A stress sensor circuit operable to generate a digital voltage output, the stress sensor circuit comprising: a substrate configured to be subjected to mechanical stress; and a bridge circuit disposed on the substrate and coupled between an output node and a ground node, the bridge circuit comprising: a first branch having a first resistor of value R1, wherein the first resistor is coupled to a tunable resistor of value R at a first intermediate node; a second branch having a second resistor of value R2, wherein the second resistor is coupled to a variable reference resistor of value Rref at a second intermediate node, and wherein the variable reference resistor is configured to sweep through a plurality of discrete values Rref, whereby the variable resistor is configured to increase the value Rref in an upward sweep from a first value to a second value, and to decrease the value Rref in a subsequent downward sweep from the second value to the first value; and an amplifier having a positive input terminal coupled to the first intermediate node, and a negative input terminal coupled to the second intermediate node, wherein the amplifier is configured to generate the digital voltage output at the output node as a function of the mechanical stress applied to the substrate and of the value Rref. a substrate configured to be subjected to mechanical stress; and a bridge circuit disposed on the substrate and coupled between an output node and a ground node, the bridge circuit comprising: a first branch having a first resistor of value R1, wherein the first resistor is coupled to a tunable resistor of value R at a first intermediate node; a second branch having a second resistor of value R2, wherein the second resistor is coupled to a variable reference resistor of value Rref at a second intermediate node, and wherein the variable reference resistor is configured to sweep through a plurality of discrete values Rref, whereby the variable resistor is configured to increase the value Rref in an upward sweep from a first value to a second value, and to decrease the value Rref in a subsequent downward sweep from the second value to the first value; and an amplifier having a positive input terminal coupled to the first intermediate node, and a negative input terminal coupled to the second intermediate node, wherein the amplifier is configured to generate the digital voltage output at the output node as a function of the mechanical stress applied to the substrate and of the value Rref. a first branch having a first resistor of value R1, wherein the first resistor is coupled to a tunable resistor of value R at a first intermediate node; a second branch having a second resistor of value R2, wherein the second resistor is coupled to a variable reference resistor of value Rref at a second intermediate node, and wherein the variable reference resistor is configured to sweep through a plurality of discrete values Rref, whereby the variable resistor is configured to increase the value Rref in an upward sweep from a first value to a second value, and to decrease the value Rref in a subsequent downward sweep from the second value to the first value; and an amplifier having a positive input terminal coupled to the first intermediate node, and a negative input terminal coupled to the second intermediate node, wherein the amplifier is configured to generate the digital voltage output at the output node as a function of the mechanical stress applied to the substrate and of the value Rref.