The MLX90711 is a capacitive position/movement sensing auto‑shutoff sensor with low‑cost package options and configurable timing for safety applications.
The MLX90711 provides safety shut‑off based on movement or position detection using a patented capacitive sensor. A small conductive ball moves between copper tracks on the PCB, changing capacitance and allowing the ASIC to determine the sensor's position (up, down, horizontal) or movement.
The device is offered in PDIP‑8 or SOP‑8 packages, supports multiple timing options for relay drive, and includes built‑in LED indication. Electrical specifications such as supply range, clock period, and relay driver parameters are listed, and application examples show typical wiring for irons and fryers.
| Power supply range VDD1 | 60 V – 70 V |
|---|---|
| Clock period Tcl | 48.9 µs |
| Leakage current Irdlk (relay driver) | 10 µA |
| Relay driver on‑resistance Rrdon | 90 Ω at 30 mA |
| LED driver leakage current Iledlk | 10 µA |
| LED driver on‑resistance Rledon | 50 Ω at 30 mA |
| Auto shut‑off timing tolerance (DO) | ±15 % |
| Package types | PDIP‑8 or SOP‑8 |
It uses a patented capacitive detection where a small conductive ball moves between copper tracks, changing capacitance that the ASIC measures.
Four duty‑cycle options are provided: 14.4 %, 16 %, 28 % and 31 %.
Typical reset time is about 0.25 s when the coil is not activated and about 2.5 s when the coil is activated.