I'm testing AD8422 using EVAL-INAMP board.
Test set-up is the following:
I'm using AD8422 to amplify the siganl from bridge circuit.
when I/P voltage 5V,RG = 301 ohm i see the output amplified linearly.
for 0KG on bridge ckt = 0.3824V
1KG = 0.5089
2kG = 0.6350
3Kg = 0.7611
But for RG = 100 ohm
0KG = 2…
I'm trying to find out the reason of difference result with voltage divider at the VIN+/VIN- inputs and without it.
Can you please help me to find out the reason ?
Test 1. : Diamond Plot
Input : Vin+ = +3V DC, Vin- = GND
Output = 3V
We are using op-amp (P/N: AD8422BRZ) to measure current using Rsense (10 ohms resistor). The calculations and simulations are matching but the actual measurement doesn’t.
For the given below circuit, With 270 ohms load, I = 86mA.
Drop across R50…
I didn't know that AD8422 minimum single supply voltage spec changed from 3.6V to 4.6V. I have not checked its data sheet in English, only checked the one in Japanese. Certainly some AD8422s' Gain I have been testing are smaller
I have used AD620 for my earlier analog front end circuits. I want to replace AD620 with AD8422.
I want to replicate the CMRR vs Frequency graph given in the data sheet and the results I have got is too diverse.
Can anyone instruct me the techniques…