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ADR293GRZ Fiches technique(PDF) 9 Page - Analog Devices |
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ADR293GRZ Fiches technique(HTML) 9 Page - Analog Devices |
9 / 12 page ADR293 Rev. D | Page 9 of 12 TERMINOLOGY 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 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 microvolts per milliampere, parts per million per milliampere, or ohms of dc output resistance. Long-Term Stability Typical shift of output voltage of 25°C on a sample of parts subjected to high temperature operating life test of 1000 hours at 125°C. ( ) () 1 OUT 0 OUT OUT t V t V V − = Δ [] () () () 6 10 ppm × − = Δ 0 OUT 1 OUT 0 OUT OUT t V t V t V V where: VOUT (t0) = VOUT at 25°C at time 0. VOUT (t1) = VOUT at 25°C after 1000 hours operation at 125°C. NC = No Connect There are in fact connections at NC pins, which are reserved for manufacturing purposes. Users should not connect anything at NC pins. 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. [] () ( ) () () 6 10 C ppm/ × − × ° − = ° 1 2 OUT 1 OUT 2 OUT OUT T T C 25 V T V Τ V V TC where: VOUT (25°C) = VOUT at 25°C. VOUT (T1) = VOUT at Temperature 1. VOUT (T2) = VOUT at Temperature 2. Thermal Hysteresis Thermal hysteresis is defined as the change of output voltage after the device is cycled through temperatures 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. ( ) TC OUT OUT HYS OUT V C 25 V V − − − ° = [] () () 6 10 ppm × ° − ° = − − C 25 V V C 25 V V OUT TC OUT OUT HYS OUT where: VOUT (25°C) = VOUT at 25°C. VOUT-TC = VOUT (25°C) after temperature cycle at +25°C to –40°C to +85°C and back to +25°C. |
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