AS3931

www.DataSheet4U.com 3D Low Power Wake-up Receiver AS3931 1. General Description AS3931 is an ultra low power, three channel LF ASK receiver designed to operate in various applications such as LF identification systems and LF tag receivers. AS3931 is able to detect a low frequency ASKmodulated signal by looking for a digital wake-up pattern and generates a WAKE signal after successful pattern detection. The device incorporates an intelligent pattern detection algorithm that provides reliable operation even in presence of strong interferences. RSSI signals can be generated at the RSSI pin for each receiver channel. PRODUCT BRIEF 4. Additional Features Antenna rotation switch three independent LF receiver chains Wake-up output combining the three receiver chains Low power 32.768 kHz crystal oscillator circuit Serial programming interface Voltage regulator with 2.4 V output, on/off switchable 2. Key Features - 3D wake-up pattern detection 3D LF field strength measurement Antenna rotation for easy calibration High sensitivity and high dynamic range Wide operating frequency range Reliable, interference resistant wake-up decoding Highly protected differential inputs Ultra low power consumption Each independent LF receiver chain contains: - Input overload protection - Input attenuator - Ultra low power LF amplifier with logarithmic envelope output - Robust data detector with adaptive slicing threshold that translates the logarithmic envelope into a digital data signal - Error ...