I want to measure current using shunt resistor and I want to amplify the voltage over the shunt using an op-amp. The shunt resistor gives 60mV @ 60A. I tried LTC 1050(http://cds.linear.com/docs/en/datasheet/1050fb.pdf) but for input <20mV the gain is not constant. The op-amp has a supply of +/5V.
Vout is the signal that I want to send to ADC NI 9215, which has ±10 V measurement range and 16-bit resolution.
Do you know what features the op-amp should have for this purpose?
Which op-amp do you suggest to use?
Which circuit is the best for this application?