- TI introduced a reference design based on a battery-powered motion sensor modules for low-power applications
- This design uses TI’s nano-power operational amplifiers, comparators, and a SimpleLink low-power Sub-1 GHz wireless microcontroller (MCU) platform
Many industrial and building automation systems use motion detectors to control different functions based on human presence such as lighting and security systems. It is used for achieving higher efficiency of those functions by turning them off when not needed.
Additionally, these systems requires an increased number of wireless sensor nodes. These nodes are required to reduce the installation costs and making the systems more flexible for future expansions. It also eliminates wiring.
Major limitations include wiring costs and expandability
However, one of the major limitations for a large wireless network is power. Because these
systems are battery powered, the maintenance cost associated with periodic battery replacement can be costlier. Depending on the power consumption and battery configuration, typical battery-powered PIR motion detectors can last for years in a single battery.
An industrial sensor-to-cloud end node solution
Texas Instruments has introduced a reference design based on a battery-powered motion sensor module. The TIDA-01476 reference design demonstrates how to create an industrial sensor-to-cloud end node capable of connecting to an IoT network gateway and cloud data provider.
This design uses TI’s nano-power operational amplifiers, comparators, and a SimpleLink low-power Sub-1 GHz wireless microcontroller (MCU) platform. All these components constitute for a design of low-power sensor-to-cloud motion detector. This low power design can lead to longer battery life with wire-free designs.
Large network-to-cloud connectivity
The design feature a large Network-to-Cloud Connectivity. It enables a long coverage range
of up to 1 km. The device works on IEEE 802.15.4e/g Standards. The design develops a Sub-1 GHz Solution which supports TI 15.4-Stack. The motion sensor can sense for a range of up to 30 feet. It contributes towards a higher device sensitivity.
Can extend battery life up to ten years
It uses a nano-power analogue amplifier for the development of low-power design. This result in an extended battery life of up to 10 years. Also, this device is driven on a single CR2032 Coin Cell.
The design features a low standby current up to 1.65 μA. The controller has a unique feature embedded in the device. Unlike, other low-power sensors, the PIR Sensor
works in the active state even if the device goes in standby mode.
Standby currents of up to 2.6 microampere
The design works on an operating voltage of 3V. The average standby current consumption of the design is up to 2.6 micro-ampere. The device senses continuously for an inactive state of 60 seconds. When this event occurs, the device goes to sleep mode. The device works over a temperature between –30°C to 60°C. Also, the design is packaged in a dimension of 35mm × 75mm.
This design can help in improving and developing low-cost solutions in developing applications related to motion detection, lighting sensors, wireless controls and building automation. All the design files related to this reference design can be found here.