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LM199 Folha de dados(PDF) 3 Page - Linear Technology |
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LM199 Folha de dados(HTML) 3 Page - Linear Technology |
3 / 8 page LM199/LM399 LM199A/LM399A 3 199399fc For more information www.linear.com/LM399 Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The substrate is electrically connected to the negative terminal of the temperature stabilizer. The voltage that can be applied to either terminal of the reference is 40V more positive or 0.1V more negative than the substrate. Note 3: These specifications apply for 30V applied to the temperature stabilizer and –55°C ≤ TA ≤ 125°C for the LM199; and 0°C ≤ TA ≤ 70°C for the LM399. Note 4: Devices with maximum guaranteed long-term stability of 20ppm/√kH are available. Drift decreases with time. Note 5: This initial current can be reduced by adding an appropriate resistor and capacitor to the heater circuit. See the Typical Performance Characteristics graphs to determine values. Note 6: Guaranteed by “Reverse Breakdown Change with Current.” elecTrical characTerisTics Typical perForMance characTerisTics LM199/LM199A LM399/LM399A SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS ΔVZ ΔTime Long-Term Stability Stabilized, 22°C ≤ TA ≤ 28°C, 1000 Hours, IR = 1mA ±0.1% 8 (Note 4) 8 (Note 4) ppm/√kH IH Temperature Stabilizer Supply Current TA = 25°C, Still Air, VH = 30V TA = –55°C (Note 5) 8.5 22 14 28 8.5 15 mA VH Temperature Stabilizer Supply Voltage l 9 40 9 40 V Warm-Up Time to ±0.05% VZ VH = 30V 3 3 Seconds Initial Turn-On Current 9V ≤ VH ≤ 40V (Note 5) 140 200 140 200 mA The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) Reverse Characteristics Dynamic Impedance Stabilization Time REVERSE VOLTAGE (V) 6.25 0.01 0.1 1 10 100 6.45 6.65 LM199 G01 6.85 7.05 TJ = 25°C STABILIZED (TJ ≈ 90°C) FREQUENCY (Hz) 10 0.1 10 100 100 1k 10k 100k LM199 G02 1 TJ = 25°C STABILIZED (TJ ≈ 90°C) HEATER ON TIME (SECONDS) 0 –1 0 1 16 LM199 G03 –2 –3 –4 4 8 12 20 TA = 25°C VH = 15V TA = –55°C |
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