Original question:
INA317: INA317 output voltage clamp @ specific common mode voltage
Hi Brain,
do we have any recommendation OP for load cell sensor?
Please provide us the load cell's input parameters, gain, available supply rails, output voltage range etc.. If the customer is interested in low cost IAs, then the following link would provide you with a guideline.
If you have other questions, please let us know.
Best,
Raymond
Hi Raymond
Appreciate for your reply.
input voltage:3.3V
output voltage: 1.2 +- 0.15mV.
Input impedance : 1000ohm
output impedance : 1000ohm
below is other spec load cell sensor. if you need to translate to english please let me know.
BRs
Brian
Hi Brain,
Here is INA317 simulation for the application. I do not recommend other lower cost IAs for the application.
INA317 1k Strain Gauge 10302024.TSC
The IA's gain needs to be around 90V/V to 100V/V range, which is to optimize the INA317's output range. There is slight discrepancy between the simulation and following calculator, where the calculate indicates the input range is 1.2V +/-13.3mV.The simulation indicated that it is able to cover 1.2V +/-15mV input range.
https://www.ti.com/tool/ANALOG-ENGINEER-CALC
Even with INA317, the system may still need to be calibrated (also depending on your accuracy requirements). If you use INA333, the system may not require to be calibrated.
If you have other questions, please let me know.
Best,
Raymond
