TLR342FVT datasheet(34/54 Pages) ROHM

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Datasheet

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TSZ02201-0RAR0G200720-1-2

34/51

03.Feb.2016 Rev.004

TSZ22111･15･001

TLR341G TLR342xxx TLR344xxx

Application Information – continued

1. Unused Circuits

When there are unused op-amps, it is recommended that they are

connected as in Figure 78, setting the non-inverting input pin to a

potential within the in-phase input voltage range (VICM).

2. Input Voltage

Applying VDD+0.3V to the input pin is possible without causing

deterioration of the electrical characteristics or destruction. However, this

does not ensure normal circuit operation. Please note that the circuit

operates normally only when the input voltage is within the common

mode input voltage range of the electric characteristics.

3. Power Supply(single/dual)

The operational amplifiers operate 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.

4. 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 0.1µF between output pin and VSS pin.

5. 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.

6. 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.

7. Shutdown Terminal

The shutdown terminal can’t be left unconnected. In case shutdown operation is not needed, the shutdown pin should be

connected to VDD when the IC is used. Leaving the shutdown pin floating will result in an undefined operation mode,

either shutdown or active, or even oscillating between the two modes.

Figure 78. Example of Application Circuit

for Unused Op-amp

Keep this potential

in VICM

VSS

VDD

VICM

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