AS3935-BQFT

AS3935-BQFT Datasheet


Datasheet AS3935 Franklin Lightning Sensor IC

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AS3935-BQFT AS3935-BQFT AS3935-BQFT (pdf)
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Datasheet AS3935 Franklin Lightning Sensor IC

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Datasheet

AS3935

Franklin Lightning Sensor IC
1 General Description

The AS3935 is a programmable fully integrated Lightning Sensor IC that detects the presence and approach of potentially hazardous lightning activity in the vicinity and provides an estimation on the distance to the head of the storm. The embedded lightning algorithm checks the incoming signal pattern to reject the potential man-made disturbers.

The AS3935 can also provide information on the noise level and inform the external unit e.g. microcontroller in case of high noise conditions, with the noise floor generator and noise floor evaluation blocks.

The AS3935 can be programmed via a 4-wire standard SPI or an Also, in case the latter is chosen, it is possible to choose among four different addresses. Two clocks are internally generated by two different RC-Oscillators TRCO and SRCO. An automatic procedure can increase the precision of those oscillators. The AS3935 can be either supplied by an internal voltage regulator or directly by VDD.
2 Key Features
sensor warns of lightning storm activity within a radius of 40km

Figure AS3935 Block Diagram

I2CL/

I2CD/

CS SCL MISO MOSI SINT
estimation to the head of the storm down to 1km in 14 steps
both cloud-to-ground and intra-cloud-to-cloud flashes
man-made disturber rejection algorithm detection levels enable threshold setting for
optimal controls and interface is used for control and register reading Tuning to compensate variations of the external
components voltage range 2.4V to 5.5V listening, and active mode 16LD MLPQ 4x4mm
3 Applications

AS3935 is ideal for Weather Stations, Clocks, Sports Equipment, Portables, Pool Safety, Uninterruptible Power Supply UPS , Global Positioning System GPS , Cellular phones, Watches, and Golf Equipment.

ADD0 ADD1 VDD VREG EN_VREG

Register

POR INP

AFE INN

Voltage

I2C_ADD

Regulator

Noise Floor Level

Generation

Noise Floor Evaluation

ACG TEST

LC-Oscillator

Watchdog

Signal Validation

Calibration

AS3935

Energy Calculation

TRCO SRCO Clock Generators
Register Table 11 Register Table Description and Default 12 Serial Peripheral Interface 14 SPI Command 14 Writing of Register 15 Reading of Data from Addressable Registers READ Mode 15 Send Direct Command Byte 16 Byte Write 17 Register Read 18 Direct 18 Voltage Regulator 18 Analog Front-end AFE and Watchdog 19 Noise Floor Generator and Evaluation 20 Lightning Algorithm 20 Signal Validation 20 Energy 21 Statistical Distance 21 Interrupt Management 22 Antenna Tuning 23 Clock Generation 23 9 Package Drawings and Markings 24 10 Ordering 26
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AS3935

Datasheet - Pin Assignments
4 Pin Assignments

Figure Pin Assignments Top View

ADD1 ADD0 NC I2CD / MOSI

ACG 1
12 MISO

INN 2 INP 3 GND 4

AS3935

Exposed pad
11 I2CL / SCL 10 IRQ 9 SI

VDD VREG EN_VREG

Pin Descriptions

Table Pin Descriptions

Pin Number 1 2 3 4 5 6 7 8 9 10

Pin Name ACG INN INP GND VDD VREG

EN_VREG CS SI IRQ

I2CL/SCL

MISO

I2CD/MOSI

ADD0

ADD1

Exposed pad

Pin Type Analog I/O

Supply pad

Digital input Digital output Digital input Digital output Digital I/O with pull-up / Digital input

Digital input Supply pad

Description AC-Ground Antenna ground Antenna positive input

Ground Positive supply voltage Positive supply voltage / Regulated voltage Regulator Enable Chip Select active low Select Interface GND SPI or VDD

Interrupt clock bus or SPI clock bus
according to SI setting SPI data output bus
data bus or SPI data input bus according to SI setting Not connected address selection LSB
address selection MSB Connect to Ground via the GND plan and pin 4
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AS3935

Datasheet - Absolute Maximum Ratings
5 Absolute Maximum Ratings

Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Electrical Characteristics on page 5 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Table Absolute Maximum Ratings
Datasheet - Ordering Information
10 Ordering Information
Table Ordering Information Ordering Code AS3935-BQFT

Package Type MLPQ 4x4 16LD

Marking AS3935

Delivery Form 7 inches Tape & Reel

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Quantity 1000 pcs
26 - 27

AS3935

Datasheet - Copyrights

Copyrights

Copyright 1997-2012, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies.

Disclaimer

Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.

This product is intended to be used as an early warning indicator for lightning related storms. It does not guarantee accuracy or predict exact strike locations. By using the part, the user shall be aware that s/he cannot just rely on the indication in order to prevent accidents caused by lightning strikes. austriamicrosystems explicitly states that the user must follow the generally known and recommended instructions on how to behave in the event of lightning strikes. In no event shall austriamicrosystems or its suppliers be liable for any direct, indirect, incidental, special, exemplary or consequential damages including, but not limited to procurement of substitute goods or services, loss of use, data or profits, or business interruption arising out of user’s disregard to such warnings and instructions.

Contact Information

Headquarters
austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria

Tel +43 0 3136 500 0 Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
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Datasheet ID: AS3935-BQFT 519729