BU7461G-TR Datasheet, PDF (33/44 Pages) Rohm – Ground Sense Low Voltage Operation CMOS Operational Amplifiers

BU7461G BU7461SG BU7462xxx BU7462Sxxx BU7464F BU7464SF ^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 in-phase input 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, regardless of
the supply voltage. However, this does not ensure normal circuit
VSS
operation. Please note that the circuit operates normally only when the
input voltage is within the common mode input voltage range of the
Figure 79. Example of Application Circuit
electric characteristics.
for Unused Op-amp
15. 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.
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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