LTC2662 5-Channel SoftSpan™ DAC

By Analog Devices Inc 106

LTC2662 5-Channel SoftSpan™ DAC

Analog Devices' LTC2662 5-channel, 16-bit/12-bit, current-source digital-analog-converters (DACs) provide five high-compliance current-source outputs with 1 V dropout at 200 mA. The devices support load voltages up to 32 V. There are eight current ranges that are programmable per channel and offer full-scale outputs of up to 300 mA. The channels can be paralleled to allow for ultra-fine adjustments of large currents or for combined outputs of up to 1.5 A.

A dedicated supply pin is provided for every output channel and can be operated from 2.85 V to 33 V. Internal switches allow outputs to be pulled to the optional negative supply.

The LTC2662 includes a precision integrated 1.25 V reference (10 ppm/°C maximum) with the option to use an external reference. The SPI/Microwire™-compatible 3-wire serial interface operates on logic levels as low as 1.71 V with clock rates up to 50 MHz.

  • Per-channel programmable output ranges: 300 mA, 200 mA, 100 mA, 50 mA, 25 mA, 12.5 mA, 6.25 mA, and 3.125 mA
  • Flexible 2.85 V to 33 V supply voltage
  • 1 V dropout
  • Separate voltage supply per output channel
  • Internal switches to an optional negative supply
  • Full 16-/12-bit resolution at all ranges
  • Operating temperature range: -40°C to +125°C
  • Precision (10 ppm/°C max.) internal or external reference input
  • Analog mux monitors voltages and currents
  • A/B toggle via SPI or dedicated pin
  • 1.8 V to 5 V SPI serial interface
  • 5 mm x 5 mm 32-lead QFN package
  • Tunable lasers
  • Semiconductor optical amps
  • Resistive heaters
  • Current-mode biasing
  • Proportional solenoid drives