The MCP2030A is a stand-alone Analog Front-End (AFE) device for Low-Frequency (LF) sensing and bidirectional communication applications. The device has three low-frequency input channels. Each input channel can be individually enabled or disabled. The device can detect an input signal with amplitude as low as ~1 mVPP and can demodulate an amplitude-modulated input signal with as low as 8% modulation depth. The device can also transmit back the data using the same LF (LF-Talk back) carrier frequency. The MCP2030A can be used for various LF communications such as Passive Keyless Entry, Bodycom, and long range access control applications.