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Low Power Wireless PIR Motion Detection Reference Design--TIDA-01476 Solution
TI's TIDA-01476 is a low-power wireless PIR motion detection reference design that enables the creation of industrial sensor-to-cloud nodes. This solution connects to IoT network gateways and cloud data providers, offering a highly efficient and long-lasting wireless system. The design leverages micro-power operational amplifiers, comparators, and the SimpleLinkâ„¢ ultra-low-power sub-1 GHz wireless microcontroller (MCU) platform to deliver an ultra-low-power motion detector with extended battery life and no wiring required. With a communication range of up to 1,000 meters, it meets IEEE 802.15.4e/g standards and is ideal for applications such as motion detection, lighting sensors, wireless control, and building automation.
This reference design demonstrates how to build an industrial sensor-to-cloud end node capable of connecting to IoT gateways and cloud platforms. It utilizes Texas Instruments’ nano-power op amps, comparators, and the SimpleLink™ ultra-low-power Sub-1 GHz wireless MCU to create a power-efficient motion detection system. By using these components, the system achieves extremely long battery life—up to 10 years from a single CR2032 coin cell—and eliminates the need for wired connections.
Many industrial and building automation systems rely on motion detectors to manage functions like lighting based on human presence, improving energy efficiency by turning off systems when not in use. These systems often require a large number of wireless sensor nodes to reduce installation costs and enhance flexibility for future expansion. However, power consumption remains a key challenge, especially for battery-powered devices. Traditional PIR motion detectors typically last between four to seven years before requiring battery replacement. The TIDA-01476 design overcomes this limitation by using TI’s nano-power analog components and ultra-low-power wireless technology, significantly extending battery life and reducing maintenance efforts.
At a high level, the TIDA-01476 system includes a CR2032 coin cell battery, two nano-power op amps, two nano-power comparators, an ultra-low-power wireless MCU, and a PIR sensor with an analog output. The op amps amplify the sensor signal, while the comparators form a window comparator to distinguish motion from background noise. These outputs trigger interrupts to the MCU, allowing it to remain in a low-power sleep mode until motion is detected, at which point it wakes up to send a signal to a remote host. Due to the ultra-low current consumption of the analog components, the system can operate for up to 10 years on a single battery.
This design guide covers component selection, system theory, software implementation, and testing results, providing engineers with a solid foundation for integrating TI’s nano-power analog components and the SimpleLink™ wireless MCU into their own sensor-to-cloud applications. It serves as a starting point for both hardware and software development, helping designers streamline the integration process.
**Key Features of TIDA-01476:**
- Long-range connectivity with up to 1 km (line of sight)
- IEEE 802.15.4e/g compliant Sub-1 GHz solution
- Ultra-low-power design using nano-power analog components
- Up to 10-year battery life from a single CR2032 coin cell
- Low standby current of 1.65 μA
- Interrupt-driven wireless communication for motion detection
- Motion sensitivity up to 30 feet
**Applications:**
- Motion detection
- Lighting sensors
- Wireless controls
- Building automation
The TIDA-01476 reference design offers a comprehensive solution for developers looking to implement low-power, wireless motion detection systems. It includes detailed block diagrams, circuit schematics, BOMs, and PCB layout designs, making it easy to understand and implement. Additional documentation such as Tiduda8.pdf, Tidrs11.pdf, and Tidrs12.pdf provide further technical details for system integration and testing.