OPA2187: About the functions of OPA2187

Tool/software:

Could you confirm the below question for OPA2187?

• Regarding the input bias current of the OPA2187, do both amplifiers (from the IC's perspective) flow in the same direction? Or does the direction change randomly during operation (e.g., one flows to the negative side, the other to the positive side)?
• Is it possible for the value of the input bias current to fluctuate due to the operation of the internal chopper circuit in the OPA2187?
• Could the input bias current momentarily increase due to some trigger (e.g., temperature changes, internal circuit offsets) during operation?
• At room temperature (20°C to 28°C), is there any possibility that the input bias current could increase due to the operation of the internal circuits of the amplifier?
• If the answer to question (4) is "YES," at what timing and through what mechanism might the internal circuits cause the bias current to increase

Regards

Kohei Nagaoka