BUF08821
8-CH Gamma-Voltage Generator and Vcom Calibrator with Integrated Two-Bank Memory
BUF08821
- 10-BIT RESOLUTION
- 8-CHANNEL P-GAMMA
- 1-CHANNEL P-VCOM
- 16x REWRITABLE NONVOLATILE MEMORY
- TWO INDEPENDENT PIN-SELECTABLE MEMORY BANKS
- RAIL-TO-RAIL OUTPUT:
300mV Minimum Swing-to-Rail (10mA)
> 300mA Maximum IOUT - LOW SUPPLY CURRENT
- SUPPLY VOLTAGE: 9V to 20V
- DIGITAL SUPPLY: 2V to 5.5V
- I2C INTERFACE: Supports 400kHz and 3.4MHz Clock Frequency
- APPLICATIONS
- TFT-LCD REFERENCE DRIVERS
The BUF08821 offers eight programmable gamma channels plus 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 BUF08821 supports up to 16 write operations to the on-chip memory.
The BUF08821 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 BUF08821 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 BUF08821 is offered in a HTSSOP-20 PowerPAD package. It is specified from –40°C to +85°C.
Technical documentation
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | Prog. Gamma-Voltage Generator & Vcom Calibrator w/ Integrated 2-Bank Memory datasheet (Rev. D) | 12 Jul 2011 | |
| EVM User's guide | BUF08821EVM-USB User's Guide (Rev. A) | 02 Aug 2016 | ||
| Application note | Driving Capacitive Loads with Gamma Buffers | 20 Nov 2012 | ||
| EVM User's guide | BUF08821EVM User's Guide | 24 Sep 2008 |
Design & development
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
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