MCP4822-E/P

Overview

The MCP4822-E/P is a dual-channel, 12-bit buffered voltage output Digital-to-Analog Converter (DAC) manufactured by Microchip Technology. It operates on a single supply voltage ranging from 2.7V to 5.5V and features an internal 2.048V voltage reference. The device utilizes a resistive string architecture with SPI-compatible serial interface support up to 20 MHz. Key electrical specifications include a typical settling time of 4.5 µs, INL error of ±2 LSB, and DNL error of ±0.75 LSB. It supports selectable unity or 2x gain outputs and includes individual channel shutdown modes for power conservation.

Feature Summary

• Dual-channel 12-bit resolution with rail-to-rail buffered voltage outputs
• Integrated 2.048V internal voltage reference with low temperature coefficient
• SPI compatible serial interface supporting simultaneous latching via LDAC pin
• Individual channel software shutdown mode reducing current consumption

Applications

• Set point or offset trimming in industrial control systems
• Sensor calibration for temperature, pressure, and humidity compensation
• Precision selectable voltage reference generation
• Portable instrumentation requiring battery-powered operation
• Calibration of optical communication devices

Procurement Notes

Verify the package type matches the required form factor, as the -E/P suffix indicates an 8-pin PDIP package. Confirm that the operating environment falls within the specified -40°C to +125°C temperature range. Ensure the design accounts for the specific SPI timing requirements and power-on reset behavior described in the datasheet to guarantee reliable initialization.

Selection Notes

Select this component when dual-channel 12-bit precision is required with minimal external components due to the integrated reference. Consider the PDIP package only if through-hole mounting is necessary; otherwise, SOIC or MSOP variants may offer better thermal or space characteristics. Evaluate the 2.7V to 5.5V supply range against system power constraints and verify that the 4.5 µs settling time meets the application's speed requirements.

Part Context

The MCP4822-E/P belongs to the MCP48X2 product family, which includes 8-bit (MCP4802), 10-bit (MCP4812), and 12-bit (MCP4822) variants. All members share identical pinouts, interfaces, and core architectures, differing primarily in resolution and associated linearity specifications. This family is designed for applications requiring high accuracy and low noise performance in consumer and industrial settings.

Replacement Considerations

Direct functional substitutes within the same family include MCP4812-E/P (10-bit) and MCP4802-E/P (8-bit). Single-channel equivalents are available as MCP4821-E/P. For external reference designs, consider the MCP49X2 series, though these require external VREF connections.