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Signal Conditioning – Polynomial Behavior

The A17700 offers high output accuracy for various membrane structures and temperature environments by conditioning the input signal over pressure and temperature with polynomial up to the 4th order. The compensation algorithm takes as inputs the pressure as sensed by the external pressure sensor (Wheatstone bridge) and the temperature as sensed by the internal temperature sensor. The internal DSP compensates the pressure with a polynomial function up to the 4th order that also includes temperature. Flexible built-in error compensation algorithm Poly (1,1) to Poly (4,4) allows the customer to optimize sensor accuracy vs test cost. When lower number of points is only available, polynomial with lower number of freedom gives lower error.

PTM Published on: 2021-04-07