Features

• 14-Bit Monotonic Over Temperature
• Smallest Dual 14-Bit DAC: 16-Lead Narrow SSOP Package
• Individually Programmable Speed/Power:
  3.5µs Settling Time at 750µA
  8µs Settling Time at 450µA
• 3V to 5V Single Supply Operation
• Maximum Update Rate: 0.9MHz
• Buffered True Rail-to-Rail Voltage Outputs
• User Selectable Gain
• Power-On Reset and Clear Function
• Schmitt Trigger On Clock Input Allows Direct Optocoupler Interface

Typical Application

Description

The LTC®1654 is a dual, rail-to-rail voltage output, 14-bit digital-to-analog converter (DAC). It is available in a 16-lead narrow SSOP package, making it the smallest dual 14-bit DAC available. It includes output buffer amplifiers and a flexible serial interface.

The LTC1654 has REFHI pins for each DAC that can be driven up to V_CC. The output will swing from 0V to V_CC in a gain of 1 configuration or V_CC/2 in a gain of 1/2 configuration. It operates from a single 2.7V to 5.5V supply.

The LTC1654 has two programmable speeds: a FAST and SLOW mode with ±1LSB settling times of 3.5µs or 8µs respectively and supply currents of 750µA and 450µA in the two modes. The LTC1654 also has shutdown capability, power-on reset and a clear function to 0V.