Description
The MCP3421A1T-E/CH from Microchip is a high-accuracy, 1-channel Delta-Sigma Analog-to-Digital Converter (ADC) designed for high-resolution measurement applications. Offering up to 18-bit resolution, this device features an onboard 2.048V precision voltage reference, enabling a differential input range of ±2.048V. It integrates a programmable gain amplifier (PGA) with selectable gains (x1, x2, x4, x8), allowing for precise conversion of small input signals with high resolution.
Designed for efficiency and flexibility, the MCP3421 operates on a single supply (2.7V to 5.5V) and utilizes an I²C-compatible two-wire serial interface for easy communication. It offers user-selectable conversion rates of 3.75, 15, 60, or 240 samples per second, along with both continuous and one-shot conversion modes. With its low power consumption and self-calibration features, this ADC is an ideal solution for industrial instrumentation, sensor interfacing, and battery-powered data acquisition systems.
Key Features
- 18-Bit Resolution: High-precision conversion for demanding sensing applications.
- Integrated PGA: Programmable gain settings (x1, x2, x4, x8) for flexible signal amplification.
- Precision Reference: Onboard 2.048V reference with a low 5ppm/°C drift.
- Flexible Sampling: User-configurable rates (3.75, 15, 60, or 240 SPS).
- Conversion Modes: Supports both continuous and one-shot conversion modes.
- Self-Calibration: Automatically performs internal offset and gain calibration for every conversion.
- Low Power Design: Draws only 145µA at 3V, perfect for portable and battery-operated electronics.
- High Accuracy: Excellent linearity with a maximum Integral Non-Linearity (INL) of 10ppm of Full Scale Range (FSR).
Applications
- Industrial Instrumentation: Accurate monitoring in automated control systems.
- Sensor Interfacing: Ideal for strain gauges, thermocouples, and pressure sensors.
- Portable Medical Devices: Reliable and high-resolution data acquisition for health monitors.
- Battery-Powered Data Loggers: Low-power consumption extends battery life in remote sensing applications.
Package Includes
- 1 x MCP3421A1T-E/CH 18-bit Delta-Sigma ADC (6-pin)
Technical Specifications
| Parameter | Specification |
|---|---|
| Device Model | MCP3421A1T-E/CH |
| Resolution | 18-bit |
| Sampling Rate | Up to 240 SPS (Default 3.75 SPS) |
| Data Interface | I²C (Two-wire) |
| Supply Voltage | 2.7V to 5.5V |
| Number of Pins | 6 Pins |
| Architecture | Delta-Sigma |
Note: Product images are shown for illustrative purposes only and may differ from the actual product. For detailed timing diagrams, register configurations, and electrical specifications, please refer to the official Microchip MCP3421 datasheet.
