MCP3426A2-E/MC

Analog To Digital Converters (ADC) Overview

The MCP3426A2-E/MC is a 16-bit Delta-Sigma Analog-to-Digital Converter (ADC) featuring two differential input channels and an I²C serial interface. It integrates an internal 2.048V voltage reference, a programmable gain amplifier (PGA), and an on-board oscillator. The device supports data rates of 15 SPS (16-bit), 60 SPS (14-bit), and 240 SPS (12-bit). It operates on a single supply voltage ranging from 2.7V to 5.5V and functions within an extended temperature range of -40°C to +125°C. The component performs self-calibration of offset and gain errors for each conversion.

Analog To Digital Converters (ADC) Feature Summary

• 16-bit resolution with differential inputs and integrated PGA (Gains: x1, x2, x4, x8)
• Internal 2.048V voltage reference with ±0.05% accuracy
• I²C interface supporting Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes
• Self-calibration of internal offset and gain 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
• Factory automation equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'MC' against official Microchip documentation to confirm the package type, as datasheets list SOIC, DFN, and MSOP options for the MCP3426 family. Ensure the operating environment stays within the specified -40°C to +125°C range and that the power supply remains between 2.7V and 5.5V for proper functionality.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a dual-channel, high-accuracy ADC with an I²C interface is required. The fixed factory-programmed I²C address distinguishes it from the MCP3427, which allows user-configurable addresses via external pins. Consider the thermal resistance of the MSOP-8 package if operating at higher ambient temperatures or with significant power dissipation.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MCP3426/7/8 family of low-noise, high-accuracy 16-bit Delta-Sigma ADCs. While electrically identical to other variants in terms of performance specifications, the MCP3426 is distinguished by its fixed I²C address configuration and availability in 8-pin packages including SOIC, DFN, and MSOP.

Analog To Digital Converters (ADC) Replacement Considerations

MCP3426A0-E/SN

Analog To Digital Converters (ADC) FAQ

How does the device handle input voltage ranges?

The differential full-scale input range is defined by the internal reference voltage (±2.048V divided by the PGA gain setting). Input voltages exceeding this range may cause saturation or leakage currents through ESD diodes.

What is the current consumption in standby mode?

In One-Shot conversion mode, the device enters a low-current standby mode automatically after conversion. Current consumption is typically less than 1 µA maximum during this period.

Does the device require external calibration?

No, the MCP3426 performs self-calibration of internal offset and gain errors for every conversion, ensuring accurate results over temperature variations and power supply fluctuations without external components.