Datasheet

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TSZ02201-0RAR1G200560-1-2

© 2012 ROHM Co., Ltd. All rights reserved.

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30.NOV.2012 Rev.001

TSZ22111･15･001

LMR321G, LMR358xxx, LMR324xxx

●Operational Notes

1) Processing of unused circuit

It is recommended to apply connection (see the Figure 85.) and set the non

inverting input terminal at the potential within input common-mode voltage range

(Vicm), for any unused circuit.

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) Short-circuit of output terminal

When output terminal and VDD or VSS terminal are shorted, excessive Output

current may flow under some conditions, and heating may destroy IC. It is

necessary to connect a resistor as shown in Figure 86, thereby protecting against

load shorting.

4) Operating power supply (split power supply/single power supply)

The voltage comparator operates if a given level of voltage is applied between

VDD and VSS. Therefore, the operational amplifier can be operated under

single power supply or split power supply.

5) Power dissipation (pd)

If the IC is used under excessive power dissipation. An increase in the chip

temperature will cause deterioration of the radical characteristics of IC. For example,

reduction of current capability. Take consideration of the effective power dissipation

and thermal design with a sufficient margin. Pd is reference to the provided power

dissipation curve.

6) Short circuits between pins and incorrect mounting

Short circuits between pins and incorrect mounting when mounting the IC on a printed circuits board, take notice of the

direction and positioning of the IC. If IC is mounted erroneously, It may be damaged. Also, when a foreign object is

inserted between output, between output and VDD terminal and VSS terminal which causes short circuit, the IC may be

damaged.

7) Using under strong electromagnetic field

Be careful when using the IC under strong electromagnetic field because it may malfunction.

8) Usage of IC

When stress is applied to the IC through warp of the printed circuit board, The characteristics may fluctuate due to the

piezo effect. Be careful of the warp of the printed circuit board.

9) Testing IC on the set board

When testing IC on the set board, in cases where the capacitor is connected to the low impedance, make sure to

discharge per fabrication because there is a possibility that IC may be damaged by stress. When removing IC from the set

board, it is essential to cut supply voltage. As a countermeasure against the static electricity, observe proper grounding

during fabrication process and take due care when carrying and storage it.

10) The IC destruction caused by capacitive load

The transistors in circuits may be damaged when VDD terminal and VSS terminal is shorted with the charged output

terminal capacitor.When IC is used as a operational amplifier or as an application circuit, where oscillation is not activated

by an output capacitor, the output capacitor must be kept below 0.1

μF in order to prevent the damage mentioned above.

11) Latch up

Be careful of input voltage that exceed the VDD and VSS. When CMOS device have sometimes occur latch up operation.

And protect the IC from abnormaly noise

12) Decupling capacitor

Insert the decupling capacitance between VDD and VSS, for stable operation of operational amplifier.

Status of this document

The Japanese version of this document is formal specification. A customer may use this translation version only for a reference

to help reading the formal version.

If there are any differences in translation version of this document formal version takes priority.

Connect

to Vicm

VCC

VEE

Vicm

-

+

application circuit for unused op-amp

Figure 85. The example of

Figure 86. The example of

output short protection

VEE

VCC

+

-

protection

resistor

VSS

VDD

VSS

VDD