I want to make a Voltage to Current converter that has an output of 4-20mA and these are my general specs for it.
Output signal current:0 - 20 mA
Load impedance:< 500 Ohm
Linearity:± 2 LSB or better
Resolution:12 Bit minimum
Conversion time (typ):2 ms maximum
Measuring error (25°):< ± 0.1 % of the full scale value
Temperature coefficient: < ± 0.01 % / K of the full scale value
Isolation system/supply: 500 V (optional for this project).
however i notice that alot of current source converter have very high output impedance and i wanted to check how i can achieve this low impedance current source? or did i go completely in the wrong direction...
Output signal current:0 - 20 mA
Load impedance:< 500 Ohm
Linearity:± 2 LSB or better
Resolution:12 Bit minimum
Conversion time (typ):2 ms maximum
Measuring error (25°):< ± 0.1 % of the full scale value
Temperature coefficient: < ± 0.01 % / K of the full scale value
Isolation system/supply: 500 V (optional for this project).
however i notice that alot of current source converter have very high output impedance and i wanted to check how i can achieve this low impedance current source? or did i go completely in the wrong direction...