Digital precision pressure tester circuit shown in Fig. MAX1457 external ROM selection 93C66 type 4096b E2PROM. After power MCS end is pulled to a high level, check the main ch
ip. + 5V power supply through a resistor RBIAS (400k ) provide appropriate bias voltage to the bias circuit. C2, C4 and C6 are decoupling capacitors. C1, C3, C5, C7 ~ C11 are bypass capacitors. When taking RISRC 50k, excitation current 0.5mA. RSTC full scale temperature coefficient compensation resistor, R * LIN non-linear calibration resistor (can not). Pressure signal generated by the sensor after MAX1457 processing output from OUT terminal to the digital voltmeter (DVM), shows the measured pressure values.