LTC1456 Datasheet, PDF (1/8 Pages) Linear Technology – 12-Bit Rail-to-Rail Micropower DAC with Clear Input

FEATURES
s _{SO-8 Package}
s _{12-Bit Resolution}
s _{Buffered True Rail-to-Rail Voltage Output}
s _{Asynchronous Clear Input}
s _{Built-In Reference}
s _{Schmitt Trigger On Clock Input Allows Direct}
Optocoupler Interface
s _{Power-On Reset Clears DAC to 0V}
s _{3-Wire Cascadable Serial Interface}
s _{Maximum DNL Error: 0.5LSB}
s _{Low Cost}
U
APPLICATIONS
s _{Digital Calibration}
s _{Industrial Process Control}
s _{Automatic Test Equipment}
s _{Cellular Telephones}
LTC1456
12-Bit Rail-to-Rail
Micropower DAC
with Clear Input
DESCRIPTION
The LTC^®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.
TYPICAL APPLICATION
µP
TO
OTHER
DACS
Functional Block Diagram: 12-Bit Rail-to-Rail DAC with Clear Input
2 D_IN
4.5V TO 5.5V
8
V_CC
2.048V
1 CLK
3 CS/LD
12-BIT
SHIFT
REG
AND
DAC
LATCH
12-BIT
DAC
4 D_OUT
6 CLR _POWER-ON
RESET
GND
5
+
V_{OUT 7 RAIL-TO-RAIL}
VOLTAGE
–
OUTPUT
1456 TA01
Differential Nonlinearity
vs Input Code
0.5
0
–0.5
0 512 1024 1536 2048 2560 3072 3584 4095
CODE
1456 TA02
1