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CCS/LM334: LM334 current increases

Part Number: LM334
Other Parts Discussed in Thread: LM4132

Tool/software: Code Composer Studio

Hello,

                      I want generate constant current  of 6.094 mA using LM334(3 Terminal). My resistor selection is 22.1 ohm(0.1%) and 221 ohm(0.1%) with V+ is +12 V  as per datasheet .

                       Problem is current always increases from 6.094 mA to 7.038..(on and on) and hence my PT-100 temperature sensor output continuously increases.i want 0.1 C accuracy using PT-100 but as the current continuously increases my temperature get never steady. please help me as early as possible.

 Thanks in Advance