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
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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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