages and allows designers to determine the correct gamma voltages for a panel very quickly. Required changes are easily implemented without hardware changes.

The BUF20800-Q1 uses TI’s latest, small-geometry analog CMOS process, which makes it a very competitive choice for full production, not just evaluation.

For lower channel count, please contact your local sales or marketing representative.

The BUF20800-Q1 is available in an HTSSOP-38 package withPowerPAD™. It is specified from −40°C to +105°C.

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4
  • Low Supply Current: 900 µA/ch
  • Analog Supply Voltage: 7 V to 18 V
  • Digital Supply Voltage: 2 V to 5.5 V
  • 18-Channel Gamma Correction
  • 2-Channel Programmable VCOM: 50 mA IOUT
  • 10-Bit Resolution
  • Rail-to-Rail Output
  • I2C Interface
    • 3.4 MHz High-Speed Mode
  • Demo Board and Software Available

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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
BUF20800-Q1 Order now Automotive
LCD Bipolar
LCD Unipolar    
Gamma Buffer
VCOM    
7     18     7     18     0     VCOM/OpAmp
I2C I/F
Gamma Buffer    
        Automotive     38HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 38)     HTSSOP | 38    
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