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Where to get a simple datasheet? for LMF90
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RobertMacy
Jan 27, 2014, 10:02:10 AM1/27/14
to
This is a simple switched capacitor filter made by National. Would
somebody send me a copy, or at least provide a URL that HAS it!!! and not
datasheet or alldata crap! If AppNote available that too please.
I just went through the most frustrating 45 minutes trying to get a simple
!@#$#@!#$ data sheet! Google search shows 8,000+ pages of either alldata,
or datasheet, ok so tried going to both, all I got there were ads for
unrelated chips and ?? couldn't even tell, kept asking me to download a
pdf viewer!! what?!
So thought I'd go to the source [which I usually do first] went to
<http://www.national.com> which of course took me to <http://www.ti.com>
because TI bought out National and TI's website is usually pretty easy to
navigate so did a search for LMF90 only to come up with nothing found.
I'd like a URL ending in .pdf so I can click on it and select 'download
the contents of the link', instead of going off to some jave infected
website that either hangs, delays, my system or wants to give me videos,
and no where in sight is a place to get a copy of the datasheet. Even the
'view' data sheet resulted in nothing happening!! arrrggg! ...temporary
end of rant.
So, anybody have a copy, or know a 'good' URL?
somebody send me a copy, or at least provide a URL that HAS it!!! and not
datasheet or alldata crap! If AppNote available that too please.
I just went through the most frustrating 45 minutes trying to get a simple
!@#$#@!#$ data sheet! Google search shows 8,000+ pages of either alldata,
or datasheet, ok so tried going to both, all I got there were ads for
unrelated chips and ?? couldn't even tell, kept asking me to download a
pdf viewer!! what?!
So thought I'd go to the source [which I usually do first] went to
<http://www.national.com> which of course took me to <http://www.ti.com>
because TI bought out National and TI's website is usually pretty easy to
navigate so did a search for LMF90 only to come up with nothing found.
I'd like a URL ending in .pdf so I can click on it and select 'download
the contents of the link', instead of going off to some jave infected
website that either hangs, delays, my system or wants to give me videos,
and no where in sight is a place to get a copy of the datasheet. Even the
'view' data sheet resulted in nothing happening!! arrrggg! ...temporary
end of rant.
So, anybody have a copy, or know a 'good' URL?
Michael Black
Jan 27, 2014, 10:18:27 AM1/27/14
to
On Mon, 27 Jan 2014, RobertMacy wrote:
> This is a simple switched capacitor filter made by National. Would somebody
> send me a copy, or at least provide a URL that HAS it!!! and not datasheet or
> alldata crap! If AppNote available that too please.
>
Have you got the part number right? National's first generation filter
> This is a simple switched capacitor filter made by National. Would somebody
> send me a copy, or at least provide a URL that HAS it!!! and not datasheet or
> alldata crap! If AppNote available that too please.
>
like that had some other prefix (I can't remember what, I'd know the minute I
saw it). I'm thinking "MFC" but I don't know why. It didn't start
with National's traditional prefix, "LM". Maybe later they used some other
prefix, but I'd double check.
Michael
Tauno Voipio
Jan 27, 2014, 10:26:10 AM1/27/14
to
RobertMacy
Jan 27, 2014, 10:30:47 AM1/27/14
to
On Mon, 27 Jan 2014 08:26:10 -0700, Tauno Voipio
<tauno....@notused.fi.invalid> wrote:
>> ...snip...
THANK YOU !!!!
At first I couldn't figure out the significance of the giant offer to
download a spec for a PIC, but below that was indeed a URL that yielded
the .pdf ending so I could download. Got it thanks
...now any AppNotes floating around?
<tauno....@notused.fi.invalid> wrote:
>> ...snip...
THANK YOU !!!!
At first I couldn't figure out the significance of the giant offer to
download a spec for a PIC, but below that was indeed a URL that yielded
the .pdf ending so I could download. Got it thanks
...now any AppNotes floating around?
