Low-Power, Ultra-Small IO-Link Device Transceiver

The MAX14828 integrates the high-voltage functions commonly found in industrial sensors. The MAX14828 features one ultra low-power driver (C/Q) with active reverse-polarity protection. An auxiliary digital input is provided to allow firmware updates through a UART interface. Transient protection is simplified due to high voltage tolerance allowing the use of micro TVS.

The device features a flexible control interface. Pin-control logic inputs allow for operation with switching sensors that do not use a microcontroller. For sensors that use a microcontroller, an SPI interface is available with extensive diagnostics. For IO-Link operation, a UART interface is provided, allowing interfacing to the microcontroller UART. Finally, a multiplexed UART/SPI option allows using one serial microcontroller interface for shared SPI and UART interfaces.

The device includes on-board 3.3V and 5V linear regulators for low-noise analog/logic supply rails. The MAX14828 is available in a (4mm x 4mm) 24-pin TQFN package and a (2.5mm x 2.5mm) wafer-level package (WLP) and is specified over the extended -40°C to +125°C temperature range.

Applications

* Industrial Sensors * IO-Link Sensors and Actuators * Safety Applications

* Low Power Dissipation for Small Sensors

* 1.2Ω (typ) Driver On-Resistance

* 50mW (typ) Power Dissipation When Driving 100mA Load

* High Configurability and Integration Reduce SKUs

* Auxiliary 24V Digital Input

* Selectable Driver Current: 50mA to 250mA

* SPI or Pin-Control Interface for Configuration and Monitoring

* Multiplexed SPI/UART Interface Option

* 5V and 3.3V Linear Regulators

* Optional External Transistor Supports Higher Regulator Loads

* Integrated LED Drivers

* Pin and Software Compatible to MAX14827A

* Robust Communication

* 65V Absolute Maximum Ratings on Interface and Supply Pins Allows for Flexible TVS Protection

* Glitch Filters for Improved Burst Resilience and Noise

* Thermal Shutdown

* Hot-Plug Supply Protection

* Reverse Polarity Protection of All Sensor Interface Inputs/Outputs

* -40°C to +125°C Operating Temperature Range