ADR293TERMINOLOGY Line RegulationTemperature Coefficient The change in output voltage due to a specified change in input The change of output voltage over the operating temperature voltage. It includes the effects of self-heating. Line regulation is change and normalized by the output voltage at 25°C, expressed expressed in percent per volt, parts per million per volt, or in ppm/°C. microvolts per volt change in input voltage. TCV [ V Τ − V T ppm/ ° C] ( ) ( ) OUT 2 OUT 1 6 = × 10 Load Regulation OUT V (25°C) × (T ) − T OUT 2 1 The change in output voltage due to a specified change in load current. It includes the effects of self-heating. Load regulation is where: expressed in microvolts per milliampere, parts per million per VOUT (25°C) = VOUT at 25°C. milliampere, or ohms of dc output resistance. VOUT (T1) = VOUT at Temperature 1. VOUT (T2) = VOUT at Temperature 2. Long-Term Stability Typical shift of output voltage of 25°C on a sample of parts Thermal Hysteresis subjected to high temperature operating life test of 1000 hours Thermal hysteresis is defined as the change of output voltage at 125°C. after the device is cycled through temperatures from +25°C to Δ –40°C to +85°C and back to +25°C. This is a typical value from V = V (t ) − V (t ) OUT OUT 0 OUT 1 a sample of parts put through such a cycle. Δ V = V (25 C ° ) V [ V t − V t ppm] ( OUT 0 ) ( ) OUT 1 6 = − V OUT −HYS OUT OUT TC − OUT V (t OUT 0 ) × 10 V 25 C V V OUT OUT TC OUT − [ ° − ppm] ( ) 6 = − × where: HYS V (25°C) 10 V OUT OUT (t0) = VOUT at 25°C at time 0. V where: OUT (t1) = VOUT at 25°C after 1000 hours operation at 125°C. V NC = No Connect OUT (25°C) = VOUT at 25°C. V There are in fact connections at NC pins, which are reserved for OUT-TC = VOUT (25°C) after temperature cycle at +25°C to –40°C to +85°C and back to +25°C. manufacturing purposes. Users should not connect anything at NC pins. Rev. D | Page 9 of 12 Document Outline FEATURES APPLICATIONS PIN CONFIGURATIONS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ELECTRICAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION DEVICE POWER DISSIPATION CONSIDERATIONS BASIC VOLTAGE REFERENCE CONNECTIONS NOISE PERFORMANCE TURN-ON TIME APPLICATIONS KELVIN CONNECTIONS VOLTAGE REGULATOR FOR PORTABLE EQUIPMENT OUTLINE DIMENSIONS ORDERING GUIDE
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