John Larkin
Jan 27, 2014, 11:27:14 AM1/27/14
to
On Mon, 27 Jan 2014 10:18:27 -0500, Michael Black <et...@ncf.ca> wrote:
>On Mon, 27 Jan 2014, RobertMacy wrote:
>
>> This is a simple switched capacitor filter made by National. Would somebody
>> send me a copy, or at least provide a URL that HAS it!!! and not datasheet or
>> alldata crap! If AppNote available that too please.
>>
>Have you got the part number right? National's first generation filter
>like that had some other prefix (I can't remember what, I'd know the minute I
>saw it). I'm thinking "MFC" but I don't know why. It didn't start
>with National's traditional prefix, "LM". Maybe later they used some other
>prefix, but I'd double check.
National's classic switched-cap filter was the MF10, metal-gate CMOS. There was
>On Mon, 27 Jan 2014, RobertMacy wrote:
>
>> This is a simple switched capacitor filter made by National. Would somebody
>> send me a copy, or at least provide a URL that HAS it!!! and not datasheet or
>> alldata crap! If AppNote available that too please.
>>
>Have you got the part number right? National's first generation filter
>like that had some other prefix (I can't remember what, I'd know the minute I
>saw it). I'm thinking "MFC" but I don't know why. It didn't start
>with National's traditional prefix, "LM". Maybe later they used some other
>prefix, but I'd double check.
a later poly-gate version, can't remember the part number.
Overall, switched-cap filters weren't all that great. OK for some apps, but they
were really noisy, and aliased anything available, including power supply crud.
I once designed a double-conversion superhet FSK modem full of MF10s, for
Reuters' landline newswire service. Sold a few before PCs and the Internet made
the classic newswire thing obsolete.
--
John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
Precision electronic instrumentation
Phil Hobbs
Jan 27, 2014, 11:30:37 AM1/27/14
to
On 01/27/2014 11:27 AM, John Larkin wrote:
> On Mon, 27 Jan 2014 10:18:27 -0500, Michael Black <et...@ncf.ca> wrote:
>
>> On Mon, 27 Jan 2014, RobertMacy wrote:
>>
>>> This is a simple switched capacitor filter made by National. Would somebody
>>> send me a copy, or at least provide a URL that HAS it!!! and not datasheet or
>>> alldata crap! If AppNote available that too please.
>>>
>> Have you got the part number right? National's first generation filter
>> like that had some other prefix (I can't remember what, I'd know the minute I
>> saw it). I'm thinking "MFC" but I don't know why. It didn't start
>> with National's traditional prefix, "LM". Maybe later they used some other
>> prefix, but I'd double check.
>
> National's classic switched-cap filter was the MF10, metal-gate CMOS. There was
> a later poly-gate version, can't remember the part number.
>
The LMF100. Nice part if you needed to do anything fancy and low SNR
> On Mon, 27 Jan 2014 10:18:27 -0500, Michael Black <et...@ncf.ca> wrote:
>
>> On Mon, 27 Jan 2014, RobertMacy wrote:
>>
>>> This is a simple switched capacitor filter made by National. Would somebody
>>> send me a copy, or at least provide a URL that HAS it!!! and not datasheet or
>>> alldata crap! If AppNote available that too please.
>>>
>> Have you got the part number right? National's first generation filter
>> like that had some other prefix (I can't remember what, I'd know the minute I
>> saw it). I'm thinking "MFC" but I don't know why. It didn't start
>> with National's traditional prefix, "LM". Maybe later they used some other
>> prefix, but I'd double check.
>
> National's classic switched-cap filter was the MF10, metal-gate CMOS. There was
> a later poly-gate version, can't remember the part number.
>
was okay. I used it to make a SSB mixer once, and it worked great.
> Overall, switched-cap filters weren't all that great. OK for some apps, but they
> were really noisy, and aliased anything available, including power supply crud.
