MAX31915AUI+

MAX31915AUI+ is an industrial, octal, digital input translator. It translates and conditions the 24V digital output of sensors and switches used in industrial, process, and building automation to 5V CMOS-compatible signals required by microcontrollers. It provides the frontend interface circuit of a PLC digital input module. The signal voltage translation is performed in conjunction with input current limiting and lowpass filtering. Input current-limiting allows a significant reduction in power consumed from the field-supply voltage, as compared to traditional discrete resistor-divider implementations. Selectable on-chip lowpass filters allow flexible debouncing and filtering of sensor inputs based on the application. When no filtering is selected, the IC is capable of detecting pulses as short as 0.75µs at its field inputs. Applications include digital input modules for PLCs, industrial automation, building automation, process automation.

• 7V to 36V wide operating field supply range
• Device can be optionally powered from the logic side using a 5V supply
• Low power and low heat dissipation, very low quiescent current
• Extremely accurate and stable input current limiters
• Configurability enables a wide range of standard and custom applications
• High integration reduces BOM count and board space
• 8 CMOS logic outputs for high-speed simultaneous transfer of all input states to the controller
• On-chip 5V regulator, on-chip overtemperature indicator, on-chip field-supply voltage monitor
• 38 TSSOP-EP package
• Temperature range from -40°C to +125°C

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