Motion-control chip targets precision robots

With its high-speed inputs and a precise micro-stepping algorithm, STMicroelectronics’ STSPIN820 IC can turn a motor by a fraction of a degree to move a 3D printer’s head at a speed of more than 500mm/s, with submicron precision.

The chip can also be used to control extremely precise movements like sample loading, capping/decapping, and storage/retrieval in next-generation clinical automation systems or other motor-driven medical equipment. Delivered in a 4x4mm QFN package and containing both the control intelligence and fully protected power components (rated 45V and 500mΩ R DS(ON)) for driving the motor, the chip is what ST claims to be the world’s smallest all-in-one high-precision controller. Manufacturers of automation equipment can simply place the device on the controller circuit board, with minimal extra parts needed to complete the system, to save space and enhance system reliability.