Maxim Integrated MAXREFDES27# and MAXREFDES36# reference designs

Subsystem reference designs from Maxim Integrated provide accurate, low-power optical proximity sensing and enhance distributed control with a compact digital-input hub. The subsystems integrate the IO-Link standard for industrial applications.

The MAXREFDES27# IO-Link subsystem reference design lets operators tune and calibrate an optical proximity sensor with up to 14-bit resolution. Integrated DC-DC low-power conversion increases system efficiency. The design is tunable and can be calibrated for different surfaces and light levels.

The board integrates the DC-DC converter, an IO-Link transceiver, the proximity sensor and a Renesas RL78 microcontroller. The robust IO-Link performance provides self-configuration, efficient two-way communication between sensor and control module and several protection mechanisms. The product fits on an 8.2 x 31.5 mm PCB and consumes 150 mW.

The MAXREFDES36# IO-Link subsystem merges 16 digital inputs into its hub and eliminates 15 cables connected to the PLC. It consumes 235 mW of power and fits in a standard DIN rail PCB holder. The digital hub lets manufacturers fit more digital inputs into each system controller.

The product features a DC-DC power converter, two 8-channel digital-input serialisers, an IO-Link transceiver and a Renesas RL78 microcontroller on one board. Robust IO-link performance provides self-configuration, short-circuit and shutdown protection, thermal warnings and drive capability.