Hi Here are more details: I have 12 v supply and 10 v swing is enough. I don't want power(or expensive )opamps with a few ampere capabilty.I need only about 40 mA not more. Also I need to fit 5 outputs in a limited place on PCB. Inputs of amplifiers will be 8 bit D2A outs ,So 8 bit
resoulution should not be lost. I think my problem comes from fact that only opamps with Iout<10-15 mA have short circuit protection. After that you have to jump to power opamps which is Much more that needed. Am I right? Thanks Elbert and Declan Ali --- Declan Moriarty <[EMAIL PROTECTED]> wrote: > On Wed, Nov 05, 2003 at 09:44:19AM -0800, ali > marjovi enlightened us thusly > > Dear List > > I want to make an IO device with a few analog > outputs > > each one driving about 40 mA while short circuit > > protection is necessary.(at least when short to > Gnd ) > > > > Can any one suggest an opamp or a method? > > Thanks > > Ali > > Right - I'll have a go. > > If you start with an opamp o/p, there are power > opamps with all you > require. Presuming these are unsatiisfactory, and > you have a good > voltage overhead (I.E. your supplies are high and > you don't require all > the voltage swing available) you can make a > supertransistor > construcytion in class B to pull up and down. The > crossover is fairly > seamless, but not entirely. > > Nobody is going to think about this until we have a > lot more detail. How > precise? How big? What supplies in? etc. > -- > > With best Regards, > > > Declan Moriarty. > -- > Author: Declan Moriarty > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 > http://www.fatcity.com > San Diego, California -- Mailing list and web > hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an > E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of > 'ListGuru') and in > the message BODY, include a line containing: UNSUB > CHIPDIR-L > (or the name of mailing list you want to be removed > from). You may > also send the HELP command for other information > (like subscribing). -- Author: ali marjovi INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
