SGM8139

The SGM8139 is a low voltage low power analog front end designed for PIR and vibration sensors. This part integrates two high input impedance operational amplifiers, window comparator, state control logic, a delay timer, a latch timer, a voltage reference and high current output stages. It can be used in various sensors, delay controllers as well as wake-up circuit in low power consumption systems.

Many industrial and building automation systems use motion detectors to control different functions based on human presence. Using SGM8139 with proper PIR sensor, it is easy to build a compact passive infrared detection system. The output stage of SGM8139 can easily drive different types of lights, buzzers, automatic doors, fans and white goods with programmable timers.

It is especially suitable for office buildings, hotels, shopping malls or automatic lighting and alarm systems, as well as intrusion detection. SGM8139 can be used for motion detection and room monitors in a smart home system as an ultra-low power wake-up block. SGM8139 can be used to condition the vibration sensor, providing a trigger signal to system.

SGM8139 is specifically designed to operate over a wide range of supply voltage from 1.4V to 5.5V. SGM8139 draws only 6μA supply current. It is ideal for applications powered by single cell or dual cell alkaline battery.

With two operational amplifiers, window comparators, and delay/lockout timers adjustable through external RCs, SGM8139 can both process the PIR output signal effectively and provide good anti-interference performance.

The SGM8139 is specified for the -40℃ to +85℃ industrial temperature range. The SGM8139 is available in Green SOIC-16 and TQFN-2.5×2.5-16L packages. The TQFN package makes it ideal for portable electronic products with area constrained PC boards.