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Texas Instruments
BUF16821-Q1 Programmable Gamma-Voltage Generator and VCOM Calibrator with Integrated Two-Bank Memory

The BUF16821-Q1 offers 16 programmable gamma channels and two programmable VCOM channels. 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 device supports up to 16 write operations to the on-chip memory.
The device 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 an I2C interface that supports standard operations up to 400 kHz and high-speed data transfers up to 2.7 MHz.
The device 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 20 V. The device is offered in an HTSSOP-28 PowerPAD™ package, and is specified from –40°C to +85°C.

• AEC-Q100 Qualified with:
   – Temperature Grade 3: –40°C to 85°C
   – HBM ESD Classification 2
   – CDM ESD Classification C4B
• 16-Channel P-Gamma, 2-Channel P-VCOM, 10-Bit Resolution
• 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
• Supply Voltage: 9 V to 20 V
• Digital Supply: 2 V to 5.5 V
• I2C™ Interface: Supports 400 kHz and 2.7 MHz

   TFT-LCD Reference Drivers

other parts : BUF16821AIPWPRQ1  B16821Q1  
BUF16821-Q1 PDF


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