Data Sheet G18672EJ1V0DS

8

μPC835

PRECAUTIONS FOR USE

O The process of unused circuits

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

Process example of unused circuits

V

V

+

V

V

+

R

R

−

+

To potentials within the range of

common-mode input voltage (VICM)

O Power supply to be used (single/dual)

Operational amplifiers operate when a given voltage is applied to between V+ and V−. Therefore, they can operate

with a single power supply (V− = GND). However, since input/output around the GND is impossible with the single

power supply, it is required to pay attention to the common-mode input voltage range and the maximum output

voltage when using them.

O Ratings of input/output pin voltage

When the voltage of input/output pin exceeds the absolute maximum rating, it may cause degradation of

characteristics or damages, by a conduction of a parasitic diode within an IC. In addition, when the input pin may be

lower than V−, or the output pin may exceed the supply voltage, it is recommended to make a clump circuit by a

diode whose forward voltage is low (e.g.: Schottky diode) for protection.

O 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−

+3 to V+ (V) (TA = 25°C)

During designing, consider variations in characteristics and temperature characteristics for use with allowance.

O The maximum output voltage

The range of the TYP. value 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, RL ≥ 10 kΩ), VOm− (TYP.): V− +1.7 (V) (TA = 25°C, RL ≥ 10 kΩ)

During designing, consider variations in characteristics and temperature characteristics for use with allowance.

In addition, note that the output voltage range (VOm+

− VOm−) becomes narrow when an the output current

increases.

O Handling of ICs

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

piezoelectric effect. Therefore, pay attention to warpage or bending of a board.