Quad 12-Bit Rail-to-Rail Micropower DACs

The LTC1458/LTC1458L are complete single supply, quad rail-to-rail voltage output, 12-bit digital-to-analog converters (DACs) in SO-28 and SSOP-28 packages.They include an output buffer amplifier with variable gain (×1 or ×2) and an easy-to-use 3-wire cascadable serial interface.

The LTC1458 has an on-board reference of 2.048V and a full-scale output of 4.095V in a ×2 gain configuration. It operates from a single 4.5V to 5.5V supply dissipating only 5.5mW (ICC = 1.1mA typ).

The LTC1458L has an onboard 1.22V reference and a full-scale output of 2.5V in a ×2 gain configuration. It operates from a single supply of 2.7V to 5.5V dissipating 2.4mW.

Excellent DNL, low supply current and a wide range of built-in functions allow these parts to be used in a host of applications when flexibility, power and single supply operation are important.

Applications

* Digital Calibration

* Industrial Process Control

* Automatic Test Equipment

* Low Power Systems

* Quad 12-Bit DAC

* Buffered True Rail-to-Rail Voltage Output

* Maximum DNL Error: 0.5LSB

* 5V Operation, ICC: 1.1mA Typ (LTC1458)

* 3V Operation, ICC: 800µA Typ (LTC1458L)

* Internal or External Reference Operation

* Settling Time: 14µs to ±0.5LSB

* Schmitt Trigger On Clock Input Allows Direct Optocoupler Interface

* Power-On Reset and CLR Pin

* SSOP-28 Package

* 3-Wire Cascadable Serial Interface with 250kHz Update Rate

* Low Cost