Features

• SO-8 Package
• 12-Bit Resolution
• Buffered True Rail-to-Rail Voltage Output
• External Reference Input Can Be Tied to V_CC
• Output Swings from 0V to V_REF
• 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

Typical Application

Description

The LTC™1448 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 V_CC 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.