An energy-scavenging interface having a first input terminal and a second input terminal (25") connectable to a transducer which includes a storage element, and a first output terminal and a second output terminal (26") which is connectable to an electrical load (27, 28), wherein the first and second input terminals are configured to receive an electrical input signal (V TRANSD, V IN) having a first polarity and a second polarity of opposite sign with respect to one another, generated by the transducer, and the first and second output terminals are configured to supply to the electrical load an output signal (V OUT), the energy-scavenging interface comprising: - a first switch connected between the first input terminal and the second output terminal (26"); - a first current-conduction element, connected between the first input terminal and the first output terminal; and - a control logic configured for: driving, when the electrical input signal has the first polarity, the first switch in a closed state for a first time interval having at least one first temporal duration (T DELAY) proportional to the time constant (τ TRANSD) of the transducer, in which the storage element stores electrical energy, and until the electrical energy accumulated by the storage element reaches a first threshold value (I TH); and driving the first switch in an open state for a second time interval, having a second temporal duration (T CHARGE) and subsequent to the first time interval, in which the electrical load (27, 28) is supplied through the first current-conduction element by means of the electrical charge accumulated in the storage element, characterized in that the energy-scavenging interface further comprises a first electrical-signal detecting device configured for: - acquiring the electrical input signal when the electrical input signal has the first polarity; - acquiring a reference signal (V REF); - comparing the electrical input signal acquired with the reference signal; and - generating a control signal (V ctr_th1) when the energy accumulated by the storage element during the first time interval reaches said first threshold value (I TH). - a first switch connected between the first input terminal and the second output terminal (26"); - a first current-conduction element, connected between the first input terminal and the first output terminal; and - a control logic configured for: driving, when the electrical input signal has the first polarity, the first switch in a closed state for a first time interval having at least one first temporal duration (T DELAY) proportional to the time constant (τ TRANSD) of the transducer, in which the storage element stores electrical energy, and until the electrical energy accumulated by the storage element reaches a first threshold value (I TH); and driving the first switch in an open state for a second time interval, having a second temporal duration (T CHARGE) and subsequent to the first time interval, in which the electrical load (27, 28) is supplied through the first current-conduction element by means of the electrical charge accumulated in the storage element, driving, when the electrical input signal has the first polarity, the first switch in a closed state for a first time interval having at least one first temporal duration (T DELAY) proportional to the time constant (τ TRANSD) of the transducer, in which the storage element stores electrical energy, and until the electrical energy accumulated by the storage element reaches a first threshold value (I TH); and driving the first switch in an open state for a second time interval, having a second temporal duration (T CHARGE) and subsequent to the first time interval, in which the electrical load (27, 28) is supplied through the first current-conduction element by means of the electrical charge accumulated in the storage element, - acquiring the electrical input signal when the electrical input signal has the first polarity; - acquiring a reference signal (V REF); - comparing the electrical input signal acquired with the reference signal; and - generating a control signal (V ctr_th1) when the energy accumulated by the storage element during the first time interval reaches said first threshold value (I TH).