The MAS6181 AM-Receiver chip is a highly sensitive, simple to use AM receiver specially intended to receive time signals in the frequency range from 40 kHz to 100 kHz. Only a few external components are required for time signal receiving. The circuit has preamplifier, wide range automatic gain control, demodulator and output comparator built in. The output signal can be processed directly by an additional digital circuitry to extract the data from the received signal. The control for AGC (automatic gain control) can be used to switch AGC on or off if necessary.
The MAS6181 supports receiving two different frequency signals by two selective crystal filters and an integrated switch to switch between two antenna frequencies. It has differential input for improved common mode disturbance rejection.
It’s also possible to use the MAS6181 in triple band applications.