MCP3426A7-E/MS

Analog To Digital Converters (ADC) Overview

The MCP3426A7-E/MS is a 16-bit Delta-Sigma Analog-to-Digital Converter (ADC) manufactured by Microchip Technology. It features two differential input channels and communicates via an I²C serial interface. The device integrates an on-board 2.048V voltage reference with ±0.05% accuracy and a programmable gain amplifier (PGA) supporting gains of 1, 2, 4, or 8. It operates on a single supply voltage ranging from 2.7V to 5.5V and supports data rates of 15 SPS at 16-bit resolution, 60 SPS at 14-bit resolution, and 240 SPS at 12-bit resolution. The component is housed in an 8-pin MSOP package.

Analog To Digital Converters (ADC) Feature Summary

• 16-bit resolution with differential inputs and integrated 2.048V reference
• On-board Programmable Gain Amplifier (PGA) with selectable gains of x1, x2, x4, or x8
• I²C interface supporting Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes
• Self-calibration of internal offset and gain errors for each 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 'A7' against official Microchip documentation to confirm factory-programmed I²C address settings, as this variant differs from standard models with configurable address pins. Ensure the MSOP-8 package thermal requirements are met for the intended operating temperature range of -40°C to +125°C.

Analog To Digital Converters (ADC) Selection Notes

Select this model for applications requiring high accuracy with minimal external components due to the integrated reference and PGA. The fixed I²C address associated with the 'A7' suffix requires careful bus addressing if multiple devices are used. Consider the 15 SPS maximum data rate at full 16-bit resolution when designing system timing constraints.

Analog To Digital Converters (ADC) Part Context

This component belongs to the MCP3426/7/8 family of multi-channel ΔΣ ADCs. While the MCP3426 typically offers user-configurable I²C addresses via external pins, the 'A7' designation indicates a specific factory-set address configuration. It shares core electrical characteristics with the MCP3426A series but is distinguished by its pre-defined communication address.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacements within the same family include other MCP3426 variants with different address configurations or packages, such as MCP3426A0-E/MS or MCP3426A3-E/SN. Verify that the substitute part's I²C address matches the system design or allows for reconfiguration.