LM393True. I have several types of op amps in my stock but no comparators. What would you recommend having on hand?
LM393True. I have several types of op amps in my stock but no comparators. What would you recommend having on hand?
You've got to have an LM339 or LM393 because that's what everyone thinks of when you say "comparator", but I'd also have a TLC3702 or something with push-pull outputs for those occasions when the open-collector output of the LM339/393 is not ideal.True. I have several types of op amps in my stock but no comparators. What would you recommend having on hand?
OK, I'll pick up a few to have on hand. Interesting chip looking at the PDF. Read the section on ESD protection for CMOS and how TI had built it in. For multi op amp devices the standard practice is to ground all unused pins?I'd also have a TLC3702
No. And also, not just the unused inputs. Two things.For multi op amp devices the standard practice is to ground all unused pins?
Not at all! So, -input to output (voltage follower), and +input to +rail (don't think so because rail voltage may be greater than common mode voltage)? Or, +input to another active +input that would be in the common mode voltage range (which will be either a fixed or variable voltage)? Better yet, don't use chips with extra unused op amps. Learning quite a bit not covered in the basic textbooks here. Thx!Didn't see that one coming, did ya?
OK, makes sense. In those cases, would the output then be grounded (I would think so)? Or left floating?Those types would be better with the inputs tied together,
Most comparators have a common-mode input range that includes the negative supply. If so, then connect to negative supply, which will probably be ground.OK, makes sense. In those cases, would the output then be grounded (I would think so)? Or left floating?
Is that the circuit in post #12? How about schematics for the 741 and 301 circuits that show every pin?Started breadboarding the circuit.
Without the internal compensation that the LM324 and LM358 have.These are open-collector comparator versions of the LM324 and LM358.
Not sure I follow you here... V1 is the SigGen applied to pin 2 -input. V2 is 8V applied to pin 3 +input.the text in the drawing does not match the parameters listed for either V1 or V2
Don't think so. Neither the 741 nor the 301 are "rail-to-rail" devices.If all resistances are equal (e.g. 100kΩ), the threshold voltages will be 1/3 and 2/3 of the supply voltage, respectively.
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