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    Parts    Microchip MCP3xxx ADC Family    MCP3424    MCP3424-E/ST
MCP3424-E/ST

MCHPMCP3424-E/ST

Microchip Technology
18 Bit Analog to Digital Converter 4 Input 1 Sigma-Delta 14-TSSOP
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Overview

The MCP3424-E/ST is a high-resolution 18-bit delta-sigma analog-to-digital converter featuring four differential input channels and a programmable gain amplifier (PGA). It operates via a standard I2C interface and includes an internal precision voltage reference and on-board oscillator, making it a complete solution for precision multi-channel measurements.

Why Choose This Part

The device features self-calibration for offset and gain errors, ensuring long-term accuracy without user intervention. Its selectable I2C address pins allow up to eight devices on a single bus, providing a scalable solution for high-density sensor arrays while maintaining a low current footprint.

Applications

Temperature Measurement
High resolution and PGA gain settings (up to 8x) allow for direct interfacing with RTDs and thermocouples.
Weigh Scales
The 18-bit resolution and differential inputs are ideal for capturing small voltage changes from bridge-based load cells.
Battery Monitoring
Low power consumption of 0.145mA during operation supports long-term voltage monitoring in portable equipment.
Industrial Process Control
Four-channel capability enables monitoring of multiple 4-20mA loops or 0-5V sensor signals in automation environments.

Key Specifications

Features PGA, Selectable Address
Input Type Differential
Architecture Sigma-Delta
Configuration MUX-PGA-ADC
Mounting Type Surface Mount
Data Interface I2C
Number of Bits 18
Package / Case 14-TSSOP (0.173", 4.40mm Width)
Reference Type Internal
Number of Inputs 4
Operating Temperature -40degC ~ 125degC
Supplier Device Package 14-TSSOP
Number of A/D Converters 1
Voltage - Supply, Analog 2.7V ~ 5.5V
Voltage - Supply, Digital 2.7V ~ 5.5V
Sampling Rate (Per Second) 3.75

Getting Started

To begin development, connect the 14-TSSOP package to a 2.7V to 5.5V supply and interface the SDA/SCL lines to an I2C-capable microcontroller. Use the address pins (Adr0, Adr1) to set the device hardware address, and configure the internal register for the desired sample rate (3.75, 15, 60, or 240 SPS) to trade off speed for resolution.

Part of Microchip MCP3xxx ADC family » MCP3424

MCP3424 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
MCP3424-E/ST (this part) TSSOP-14 679
MCP3424-E/SL SOIC-14 14,083

Also Consider

ADS1115 TITexas Instruments - Provides faster sampling at 16-bit resolution for applications where 18-bit precision is not strictly required.
MCP3421 MCHPMicrochip Technology - A single-channel version in a compact SOT-23-6 package for space-constrained designs needing the same 18-bit performance.
ADS1220 TITexas Instruments - Offers 24-bit resolution and an integrated temperature sensor for ultra-high precision industrial applications.