Data Sheet ADR1399PIN CONFIGURATION AND FUNCTION DESCRIPTIONSFigure 2. Pin Configuration (The TO-46 Tab Is Indicated on the Plastic Enclosure by a Raised Ridge)Table 5. Pin Function DescriptionsPin No.MnemonicDescription 1 REF+ Positive Side of the Zener Reference (Typically with a Pull-Up Resistor to the Input Voltage (VIN)). 2 REF− Negative Side of the Zener Reference (Typically Grounded). 3 HEATER+ Positive Side of the Heater (Typically 15 V). 4 HEATER– Negative Side of the Heater (Typically Grounded or –15 V). Not applicable CASE CASE. Shorted to HEATER− at Pin 4. analog.comRev. 0 | 5 of 11 Document Outline Features Applications Pin Configuration General Description Specifications Electrical Characteristics Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Operating Set Temperature Thermal Resistance Applications Information Avoiding Thermocouple Errors Shunt Dynamic Impedance and Capacitive Load Typical Applications Outline Dimensions Ordering Guide