AS3935 Franklin Lightning Sensor™

Lighting Sensor IC with Embedded Algorithm.

The AS3935 Franklin Lightning Sensor™ IC is a programmable fully integrated lightning sensor that utilizes a sensitive RF receiver and

integrated proprietary algorithm to detect the presence and approach of lightning up to a distance of 24 miles.The sensor then provides for an estimation of the distance to the head of the storm. The AS3935 Lightning Sensor has a high degree of accuracy both cloud to ground and cloud to cloud. The Franklin Lightning Sensor is the world's 1st lightning sensing IC that was designed for low power, portable or fixed wire-line applications. It also has an automatic antenna tuning which increases sensitivity and it can distinguish between man-made signals such as motors and microwave ovens. Because of its low power consumption and small size, it is ideal for small, portable battery-operated devices. This advanced warning capability alerts users so that the necessary precautions can be taken to protect individuals and equipment from hazardous and deadly lightning strikes.

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Key Features

  • Detection of both cloud to ground and cloud to cloud lightning activity within a 40km range
  • Intelligent algorithm provides for false disturber rejection
  • Supply voltage range of 2.4-5.5V with power down, listening and active power modes
  • Antenna Auto Tuning
  • Small MLPW-16 (4x4mm) package

Key Benefits

  • Provides early warning beyond human senses & gives distance estimation to head of storm
  • Algorithm minimizes false indications
  • Selectable power modes make it suitable for low power portable devices
  • Antenna Auto tuning provides for optimal receive performance
  • Suitable for very small form factor applications

AS3935 Applications

  • Watches
  • Key Chains
  • Golf Carts
  • Pool Safety
  • Portable GPS
  • Bike Computers
  • Weather Stations
  • Sports Equipment
  • Uninterruptible Power Supply
  • Power Line Conditioners
  • Hi-Fi Electronics
  • Smart Grid Systems
  • Environmental Monitoring Systems

AS3935 Product Facts

Channels [#]
Wake-up sensitivity [µVpp]
LF carrier freq. range [kHz]
Data rate (manch.) [kb/s]
Dynamic range [dB]
RSSI step [dB]
PackageMLPQ-16 (4x4)
FeaturesDistance estimation up to 40 km in 14 steps,
embedded Disturber rejection algorithm & auto antenna tuning
Supply [V]2.4 - 5.5
Current Consumption [(PD/Listening/Active) µA]1 / 60 / 350
InterfaceSPI or I2C
Temperature Range [°C]-40 to +85


ADDITIONAL INFORMATION