MCP47FVB21A1-E/ST

The MCP47FVBXX are Single-channel 12-bit buffered voltage output Digital-to-Analog Converters (DAC) with volatile memory and an SPI serial interface.

The VREF pin, the device V_dd or the internal band gap voltage can be selected as the DAC's reference voltage. When V_dd is selected, V_dd is connected internally to the DAC reference circuit. When the VREF pin is used, the user can select the output buffer's gain to be 1 or 2. When the gain is 2, the VREF pin voltage should be limited to a maximum of V_dd/2.

These devices have an SPI-compatible serial interface. Write commands are supported up to 20 MHz while read commands are supported up to 10 MHz.

• Operating Voltage Range:
  • 2.7V to 5.5V - Full Specifications
  • 1.8V to 2.7V - Reduced Device Specifications
• Output Voltage Resolutions:
  • 12-bit: MCP47FVB2X (4096 Steps)
• Rail-to-Rail Output
• Fast Settling Time of 6 µs (typical)
• DAC Voltage Reference Source Options:
  • Device V_dd
  • External VREF pin (buffered or unbuffered)
  • Internal Band Gap (1.22V typical)
• Output Gain Options:
  • (1x) Unity
  • 2x (when not using internal V_dd as voltage source)
• Power-on/Brown-out Reset Protection
• Power-Down Modes:
  • Disconnects output buffer (High Impedance)
  • Selection of VOUT pull-down resistors (100 k? or 1 k?)
• Low Power Consumption:
  • Normal operation: <180 µA (Single), 380 µA (Dual)
  • Power-down operation: 650 nA typical
• I²C™ Interface:
  • Slave address o