Datasheet ADR512W (Analog Devices) - 7

ADR512W TERMINOLOGY Temperature Coefficient Thermal Hysteresis
Temperature coefficient is the change in output voltage with Thermal hysteresis is defined as the change in output voltage respect to operating temperature changes, normalized by the after the device is cycled through temperature from +25°C to output voltage at 25°C. This parameter is expressed in ppm/°C −40°C to +85°C and back to +25°C. This is a typical value from and can be determined with the fol owing equation: a sample of parts put through such a cycle.  ppm V V = V (25°C) − V O (T − V T 2 ) O ( 1 ) 6 TCV = (1) O _ HYS O O _ TC O    °C  V V °C − O ( °C) × ( ×10 25 T − T 2 1 ) 25 (2) V ppm = V O O TC ×10 O _ HYS [ ] ( ) _ 6 where: VO (25°C) VO(25°C) = VO at 25°C. where: VO(T1) = VO at Temperature 1. V V O(25°C) = VO at 25°C. O(T2) = VO at Temperature 2. VO_TC = VO at 25°C after temperature cycles from +25°C to −40°C to +85°C and back to +25°C. Rev. 0 | Page 7 of 12 Document Outline Features Applications Pin Configuration General Description Revision History Specifications Electrical Characteristics Absolute Maximum Ratings Thermal Resistance ESD Caution Typical Performance Characteristics Terminology Applications Information Adjustable Precision Voltage Source Output Voltage Trim Using the ADR512W with Precision Data Converters Precise Negative Voltage Reference Outline Dimensions Ordering Guide Automotive Products