
LTC1659
1
1659fa
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
12-Bit Rail-to-Rail
Micropower DAC in
MSOP Package
The LTC
1659 is a single supply, rail-to-rail voltage output,
12-bit digital-to-analog converter (DAC) in an MSOP pack-
age. It includes a rail-to-rail output buffer amplier and an
easy-to-use 3-wire cascadable serial interface.
The LTC1659 output swings from 0V to REF. The REF input
can be tied to VCC which can range from 2.7V to 5.5V.
This allows a rail-to-rail output swing from 0V to VCC. The
LTC1659 draws only 250μA from a 5V supply.
Its guaranteed ±0.5LSB maximum DNL makes the LTC1659
excel in calibration, control and trim/adjust applications.
The low power supply current and the small MSOP
package make the LTC1659 ideal for battery-powered
applications.
Functional Block Diagram: 12-Bit Rail-to-Rail DAC
■ Buffered True Rail-to-Rail Voltage Output
■ Maximum DNL Error: 0.5LSB
■ 12-Bit Resolution
■ Supply Operation: 3V to 5V
■ Output Swings from 0V to VREF
■ VREF Can Tie to VCC
■ Schmitt Trigger On Clock Input Allows Direct
Optocoupler Interface
■ Power-On Reset Clears DAC to 0V
■ 3-Wire Cascadable Serial Interface
■ Low Cost
■ 8-Lead SO and MSOP Packages
■ Digital Calibration
■ Industrial Process Control
■ Automatic Test Equipment
■ Cellular Telephones
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
–
+
12-BIT
DAC
2.7V TO 5.5V
GND
POWER-ON
RESET
TO
OTHER
DACS
12-BIT
SHIFT
REG
AND
DAC
LATCH
μP
DIN
VCC
REF
2
86
DOUT
4
5
1659 TA01
CLK
1
CS/LD
3
7
RAIL-TO-RAIL
VOLTAGE
OUTPUT
VOUT
CODE
0
DNL
ERROR
(LSB)
0.5
0
–0.5
1024
2048 2560
1659 TA02
512
1536
3072 3584 4095
Differential Nonlinearity
vs Input Code