MCP4822T-E/MS

Overview

The MCP4822T-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 parameters include a typical settling time of 4.5 µs, operating current of 415 µA, and rail-to-rail output capability. It supports selectable unity or 2x gain outputs and includes software 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 noise characteristics
• SPI compatible serial interface supporting simultaneous latching via LDAC pin
• Software-selectable shutdown mode for individual channel power reduction

Applications

• Set point or offset trimming in industrial control systems
• Sensor calibration and signal conditioning
• Precision selectable voltage reference generation
• Portable instrumentation and battery-powered devices

Procurement Notes

Verify the 'T' suffix indicates tape and reel packaging configuration distinct from tube variants. Confirm the 'E' designation aligns with the specified extended temperature range requirements. Ensure the MSOP-8 package dimensions match the target PCB footprint constraints before finalizing procurement orders.

Selection Notes

Select this component when dual-channel synchronization is required without external timing logic. The internal reference simplifies design compared to external reference DACs. Verify that the 12-bit resolution meets system accuracy needs and that the SPI interface polarity matches the host microcontroller settings.

Part Context

This part belongs to the MCP48X2 family, which includes 8-bit (MCP4802) and 10-bit (MCP4812) variants. The MCP4822 specifically provides 12-bit resolution. Single-channel versions exist as MCP4821. All share similar electrical characteristics and pinouts, differing primarily in resolution and channel count.

Replacement Considerations

Direct functional substitutes within the same family include MCP4822-E/SN (SOIC-8) and MCP4822-E/P (PDIP-8). Cross-family replacements like MCP4922 require external references. Verify package compatibility and pinout alignment when substituting.