Comparison of two operational amplifiers in relation to the load

[somayeh]

Hello everyone,

There is a block diagram as attached. and I should decide if an alternative pin to pin compatible OP (as impedance converter in the circuit )with this part number TLV342AIDR can be replaced instead of this OP with part number AD8692ARZ on a big board,
that is, I must not replace the whole board if possible.

Now, my question is how could I compare these two opamp to understand that if the alternative one could do the same job with 100nF load? Because the old board has the ability to tolerate 100nF without additional way.


P.S: On the data sheet I could not find a proper comparison

best regards,
Somayeh

 

[Audioguru]

The resistance of your 1 ohms load on either opamp is a dead short.
Most opamps need at least 100 ohms to drive the 100nF capacitor.
Maybe the 100nF capacitor is actually only 100pF of stray wiring capacitance.

 

[somayeh]

The resistance of your 1 ohms load on either opamp is a dead short.
Most opamps need at least 100 ohms to drive the 100nF capacitor.
Maybe the 100nF capacitor is actually only 100pF of stray wiring capacitance.

Yes, exalclly. But I am not allowed to change the Board. And it have work until now with AD8692ARZ .
I found that OP in TINA. Now I should compare 2 OPs in two different simulators (LTspice and TINA). I simulated the TLV342 in TINA, with our requirment( step response of 100mV and offset voltage of 2.4 V ,see screenshot in uploded) and the AD8692ARZ in LTspice . how does it look? Is my simulation and comparison correct?