The MCP4901/4911/4921 devices are single-channel 8-bit, 10-bit, and 12-bit buffered voltage output Digital-to-Analog Converters (DACs). The devices run on a single 2.7V to 5.5V supply thanks to an SPI-compliant Serial Peripheral Interface. The user can adjust the device's full-scale range to VREF or 2*VREF by setting the gain selection option bit to VREF or 2*VREF.
To switch off the gadget, change the Configuration Register bit. In Shutdown mode, the output amplifier is programmed to show a known high resistance output load, and most internal circuits are shut off to save power.
The devices have double-buffered registers, which allow simultaneous updates of the DAC output through the LDAC pin.
Specification
· Technical
· Operating Temperature－-40°C~125°C
· Moisture Sensitivity Level (MSL)－1 (Unlimited)
· Supply Voltage－5V
· Operating Supply Voltage－5V
· Max Supply Voltage－5.5V
· Min Supply Voltage－2.7V
· Nominal Supply Current－175μA
· Supply Type－Single
· Input Offset Voltage (Vos)－820μV
· Data Interface－SPI
· Voltage - Supply, Analog－2.7V~5.5V
· Voltage - Supply, Digital－2.7V~5.5V
· Settling Time－4.5μs (Typ)
Construction
Where to Use
For consumer and industrial applications where signal calibration or correction (such as temperature, pressure, and humidity) is required, the devices provide high accuracy and low noise performance. PDIP, SOIC, MSOP, and DFN packages are available for the MCP4901/4911/4921 devices.
How to Use
The devices use a resistive string design, which has the benefits of minimal Differential Non-Linearity (DNL) error and quick settling. The expanded temperature range (+125°C) is given for these devices.
A low-power, precision CMOS amplifier buffers the DAC's output. This amplifier has a low noise floor and a low offset voltage. The gadget may function with output voltages close to the power supply rails thanks to the output stage. The analog output voltage range and load conditions may be found in Section 1.0 "Electrical Characteristics."
The amplifier is capable of driving large capacitive loads without oscillation in addition to resistive loads. VOUT can be utilized as a programmable voltage reference in a system because of the amplifier's power output.
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