BUF16821-Q1 Datasheet, PDF (1/38 Pages) Texas Instruments – Programmable Gamma-Voltage Generator

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BUF16821-Q1
SBOS712 – MAY 2014
BUF16821-Q1 Programmable Gamma-Voltage Generator and
VCOM Calibrator with Integrated Two-Bank Memory
1 Features
•1 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) I_OUT
• Supply Voltage: 9 V to 20 V
• Digital Supply: 2 V to 5.5 V
• I²C™ Interface: Supports 400 kHz and 2.7 MHz
2 Application
TFT-LCD Reference Drivers
Functional Block Diagram
Digital
Analog
BKSEL ^{(2.0 V to 5.5 V) (9 V to 20 V)}
1
OUT1
3 Description
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.
PART NUMBER
BUF16821-Q1
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
HTSSOP (28)
9.70 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
OUT2
SDA
SCL
Control IF
A0
OUT15
OUT16
BUF16821-Q1
VCOM1
VCOM2
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.