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Design of Ultra-Low Power Circuits for Battery-Powered Wireless PIR Motion Detec (Rev. A)

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In this document, a cost-optimized, ultra-low power op amp interface for wireless battery operated PIR (Passive Infrared) motion detectors is described. A single new 4-channel nanopower operational amplifier, TLV8544, implements the analog signal path, including two gain stages, two bandpass filters, and a window comparator.