ANOOP AMBALAKKANDY

I want to build a miniature circuit which perform the following functions 1.Measure a voltage signal between 0-20 millivolt DC signal 2.Measure a voltage signal between 0-24 V DC signal 3.Calculating a compensation factor as K = a Constant/voltage measured at step2 4. Multiply the compensation factor K with millivolt signal of step1 5.Transmit value got in step4 as standard 4-20Ma[500 Ohm] /RS485 signals I want the circuit to be made on a single board with ICs [as tiny as possible]. Thank you.