End effector force measurement with digital drive circuit

An adapter assembly comprising:

• a tubular housing having a proximal end portion and a distal end portion;
• an actuation assembly including a trocar member;
• and
• a load sensing assembly disposed with the tubular housing, the load sensing assembly configured to measure a load exerted on the tubular housing, the load sensing assembly including:
• a sensor body including a pocket defined therein;
• a load sensor circuit disposed within the pocket and coupled to the sensor body;
• a signal processing circuit disposed within the pocket and electrically coupled to the load sensor circuit;
• and
• a cover disposed over the pocket and enclosing the load sensor circuit and the signal processing circuit therein, the cover being coupled to the sensor body thereby forming a first hermetic seal therebetween.

A surgical device including:

• a handle assembly including a controller;
• an adapter assembly including:
• a tubular housing having a proximal end portion configured to couple to the handle assembly and a distal end portion;
• and
• a load sensing assembly disposed with the tubular housing, the load sensing assembly configured to measure a load exerted on the tubular housing, the load sensing assembly including:
• a sensor body including a pocket defined therein;
• a load sensor circuit disposed within the pocket and coupled to the sensor body;
• a signal processing circuit disposed within the pocket and electrically coupled to the load sensor circuit;
• and
• a cover disposed over the pocket and enclosing the load sensor circuit and the signal processing circuit therein, the cover being coupled to the sensor body thereby forming a first hermetic seal therebetween;
• and
• a surgical end effector configured to couple to the distal end portion of the adapter assembly.