LM358N 参数 Datasheet PDF下载

LM358N/D

Note 1

The dissipation is the total of both amplifiers—use external resistors, where possible, to allow

the amplifier to saturate or to reduce the power which is dissipated in the integrated circuit.

Note 2:

Short circuits from the output to V

+

can cause excessive heating and eventual destruction.

W h e n c o n s i d e r i n g s h o r t c i r c u i t s t o g r o u n d , t he m a x i m u m o u t p u t c u r r e n t i s a p p r o x i m a t e l y 4 0 m A

independent of the magnitude of V

+

. At values of supply voltage in excess of +15V, continuous

short-circuits can exceed the power dissipation ratings and cause eventual destruction. Destructive

dissipation can result from simultaneous shorts on all amplifiers.

Note 3:

This input current will only exist when the voltage at any of the input leads is driven negative.

It is due to the collector-base junction of the input PNP transistors becoming forward biased and

t h e r e b y a c t i n g a s i n p u t d i o d e c l a m p s . I n a d d i t i o n t o t hi s d i o d e a c t i o n , t h e r e i s a l s o l a t e r a l N P N p a r a s i t i c

transistor action on the IC chip. This transistor action can cause the output voltages of the op amps to

go to the V

+

voltage level (or to ground for a large overdrive) for the time duration that an input is

driven negative. This is not destructive and normal output states will re-establish when the input

voltage, which was negative, again returns to a value greater than -0.3V (at 25°C).

N o t e 4 :

W i t h t h e D 3 5 8 , a l l t e m p e r a t u r e s p e c i f i c a t i o n s a r e l i m i t e d t o - 2 5

℃

≤

Ta

≤

8 5

℃

.

Note 5:

Vo=1.4V, Rs = 0

Ω

with V

+

from 5V to 30V; and over the full input common-mode range (0V to

V

+

-1.5V) at 25°C

Note 6:

The direction of the input current is out of the IC due to the PNP input stage. This current is

essentially constant, independent of the state of the output so no loading change exists on the input

lines.

Note 7:

The input common-mode voltage of either input signal voltage should not be allowed to go

negative by more than 0.3V (at 25°C). The upper end of them common-mode voltage range is V

+

-1.5V

(at 25°C), but either or both inputs can go to +32V without damage, independent of the magnitude of

V

+

.

N o t e 8 :

D u e t o p r o x i m i t y o f e x t e r n a l c o m p o n e n t s , i n s ur e t h a t c o u p l i n g i s n o t o r i g i n a t i n g v i a s t r a y

capacitance between these external parts. This typically can be detected as this type of capacitance

increases at higher frequencies.

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