Datasheet

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TSZ02201-0RAR1G200030-1-2

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

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20.Nov.2014 Rev.003

TSZ22111･15･00

BA4580Rxxx BA4584FV BA4584Rxx

Operational Notes – continued

11. Regarding the Input Pin of the IC

This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them

isolated. P-N junctions are formed at the intersection of the P layers with the N layers of other elements, creating a

parasitic diode or transistor. For example (refer to figure below):

When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode.

When GND > Pin B, the P-N junction operates as a parasitic transistor.

Parasitic diodes inevitably occur in the structure of the IC. The operation of parasitic diodes can result in mutual

interference among circuits, operational faults, or physical damage. Therefore, conditions that cause these diodes to

operate, such as applying a voltage lower than the GND voltage to an input pin (and thus to the P substrate) should

be avoided.

Figure 77. Example of monolithic IC structure

12. Unused Circuits

It is recommended to apply the connection (see Figure 78.) and set the

non-inverting input terminal at a potential within the Input Common-mode

Voltage Range (VICM) for any unused circuit.

13. Input Voltage

Applying VEE +36V to the input terminal is possible without causing

deterioration of the electrical characteristics or destruction, regardless of

the supply voltage. However, this does not ensure normal circuit operation.

Please note that the circuit operates normally only when the input voltage

is within the common mode input voltage range of the electric

characteristics.

14. Power Supply(single/dual)

The operational amplifier operates when the voltage supplied is between VCC and VEE. Therefore, the single supply

operational amplifier can be used as dual supply operational amplifier as well.

15. IC Handling

When pressure is applied to the IC through warp on the printed circuit board, the characteristics may fluctuate due to

the piezo effect. Be careful with the warp on the printed circuit board.

16. The IC Destruction Caused by Capacitive Load

The IC may be damaged when VCC terminal and VEE terminal is shorted with the charged output terminal capacitor.

When IC is used as an operational amplifier or as an application circuit where oscillation is not activated by an output

capacitor, output capacitor must be kept below 0.1μF in order to prevent the damage mentioned above.

VEE

VCC

VICM

N

N

P+

P

N

N

P+

P Substrate

GND

N

P+

N

N

P+

N P

P Substrate

GND

GND

Parasitic

Elements

Pin A

Pin A

Pin B

Pin B

B

C

E

Parasitic

Elements

GND

Parasitic

Elements

C

B

E

Transistor (NPN)

Resistor

N Region

close-by

Parasitic

Elements

Keep this potential

in VICM

Figure 78. Example of Application Circuit

for Unused Op-amp