MCP4802-E/SNVAO

Overview

The MCP4802-E/SNVAO is a dual-channel, 8-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 compatibility supporting up to 20 MHz clock speeds. Key electrical specifications 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 includes a Power-on Reset circuit.

Feature Summary

• Dual-channel 8-bit resolution with integrated 2.048V internal voltage reference
• SPI compatible serial interface with simultaneous latching via LDAC pin
• Rail-to-rail buffered voltage outputs with selectable gain settings
• Extended 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 VAO suffix indicates automotive qualification status as per Microchip documentation. Confirm package type is SOIC-8 through official datasheets. Check current availability directly with the manufacturer or authorized distributors. Ensure RoHS compliance matches project requirements. Validate that the specific revision aligns with design specifications.

Selection Notes

Select this component when dual-channel 8-bit precision is required within a small footprint. Consider the internal reference to reduce external component count. Evaluate the 2.7V to 5.5V supply range against system power constraints. Verify SPI interface compatibility with the host microcontroller. Assess thermal performance if operating near maximum temperature limits.

Part Context

This part belongs to the MCP48X2 family of dual-channel DACs. Related models include the MCP4812 with 10-bit resolution and the MCP4822 with 12-bit resolution. Single-channel variants are available as the MCP4801, MCP4811, and MCP4821. External reference versions exist in the MCP49X2 series.

Replacement Considerations

Direct functional substitutes within the same package include the MCP4802-E/SN. For higher resolution needs, consider the MCP4812-E/SN or MCP4822-E/SN. Single-channel alternatives are the MCP4801-E/SN. Verify pinout compatibility before substitution.