MCP3426A1T-E/SN

Analog To Digital Converters (ADC) Overview

The MCP3426A1T-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 includes an on-board 2.048V voltage reference with ±0.05% accuracy and a programmable gain amplifier (PGA) offering gains of x1, x2, x4, or x8. It supports data rates of 15 SPS at 16-bit resolution, 60 SPS at 14 bits, and 240 SPS at 12 bits. Operating from a single 2.7V to 5.5V supply, it consumes low current and performs self-calibration of offset and gain for each conversion. The component is housed in an 8-pin SOIC package.

Analog To Digital Converters (ADC) Feature Summary

• 16-bit resolution with differential inputs and internal 2.048V reference
• On-board 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 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 'T' indicates tape-and-reel packaging rather than tube packaging. Confirm the 'E' suffix denotes the extended temperature range (-40°C to +125°C). Ensure the specific variant matches the required channel count and interface configuration for the target design.

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. Consider the 16-bit resolution limit when determining if higher precision is needed. Verify that the I²C address is fixed as programmed at the factory, unlike the MCP3427/2428 which allow user-configurable addresses via external pins.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MCP3426/7/8 family of multi-channel ΔΣ ADCs. While sharing identical electrical specifications regarding resolution, reference, and performance, the MCP3426 is distinguished by its fixed I²C address and dual-channel architecture. It serves as a low-power, high-precision solution for systems where board space and component count are constrained.

Analog To Digital Converters (ADC) Replacement Considerations

The MCP3426A0-E/SN and MCP3426A2-E/SN are functional equivalents within the same series, differing primarily in their factory-programmed I²C addresses. Other members like the MCP3427 offer configurable addresses but require additional external pins.