AS3931 Overview
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...
AS3931 Key Features
- 3D wake-up pattern detection 3D LF field strength measurement Antenna rotation for easy calibration High sensitivity and
- 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 tolerant digital pattern correlator that detects a given code sequence in the received data signal and generates a
- 150 kHz Data rate: 2.731 kb/s Current consumption in standby mode: 6.6 µA Dynamic range: 60 dB RSSI step: ( ∆ V RSSI @ 1
AS3931 Applications
- 3D wake-up pattern detection 3D LF field strength measurement Antenna rotation for easy calibration High sensitivity and high dynamic range Wide operating frequ
- Input overload protection