Description
The MCP3421A0T-E/CH from Microchip is a highly accurate, 1-channel Delta-Sigma Analog-to-Digital Converter (ADC) designed for high-resolution measurement applications. Featuring an integrated 2.048V precision voltage reference, it provides a differential input range of ±2.048V. The device also includes an onboard Programmable Gain Amplifier (PGA) with selectable gains (x1, x2, x4, x8), allowing for precise conversion of small-scale signals with superior 18-bit resolution.
Engineered for efficiency, the MCP3421A0T-E/CH utilizes a two-wire I²C™ compatible serial interface and operates from a wide single-supply range (2.7V to 5.5V). It offers configurable conversion rates of 3.75, 15, 60, or 240 samples per second, along with flexible continuous and one-shot conversion modes. With its self-calibration capabilities and low power draw, this ADC is an optimal choice for industrial instrumentation, sensor interfacing, and precision battery-powered data acquisition systems.
Key Features
- 18-Bit Resolution: Delivers high-precision digital conversion for accurate data acquisition.
- Integrated PGA: Programmable gain settings (x1, x2, x4, x8) for enhanced signal amplification.
- Precision Reference: Onboard 2.048V reference features a low 5ppm/°C drift for thermal stability.
- Flexible Sampling: User-configurable rates (3.75, 15, 60, or 240 SPS) to balance speed and resolution.
- Dual Conversion Modes: Supports both continuous and one-shot conversion for versatile system design.
- Self-Calibration: Automatically performs internal offset and gain calibration for every conversion, ensuring consistent accuracy.
- Low Power Consumption: Draws only 145µA at 3V, making it ideal for portable devices.
- High Linearity: Features an excellent Integral Non-Linearity (INL) of 10ppm of Full Scale Range (FSR) maximum.
Applications
- Industrial Instrumentation: High-accuracy monitoring and control in automated systems.
- Sensor Interfacing: Perfect for strain gauges, thermocouples, and precision pressure sensors.
- Portable Medical Equipment: Reliable data acquisition for health diagnostic tools.
- Battery-Powered Data Loggers: Power-efficient design extends battery life in remote sensing applications.
Package Includes
- 1 x MCP3421A0T-E/CH 18-bit Delta-Sigma ADC
Technical Specifications
| Parameter | Specification |
|---|---|
| Device Model | MCP3421A0T-E/CH |
| Resolution | 18-bit |
| Sampling Rate | 3.75 SPS (up to 240 SPS) |
| Data Interface | I²C (Two-Wire) |
| Input Channel Type | Differential / Single-Ended |
| Supply Voltage | 2.7V to 5.5V |
| Shipping Weight | 0.002 kg |
Note: Product images are shown for illustrative purposes only and may differ from the actual product. For complete timing diagrams, register configurations, and electrical characteristics, please refer to the official Microchip MCP3421 datasheet.
