link to page 3 link to page 3 Data Sheet ADR1399SPECIFICATIONSELECTRICAL CHARACTERISTICS TA = 25°C, unless otherwise noted. Table 2.ParameterSymbolTest Conditions/CommentsMinTypMaxUnit ZENER REFERENCE VOLTAGE VZ 3 mA ≤ reference current (IREF) ≤ 13 mA 6.75 7.05 7.30 V CHANGE IN REFERENCE VOLTAGE WITH CURRENT ΔVZ 3 mA ≤ IREF ≤ 13 mA 0.4 0.8 mV DYNAMIC IMPEDANCE RZ 3 mA ≤ IREF ≤ 13 mA 0.04 0.08 Ω TEMPERATURE COEFFICIENT dV/dT IREF = 3 mA, heater voltage (VH) = 30 V, TA = 0 to 70°C 0.2 11 ppm/°C REFERENCE NOISE eN p-p IREF = 3 mA, 0.1 Hz < f < 10 Hz 0.2 ppm p-p IREF = 3 mA, 0.1 Hz < f < 10 Hz 1.44 µV p-p eN rms 10 Hz < f < 1 kHz 1.84 µV rms eN IREF = 3 mA Frequency = 0.1 Hz 200 nV/√Hz Frequency = 10 Hz 65 nV/√Hz Frequency = 1 kHz 58 nV/√Hz LONG-TERM STABILITY dVZ /dt VH = 30 V, 22°C ≤ TA ≤ 28°C, 1000 Hrs, IREF = 3 mA 7 ppm/√kHr HEATER SUPPLY CURRENT, STILL AIR2 IH TA = 25°C, VH = 30 V, IREF = 3 mA 8.5 15 mA TA = –55°C 21 28 mA HEATER START-UP CURRENT IHS VH = 9.5 V to 30 V 110 140 mA HEATER SUPPLY VOLTAGE VH 9.5 40 V WARM-UP TIME tHOT To ±0.05%, VH = 30 V 0.1 sec To ±20 ppm 1 sec To ±10 ppm 5 sec 1 Guarantee by design, not 100% production tested. 2 Guarantee correlated to moving air production test. analog.comRev. 0 | 3 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