Forums

MC6566 Equivalent WITHOUT Hysteresis

Started by Jim Thompson July 8, 2017
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
-- 
| James E.Thompson                                 |    mens     |
| Analog Innovations                               |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |

             I'm looking for work... see my website.

     Thinking outside the box... producing elegant solutions.
On 08/07/2017 16:16, Jim Thompson wrote:
> 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 >
AZV331 ? Or if you want a real op-amp with totem pole output then the companion AZV831. piglet --- This email has been checked for viruses by AVG. http://www.avg.com
On 07/08/2017 11:33 AM, Piglet wrote:
> On 08/07/2017 16:16, Jim Thompson wrote: >> 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 >> > > AZV331 ? > > Or if you want a real op-amp with totem pole output then the companion > AZV831. > > piglet > > > > --- > This email has been checked for viruses by AVG. > http://www.avg.com >
I think this FAN156 is a closer match: <http://www.onsemi.com/pub/Collateral/FAN156.pdf.pdf>
On 07/08/2017 11:39 AM, bitrex wrote:
> On 07/08/2017 11:33 AM, Piglet wrote: >> On 08/07/2017 16:16, Jim Thompson wrote: >>> 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 >>> >> >> AZV331 ? >> >> Or if you want a real op-amp with totem pole output then the companion >> AZV831. >> >> piglet >> >> >> >> --- >> This email has been checked for viruses by AVG. >> http://www.avg.com >> > > I think this FAN156 is a closer match: > > <http://www.onsemi.com/pub/Collateral/FAN156.pdf.pdf>
Nevermind, it's got internal hysteresis too! I don't see it on the diagram though...
On Sat, 08 Jul 2017 08:16:07 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

>I have a situation, somewhat like Klaus', where I need to >(purposefully) use a comparator as a quasi-OpAmp.
Umm, why? -- John Larkin Highland Technology, Inc lunatic fringe electronics
On Sat, 08 Jul 2017 10:09:09 -0700, John Larkin
<jjlarkin@highlandtechnology.com> wrote:

>On Sat, 08 Jul 2017 08:16:07 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>I have a situation, somewhat like Klaus', where I need to >>(purposefully) use a comparator as a quasi-OpAmp. > > >Umm, why?
A special application slew rate control. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I'm looking for work... see my website. Thinking outside the box... producing elegant solutions.
On Sat, 8 Jul 2017 16:33:45 +0100, Piglet <erichpwagner@hotmail.com>
wrote:

>On 08/07/2017 16:16, Jim Thompson wrote: >> 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 >> > >AZV331 ? > >Or if you want a real op-amp with totem pole output then the companion >AZV831. > >piglet > >
MCP6566 is ~50ns part, 331's are in the 600ns and higher range. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I'm looking for work... see my website. Thinking outside the box... producing elegant solutions.
On Sat, 08 Jul 2017 15:54:03 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

>On Sat, 08 Jul 2017 10:09:09 -0700, John Larkin ><jjlarkin@highlandtechnology.com> wrote: > >>On Sat, 08 Jul 2017 08:16:07 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>I have a situation, somewhat like Klaus', where I need to >>>(purposefully) use a comparator as a quasi-OpAmp. >> >> >>Umm, why? > >A special application slew rate control. > > ...Jim Thompson
Making a slew-rate limiter? That's always fun. -- John Larkin Highland Technology, Inc lunatic fringe electronics
On Sat, 08 Jul 2017 08:16:07 -0700, Jim Thompson wrote:

> 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?
Jesus, Jim, you're an IC designer. Isn't there something like OshPark for ICs yet? -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
On Sat, 08 Jul 2017 20:17:43 -0500, Tim Wescott
<seemywebsite@myfooter.really> wrote:

>On Sat, 08 Jul 2017 08:16:07 -0700, Jim Thompson wrote: > >> 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? > >Jesus, Jim, you're an IC designer. Isn't there something like OshPark >for ICs yet?
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 -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I'm looking for work... see my website. Thinking outside the box... producing elegant solutions.