I was referring to MT-070 to ad filter circuit to AD8226.
IOUT_ AD5420 and IOUT_ AD5420_R are two terminal of resistor in a 4-20mA current loop where I'm sensing. As HART signals also flows through my 4-20mA loop, Is there any dependency while selecting filter to this instumentation amplifier with respect to frequency. HART signals at loop(FSK signal) will be at frequency 1.2KHz and 2.2KHz. Please help me out.
Nidhi P Shetty
AD5420 IOUT will be flowing in a loop along with it's HART. In between that I'm sensing across a external resistor in loop using AD8226 . AD8226 output is given to ADC to provide a feedback and automatically correct error if any. So my concern is that HART should not get effected because of this sensing. As I'm sensing voltage anyways 0-20mA/4-20mA current will not get effected. But I've concern regarding HART.As it is a separate path from that of load how can I directly decide that the resistor value can be upto load value.
Similar configuration is there with AD5421 as well in my design.
Hart should flow only in loop . It should not get effected by sensing circuit. Please help me out