UPC177G2, UPC339G2

R03DS0139EJ0200 Rev.2.00

Page 6 of 7

Feb.4.25

USE WITH PRECAUTIONS

Managing unused circuits

If there is an unused circuit, the following connection is recommended.

Example of unused circuit process

• Ratings of input/output pin voltage

When the voltage of input/output pin exceeds the absolute maximum rating, the parasitic diode within the

IC may conduct, causing characteristics degradation or damage. In addition, if the input pin is lower than

V−, or the output pin exceeds the power supply voltage, it is recommended to make a clamping circuit using

a diode with low forward voltage (e.g.: Schottky diode) as protection.

• Range of common-mode input voltage

When the supply voltage does not meet the condition of electrical characteristics, the range of common-

mode input voltage is as follows.

VICM (TYP.): V - ~ V + -1.5 [V] (TA = 25 °C)

During designing, do include some tolerance by considering temperature characteristics etc.

• Regarding Input Current

The Input Bias Current [IB] specified in the electrical characteristics table, is the average value of current

flowing through the +input terminal [IN] and the current flowing through the –input terminal [II} in the balanced

state of the differential amplifier circuit of the input stage (with negative feedback).

Therefore, since the differential amplifier circuit of the input stage is not balanced during comparison

operation (in the case of comparator operation), the input current flows twice as much towards the low

potential terminal.

• Handling of ICs

When stress is added to the ICs due to warpage or bending of a board, the characteristic may fluctuates

due to piezoelectric (piezo) effect. Therefore, pay attention to warpage or bending of a board.

OUT

(オープン)

V -

-

+

同相入力電圧範囲

(VICM) 内の電位へ

V -

V +

To potentials within the

range of common-mode

input voltage (VICM)

(Open)