My customer is using LM358, but on his application he would need one OP-AMP only, what is the connection should be on channel B? Should those be floating?

My customer use LM358 as differential op for over current protection. However they occur an issue for differential application. The blow is their schematic and issue description. Could you help check ...

To amplify the voltage from the off-the-shelf pH probe, [chris] chose an LMV358A, a high-impedance FET-input version of the venerable LM358 op-amp, so as not to load down the probe. A negative ...

[MaBe42] used the classic LM358 op amp for most of the circuits, along with 1N4148 diodes where possible and 1N4004s where needed – not for their higher power rating, but for their stronger leads.

The original filter, featuring an LM358 op amp, a 5V supply, and a 1.5V virtual ground established by Vbias1, is so arranged because the LM358 cannot reliably swing closer to the positive rail than ...