Part Number: LMH6574 Other Parts Discussed in Thread: OPA4872 ,
The input impedance of the buffered multiplexer IC LMH6574 is specified as 5 kilohms in the datasheet. That's very low for an input buffer. Is that really correct, or is there a printing…
Morning Giora,
I couldn't find a model for the LMH6570 (or the 4:1 version either).
There was a flurry of what I called buffered mux developmentsback in the 2006 to 2009 timeframe, The TI high speed group did a few,
1. the 2:1 version is the OPA875…
Morning Joaquin,
The 2.8pF is inside the THS3215 or THS3217,
Yes, ranging with attenuators is one way, you just have to be careful that stage can handle these higher slew rates. Mux's have their own issues, we have in the past done this with buffered…
Part Number: LMH6574 Other Parts Discussed in Thread: TL074 , OPA4872
Hello Ti Engineers!
I have run across a strange issue with the 6574. To verify the issue I built a test jig in which I give the 6574 just 2 inputs. The IC is powered by +/-5V, and…
Well Paul,
You may say this has worked before, but this "wired-or" mux application is not actually supported by standard CFA op amps. Ran into lots of problems with this over the years, and now you have too.
Couple of options we did in the product…
Thanks for looking into this. The data sheet seems clear that it refers to "output resistance" for "output disabled (/EN or SD > 2V)."
Anyway, I now think that OPA4872 might be the more attractive part for us:
Routdis = 14MOhm, not whatever it is…
Hi James,
Regarding the enable pin showing a 200ns ramp-down at disable:
To me, it seems the slow ramp is something that you observe if you use only the one MUX you are currently working with. With two MUX outputs shorted together, if MUX1 goes into…
