AS3935 − General Description BenefitsFeatures• SPI and I²C compatible interface is used for control and register reading. A 10k pullup resistor is • Flexibility with industry standard interfaces included on chip on the I2CD line. An external pullup resistor is required on I2CL in I²C compatible mode. • Antenna tuning to compensate variations of the • Ensures optimal receive performance external components • Supply voltage range 2.4V to 5.5V when using on • Flexible supply range chip Vreg otherwise 2.4 to 3.6V • Configurability of power modes • Power-down, listening, and active mode • Temperature range • -40°C to 85°C • Very small package size • Package: 16LD MLPQ (4x4mm) Applications AS3935 is ideal for: • Consumer Weather Stations • Clocks • Sports Equipment • Portables • Global Positioning System (GPS) Page 2ams Datasheet Document Feedback [v1-04] 2016-Jan-13 Document Outline ScioSense_Cover_page AS3935 Data Sheet General Description Key Benefits & Features Applications Block Diagram Pin Assignments Absolute Maximum Ratings Electrical Characteristics Operating Conditions DC/AC Characteristics for Digital Inputs and Outputs Detailed System and Block Specification Typical Operating Characteristics Detailed Description Circuit Operating Modes Power-Down Mode Listening Mode Signal Verification System and Block Specification Register Table Register Table Description and Default Value Serial Peripheral Interface (SPI) SPI Command Structure Writing of Register Data Reading of Data from Addressable Registers (READ Mode) Send Direct Command Byte I²C Guideline for Pull Up Resistors on I2CL and I2CD I²C Byte Write I²C Register Read Direct Command Voltage Regulator Analog Front-End (AFE) and Watchdog Noise Floor Level Measurement and Evaluation Lightning Algorithm Signal Validation Energy Calculation Statistical Distance Estimation Interrupt Management Antenna Tuning Clock Generation Noise Sources to Be Avoided Package Drawings & Markings Ordering & Contact Information RoHS Compliant & ams Green Statement Copyrights & Disclaimer Document Status Revision Information Content Guide
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