MCP3424T-E/SL

Analog To Digital Converters (ADC) Overview

The MCP3424T-E/SL is a four-channel, 18-bit Delta-Sigma analog-to-digital converter (ADC) manufactured by Microchip Technology. It features an integrated I²C interface, a 2.048V internal voltage reference, and a programmable gain amplifier (PGA) with gains of 1, 2, 4, or 8. The device supports data rates ranging from 3.75 SPS at 18-bit resolution to 240 SPS at 12-bit resolution. It operates on a single supply voltage between 2.7V and 5.5V and includes automatic self-calibration for offset and gain errors. The component is housed in a 14-pin TSSOP package and is rated for an extended operating temperature range of -40°C to +125°C.

Analog To Digital Converters (ADC) Feature Summary

• Four differential input channels with selectable PGA gains (x1, x2, x4, x8)
• Integrated 2.048V voltage reference with ±0.05% accuracy
• I²C serial interface supporting Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes
• Automatic self-calibration of internal offset and gain per conversion

Analog To Digital Converters (ADC) Applications

• Temperature sensing using RTDs, thermistors, and thermocouples
• Bridge sensing for pressure, strain, and force measurements
• Weigh scales and portable instrumentation
• Battery fuel gauges and factory automation equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix 'T' indicates tape-and-reel packaging when sourcing this component. Confirm that the '-E' suffix corresponds to the industrial temperature grade (-40°C to +85°C) if operation within the full extended range (-40°C to +125°C) is not required, as datasheet specifications may vary between grades. Ensure the I²C address pins are configured correctly for the target system topology.

Analog To Digital Converters (ADC) Selection Notes

Select the MCP3424T-E/SL when four independent differential channels are required in a compact surface-mount package. The choice between 12-bit, 14-bit, 16-bit, or 18-bit resolution should be based on the necessary signal-to-noise ratio versus the required sampling speed. Consider the input source impedance carefully, as the switched-capacitor input stage requires adequate settling time for accurate conversions.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MCP342X family of high-precision ADCs. The MCP3424 specifically provides four channels, whereas the MCP3422 and MCP3423 offer two channels. All devices in the series share identical electrical characteristics, including the Delta-Sigma architecture, internal reference, and PGA capabilities, differing primarily in channel count and I²C address configuration options.

Analog To Digital Converters (ADC) Replacement Considerations

Direct functional replacements within the same package include other MCP3424 variants with different temperature grades or packaging options, such as MCP3424-E/ST (SOIC-14). Cross-family replacements like the MCP3422 or MCP3423 require adapting the design for fewer channels.