A/D converter
in [Design]
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From: Palinurus on 9 Apr 2008 06:21 I'm looking for a sigma delta 3.5 digit display-type A/D converter with display hold and on-chip LED drivers. Something like the MAX1496EPI seems nearly ideal, but I can't find a vendor for it, and am hesitant to commit to a part which may not be available in small quantities later. The alternative, I suppose, is to use a dual-slope converter like the ICL7135, and just bite the bullet as regards board real estate and other problems.
From: David L. Jones on 9 Apr 2008 07:55 "Palinurus" <disscourn(a)oplink.net> wrote in message news:lfWdnYpVwbZbBWHanZ2dnUVZ_gmdnZ2d(a)oplink... > I'm looking for a sigma delta 3.5 digit display-type A/D converter with > display hold and on-chip LED drivers. Something like the MAX1496EPI seems > nearly ideal, but I can't find a vendor for it, and am hesitant to commit > to a part which may not be available in small quantities later. The > alternative, I suppose, is to use a dual-slope converter like the ICL7135, > and just bite the bullet as regards board real estate and other problems. Maxim sell the chip direct on their website in small QTY, and have stock. Digikey and Newark have it listed, but no stock. Dave.
From: John Fields on 9 Apr 2008 08:05 On Wed, 09 Apr 2008 05:21:57 -0500, Palinurus <disscourn(a)oplink.net> wrote: >I'm looking for a sigma delta 3.5 digit display-type A/D converter with >display hold and on-chip LED drivers. Something like the MAX1496EPI >seems nearly ideal, but I can't find a vendor for it, and am hesitant to >commit to a part which may not be available in small quantities later. >The alternative, I suppose, is to use a dual-slope converter like the >ICL7135, and just bite the bullet as regards board real estate and other >problems. --- Maxim makes an ICL7135 in a SSOP package http://pdfserv.maxim-ic.com/package_dwgs/21-0056.PDF but they're a little pricey: https://shop.maxim-ic.com/storefront/priceavailable.do?Partnumber=ICL7135CAI&event=PartSearch&menuitem=PriceAndAvailability JF
From: GPG on 9 Apr 2008 08:29 On Apr 10, 12:05 am, John Fields <jfie...(a)austininstruments.com> wrote: > On Wed, 09 Apr 2008 05:21:57 -0500, Palinurus <dissco...(a)oplink.net> > wrote: > > >I'm looking for a sigma delta 3.5 digit display-type A/D converter with > >display hold and on-chip LED drivers. Something like the MAX1496EPI > >seems nearly ideal, but I can't find a vendor for it, and am hesitant to > >commit to a part which may not be available in small quantities later. > >The alternative, I suppose, is to use a dual-slope converter like the > >ICL7135, and just bite the bullet as regards board real estate and other > >problems. > > --- > Maxim makes an ICL7135 in a SSOP package > > http://pdfserv.maxim-ic.com/package_dwgs/21-0056.PDF > > but they're a little pricey: > > https://shop.maxim-ic.com/storefront/priceavailable.do?Partnumber=ICL... > > JF http://www.intersil.com/data/fn/fn3082.pdf
From: Palinurus on 9 Apr 2008 11:12
GPG wrote: > > > http://www.intersil.com/data/fn/fn3082.pdf > - The 7107 has no provision for display hold. The 7117 does, but is hard to find these days, and will become more so. As to the MAX1496, they apparently have a stock of around 100, and once those are gone, it will be more than 6 months before they crank out another batch. Obviously not a hot seller, so maybe a prime candidate for obsolescence. |