The LF is a low cost high speed JFET input operational amplifier with an internally trimmed input offset voltage. (BI-FET IITM technology) The device requires. ABSOLUTE MAXIMUM RATINGS. Symbol. Parameter. LF LF LF Unit. VCC. Supply voltage – note 1). 1. . This datasheet has been download from. LFN from STMICROELECTRONICS >> Specification: Operational Amplifier, Single, 1 Amplifier, 4 MHz, 16 V/µs, Technical Datasheet: LFN Datasheet.
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LFN NTE Equivalent NTEM IC JFET INPUT OP AMP – Wholesale Electronics
Anyone know what pins I should use? The pinout is in the datasheet. The LF opamp is old and is not made anymore.
Similar opamps are available. Ordinary opamps cannot drive low impedance headphones. I usually go to datasheet sites but looking for LF in Google links to its datasheet that shows its pin numbers and a picture of its layout. I have the pin out but I guess what I’m trying to ask is what pins in the schematic are in use? The schematics I’m familiar with for ics are like this one. Papabravo Well-Known Member May 6, The data sheet has all the information that you require.
The pin numbers assigned to the output, the non-inverting input marked with a plus sign, and the non-inverting input marked with a minus sign are unabiguous. In much the same way that logic circuits are designed, modern CAD packages automatically hook the power supply pins to the appropriate voltages.
It is a level of detail that is not needed once you look at the datasheet. So I guess what I am saying is look at the datasheet, then come back with more questions. Did I mention you need to look at the datasheet. I think the circuit is supposed to give a hum when a nearby cell phone is ringing? Then it uses the strong UHF or microwave signal transmitted to overload the input of the opamp.
I don’t know if other similar opamps like the TL will overload the same. The TL opamp has the same pin numbers.