Dual 12-Bit Rail-to-Rail Micropower DAC

The LTC1448 is a dual rail-to-rail voltage output, 12-bit digital-to-analog converter (DAC). It includes rail-to-rail output buffer amplifiers and an easy-to-use 3-wire serial interface. It is available in 8-pin SO and PDIP packages and provides the smallest footprint of any dual 12-bit DAC.

The LTC1448 has an external reference input pin (REF) and its outputs swing from 0V to REF. The REF input can be tied to VCC providing rail-to-rail operation from supplies of 2.7V to 5.5V. (For devices with internal reference see the LTC1446 data sheet.) The LTC1448 dissipates 2.5mW from a 5V supply.

The low power supply current and the small SO-8 package make the LTC1448 ideal for battery-powered applications.

Applications

* Digital Calibration

* Industrial Process Control

* Automatic Test Equipment

* Cellular Telephones

* SO-8 Package

* 12-Bit Resolution

* Buffered True Rail-to-Rail Voltage Output

* External Reference Input Can Be Tied to VCC

* Output Swings from 0V to VREF

* 3V and 5V Supply Operation

* Schmitt Trigger on Clock Input Allows Direct Optocoupler Interface

* Power-On Reset Clears DACs to 0V

* 3-Wire Serial Interface

* Maximum DNL Error: 0.5LSB

* Low Cost