A semiconductor physical quantity sensor device having a power source terminal for receiving a power source potential, a ground terminal for receiving a ground potential, and an output terminal. The semiconductor physical quantity sensor includes a sensor configured to generate a signal, an amplifier configured to amplify the signal, and to output the amplified signal through the output terminal, a first resistor electrically connected between the power source terminal and the amplifier, a second resistor electrically connected between the output terminal and the ground terminal, and a filter electrically connected between the power source terminal and the sensor, and including a third resistor and a capacitor.