Pressure monitoring system circuit using Intelligent sensor signal processor MAX1460 and the silicon pressure sensor
Silicon pressure sensor by the MAX1460 and the pressure detection system circuit as shown. System uses a 5V power supply, crystal oscillator frequency is 2MHz. Formed by the power divider R1 and R2, the analog ground (AGND) to the midpoint connected to the power supply. C for the power supply decoupling capacitors. Host can be PC, the host first test and receive MAX1460 MAX1460 12-bit parallel data output, and then test the system out, MAX1460 to be tested with a sensor to form a high-precision intelligent pressure monitoring system, the conversion rate 15 times / sec, measurement error is less than ± 0.1%. For example, MAX1460 on NPH8-100-EH-type silicon pressure sensor, the sensor error curve before and after compensation, respectively, as shown in Figure (a), (b) below. Figure in the FSO that full-scale, OFFSET said disorders, ? that the relative error of full scale. It is obvious that after a full compensation of sensor errors reduced by two orders of magnitude.