概览

优势和特点

  • Per channel programmable output current ranges: 300 mA, 200 mA, 100 mA, 0 mA, 25 mA, 12.5 mA, 6.25 mA, and 3.125 mA
  • Flexible 2.1 V to VCC output supply voltages
  • Flexible single- or dual-supply operation
  • 0.6 V maximum dropout voltage guaranteed
  • Separate voltage supply per output channel
  • Internal switches to optional negative supply
  • Full 16-bit resolution at all ranges
  • Guaranteed operation −40°C to 125°C (H-grade)
  • Precision internal reference (10 ppm/°C maximum VREF temperature coefficient) or external reference
  • Analog multiplexer monitors voltages and currents
  • A/B toggle via SPI or dedicated pin
  • 1.71 V to VCC digital I/O supply
  • 32-Lead Lead Frame Chip Scale Package [LFCSP]

产品详情

The LTC2672-16 is a five-channel, 16-bit current source, digital-to-analog converter (DAC) that provides five high compliance current source outputs with guaranteed 600 mV dropout at 200 mA. There are eight current ranges that are programmable per channel with full-scale outputs of up to 300 mA. The channels can be paralleled to allow either ultrafine adjustments of large currents or combined outputs of up to 1.5 A. A dedicated supply pin is provided for each output channel. Each channel can be operated from 2.1 V to VCC, and internal switches allow any output to be pulled to the optional negative supply. The LTC2672-16 includes a precision integrated 1.25 V reference (10 ppm/°C maximum), with the option to use an external reference. The serial peripheral interface (SPI) compatible, 3-wire serial interface operates on logic levels as low as 1.71 V and at clock rates as high as 50 MHz.

Note than throughout this data sheet, multifunction pins, such as CS/LD, are referred to by the entire pin name or by a single function of the pin.

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Part#
Resolution
# of Channels
Output Range
DAC INL (max)
DAC DNL (max)
Data Input Interface
14
6
−60mA to 0mA, −60mA to 300mA, 100mA, 140mA, 150mA, 200mA, 250mA, 300mA, 45mA, 55mA
1
1
SPI

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