BUF01900
BUF01901
SBOS337A − OCTOBER 2006 − REVISED OCTOBER 2006
Programmable Voltage Source
with Memory
FD EATURES
DESCRIPTION
The BUF01900 and BUF01901 provide a programmable
voltage output with 10-bit resolution. Programming of the
output occurs through an industry-standard, two-wire
serial interface. Once the correct VCOM voltage is
established it can easily be stored into the integrated
nonvolatile memory.
10-BIT RESOLUTION
D
D
D
D
D
D
D
RAIL-TO-RAIL OUTPUT
ONBOARD NONVOLATILE MEMORY
I
: 100mA
OUT
LOW SUPPLY CURRENT: 900µA
SUPPLY VOLTAGE: 7V to 18V
DIGITAL SUPPLY: 2.0V to 5.5V
An initial output voltage and adjustment range can be set
by an external resistor-divider. With its large output current
capability (up to 100mA), the BUF01900 and BUF01901
are ideally suited as programmable VCOM calibrators in
LCD panels.
INDUSTRY-STANDARD, TWO-WIRE
INTERFACE
The BUF01901 has the digital-to-analog converter (DAC)
output brought out directly. It has a slightly lower cost than
the BUF01900, and works very well with the integrated
D
HIGH ESD RATING:
2kV HBM, 500V CDM
V
COM in traditional gamma buffers such as the BUFxx702,
BUFxx703, BUFxx704 and BUF11705.
The BUF01900 and BUF01901 are both available in
TSSOP-8 and 3mm x 3mm DFN-10 packages. The
DFN-10 package (only 0.9mm in height) is especially
well-suited for notebook computers. Both devices are
specified from −40°C to +85°C.
AD PPLICATIONS
LCD PANEL V
CALIBRATION
COM
D
LCD PANEL BRIGHTNESS AND CONTRAST
CONTROL
D
D
D
D
D
POTENTIOMETER REPLACEMENT
MOTOR DRIVE
Digital
2V to 5.5V
Analog
7V to 18V
BIAS
PROGRAMMABLE POWER SUPPLY
PROGRAMMABLE OFFSET ADJUSTMENT
ACTUATOR CONTROL
BUF01900
Voltage
Regulator
250k
Ω
4 x OTP
ROM
Switch
Control
10−Bit
DAC
Buffer
VCOM
BUF01900, BUF01901 RELATED PRODUCTS
FEATURES
PRODUCT
BUF11705
BUF12800
Input Control Logic
22V High Supply Voltage Gamma Buffers
12--Channel Programmable Buffer, 10-Bit, V
COM
COM
20-Channel Programmable Buffer, 10-Bit, V
BUF20800
BUF16820
BUF20820
SDA SCL A0
16-Channel Programmable Buffer with Memory
20-Channel Programmable Buffer with Memory
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a registered trademark of Texas Instruments. All other trademarks are the property of their respective owners.
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Copyright 2006, Texas Instruments Incorporated
www.ti.com
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