The MCP47FVBXX are Single-channel 8-bit buffered voltage output Digital-to-Analog Converters (DAC) with volatile memory and an SPI serial interface.
The VREF pin, the device Vdd or the internal band gap voltage can be selected as the DAC's reference voltage. When Vdd is selected, Vdd 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 Vdd/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:
1.8V to 2.7V reduced device specifications
Output Voltage Resolutions:
8-bit: 256 Steps
Fast Settling Time of 7.8 µs (typical)
DAC Voltage Reference Source Options:
External VREF pin (buffered or unbuffered)
Internal Band Gap (1.22V typical)
Output Gain Options:
Power-on/Brown-out Reset Protection
Disconnects output buffer (High Impedance)
Selection of VOUT pull-down resistors (100 kohm or 1 kohm)
Low Power Consumption:
Normal operation: <180 µA (Single), 380 µA (Dual)
Power-down operation: 650 nA typical
Supports ‘00’ and ‘11’ modes
Up to 20 MHz writes and 10 MHz reads
Input buffers support interfacing to low-voltage digital devices