L6374DP Просмотр технического описания (PDF) - STMicroelectronics

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L6374DP

INDUSTRIAL QUAD LINE DRIVER

STMicroelectronics 

L6374

APPLICATION NOTE

It is recommended not to leave the Ref pin

(pin 11) floating: if not used with an external volt-

age reference, it is better to connect an external

capacitor (of at least 10nF) between this pin and

ground.

This capacitor filters the voltage reference against

voltage spikes that can be generated by the com-

mutation of the output stages.

This is very common using capacitive loads: in

fact, the initial transient of such loads behaves

like a short circuit, so the current flowing through

the outputs presents very high spikes.

Moreover, if the device is used as a line receiver.

(i.e. the input signals can go below ground) it is

required not to leave the Ref pin (pin 11) floating:

in this case, the pin can be connected to ground

or to a fixed external voltage reference.

10/13

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