Frequently Asked Questions |ROHM Semiconductor

5 Results for Low Power Operational Amplifiers

FAQ Category

Notation of Datasheet's condition

Product type / feature / difference

Connection on the back side (pad, FIN, tab)

Terminal voltage input sequence

When power supply is not applied / OFF / 0 V

Applying terminal voltage above power supply voltage

Characteristics of output voltage

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Where are the ground sense features of the opamp listed in the datasheet?
- Ground sense opamps can operate up to the ground level of the input signal. The minimum value listed in the parameter for the common mode input voltage range is 0V (=Ground Level=VEE)

Where do you connect the thermal pad of the VSON package for the BU7262NUX, BU7242NUX, BU7462NUX, and BU7442NUX?
- Connect the thermal pad to open or VSS. Since the thermal pad and IC chip are connected, connecting to a signal line may lead to malfunction due to the effects of noise.

For CMOS opamps, if a positive voltage is supplied to the input pin when the power supply is not turned ON or the supply voltage is 0V, will current flow from the input terminal to the power supply?
- For CMOS opamps (products specified by VDD/VSS, V+/GND), if the diode between the input and supply pins is biased in the forward direction, current will flow, resulting in degradation and possibly destruction. As a countermeasure, insert a resistor in series to limit current flowing through the diode to less than 10mA. Also be sure to thoroughly evaluate the circuit.

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