DatasheetsPDF.com

AN239

Silicon
Part Number AN239
Manufacturer Silicon
Description Expanding ADC1 Dyanmic Range
Published Nov 27, 2007
Detailed Description www.DataSheet4U.com AN239 E X PA N D I N G ADC1 D Y N A M I C R A N G E F O R T H E Si8250 1. Introduction The Si8250 ...
Datasheet PDF File AN239 PDF File

AN239
AN239

Overview
www.
DataSheet4U.
com AN239 E X PA N D I N G ADC1 D Y N A M I C R A N G E F O R T H E Si8250 1.
Introduction The Si8250 data sheet specifies a common mode input range of 0.
6 to 1.
2 V for ADC1.
This range effectively limits the dynamic voltage output range in voltage-controlled converters.
For example, the output range for a 3.
3 V power supply designed to generate a 1.
00 V sense would have an absolute maximum dynamic range of 1.
98 to 3.
96 V.
In reality, the active regulation point would need to be something greater than 1.
98 V and less than 3.
96 V since these are on the very fringes of the common mode specification.
If a design requires wider dynamic output voltage range (e.
g.
, 2.
00–5.
70 V) then a simple resistor divider will not work.
This application note discusses a simple and inexpensive solution to expand the dynamic range for applications such as power factor correction and wide variable output power supplies.
2.
ADC1 Common Mode Limits The specified common mode range for ADC1 (F...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)