MCP3422A4-E/SN

Analog To Digital Converters (ADC) Overview

The MCP3422A4-E/SN is an 18-bit delta-sigma analog-to-digital converter (ADC) from Microchip Technology. It features four differential input channels and operates on a single supply voltage ranging from 2.7V to 5.5V. The device integrates an internal 2.048V voltage reference, a programmable gain amplifier (PGA), and an oscillator. Communication is handled via an I2C interface supporting Standard, Fast, and High-Speed modes. Key electrical specifications include a typical supply current of 135 µA at 3V in continuous conversion mode and an operating temperature range of -40°C to +125°C.

Analog To Digital Converters (ADC) Feature Summary

• Four differential input channels with selectable PGA gains of x1, x2, x4, or x8
• Integrated 2.048V voltage reference with 15 ppm/°C drift
• Programmable data rates: 3.75 SPS (18-bit), 15 SPS (16-bit), 60 SPS (14-bit), and 240 SPS (12-bit)
• I2C interface with user-configurable address pins for multi-device systems

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 'E/SN' corresponds to the SOIC-14 package and extended temperature range (-40°C to +125°C). Confirm that the 'A4' designation indicates the four-channel variant within the MCP342X family. Ensure compatibility with the required I2C bus speed and voltage levels for the target application.

Analog To Digital Converters (ADC) Selection Notes

Select this component when four independent differential inputs are required in a compact form factor. The integrated PGA allows for amplification of weak signals without external components. Consider the trade-off between resolution and sampling rate; higher resolutions result in lower maximum data rates. Ensure the input signal remains within the ±2.048V/PGA full-scale range to avoid saturation.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MCP3422/3/4 family of low-power, high-resolution ADCs. While the MCP3422 offers two channels and the MCP3423 also provides two channels with configurable addresses, the MCP3424 variant specifically includes four differential channels. All members share identical electrical performance characteristics regarding resolution, noise, and power consumption.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements within the same family include other MCP3424 variants with different package options such as TSSOP. Cross-vendor alternatives would require careful evaluation of I2C compatibility, pinout differences, and register mapping.