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AD5421 SCLK pin is consuming very high current

Question asked by dmotwani on Jun 13, 2017
Latest reply on Jun 18, 2017 by rrosario

Hi , I am using AD5421 for HART pressure transmitter.I connected the AD5421 to HART modem AD5700, microcontroller and 24bit ADC. When i connect the SCLK pin (SPI bus) of AD5421 to  microcontroller  SPI SCLK pin, the current consumption at loop input goes from 4 mA to 19mA. I do not getting understand how it is working and how to avoid this situation for my loop powered transmitter.Could any found this issue or any one can help me?