MCP4822 Digital-to-Analog Converter: Datasheet, Pinout and MCP4822 Arduino

MCP4822 Pinout

Symbol

MCP4822 Symbol

Footprint

MCP4822 Footprint

3D Model

MCP4822 3D Model

The MCP4822 device is dual 8-bit, 10-bit and 12-bit buffered voltage output Digital-to-Analog Converters (DACs), respectively. The devices operate from a single 2.7V to 5.5V supply with SPI compatible Serial Peripheral Interface. The devices have a high precision internal voltage reference (VREF = 2.048V). The user can configure the full-scale range of the device to be 2.048V or 4.096V by setting the Gain Selection Option bit (gain of 1 of 2).

SPI Input Timing Data

Microchip Technology Inc., is a leader that provides microcontroller and analogue semiconductors. The microchip was headquartered in Chandler, Arizona. We are dedicated to offering low-risk product development, reducing total system cost and accelerating time to market. We mainly serve different fields of customers applications around the world. To provide prominent technical support along with reliable delivery and quality is our goal.

• MCP4822: Dual 12-Bit Voltage Output DAC 

• Rail-to-Rail Output 

• SPI Interface with 20 MHz Clock Support 

• Simultaneous Latching of the Dual DACs with LDAC pin 

• Fast Settling Time of 4.5 µs 

• Selectable Unity or 2x Gain Output 

• 2.048V Internal Voltage Reference 

• 50 ppm/°C VREF Temperature Coefficient 

• 2.7V to 5.5V Single-Supply Operation 

• Extended Temperature Range: -40°C to +125°C

MCP4822 Block Diagram

• Set Point or Offset Trimming 

• Sensor Calibration 

• Precision Selectable Voltage Reference 

• Portable Instrumentation (Battery-Powered) 

• Calibration of Optical Communication Devices

The MCP4822 device utilizes a 3-wire synchronous serial protocol to transfer the DAC's setup and input codes from the digital devices. The serial protocol can be interfaced to SPI or Microwire peripherals that is common on many microcontroller units (MCUs), including Microchip’s PIC® MCUs and dsPIC® DSCs. In addition to the three serial connections (CS, SCK and SDI), the LDAC signal synchronizes the two DAC outputs. By bringing down the LDAC pin to “low”, all DAC input codes and settings in the two DAC input registers are latched into their DAC output registers at the same time. Therefore, both DACA and DACB outputs are updated at the same time. The circuit below shows an example of the pin connections. Note that the LDAC pin can be tied low (VSS) to reduce the required connections from four to three I/O pins. In this case, the DAC output can be immediately updated when a valid 16 clock transmission has been received and the CS pin has been raised.

MCP4822 Typical Connection