BU7241G_14 Datasheet, PDF (35/48 Pages) Rohm – CMOS Operational Amplifiers

BU7241G BU7241SG BU7242xxx BU7242Sxxx BU7244xx BU7244Sxx ^Datasheet
Operational Notes – continued
12. Regarding the Input Pin of the IC
In the construction of this IC, P-N junctions are inevitably formed creating parasitic diodes or transistors. The
operation of these parasitic elements can result in mutual interference among circuits, operational faults, or physical
damage. Therefore, conditions which cause these parasitic elements to operate, such as applying a voltage to an
input pin lower than the ground voltage should be avoided. Furthermore, do not apply a voltage to the input pins when
no power supply voltage is applied to the IC. Even if the power supply voltage is applied, make sure that the input pins
have voltages within the values specified in the electrical characteristics of this IC.
13. Unused Circuits
VDD
When there are unused op-amps, it is recommended that they are
connected as in Figure 79, setting the non-inverting input terminal to a
potential within the Input Common-mode Voltage Range (VICM).
14. Input Voltage
Keep this potential
in VICM
VICM
Applying VDD+0.3V to the input terminal is possible without causing
deterioration of the electrical characteristics or destruction. However,
this does not ensure normal circuit operation. Please note that the
VSS
circuit operates normally only when the input voltage is within the
common mode input voltage range of the electric characteristics.
Figure 79. Example of Application Circuit
15. Power Supply(single/dual)
for Unused Op-amp
The operational amplifier operates when the voltage supplied is between VDD and VSS. Therefore, the single supply
operational amplifiers can be used as dual supply operational amplifiers as well.
16. 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 is shorted to ground or pulled down to 0V. Use a capacitor
smaller than 0.1uF between output pin and VSS pin.
17. 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.
18. 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.
19. Decupling Capacitor
Insert the decupling capacitance between VDD and VSS, for stable operation of operational amplifier.
20. Radiation Land
The VSON008X2030 package has a radiation land in the center of the back. Please connect to VSS potenital or don't
connect to other terminal.
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TSZ02201-0RAR0G200240-1-2
03.Dec.2014 Rev.003