MAXREFDES4 Campbell Reference Design

Analog Devices Inc. MAXREFDES4 Campbell Reference Design is a 16-bit high-accuracy industrial analog front end (AFE) that accepts a 4-20mA current loop or a 0.2V to 4.096V voltage input signal, and features isolated power and data—all integrated into a small form factor. The Campbell design integrates a precision low-noise buffer (MAX44250), a high-accuracy ADC (MAX11100), an ultra-high-precision 4.096V voltage reference (MAX6126), 600V_RMS data isolation (MAX14850), and isolated/regulated 5V power rails (MAX256/MAX1659). This AFE solution can be used in any application that needs high-accuracy analog-to-digital conversion, but it is mainly targeted for industrial sensors, industrial automation, process control, programmable logic controllers (PLCs), and medical applications.