{"id":3859,"date":"2026-03-30T19:30:00","date_gmt":"2026-03-30T19:30:00","guid":{"rendered":"https:\/\/pirhome.com\/?p=3821"},"modified":"2026-03-30T19:30:00","modified_gmt":"2026-03-30T19:30:00","slug":"silicon-labs-wifi6-pir-soc-2026","status":"publish","type":"post","link":"https:\/\/www.pirhome.com\/?p=3859","title":{"rendered":"Silicon Labs Launches Wi-Fi 6 SoC with Integrated PIR Support"},"content":{"rendered":"<h2>March 28, 2026 \u2013 Austin, TX \u2013 Silicon Labs Streamlines Wireless PIR Design<\/h2>\n<p>Silicon Labs has announced the SiWx917-PIR, a new system-on-chip (SoC) that integrates a Wi-Fi 6 radio, Bluetooth LE, and a dedicated analog front-end for PIR sensors into a single package. The device is designed to simplify the development of wireless motion sensors, reducing component count and PCB area by up to 70% compared to discrete designs.<\/p>\n<p>The SiWx917-PIR is available now for sampling, with volume production expected in Q4 2026.<\/p>\n<h2>Technical Specifications<\/h2>\n<ul>\n<li><strong>Processor:<\/strong> ARM Cortex-M33 (200 MHz) with TrustZone security<\/li>\n<li><strong>Radio:<\/strong> Wi-Fi 6 (802.11ax) + Bluetooth LE 5.4<\/li>\n<li><strong>PIR analog front-end:<\/strong> Dual-channel programmable gain amplifier (40-80 dB)<\/li>\n<li><strong>ADC:<\/strong> 16-bit sigma-delta with 1 \u00b5V resolution<\/li>\n<li><strong>On-chip DSP:<\/strong> Motion detection, classification, and timing<\/li>\n<li><strong>Power consumption:<\/strong> 5 \u00b5A in sleep (PIR monitoring), 50 \u00b5A in Wi-Fi standby<\/li>\n<li><strong>Package:<\/strong> 6mm \u00d7 6mm QFN (56-pin)<\/li>\n<li><strong>Price:<\/strong> $2.99 (10,000-unit quantities)<\/li>\n<\/ul>\n<h2>Key Innovations<\/h2>\n<h3>Integrated PIR Analog Front-End<\/h3>\n<p>The SiWx917-PIR includes a complete analog signal chain for PIR sensors:<\/p>\n<ul>\n<li>Dual-channel programmable gain amplifier (40-80 dB gain)<\/li>\n<li>Programmable high-pass and low-pass filters (0.1 Hz to 100 Hz)<\/li>\n<li>16-bit ADC with differential inputs<\/li>\n<li>Automatic offset cancellation<\/li>\n<li>Built-in voltage reference and bias generation<\/li>\n<\/ul>\n<p>This integration eliminates the need for external op-amps, comparators, and passive components, reducing BOM cost and simplifying PCB layout.<\/p>\n<h3>On-Chip Motion Processing<\/h3>\n<p>The SoC includes dedicated hardware for motion detection:<\/p>\n<ul>\n<li>Programmable threshold detection with hysteresis<\/li>\n<li>Direction detection for dual-element sensors<\/li>\n<li>Configurable hold time (0.1s to 30 minutes)<\/li>\n<li>Block time configuration (0s to 10 seconds)<\/li>\n<li>Wake-on-motion interrupt for ultra-low power operation<\/li>\n<\/ul>\n<h3>Machine Learning Accelerator<\/h3>\n<p>The SiWx917-PIR includes a dedicated neural network accelerator (20 GOPS) that can run classification models locally. Silicon Labs provides pre-trained models for:<\/p>\n<ul>\n<li>Human vs. pet discrimination<\/li>\n<li>Vehicle detection<\/li>\n<li>Environmental noise rejection<\/li>\n<li>Activity classification (walking, running, sitting)<\/li>\n<\/ul>\n<h3>Wi-Fi 6 Connectivity<\/h3>\n<p>The integrated Wi-Fi 6 radio supports:<\/p>\n<ul>\n<li>2.4 GHz and 5 GHz bands<\/li>\n<li>OFDMA for efficient multi-device communication<\/li>\n<li>Target Wake Time (TWT) for extended battery life<\/li>\n<li>WPA3 security<\/li>\n<\/ul>\n<h2>Power Management<\/h2>\n<p>The