MAX22190ATJ+T

The MAX22190ATJ+T from Analog Devices is an IEC 61131-2 compliant industrial digital input device designed for robust operation in harsh environments. It features eight 24V current-sinking input channels that are translated to a serialized SPI-compatible output, interfacing with 3V to 5.5V logic levels.

This device offers high integration, reducing Bill of Materials (BOM) count and board space. It operates directly from a field supply ranging from 7V to 65V and is compatible with 3.3V or 5V logic. Key diagnostic features include wire-break detection, overtemperature monitoring, and low/missing 24V field supply detection, all of which can assert a FAULT output.

For flexibility, the MAX22190ATJ+T includes a programmable glitch filter on each input channel, with delays selectable from 50µs to 20ms or filter bypass. It also supports configurable IEC 61131-2 input types (1, 2, or 3) and input current limiting from 0.5mA to 3.4mA. The component is housed in a 5mm x 5mm TQFN package and operates within an ambient temperature range of -40°C to 125°C.

Applications for the MAX22190ATJ+T include Programmable Logic Controllers (PLCs), industrial automation, process automation, and building automation systems. Its robust design includes input protection to ±40V and ESD protection up to ±15kV air gap.