Dear ones,

I need the following info on a readymade card :-


1) Vref applied to My ADC is 2.5v DC so what is the conditioned signal to apply to its analog input port after conditioning ,is it of the range of
0---2.5V DC or 0--5vdc ??? .

2) Please tell me any Chip IC to convert 0--20mA to 0--2.5V DC to apply to ADC.I dont want to use simply Resistor as it is error prone .

3) Please tell some chip to apply accurate reference to ADC as presently it is tied to VCC so I suspect it to be very noisy.

Best
Michael Ott