>
> I once designed a double-conversion superhet FSK modem full of MF10s, for
> Reuters' landline newswire service. Sold a few before PCs and the Internet made
> the classic newswire thing obsolete.
back when tight-tolerance capacitors were expensive.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
160 North State Road #203
Briarcliff Manor NY 10510
hobbs at electrooptical dot net
http://electrooptical.net
John Larkin
Jan 27, 2014, 11:39:12 AM1/27/14
to
On Mon, 27 Jan 2014 11:30:37 -0500, Phil Hobbs
<pcdhSpamM...@electrooptical.net> wrote:
>On 01/27/2014 11:27 AM, John Larkin wrote:
>> On Mon, 27 Jan 2014 10:18:27 -0500, Michael Black <et...@ncf.ca> wrote:
>>
>>> On Mon, 27 Jan 2014, RobertMacy wrote:
>>>
>>>> This is a simple switched capacitor filter made by National. Would somebody
>>>> send me a copy, or at least provide a URL that HAS it!!! and not datasheet or
>>>> alldata crap! If AppNote available that too please.
>>>>
>>> Have you got the part number right? National's first generation filter
>>> like that had some other prefix (I can't remember what, I'd know the minute I
>>> saw it). I'm thinking "MFC" but I don't know why. It didn't start
>>> with National's traditional prefix, "LM". Maybe later they used some other
>>> prefix, but I'd double check.
>>
>> National's classic switched-cap filter was the MF10, metal-gate CMOS. There was
>> a later poly-gate version, can't remember the part number.
>>
>
>The LMF100. Nice part if you needed to do anything fancy and low SNR
>was okay. I used it to make a SSB mixer once, and it worked great.
>
>> Overall, switched-cap filters weren't all that great. OK for some apps, but they
>> were really noisy, and aliased anything available, including power supply crud.
>>
>> I once designed a double-conversion superhet FSK modem full of MF10s, for
>> Reuters' landline newswire service. Sold a few before PCs and the Internet made
>> the classic newswire thing obsolete.
>
>The clock-tunable thing was pretty convenient for some jobs, especially
>back when tight-tolerance capacitors were expensive.
>
Yeah, the modem did any channel, and any one of three baud rate/bandwidths, with
<pcdhSpamM...@electrooptical.net> wrote:
>On 01/27/2014 11:27 AM, John Larkin wrote:
>> On Mon, 27 Jan 2014 10:18:27 -0500, Michael Black <et...@ncf.ca> wrote:
>>
>>> On Mon, 27 Jan 2014, RobertMacy wrote:
>>>
>>>> This is a simple switched capacitor filter made by National. Would somebody
>>>> send me a copy, or at least provide a URL that HAS it!!! and not datasheet or
>>>> alldata crap! If AppNote available that too please.
>>>>
>>> Have you got the part number right? National's first generation filter
>>> like that had some other prefix (I can't remember what, I'd know the minute I
>>> saw it). I'm thinking "MFC" but I don't know why. It didn't start
>>> with National's traditional prefix, "LM". Maybe later they used some other
>>> prefix, but I'd double check.
>>
>> National's classic switched-cap filter was the MF10, metal-gate CMOS. There was
>> a later poly-gate version, can't remember the part number.
>>
>
>The LMF100. Nice part if you needed to do anything fancy and low SNR
>was okay. I used it to make a SSB mixer once, and it worked great.
>
>> Overall, switched-cap filters weren't all that great. OK for some apps, but they
>> were really noisy, and aliased anything available, including power supply crud.
>>
>> I once designed a double-conversion superhet FSK modem full of MF10s, for
>> Reuters' landline newswire service. Sold a few before PCs and the Internet made
>> the classic newswire thing obsolete.
>
>The clock-tunable thing was pretty convenient for some jobs, especially
>back when tight-tolerance capacitors were expensive.
>
just dip switches. The older stuff had plug-in LC filters.
