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12-Bit Voltage Output Digital-to-Analog Converter with SPI Interface

MCP4921-E/P: MICROCHIP CORPORATION View Larger Image
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MICROCHIP CORPORATION
Jameco Part no. 2207401
Manufacturer MICROCHIP CORPORATION
Manufacturer no. MCP4921-E/P
  RoHS compliant
web exclusive
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$3.15

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100+ $2.79
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12-Bit Voltage Output Digital-to-Analog Converter with SPI Interface

The MCP4921 is a single channel 12-bit buffered voltage output digital-to-analog converters (DACs). The devices operate from a single 2.7V to 5.5V supply with an SPI compatible Serial Peripheral Interface. The user can configure the full-scale range of the device to be VREF or 2*VREF by setting the gain selection option bit (gain of 1 of 2).

The devices include double-buffered registers, allowing synchronous updates of the DAC output using the LDAC pin. These devices also incorporate a Power-on Reset (POR) circuit to ensure reliable power-up. The device utilizes a resistive string architecture with its inherent advantages of low Differential Non-Linearity (DNL) error and fast settling time. These devices are specified over the extended temperature range (+125°C).

The device provides high accuracy and low noise performance for consumer and industrial applications where calibration or compensation of signals (such as temperature, pressure and humidity) are required.

Features

  • Rail-to-Rail Output
  • SPI Interface with 20 MHz Clock Support
  • Simultaneous Latching of the DAC Output with LDAC Pin
  • Fast Settling Time of 4.5 µs
  • Selectable Unity or 2x Gain Output
  • External Voltage Reference Input
  • External Multiplier Mode
  • 2.7V to 5.5V Single-Supply Operation
  • Extended Temperature Range: -40°C to +125°C

    Applications

  • Set Point or Offset Trimming
  • Precision Selectable Voltage Reference
  • Motor Control Feedback Loop
  • Digitally-Controlled Multiplier/Divider
  • Calibration of Optical Communication Devices



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