Magnetic sensor device and magnetic sensor system

A magnetic sensor device comprising:

• a first chip including a first magnetic sensor,
• a second chip including a second magnetic sensor and a third magnetic sensor, and
• a support having a reference plane, wherein
• the first magnetic sensor includes at least one first magnetic detection element and detects a first component of an external magnetic field, and the first component is a component of the external magnetic field in a first direction being a direction parallel to the reference plane,
• the second magnetic sensor includes at least one second magnetic detection element and detects a second component of the external magnetic field, and the second component is a component of the external magnetic field in a second direction being a direction inclined with respect to each of the reference plane and a direction perpendicular to the reference plane,
• the third magnetic sensor includes at least one third magnetic detection element and detects a third component of the external magnetic field, and the third component is a component of the external magnetic field in a third direction being another direction inclined with respect to each of the reference plane and the direction perpendicular to the reference plane,
• the first chip and the second chip are mounted on the reference plane,
• the first chip and the second chip are (i) disposed with a gap therebetween, and (ii) disposed such that, when viewed from the direction perpendicular to the reference plane, a virtual straight line passing through the gap and having a same distance from the first chip and from the second chip does not cross a barycenter of the support, and
• the support includes a processor configured to perform arithmetic using a plurality of detection signals generated by the first to third magnetic sensors.