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Analog Devices Inc. LTC2662 300mA Current-Source-Output 16/12Bit DACs

Analog Devices LTC2662 Digital to Analog Converter is a five-channel, 16-bit/12-bit, current-source DAC, providing five high-compliance current source outputs with guaranteed 1V dropout at 200mA. The LTC2662 DAC supports load voltages of up to 32V. The LTC2662 DAC is offered in eight current ranges, programmable per channel, with full-scale outputs of up to 300mA. The channels of the LTC2662 can be paralleled to allow for ultrafine adjustments of large currents or for combined outputs of up to 1.5A.

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

The LTC2662 includes a precision integrated 1.25V reference (10ppm/°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 1.71V at clock rates up to 50MHz.

The LTC2662 is offered in a compact 5mm × 5mm QFN-32 Pb-free Package, and is available in Commercial (0°C to 70°C), Industrial (-40°C to 85°C), and Automotive (-40°C to 125°C) operating temperature grades.

Features

  • Per-channel programmable output ranges of 300mA, 200mA, 100mA, 50mA, 25mA, 12.5mA, 6.25mA, 3.125mA
  • Flexible 2.85V to 33V supply voltage
  • 1V Dropout guaranteed
  • Separate voltage supply per output channel
  • Internal switches to optional negative supply
  • Full 16-bit / 12-bit resolution at all ranges
  • Precision (10ppm/°C Max) internal reference or external reference input
  • Analog mux monitors voltages and currents
  • A/B Toggle via SPI or dedicated pin
  • 1.8V to 5V SPI Serial interface
  • Operating Junction Temperature (TJ) range
    • LTC2662C at 0°C to 70°C
    • LTC2662I at -40°C to 85°C
    • LTC2662H at -40°C to 125°C
  • 5mm × 5mm 32-Lead QFN Package
  • Pb-free

Applications

  • Tunable lasers
  • Semiconductor optical amplifiers
  • Resistive heaters
  • Current mode biasing
  • Proportional solenoid drive

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Typical Application Circuit

Application Circuit Diagram - Analog Devices Inc. LTC2662 300mA Current-Source-Output 16/12Bit DACs

Pin Configuration

Analog Devices Inc. LTC2662 300mA Current-Source-Output 16/12Bit DACs
Published: 2019-03-21 | Updated: 2023-08-21