Patent ID: 8186226

Claim:
A pressure sensor, comprising: a package substrate including a first side and a second side; a pressure sensing die mounted relative to the first side of the package substrate, the pressure sensing die including: a pressure sensing diaphragm; one or more piezoresistive elements disposed on or adjacent to the pressure sensing diaphragm, wherein the one or more piezoresistive elements have a resistance that varies with an applied pressure to the pressure sensing diaphragm; a zener diode trim network, wherein the zener diode trim network includes one or more zener diodes and one or more resistive elements, wherein the zener diode trim network is configured to be trimmed to compensate for one or more errors and/or offsets of the pressure sensor; an on-board heating element, wherein the on-board heating element is configured to heat the pressure sensor when a current is applied to the heater element; and a housing including a first housing member and a second housing member, the first housing member is mounted on the first side of the package substrate, the second housing member is mounted on the second side of the package substrate, wherein at least one of the first housing member and the second housing member has a pressure port for exposing the pressure sensing diaphragm of the pressure sensing die to a first input pressure.