BUF08630_14 Datasheet, PDF (1/35 Pages) Texas Instruments – Programmable Gamma-Voltage Generator and High Slew Rate VCOM

BUF08832
BUF08630
www.ti.com
SBOS515A – OCTOBER 2010 – REVISED AUGUST 2012
Programmable Gamma-Voltage Generator and High Slew Rate V_COM
with Integrated Two-Bank Memory plus 1/2 AVDD Topology
Check for Samples: BUF08630
FEATURES
1
•2 10-Bit Resolution
• 8-Channel P-Gamma
• 1-Channel P-V_COM
• High Slew Rate V_COM: 45 V/μs
• 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
• Low Supply Current
• Supply Voltage: 9 V to 20 V
• Digital Supply: 2 V to 5.5 V
• Two-Wire Interface:
– Supports 400 kHz and 3.4 MHz
• 1/2 AVDD Capability
APPLICATIONS
• TFT-LCD Reference Drivers
DESCRIPTION
The BUF08630 offers eight programmable gamma
channels and one programmable V_COM channel.
The final gamma and V_COM values can be stored in
the on-chip, nonvolatile memory. To allow for
programming errors or liquid crystal display (LCD)
panel rework, the BUF08630 supports up to 16 write
operations to the on-chip memory.
The BUF08630 has two separate memory banks,
allowing simultaneous storage of two different gamma
curves to facilitate switching between gamma curves.
All gamma and V_COM 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 a two-wire interface that supports
standard operations up to 400 kHz, and high-speed
data transfers up to 3.4 MHz.
The BUF08630 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
BUF08630 is available in a 20-pin QFN package, and
is specified from –40°C to +95°C.
BKSEL VSD
VCOM-FB
VCOM-VS VCOM-OUT VS
1
VCOM
DAC
VCOM-GND
OUT1
OUT2
OUT3
OUT4
VSH
RELATED PRODUCTS
FEATURES
22-channel gamma correction buffer
16-channel gamma correction buffer
12-channel gamma correction buffer
18-/20-channel programmable buffer, 10-Bit, V_COM
18-/20-Channel programmable buffer with memory
Programmable V_COM driver
22-V supply, traditional gamma buffers
High-resolution, fully-programmable LCD bias IC for TV
PRODUCT
BUF22821
BUF16821
BUF12800
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BUF01900
BUF11705
TPS65168
OUT5
OUT6
OUT7
OUT8
SDA
SCL
Control (IF and Memory)
A0
2k ´ 16 OTP
Memory
DGND
GND
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010–2012, Texas Instruments Incorporated