We have an instrument that has analog output of 0-1 volts and we need to convert this to 0-5 volts. What is the best op amp to use for this and how should the resistors be set up? Any help would be greatly appreciated.
Since you used Arduino tag..., you don't need an opamp. Instead you can select ADC reference voltage on your arduino to 1.1V. This way you don't need any additional parts and you get the whole precision range.