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ADR290GT9 Scheda tecnica(PDF) 6 Page - Analog Devices |
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ADR290GT9 Scheda tecnica(HTML) 6 Page - Analog Devices |
6 / 15 page REV. B ADR290/ADR291/ADR292 –6– PARAMETER DEFINITION Line Regulation The change in output voltage due to a specified change in input voltage. It includes the effects of self-heating. Line regulation is expressed in either percent-per-volt, parts-per-million-per- volt, or microvolts-per-volt change in input voltage. Load Regulation The change in output voltage due to a specified change in load current. It includes the effects of self-heating. Load regulation is expressed in either microvolts-per-milliampere, parts-per- million-per-milliampere, or ohms of dc output resistance. Long-Term Stability Typical shift of output voltage at 25 °C on a sample of parts subjected to high-temperature operating life test of 1000 hours at 125 °C. ∆ ∆ VV t V t V ppm Vt Vt Vt OO O OO O = × () – () = () – () () 0O 1 01 0 [] 10 6 Where VO (t0 ) = VO at 25 °C at time 0 VO (t1 ) = VO at 25 °C after 1000 hours operation at 125°C Temperature Coefficient The change of output voltage over the operating temperature change and normalized by the output voltage at 25 °C, expressed in ppm/ °C. The equation follows: TCV ppm C VT VT VC T T O OO O [/ ] () – () () ( – ) °= °× × 21 21 6 25 10 Where VO (25 °C) = VO at 25°C VO(T1) = VO at Temperature 1 VO(T2) = VO at Temperature 2 NC = No Connect (There are in fact internal connections at NC pins which are reserved for manufacturing purposes. Users should not connect anything at NC pins.) Thermal Hysteresis Thermal hysteresis is defined as the change of output voltage af- ter the device is cycled through temperature from +25 °C to –40 °C to +85°C and back to +25°C. This is a typical value from a sample of parts put through such a cycle. VV C V V ppm VC V VC O HYS O O TC O HYS OO TC O – _ – _ () – [] () – () =° = ° ° × 25 25 25 10 6 Where VO (25 °C) = VO at 25°C VO–TC = VO at 25 °C after temperature cycle at +25°C to –40 °C to +85°C and back to +25°C |
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