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 creates industrial sensors to cloud nodes, connects to IoT network gateways and cloud data providers. The reference design uses micropower op amps, comparators and SimpleLinkTM Ultra-low power consumption less than 1GHz wireless microcontroller (MCU) platform to form ultra-low power sensor - cloud motion detector with long battery life and no connection. Connection length up to 1000 meters, meet IEEE 802.15 The .4e/g standard is mainly used in motion detection, lighting sensors, wireless control and building automation. This article introduces the main features and system specifications of the reference design TIDA-01476, block diagram, circuit diagram, bill of materials and PCB design.

The TIDA-01476 reference design demonstrates howto create an industrial sensor-to-cloud end nodecapable of connecting to an IoT network gateway andcloud data provider. This design uses Texas Instruments 'nano-power operational amplifiers,comparators, and the SimpleLinkTM ultra-low- powerSub-1 GHz wireless microcontroller (MCU) platform todemonstrate an ultra-low-power sensor-to-cloudmotion detector, leading to extremely long battery lifeand no required wiring.

This 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 Texas Instruments' nano-power operational amplifiers, comparators, and the SimpleLinkTM ultra-low -power Sub-1 GHz wireless microcontroller (MCU) platform to demonstrate an ultra-low-power sensor-to-cloud motion detector, leading to extremely long battery life and no required wiring.

Many industrial and building automation systems use motion detectors to control different functions based on human presence, such as lighting, for achieving higher efficiency of those functions by turning them offwhen not needed. Additionally, these systems require increased numbers of wireless sensor nodes toreduce the installation costs And the make the systems more flexible for future expansion by eliminationwiring. However, one of the major limitations for a large wireless network is power. Because these systemss are battery powered, the maintenance cost associated with periodic battery replacement can become prohibited. Consumption and battery configuration, typical batterypoweredPIR motion detectors can run anywhere from four to seven years before the batteries need to bereplaced.

Enabled by Texas Instruments 'nano-power amplifiers, comparators, and the SimpleLink ultra-low-powerwireless MCU platform, the Low-Power Wireless PIR Motion Detector Reference Design demonstrates amotion detector circuit solution requiring no wiring while also fully maximizing the battery life.

At a high level, this TI Design consists of a CR2032 coin cell battery, two nano-power op amps, two nanopowercomparators, an ultra-low-power wireless MCU, and a PIR sensor with analog signal output. The two op amps form an amplified The two comparators form a window comparator, whichis used to compare the amplified sensor output to fixed reference thresholds so that motion can bedistinguished from The two outputs of the window comparator then serve as interrupts to the wireless MCU. This way, the MCU can operate in its lowest power sleep mode during times where there is is motion being detected and only wakes up to send messages back to a remote Host when motion hasbeen detected. Due to the nano-amp operation of the analog signal chain components, this TI Designachieves a 10-year battery life from a single CR2032 coin cell battery.

This design guide addresses component selection, design theory, software and the testing results of this TI Design system. The scope of this design guide gives system designers a head-start in integration TI'snano-power analog components, and the SimpleLink ultra-low- Power wireless MCU platform along with astarting point for sensor-to-cloud software integration.

Reference design TIDA-01476 main features:

• Large Network-to-Cloud Connectivity EnablingLong Range, Up to 1 km (Line of Sight)
• IEEE 802.15.4e/g Standards-Based Sub-1 GHz Solution With TI 15.4-Stack
• Use of Nano-Power Analog for Ultra-Low-PowerDesign, Resulting in 10-Year Battery Life FromSingle CR2032 Coin Cell
• Low Standby Current of 1.65 μA (PIR SensorRemains Active in Standby)
• Interrupt Driven Sub-1 GHz WirelessCommunication of Motion for Increased Power Savings
• Motion Sensitivity up to 30 ft

Reference Design TIDA-01476 Application:

• Motion Detection
• Lighting Sensors
• Wireless Controls
• Building Automation

Figure 1. Reference Design TIDA-01476 Outline Drawing Reference Design TIDA-01476 Main System Specifications:

Figure 2. Block diagram of the wireless PIR system

Figure 3. Low-power wireless PIR motion detector reference device hardware description

Figure 4. Reference Design TIDA-01476 Circuit Diagram (1)

Figure 5. Reference Design TIDA-01476 Circuit Diagram (2)

Figure 6. Reference Design TIDA-01476 Circuit Diagram (3)
Refer to the design TIDA-01476 material list:

Figure 7. Reference Design TIDA-01476 PCB Diagram

Figure 8. Reference Design TIDA-01476 PCB Design Drawing (1)

Figure 9. Reference Design TIDA-01476 PCB Design Drawing (2)

Figure 10. Reference Design TIDA-01476 PCB Design Drawing (3)

Figure 11. Reference Design TIDA-01476 PCB Design Drawing (4)

Figure 12. Reference Design TIDA-01476 PCB Design Drawing (5)

Figure 13. Reference Design TIDA-01476 PCB Design Drawing (6)

Figure 14. Reference Design TIDA-01476 PCB Design Drawing (7)

Figure 15. Reference Design TIDA-01476 PCB Design Drawing (8)
For details, please see:

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Tiduda8.pdf
Tidrs11.pdf
Tidrs12.pdf

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