### Q

I would like to calculate the total temp. Coefficient of this component.If i use the RFB as the feedback resistor of the external Amp. and connect an

external Ref. what is the total temp. Coefficient with respect to the following

Spec's:

1. Gain Temp. Coeff.: 5ppm/C

2. Input Res. Temp. Coeff.: -300ppm/C

### A

Provided that the Vref is a low impedance source, the effect of the absolutechange in i/p resistance will not affect the gain tempco of the device.

Therefore you should use a low impedance ref source and use the gain

temp.co-eff of 5ppm/degC as your reference.