LTC1456
12-Bit Rail-to-Rail
Micropower DAC
with Clear Input
FEATURES
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DESCRIPTION
The LTC
廬
1456 is a complete single supply, rail-to-rail
voltage output, 12-bit digital-to-analog converter (DAC) in
an SO-8 package. It includes a rail-to-rail output buffer
amplifier and an easy-to-use 3-wire cascadable serial
interface. The LTC1456 includes a CLR pin that asynchro-
nously clears the DAC to zero scale.
The LTC1456 has an internal 2.048V reference and a full-
scale output of 4.095V. It operates on a 4.5V to 5.5V
supply, dissipating 2.2mW.
The low power supply current and the space saving SO-8
package make the LTC1456 ideal for battery-powered
applications.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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SO-8 Package
12-Bit Resolution
Buffered True Rail-to-Rail Voltage Output
Asynchronous Clear Input
Built-In Reference
Schmitt Trigger On Clock Input Allows Direct
Optocoupler Interface
Power-On Reset Clears DAC to 0V
3-Wire Cascadable Serial Interface
Maximum DNL Error: 0.5LSB
Low Cost
APPLICATIONS
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Digital Calibration
Industrial Process Control
Automatic Test Equipment
Cellular Telephones
TYPICAL APPLICATION
Functional Block Diagram: 12-Bit Rail-to-Rail DAC with Clear Input
8
2 D
IN
1 CLK
碌P
3 CS/LD
12-BIT
SHIFT
REG
AND
DAC
LATCH
V
CC
4.5V TO 5.5V
2.048V
0.5
+
12-BIT
DAC
鈥?/div>
DNL ERROR (LSB)
V
OUT
7
RAIL-TO-RAIL
VOLTAGE
OUTPUT
4 D
OUT
TO
OTHER
DACS
6 CLR
POWER-ON
RESET
GND
5
1456 TA01
U
U
U
Differential Nonlinearity
vs Input Code
0
鈥?.5
0
512 1024 1536 2048 2560 3072 3584 4095
CODE
1456 TA02
1
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