TL071: Input Impedance

Alicia Lebby

Part Number: TL071
Other Parts Discussed in Thread: TL074,

I am working for an engineer who would like to know the exact input impedance to this amplifier. The data sheet (http://www.ti.com/lit/ds/symlink/tl071.pdf) doesn't specify a number for this part. It is being used for a low frequency rf application.

over 6 years ago

0 Paul Goedeke over 6 years ago

TI__Mastermind 30600 points

Hi Alicia,

If you could give us until early next week to get back to you, that would be appreciated. In the meantime, can you tell us what frequency range you're specifically interested in?

Thanks,
Paul

0 Ron Michallick over 6 years ago

TI__Guru*** 140136 points

Alicia,

I have a measurement from TL074. TL071 should be very close. Input capacitance is about 6pF for each input to ground and 4pf input to input.

0 Alicia Lebby over 6 years ago in reply to Paul Goedeke

Prodigy 30 points

The frequency is about 100kHz

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TL071: Input Impedance