MCP3426A3-E/SN

Analog To Digital Converters (ADC) Overview

The MCP3426A3-E/SN is a 16-bit Delta-Sigma Analog-to-Digital Converter (ADC) manufactured by Microchip Technology. It features two differential input channels and an integrated I²C serial interface. The device operates on a single supply voltage ranging from 2.7V to 5.5V. Key electrical specifications include a typical data rate of 15 SPS at 16-bit resolution, an internal 2.048V voltage reference with ±0.05% accuracy, and a Programmable Gain Amplifier (PGA) supporting gains of 1, 2, 4, or 8. The component is housed in an 8-pin SOIC package and supports an extended operating temperature range from -40°C to +125°C.

Analog To Digital Converters (ADC) Feature Summary

• 16-bit Delta-Sigma ADC architecture with two differential input channels
• Integrated 2.048V voltage reference and Programmable Gain Amplifier (PGA)
• I²C compatible serial interface supporting Standard, Fast, and High Speed modes
• Automatic self-calibration of internal offset and gain errors per conversion

Analog To Digital Converters (ADC) Applications

• Portable instrumentation and consumer goods
• Temperature sensing using RTDs, thermistors, and thermocouples
• Bridge sensing for pressure, strain, and force measurements
• Weigh scales and battery fuel gauges

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix 'E' confirms compliance with RoHS standards and the '-SN' suffix indicates the 8-pin Small Outline Integrated Circuit (SOIC) package. Confirm that the factory-programmed I²C address matches system requirements, as the MCP3426 lacks external address selection pins unlike the MCP3427/8 variants. Ensure the supply voltage remains within the 2.7V to 5.5V operational range.

Analog To Digital Converters (ADC) Selection Notes

Select this component when dual-channel differential measurement is required with high accuracy. The fixed factory address distinguishes it from the MCP3427, which allows user-configurable addressing via external pins. Consider the PGA settings to match the input signal amplitude to the 2.048V reference range. Verify that the I²C bus speed requirements align with the device's support for standard, fast, and high-speed modes.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MCP342X series of multi-channel ΔΣ analog-to-digital converters. While sharing identical electrical performance characteristics with the MCP3427 and MCP3428, the MCP3426 is specifically designed for applications requiring exactly two differential input channels. It serves as the 2-channel variant within the family, differing primarily in pin count and I²C address configuration options.

Analog To Digital Converters (ADC) Replacement Considerations

The MCP3426A0-E/SN is listed as a substitute part number within the same product family.