BU7291G-TR Datasheet, PDF (23/31 Pages) Rohm – CMOS Operational Amplifiers

BU7291G, BU7291SG, BU7294xx, BU7294Sxx
Datasheet
●Operational Notes
1) Absolute maximum ratings
Absolute maximum ratings are the values which indicate the limits, within which the given voltage range can be safely
charged to the terminal. However, it does not guarantee the circuit operation.
2) Applied voltage to the input terminal
For normal circuit operation of voltage comparator, please input voltage for its input terminal within input common mode
voltage VDD + 0.3V. Then, regardless of power supply voltage,VSS - 0.3V can be applied to input terminals without
deterioration or destruction of its characteristics.
3) Power supply (single / dual)
The op-amp operates when the voltage supplied is between VDD and VSS.
Therefore, the single supply op-amp can be used as dual supply op-amp as well.
4) Power dissipation Pd
Using the unit in excess of the rated power dissipation may cause deterioration in electrical characteristics including
reduced current capability due to the rise of chip temperature. Therefore, please take into consideration the power
dissipation (Pd) under actual operating conditions and apply a sufficient margin in thermal design. Refer to the thermal
derating curves for more information.
5) Short-circuit between pins and erroneous mounting
Be careful when mounting the IC on printed circuit boards. The IC may be damaged if it is mounted in a wrong orientation
or if pins are shorted together. Short circuit may be caused by conductive particles caught between the pins.
6) Short-circuit between pins and erroneous mounting
Operating the IC in the presence of a strong electromagnetic field may cause the IC to malfunction.
7) IC handling
Applying mechanical stress to the IC by deflecting or bending the board may cause fluctuations in the electrical
characteristics due to piezo resistance effects.
8) Board inspection
Connecting a capacitor to a pin with low impedance may stress the IC. Therefore, discharging the capacitor after every
process is recommended. In addition, when attaching and detaching the jig during the inspection phase, make sure that
the power is turned OFF before inspection and removal. Furthermore, please take measures against ESD in the
assembly process as well as during transportation and storage.
9) Output capacitor
If a large capacitor is connected between the output pin and VSS pin, current from the charged capacitor will flow into the
output pin and may destroy the IC when the VDD pin or VIN pin is shorted to ground or pulled down to 0V. Use a
capacitor smaller than 0.1μF between output pin and VSS pin.
10) Oscillation by output capacitor
Please pay attention to the oscillation by output capacitor and in designing an application of negative feedback loop
circuit with these ICs.
11) Latch up
Be careful of input voltage that exceed the VDD and VSS. When CMOS device have sometimes occur latch up and
protect the IC from abnormaly noise.
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