Low noise PIR signal chain reference design with less false alarm for line powered motion detector
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Key Document


This reference design demonstrates how to design a low noise analog signal chain for PIR-based motion detection subsystems in line-powered applications resulting in longer detection range. This reference designs offers design theory, component selection, and circuit simulations for noise, settling time, stability and frequency response. Circuit modifications that help to meet design goals, such as faster power-on settling time and reduced false trigger due to some environmental sources in indoor and outdoor conditions, are also discussed.

  • Faster power-on settling time < 25 sec
  • Reduced false trigger: Fifth order roll-off at lower cut-off and forth order roll-off at higher cut-off
  • Circuit bandwidth: 0.3 Hz to 6.5 Hz
  • Referred to output noise < 26.4 mV peak-peak
  • Phase margin > 72º for all amplifier stages

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TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TLV9064  4-Channel, 10-MHz, low-noise, RRIO, CMOS op amp for cost-sensitive systems  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
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User guides (1)
Title Type Size (KB) Date
PDF 2851 19 Nov 2018
Design files (2)
Title Type Size (KB) Date
PDF 96 19 Nov 2018
PDF 18 19 Nov 2018
Related Tools & Software

Development Tools (1)

Name Part Number Tool Type
SPICE-based analog simulation program  TINA-TI  Circuit Design & Simulation 

Models (1)

Title Category Type Size (KB) Date Views
TIDA-010027 Simulation Files TINA-TI Reference Design ZIP 115 KB 19 Nov 2018

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