A system adapted to interface an LC sensor , the system comprising: - means (206, 222, GND; 220, 222, VDD / 2 , GND ; 242, 244, 246; 220, 222, C1, VDD , GND ; 220, VDD , GND ; 240, GND) configured to selectively start an oscillation of said LC sensor ; - an analog peak detector connectable to said LC sensor and configured to determine a signal ( V peak ) being indicative of a peak voltage of the oscillation of said LC sensor ; and - detection means configured to determine the state of said LC sensor as a function of said signal ( V peak ) determined by said analog peak detector ; characterized in that said detection means comprise an analog-to-digital converter and a digital processing unit ; wherein said peak detector comprises a diode (D) and a storage capacitor (C), wherein the anode of said diode (D) is connectable to said LC sensor and the cathode of said diode (D) is connected to a first terminal of said storage capacitor (C), and wherein the second terminal of said storage capacitor (C) is connected to ground (GND), and wherein said peak detector has associated at least one switch (S1) to selectively discharge said at least one storage capacitor (C); and wherein the system is configured for: - discharging said storage capacitor (C) and said LC sensor , - driving (6002; 7004) said means (206, 222, GND; 220, 222, VDD /2, GND ; 242, 244, 246; 220, 222, C1, VDD, GND ; 220, VDD, GND ; 240, GND) configured to selectively start an oscillation of said LC sensor , thereby starting the oscillation of said LC sensor , - waiting for a given period of time, corresponding at least to one fourth of an oscillation period of said LC sensor , whereby said peak detector determines the peak voltage of the oscillation of said LC sensor , - activating said analog-to-digital converter once said peak detector has determined the peak voltage of the oscillation of said LC sensor , - measuring (6008; 7010) by means of said analog-to-digital converter said signal ( V peak ) being indicative of a peak voltage of the oscillation of said LC sensor from said analog peak detector , - detecting by means of said detection means the state of said LC sensor as a function of said measured signal ( V peak ) being indicative of a peak voltage of the oscillation of said LC sensor , and - deactivating said analog-to-digital converter . - means (206, 222, GND; 220, 222, VDD / 2 , GND ; 242, 244, 246; 220, 222, C1, VDD , GND ; 220, VDD , GND ; 240, GND) configured to selectively start an oscillation of said LC sensor ; - an analog peak detector connectable to said LC sensor and configured to determine a signal ( V peak ) being indicative of a peak voltage of the oscillation of said LC sensor ; and - detection means configured to determine the state of said LC sensor as a function of said signal ( V peak ) determined by said analog peak detector ; - discharging said storage capacitor (C) and said LC sensor , - driving (6002; 7004) said means (206, 222, GND; 220, 222, VDD /2, GND ; 242, 244, 246; 220, 222, C1, VDD, GND ; 220, VDD, GND ; 240, GND) configured to selectively start an oscillation of said LC sensor , thereby starting the oscillation of said LC sensor , - waiting for a given period of time, corresponding at least to one fourth of an oscillation period of said LC sensor , whereby said peak detector determines the peak voltage of the oscillation of said LC sensor , - activating said analog-to-digital converter once said peak detector has determined the peak voltage of the oscillation of said LC sensor , - measuring (6008; 7010) by means of said analog-to-digital converter said signal ( V peak ) being indicative of a peak voltage of the oscillation of said LC sensor from said analog peak detector , - detecting by means of said detection means the state of said LC sensor as a function of said measured signal ( V peak ) being indicative of a peak voltage of the oscillation of said LC sensor , and - deactivating said analog-to-digital converter . <EOS>