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MC6566 Equivalent WITHOUT Hysteresis

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

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| 1962 |

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

Thinking outside the box... producing elegant solutions.

Reply to
Jim Thompson
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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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This email has been checked for viruses by AVG. 
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Reply to
Piglet

I think this FAN156 is a closer match:

Reply to
bitrex

Nevermind, it's got internal hysteresis too! I don't see it on the diagram though...

Reply to
bitrex

Umm, why?

--

John Larkin         Highland Technology, Inc 

lunatic fringe electronics
Reply to
John Larkin

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

formatting link
| 1962 |

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

Thinking outside the box... producing elegant solutions.

Reply to
Jim Thompson

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.
Reply to
Jim Thompson

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

--

John Larkin         Highland Technology, Inc 

lunatic fringe electronics
Reply to
John Larkin

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
Reply to
Tim Wescott

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.
Reply to
Jim Thompson

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

Cheers

Reply to
Martin Riddle

"Jim Thompson" wrote in message news: snipped-for-privacy@4ax.com...

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

--
Seven Transistor Labs, LLC 
Electrical Engineering Consultation and Contract Design 
Website: http://seventransistorlabs.com
Reply to
Tim Williams

The original comparator has like 3mV of hysteresis at 1.6 volts. Trying to make a silk purse out of a sow's ear anyway. Just use the "op amp" in inverting feedback configuration it'll probably work fine-ish.

Reply to
bitrex

Can't find it. Link? Isn't that a variant of the oldie 139/239/339? ...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.
Reply to
Jim Thompson

Don't we wish! ;-) ...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.
Reply to
Jim Thompson

But its a 5v part :(

Cheers

Reply to
Martin Riddle

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.

Reply to
Steve Wilson

Strange numbering! Schematic somewhat resembles the LM311. ...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.
Reply to
Jim Thompson

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

Cheers

Reply to
Martin Riddle

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

Reply to
Martin Riddle

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