LTC1257_15 Datasheet, PDF (1/12 Pages) Linear Technology – Complete Single Supply 12-Bit Voltage Output DAC in SO-8

FEATURES
n _{8-Pin SO Package}
n _{Buffered Voltage Output}
n _{Built-In 2.048V Reference}
n _{500µV/LSB with 2.048V Full Scale}
n _{1/2LSB Max DNL Error}
n _{Guaranteed 12-Bit Monotonic}
n _{3-Wire Cascadable Serial Interface}
n _{Wide Single Supply Range: VCC = 4.75V to 15.75V}
n _{Low Power: ICC Typ = 350µA with 5V Supply}
APPLICATIONS
n _{Digital Offset/Gain Adjustment}
n _{Industrial Process Control}
n _{Automatic Test Equipment}
LTC1257
Complete Single Supply
12-Bit Voltage Output
DAC in SO-8
DESCRIPTION
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 volt-
age reference and an easy to use 3-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.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
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
1257fc
1