MCP4822-E/MS

Overview

The MCP4822-E/MS 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, operating current of 415 µA, and INL/DNL errors of ±2 LSB and ±0.2 LSB respectively at room temperature. It supports selectable unity or 2x gain outputs and includes individual channel shutdown modes for power savings.

Feature Summary

• Dual-channel 12-bit resolution with rail-to-rail buffered voltage outputs
• Integrated 2.048V internal voltage reference with selectable gain options
• SPI compatible serial interface supporting simultaneous latching via LDAC pin
• Extended industrial temperature range operation from -40°C to +125°C

Applications

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

Procurement Notes

Verify the specific suffix 'E/MS' corresponds to the MSOP-8 package and extended temperature grade when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering quantity matches the tube packaging format specified in the datasheet. Cross-reference the component marking code with the official identification guide to prevent counterfeit substitution.

Selection Notes

Select this component when dual-channel synchronization is required without external timing logic. The internal reference eliminates the need for external precision references, reducing board space. Verify that the 2.048V reference combined with the 2x gain option meets the maximum output swing requirements of the downstream circuitry. Consider the 4.5 µs settling time against the system update rate requirements.

Part Context

This part belongs to the MCP48X2 family, which includes 8-bit (MCP4802) and 10-bit (MCP4812) variants. All members share identical pinouts, interfaces, and architectural features, differing primarily in resolution and associated linearity error specifications. The MCP4822 provides the highest resolution within this specific dual-channel series.

Replacement Considerations

Direct functional substitutes within the same package and specification profile include the MCP4822-E/SN (SOIC-8) and MCP4822T-E/MS (Tape & Reel). Single-channel equivalents are available as the MCP4821 series. Higher performance alternatives may require the MCP49X2 series which supports external references.