UPC258, UPC4558

R03DS0145EJ0200 Rev.2.00

Page 7 of 8

Feb.27.25

USE WITH PRECAUTIONS

• Managing unused circuits

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

• Power Supply (Dual Power Supply / Single Power Supply)

The op amp operates when a predetermine voltage is applied between V + - V - . Therefore, while it operates from a

single power supply (V - = GND), it is not possible to operate the input and output near GND. So please be careful of the

common-mode input voltage range and maximum output voltage

• 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 − +1 ~ V + -1 [

V] (TA = 25 °C).

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

• Maximum output voltage

The TYP. value range of the maximum output voltage when the supply voltage does not meet the condition of electrical

characteristics is as follows:

Vom + (TYP.) : V + -1 [V] (TA = 25 °C), Vom - (TYP.) : V - +1 [V] (TA = 25 °C)

During designing, do include some tolerance by considering characteristics variation, temperature characteristics and

so on. In addition, also note that the output voltage range (Vom+ − Vom−) will become narrow when the output current

increases.

• 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.

V -

+

-

V -

V +

V +

R

R

同相入力電圧範囲

(VICM) 内の電位へ

Example of handling unused circuit

To potentials within

the range of

common-mode input

voltage (VICM)

Remark: In this example, an intermediate potential between V + and V - is applied.