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INA333: specs

J-ZHOU8
Intellectual 2780 points
Part Number: INA333
Other Parts Discussed in Thread: INA326,

Hi experts

My customer was looking for a replacement for the INA326.
When using the INA326, the output would occasionally experience latch-up (getting stuck at +5V) during power-up, possibly due to the steep rise of the power supply (+5V). Therefore, they were searching for a different amplifier.
The INA333 seemed suitable, and I was able to implement it by changing the peripheral resistors and capacitors without modifying the PCB pattern.
The results were positive, with no latch-up occurring.
We believe the INA333 is a valid candidate, is this correct?

 

Regards,

Zhou

  • 0
    TI__Mastermind 28420 points

    Hi Zhou,

    Was the INA326 being used in already existing designs? 

    These instrumentation amplifiers have different architectures with the INA326 being current feedback while the INA333 being the more classic voltage feedback design. 

    That said, if this is working in your system then the INA333 would likely be a great fit. Just make sure that VREF is going to a low impedance voltage source as to not create any error in the internal reference voltage network.

    Best Regards,

    Robert Clifton