Reliable Data Acquisition with 4-20mA Current Loop Receiver Chips
In industrial and SCADA systems, the 4-20mA current loop is a standard for robust, long-distance analog signal transmission. However, accurately measuring and interpreting this current signal at the receiver end is critical. The receiver must convert the current back into a precise digital value, requiring sensitive analog-to-digital conversion (ADC), protection against common-mode noise and surges, and often complex isolation to prevent ground loops. Implementing this correctly in a hostile industrial environment is challenging.
This category features specialized 4-20mA Current Loop Receiver Chips designed to simplify the measurement of these essential industrial signals. These integrated circuits act as a secure, high-precision bridge, converting the input current into a clean, digital value accessible by your main microcontroller, typically via an I2C or SPI interface.
Achieve High Accuracy and Robust Protection
Our 4-20mA Receiver modules handle the entire measurement process internally:
Precision Sensing: They incorporate the necessary shunt resistors and high-resolution Analog-to-Digital Converters (ADCs) to accurately translate the 4-20mA current into a digital value.
Noise Immunity: Dedicated signal conditioning and filtering dramatically improve Common-Mode Rejection Ratio (CMRR), ensuring the measured value is free from line noise and electromagnetic interference (EMI).
Protection & Isolation: Built-in safeguards protect the host microcontroller from overcurrent, reverse polarity, and transient voltage events common in industrial wiring mistakes.
By utilizing a dedicated Receiver chip, you offload the complex analog and safety design from your central processor. This not only guarantees reliable, high-accuracy measurement but also significantly reduces engineering time, testing overhead, and the bill of materials, allowing you to focus on the core logic of your application.