Integrated precision-matched current-sensing resistor and resistive divider
Reduced PLC and DCS module size, complexity, and cost
Analog Devices announced on the 19th the launch of two new multi-channel ±10V and 0-20mA precision ADCs that simplify the development of programmable logic controller (PLC) and distributed control system (DCS) modules.

Leveraging ADI's iPassives integrated precision passive technology, the AD4111 and AD4112 ADCs integrate precision-matched current-sense resistors and resistive dividers. Their high channel-to-channel matching simplifies calibration requirements, and their support for up to eight single-ended voltage inputs and four current inputs makes them ideal for use as reconfigurable platform solutions. This also reduces the size, complexity, and cost of PLC and DCS modules.

The AD4111 and AD4112 ADCs can accommodate input voltages of ±10 V while meeting performance specifications, and have a functional range of ±20 V, including overrange margin for the typical ±10 V input. They can also accommodate input currents of -0.5 to 24 mA while meeting performance specifications. It provides an absolute maximum rating of ±50V on the voltage pin and ±50mA on the current pin.

The AD4111 operates from a +5 V or +3.3 V single supply and uniquely enables open wire detection to detect when an external sensor or signal source is disconnected from the system input on a ±10 V voltage input.

When used with the ADuM5411 4-channel digital isolator, the AD4111 supports EMC/EMI standards of IEC 61000-2, IEC 61000-3, IEC 61000-4, IEC 61000-5, IEC 61000-6, and CISPR 11.