UPC251, UPC1458

R03DS0118EJ0100 Rev.1.00

Page 7 of 8

Feb.18.25

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 as long as a predetermined voltage is applied between V + and V -. Therefore, it can operate with

a single power supply (V - = GND), but it cannot operate the input and output near GND. Common-mode input voltage

Please pay attention to the 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 - +2 ~ V + -0.5 [V] (TA = 25°C).

During designing, do include some tolerance by considering 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 - + 3 [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 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 unused circuit process

To potentials within

the range of

common-mode input

voltage (VICM)

Remark Note in this example, an intermediate voltage of V + and V – is applied.