MCP4822T-E/SN

Overview

The MCP4822T-E/SN 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 supporting up to 20 MHz clock speeds. Key electrical parameters include a typical settling time of 4.5 µs, rail-to-rail output capability, and selectable unity or 2x gain. It supports software shutdown modes for power savings and operates within an extended temperature range of -40°C to +125°C.

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 with simultaneous latching via LDAC pin
• Software controllable shutdown mode for individual channel power management

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 'T' suffix indicates tape and reel packaging when ordering. Confirm the 'E' suffix corresponds to the extended industrial temperature range (-40°C to +125°C). Ensure the 'SN' suffix matches the required SOIC-8 package type. Cross-reference the specific datasheet revision DS20002249B for accurate timing specifications.

Selection Notes

Select this component for applications requiring dual-channel precision DACs with low power consumption. The internal reference eliminates the need for external components, simplifying board layout. Consider the 20 MHz SPI speed for high-throughput data updates. Verify that the 12-bit resolution meets the system's accuracy requirements for signal generation or calibration tasks.

Part Context

This part belongs to the MCP48X2 family, which includes 8-bit (MCP4802), 10-bit (MCP4812), and 12-bit (MCP4822) variants. All members share similar pinouts and SPI interfaces but differ in resolution and linearity performance. Single-channel versions are available as MCP48X1 parts. The T/E/SN suffixes define the packaging format, temperature grade, and physical footprint respectively.

Replacement Considerations

Direct functional substitutes within the same family include MCP4822-E/MS (MSOP package) and MCP4822-E/P (PDIP package). For higher resolution needs, consider the MCP4922 series which supports external references. Single-channel alternatives are MCP4821 or MCP4921.