The AS3932 is a 3-channel low power ASK receiver that is able to generate a wake-up upon detection of a data signal which uses a LF carrier frequency between 110 – 150 kHz.
The integrated correlator can be used for detection of a programmable 16-bit wake-up pattern. The device can operate using one, two, or three active channels.
The AS3932 provides a digital RSSI value for each active channel, it supports a programmable data rate. The AS3932 offers a real-time clock (RTC), which is either derived from a crystal oscillator or the internal RC oscillator. The programmable features of AS3932 enable to optimize its settings for achieving a longer distance while retaining a reliable wake-up generation.
The sensitivity level of AS3932 can be adjusted in presence of a strong field or in noisy environments.
The AS3932 demo board demonstrates the main features of the AS3932. These include 3D wake-up pattern detection, readout of false wake-ups, possibility to measure current consumption in different operating modes, and measurement access to SPI communication and data output. The influence different settings have on the detection efficiency can be observed right away by using the 125 kHz wake-up transmitter board.
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