SiWx917-PIR is optimized for battery-powered operation:<\/p>\n<ul>\n<li><strong>Sleep mode (PIR only):<\/strong> 5 \u00b5A<\/li>\n<li><strong>Wi-Fi standby (TWT):<\/strong> 50 \u00b5A<\/li>\n<li><strong>Wi-Fi active (100 ms transmit):<\/strong> 150 mA peak<\/li>\n<li><strong>PIR inference (neural network):<\/strong> 15 mA for 20 ms<\/li>\n<li><strong>Supply voltage:<\/strong> 1.8V to 3.6V<\/li>\n<\/ul>\n<p>With typical usage (50 motion events\/day, 1 Wi-Fi transmission per event), average current is approximately 10 \u00b5A, enabling 5+ year battery life from a CR2032 coin cell.<\/p>\n<h2>Development Tools<\/h2>\n<p>Silicon Labs offers a comprehensive development ecosystem:<\/p>\n<ul>\n<li><strong>SiWx917-PIR-EVB:<\/strong> Evaluation board with pre-mounted PIR sensor and lens ($79)<\/li>\n<li><strong>Simplicity Studio:<\/strong> IDE with PIR examples and configuration tools<\/li>\n<li><strong>Mobile App:<\/strong> iOS\/Android app for configuration and testing<\/li>\n<li><strong>Cloud Integration:<\/strong> Reference code for AWS IoT, Azure IoT, and Google Cloud<\/li>\n<\/ul>\n<h2>Target Applications<\/h2>\n<ul>\n<li>Wireless security sensors (direct to cloud via Wi-Fi)<\/li>\n<li>Smart home motion detectors<\/li>\n<li>Building automation occupancy sensors<\/li>\n<li>IoT-enabled lighting controls<\/li>\n<li>Elderly care monitoring systems<\/li>\n<\/ul>\n<h2>Industry Reaction<\/h2>\n<p>&#8220;The SiWx917-PIR represents a significant step forward in sensor integration,&#8221; said a smart home industry analyst. &#8220;By combining the PIR analog front-end, processing, and Wi-Fi connectivity on a single chip, Silicon Labs has made it dramatically easier to create battery-powered motion sensors that connect directly to the cloud. This will accelerate the proliferation of wireless motion sensing.&#8221;<\/p>\n<h2>Conclusion<\/h2>\n<p>Silicon Labs&#8217; SiWx917-PIR demonstrates the trend toward increased integration in sensor design. By combining PIR signal conditioning, processing, and wireless connectivity in a single package, the SoC enables new classes of battery-powered, cloud-connected motion sensors.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>March 28, 2026 \u2013 Austin, TX \u2013 Silicon Labs Streamlines Wireless PIR Design Silicon Labs has announced the SiWx917-PIR, a new system-on-chip (SoC) that integrates a Wi-Fi 6 radio, Bluetooth LE, and a dedicated analog front-end for PIR sensors into a single package. The device is designed to simplify the development of wireless motion sensors, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3859","post","type-post","status-publish","format-standard","hentry","category-news"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\r\n<title>Silicon Labs Launches Wi-Fi 6 SoC with Integrated PIR Support - PIRHOME<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/www.pirhome.com\/?p=3859\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"Silicon Labs Launches Wi-Fi 6 SoC with Integrated PIR Support - PIRHOME\" \/>\r\n<meta property=\"og:description\" content=\"March 28, 2026 \u2013 Austin, TX \u2013 Silicon Labs Streamlines Wireless PIR Design Silicon Labs has announced the SiWx917-PIR, a new system-on-chip (SoC) that integrates a Wi-Fi 6 radio, Bluetooth LE, and a dedicated analog front-end for PIR sensors into a single package. 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