MCP6292: Stability over temperature

Hello Prahlad,

Many parameters change with temperature, thereby potentially changing the output.  It's important to note that the final variation in output is dependent not only upon the amplifier, but also upon factors such as the gain of the circuit or how much the external components change across temperature.

I would point your customer to a few different sections in the datasheet.  First, the section describing the maximum voltage offset at the input across temperature and the typical offset drift across temperature.

I would also point them toward figure 1 of the datasheet, which will provide the customer with a better grasp of how much drift can vary based upon a selection of sample devices that were tested.

Figure 6 will give them an idea of how much the bias current will change with temperature.  The bias current is more likely to be important if large impedances are seen at the input.  For many applications, the bias current for this device at 80C will be acceptably small.

The phase margin will be heavily reliant on the configuration of the circuit.  A schematic would be needed to know the gain/phase margin.  However, if the quiescent current of the amplifier is steady across temperature, then it is unlikely that the phase and gain margin will change much.  What is more likely to be problematic is the change in component values of the external components (i.e. resistors, capacitors, etc.) with temperature.

Regards,

Daniel