Bridge the digital pressure signal conditioner MAX1458 excitation circuit diagram

  
Bridge the digital pressure signal conditioner MAX1458 excitation circuit is shown. Using the output DAC3 to change the size of the sensor excitation current IBR, you can achie
Bridge the digital pressure signal conditioner MAX1458 excitation circuit diagram - schematic

ve full-scale fine calibration. IISRC reference current by RISRC and 9-pin voltage is set. V1 and V2 composed of current mirror, the current gain of 14 times, allow the excitation current IBR 14IISRC. IBR programming range is 0.1 ~ 2mA. Analog switches S1, S2 on-off state governed by the configuration registers. Obviously, when the full-scale output voltage changes, DAC3 bridge will be compensated by changing the output voltage, BR, thereby correcting the full-scale error. DAC4 full scale temperature coefficient for correcting errors.




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