MC6566 Equivalent WITHOUT Hysteresis

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I have a situation, somewhat like Klaus', where I need to
(purposefully) use a comparator as a quasi-OpAmp.

An MCP6566 fits the bill as to speed, open-drain output, and low
supply requirements.

What I need is an MCP6566 look-alike EXCEPT no hysteresis.

Suggestions?
        
                                        ...Jim Thompson
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| James E.Thompson                                 |    mens     |
| Analog Innovations                               |     et      |
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Re: MC6566 Equivalent WITHOUT Hysteresis
On 08/07/2017 16:16, Jim Thompson wrote:
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AZV331 ?

Or if you want a real op-amp with totem pole output then the companion  
AZV831.

piglet



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Re: MC6566 Equivalent WITHOUT Hysteresis
On 07/08/2017 11:33 AM, Piglet wrote:
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I think this FAN156 is a closer match:

<http://www.onsemi.com/pub/Collateral/FAN156.pdf.pdf

Re: MC6566 Equivalent WITHOUT Hysteresis
On 07/08/2017 11:39 AM, bitrex wrote:
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Nevermind, it's got internal hysteresis too! I don't see it on the  
diagram though...

Re: MC6566 Equivalent WITHOUT Hysteresis
wrote:

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MCP6566 is ~50ns part, 331's are in the 600ns and higher range.
        
                                        ...Jim Thompson
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Re: MC6566 Equivalent WITHOUT Hysteresis
On Sat, 08 Jul 2017 15:59:03 -0700, Jim Thompson

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The KA139 ?
No mention of Hysteresis. Open Collector, dual.


Cheers

Re: MC6566 Equivalent WITHOUT Hysteresis
On Sat, 08 Jul 2017 22:43:50 -0400, Martin Riddle

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Can't find it.  Link?  Isn't that a variant of the oldie 139/239/339?
        
                                        ...Jim Thompson
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Re: MC6566 Equivalent WITHOUT Hysteresis
On Sun, 09 Jul 2017 08:54:48 -0700, Jim Thompson

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<http://www.onsemi.com/pub/Collateral/KA319.pdf.pdf
But its a 5v part :(

Cheers

Re: MC6566 Equivalent WITHOUT Hysteresis

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Your link is much better than the one I found. It claimed the response time  
was 1.5us, yours says 80ns for 2mv overdrive. That's much better.

Your link also shows the supply goes from 5v to +/- 15v. The transfer  
function in Fig. 3 on page 5 shows the response around 0mv. This is quite  
interesting. Many comparators oscillate under these conditions. The KA319  
might be exactly what JT is looking for. Nice catch.


Re: MC6566 Equivalent WITHOUT Hysteresis

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Fairchild made some nice IC's. If you looking for 15v opamps in a SOT
package Fairchild is the only one that has a few, as far as I can see.

Cheers
  

Re: MC6566 Equivalent WITHOUT Hysteresis
On 09/07/2017 21:42, Steve Wilson wrote:
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Looks like that KA319 is a second source of the NatSemi LM319 ?

piglet

Re: MC6566 Equivalent WITHOUT Hysteresis
On Sun, 09 Jul 2017 16:13:08 -0400, Martin Riddle

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Strange numbering!  Schematic somewhat resembles the LM311.
        
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Re: MC6566 Equivalent WITHOUT Hysteresis
On Sun, 09 Jul 2017 14:00:57 -0700, Jim Thompson

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My left middle finger is getting slower as I age ;)

Cheers

Re: MC6566 Equivalent WITHOUT Hysteresis
On Sun, 09 Jul 2017 18:55:15 -0400, Martin Riddle

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One of my hands always gets ahead of the other, producing hilarious
transliterated misspellings ;-)

(Which I why I always use the spelling checker... but it ends up
letting me down... as in a recent "fond" instead of "found" :-(
        
                                        ...Jim Thompson
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Re: MC6566 Equivalent WITHOUT Hysteresis
On Sat, 08 Jul 2017 08:16:07 -0700, Jim Thompson

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Umm, why?


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John Larkin         Highland Technology, Inc

lunatic fringe electronics  


Re: MC6566 Equivalent WITHOUT Hysteresis
On Sat, 08 Jul 2017 10:09:09 -0700, John Larkin

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A special application slew rate control.
        
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Re: MC6566 Equivalent WITHOUT Hysteresis
On Sat, 08 Jul 2017 15:54:03 -0700, Jim Thompson

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Making a slew-rate limiter? That's always fun.


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John Larkin         Highland Technology, Inc

lunatic fringe electronics  


Re: MC6566 Equivalent WITHOUT Hysteresis
On Sat, 08 Jul 2017 08:16:07 -0700, Jim Thompson wrote:

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Jesus, Jim, you're an IC designer.  Isn't there something like OshPark  
for ICs yet?

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Tim Wescott
Wescott Design Services
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Re: MC6566 Equivalent WITHOUT Hysteresis
On Sat, 08 Jul 2017 20:17:43 -0500, Tim Wescott

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I could whip up a chip design in minutes... it'd just cost me probably
$10K minimum just to run it thru MOSIS :-(

This is for a massive run of eight systems ;-)
        
                                        ...Jim Thompson
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Re: MC6566 Equivalent WITHOUT Hysteresis
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Wouldn't it be great if there were an IC proto service, even if it were  
super shitty (10um+ feature size?), that was as cheap as PCBs are*?

*For the same number of pixels being rendered, say.  A 10x10 cm PCB is a  
typical cheap proto.  An IC a few mm across might have as many pixels.

Tim

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Seven Transistor Labs, LLC
Electrical Engineering Consultation and Contract Design
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