LTC1257 Datasheet, PDF (1/12 Pages) Linear Technology – Complete Single Supply 12-Bit Voltage Output DAC in SO-8

LTC1257
Complete Single Supply
12-Bit Voltage Output
DAC in SO-8
FEATURES
s _{8-Pin SO Package}
s _{Buffered Voltage Output}
s _{Built-In 2.048V Reference}
s _{500µV/LSB with 2.048V Full Scale}
s _{1/2LSB Max DNL Error}
s _{Guaranteed 12-Bit Monotonic}
s _{3-Wire Cascadable Serial Interface}
s _{Wide Single Supply Range: VCC = 4.75V to 15.75V}
s _{Low Power: ICC Typ = 350µA with 5V Supply}
APPLICATI S
s _{Digital Offset/Gain Adjustment}
s _{Industrial Process Control}
s _{Automatic Test Equipment}
DESCRIPTIO
The LTC^®1257 is a complete single supply, 12-bit voltage
output D/A converter (DAC) in an SO-8 package. The
LTC1257 includes an output buffer amplifier, 2.048V
voltage reference and an easy to use three-wire cascadable
serial interface. An external reference can be used to
override the internal reference and extend the output
voltage range to 12V. The power supply current is a low
350µA when operating from a 5V supply, making the
LTC1257 ideal for battery-powered applications. The space-
saving 8-pin SO package and operation with no external
components provide the smallest 12-bit D/A system
available.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATI
Daisy-Chained Control Outputs
5V
0.1µF
V_CC D_IN
CLK
CONTROL OUTPUT 1
V_OUT
LTC1257
LOAD
µP
GND V_REF DOUT
0.1µF
CONTROL OUTPUT 2
V_OUT
V_CC D_IN
CLK
LTC1257
LOAD
GND V_REF D_OUT
TO NEXT DAC
1257 TA01
Differential Nonlinearity
vs Input Code
0.5
0.0
–0.5
0 512 1024 1536 2048 2560 3072 3584 4098
CODE
1257 TA05
1