BUF08821 Datasheet | Texas Instruments

.ti. SBOS438D - AUGUST 2008 - REVISED JULY 2011 Programmable Gamma-Voltage Generator and V Calibrator with Integrated Two-Bank Memory Check for Samples: BUF08821 Features - 234 10-BIT RESOLUTION - 8-CHANNEL P-GAMMA - 1-CHANNEL P-V - 16x REWRITABLE NONVOLATILE MEMORY - TWO INDEPENDENT PIN-SELECTABLE MEMORY BANKS - RAIL-TO-RAIL OUTPUT: 300m V Minimum Swing-to-Rail (10m A) > 300m A Maximum IOUT - LOW SUPPLY CURRENT - SUPPLY VOLTAGE: 9V to 20V - DIGITAL SUPPLY: 2V to 5.5V - I2C™ INTERFACE: Supports 400k Hz and 3.4MHz Clock Frequency APPLICATIONS - TFT-LCD REFERENCE DRIVERS BKSEL Digital Analog (2.0V to 5.5V) (9V to 20V) DESCRIPTION The BUF08821 offers eight programmable gamma channels plus one programmable V channel. The final gamma and V 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 V channels offer a rail-to-rail output that typically swings to within 150m V of either supply rail with a 10m A load. All channels are programmed using an I2C interface that supports standard operations up to 400k Hz 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 Power PAD™ package. It is specified...