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AN3857

Social Distancing with UHF and UWB Devices Application

Note

Introduction

This application note describes a Social Distancing (SD) application to measure and track distances between SD

devices (up to five) using Microchip's UHF and UWB technologies. These technologies offer low-power solutions for

longer battery life. The purpose of this application is to raise an alarm if the distance falls below a threshold value for

a predefined time.

Features

•ATA8510 UHF Transceiver for Communication to Other Devices at 433 MHz or 868 MHz

•ATA8350 Ultra-Wide-Band (UWB) Transceiver for Distance Measurement at 7 GHz

•AIS2DW12 Motion Sensor for Movement Detection

•ATtiny3217 Host MCU for Application Control

•Supports Tracking Up to Four Other Devices within 3m x 3m Area

•Generates an Alarm by LED Flashing and Buzzer when the Distance Between Two Devices is Less than 1.5m

or 2m for More than 5 Seconds

•Optional Saving of Contact IDs in Serial Flash Device (SST25PF040C)

•Operates with a LIR2540 or CR2540 Coin Cell Battery for More than a Week

•Optional USB Li-Ion Charger (MIC79110) for Li-Ion or Li-Po Accumulator with 3V Regulator (MIC5306) instead

of Coin Cell

MICROCHIP CONFIDENTIAL

FOR RELEASE ONLY UNDER NON-DISCLOSURE

AGREEMENT (NDA)

© 2021 Microchip Technology Inc. Application NoteDS00003857A-page 1

Product specificaties