/blogs_/archives/b/thesignal/posts/swinging-close-to-ground-single-supply-operationRail-to-rail amplifiers are able to produce output voltages very close to ground… but how close? We’re talking about CMOS op amps that are often used on low voltage designs when you are trying to maximize output voltage swing. Our specifications for theseen-USTelligent Community 13https://e2e.ti.com/blogs_/archives/b/thesignal/posts/swinging-close-to-ground-single-supply-operationThu, 12 Jul 2012 00:42:59 GMTcb01d8b2-d089-468d-babb-77d1d8683490:4b03d6da-188e-4541-8066-412b063d17f1Bruce Trump0<p>Thanks, Soufiane, the LM7705 is a really neat solution when you need to get accurately to 0V. It generates a small (approximately 0.25V) negative supply so you power the V- rail of an op amp.</p> <img src="https://e2e.ti.com/aggbug?PostID=663334&AppID=864&AppType=Weblog&ContentType=0" width="1" height="1">https://e2e.ti.com/blogs_/archives/b/thesignal/posts/swinging-close-to-ground-single-supply-operationWed, 11 Jul 2012 21:03:59 GMTcb01d8b2-d089-468d-babb-77d1d8683490:4b03d6da-188e-4541-8066-412b063d17f1Soufiane Bendaoud0<p>Hi Bruce:</p> <p>This can become a more serious problem in a two (or more) stage amplification as the saturated output of the first stage is multiplied by the gain of the second stage and so on. Perhaps is the easiest way to overcome this problem is to use the LM7705 negative bias generator, designed to work with virtually any single supply amplifier. In short, it can save the user several counts when trying to digitize a signal</p> <img src="https://e2e.ti.com/aggbug?PostID=663334&AppID=864&AppType=Weblog&ContentType=0" width="1" height="1">