Phil Hobbs
Jan 27, 2014, 11:42:33 AM1/27/14
to
AN 779A. The old version is at
http://www.swarthmore.edu/NatSci/echeeve1/Ref/DataSheet/IntroToFilters.pdf
Phil Hobbs
Jan 27, 2014, 11:45:24 AM1/27/14
to
On 01/27/2014 10:02 AM, RobertMacy wrote:
http://www.datasheetarchive.com/dlmain/Datasheets-22/DSA-424155.pdf
Since the parasites have taken over the search engine ecosystem,
Datasheetarchive's built-in search works better than using Google to
search DSA.
Michael Black
Jan 27, 2014, 1:55:02 PM1/27/14
to
On Mon, 27 Jan 2014, John Larkin wrote:
> On Mon, 27 Jan 2014 10:18:27 -0500, Michael Black <et...@ncf.ca> wrote:
>
>> On Mon, 27 Jan 2014, RobertMacy wrote:
>>
>>> This is a simple switched capacitor filter made by National. Would somebody
>>> send me a copy, or at least provide a URL that HAS it!!! and not datasheet or
>>> alldata crap! If AppNote available that too please.
>>>
>> Have you got the part number right? National's first generation filter
>> like that had some other prefix (I can't remember what, I'd know the minute I
>> saw it). I'm thinking "MFC" but I don't know why. It didn't start
>> with National's traditional prefix, "LM". Maybe later they used some other
>> prefix, but I'd double check.
>
> National's classic switched-cap filter was the MF10, metal-gate CMOS. There was
> a later poly-gate version, can't remember the part number.
>
Yes, that's what I was remembering.
> On Mon, 27 Jan 2014 10:18:27 -0500, Michael Black <et...@ncf.ca> wrote:
>
>> On Mon, 27 Jan 2014, RobertMacy wrote:
>>
>>> This is a simple switched capacitor filter made by National. Would somebody
>>> send me a copy, or at least provide a URL that HAS it!!! and not datasheet or
>>> alldata crap! If AppNote available that too please.
>>>
>> Have you got the part number right? National's first generation filter
>> like that had some other prefix (I can't remember what, I'd know the minute I
>> saw it). I'm thinking "MFC" but I don't know why. It didn't start
>> with National's traditional prefix, "LM". Maybe later they used some other
>> prefix, but I'd double check.
>
> National's classic switched-cap filter was the MF10, metal-gate CMOS. There was
> a later poly-gate version, can't remember the part number.
>
> Overall, switched-cap filters weren't all that great. OK for some apps, but they
> were really noisy, and aliased anything available, including power supply crud.
>
lines. Fill in a gap, relatively late, that soon could be done by
converting to digital and doing the work there.
Michael
RobertMacy
Jan 28, 2014, 9:50:23 AM1/28/14
to
On Mon, 27 Jan 2014 09:39:12 -0700, John Larkin
<jjla...@highnotlandthistechnologypart.com> wrote:
> On Mon, 27 Jan 2014 11:30:37 -0500, Phil Hobbs
> <pcdhSpamM...@electrooptical.net> wrote:
>>> ...snip....
<jjla...@highnotlandthistechnologypart.com> wrote:
> On Mon, 27 Jan 2014 11:30:37 -0500, Phil Hobbs
> <pcdhSpamM...@electrooptical.net> wrote:
>> The clock-tunable thing was pretty convenient for some jobs, especially
>> back when tight-tolerance capacitors were expensive.
>>
>
> Yeah, the modem did any channel, and any one of three baud
> rate/bandwidths, with
> just dip switches. The older stuff had plug-in LC filters.
>
>
Actually, I only really needed the DataSheet and any AppNotes. but is ok,
>> back when tight-tolerance capacitors were expensive.
>>
>
> Yeah, the modem did any channel, and any one of three baud
> rate/bandwidths, with
> just dip switches. The older stuff had plug-in LC filters.
>
>
got the data sheet and an AppNote.
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