Abstract: An interface device is disposed between an optoelectronic sensor and a load the impedance of which is lower than that of the sensor. The interface device comprises an impedance adaptation stage, comprising a distributed amplifier with a broad band of frequencies, the input of which is directly connected to a terminal of the sensor, and constitutes an impedance with an ohmic value which is greater than that of the load, and the output of which is connected to the load. The device additionally comprises a bootstrap which comprises a field-effect transistor mounted in a common drain, the gate of which is connected to a terminal of the sensor, and the source of which is connected to the other terminal of the sensor, via a capacitor with a selected value.