Overview
The BUF20800ATDCPRQ1 is a programmable voltage reference generator designed by Texas Instruments for gamma correction in TFT-LCD panels. This device utilizes TI's latest small-geometry analog CMOS process, making it highly competitive for full production. It offers 18 programmable outputs for gamma correction and two channels for VCOM adjustment, each with 10-bit resolution. This programmability replaces the traditional method of changing resistor values, allowing for quick and efficient adjustment of gamma voltages without hardware changes.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Gamma Correction Channels | 18 | - |
| Number of VCOM Channels | 2 | - |
| Resolution | 10-bit | - |
| Analog Supply Voltage | 7 V to 18 V | V |
| Digital Supply Voltage | 2.0 V to 5.5 V | V |
| Output Current per Channel (VCOM) | 100 mA | mA |
| Supply Current per Channel | 900 μA | μA |
| I2C Interface Speed | Up to 3.4 MHz | MHz |
| Operating Temperature Range | -40°C to +105°C | °C |
| Package Type | 38-HTSSOP (with PowerPAD) | - |
| ESD Rating | 4 kV HBM, 1 kV CDM, 200 V MM | - |
Key Features
- Programmable Outputs: 18 channels for gamma correction and 2 channels for VCOM adjustment, each with 10-bit resolution.
- Low Supply Current: 900 μA per channel.
- Wide Supply Voltage Range: Analog supply voltage from 7 V to 18 V and digital supply voltage from 2.0 V to 5.5 V.
- High-Speed I2C Interface: Supports clock speeds up to 3.4 MHz.
- High ESD Rating: 4 kV HBM, 1 kV CDM, 200 V MM.
- Rail-to-Rail Output: Outputs can swing close to the supply rails.
- Dynamic Gamma Control: Double-register structure allows pre-loading of register data and rapid updating of all channels simultaneously.
- AEC-Q100 Qualified: Suitable for automotive applications with Device Temperature Grade 1.
- Demo Board and Software Available: For easy evaluation and development.
Applications
- TFT-LCD Panels: Gamma correction and VCOM adjustment.
- Replacement of Resistor-Based Gamma Solutions: Eliminates the need for changing resistor values.
- Dynamic Gamma Control: Enables real-time adjustments for optimal display performance.
- Automotive Displays: AEC-Q100 qualified, making it suitable for automotive applications.
Q & A
- What is the BUF20800ATDCPRQ1 used for?
The BUF20800ATDCPRQ1 is used for gamma correction in TFT-LCD panels, providing 18 programmable outputs for gamma correction and two channels for VCOM adjustment.
- What is the resolution of the output channels?
The output channels have a 10-bit resolution.
- What is the supply voltage range for the BUF20800ATDCPRQ1?
The analog supply voltage ranges from 7 V to 18 V, and the digital supply voltage ranges from 2.0 V to 5.5 V.
- What is the maximum I2C interface speed?
The I2C interface supports clock speeds up to 3.4 MHz.
- What is the operating temperature range of the BUF20800ATDCPRQ1?
The operating temperature range is from -40°C to +105°C.
- Is the BUF20800ATDCPRQ1 suitable for automotive applications?
- What package type is the BUF20800ATDCPRQ1 available in?
- What is the ESD rating of the BUF20800ATDCPRQ1?
- Does the BUF20800ATDCPRQ1 support dynamic gamma control?
- Are demo boards and software available for the BUF20800ATDCPRQ1?
