LT1031/LH0070 Precision 10V Reference FEATURES DESCRIPTIO Pin Compatible with LH0070 and AD581* The LT 1031 is a precision 10V reference with ultralow Ultralow Drift5ppm/C Max Slope drift and noise, extremely good long term stability, and Trimmed Output Voltage almost total immunity to input voltage variations. The Operates in Series or Shunt Mode reference output will both source and sink up to 10mA and Output Sinks and Sources in Series Mode can be used as a shunt regulator (two terminal Zener) with Very Low Noise < 1ppm 0.1Hz to 10Hz the same precision characteristics as the three terminal P-P > 100dB Ripple Rejection connection. Special care has been taken to minimize Minimum Input Voltage of 11V thermal regulation effects and temperature induced hysteresis. U The LT1031 reference is based on a buried Zener diode APPLICATIO S structure which eliminates noise and stability problems A-to-D and D-to-A Converters associated with surface breakdown devices. Further, a Precision Regulators subsurface Zener exhibits better temperature drift and Digital Voltmeters time stability than even the best band-gap references. lnertial Navigation Systems Unique circuit design makes the LT1031 the first three Precision Scales terminal IC reference to offer ultralow drift without the Portable Reference Standard use of high power on-chip heaters. Output voltage is pretrimmed to 0.05% accuracy. The LT1031 can be used as a plug-in replacement for the AD581 and LH0070,* with improved electrical and thermal performance. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. *See LH0070 Electrical Characteristics table and AD581 cross reference guide. TYPICAL APPLICATIO Basic Positive and Distribution of Output Accuracy Negative Connections 40 T = 25C A DISTRIBUTION 35 FROM 5 RUNS LT1031 LT1031 30 V IN IN V OUT OUT OUT 25 GND 20 GND 15 V OUT 10 V V IN OUT R1 = R1 I + 1.5mA LOAD 5 V IN LT1031 TA01 0 0.06 0.02 0.02 0.10 0 0.06 0.10 OUTPUT ACCURACY (%) LT1031 TA02 1031fb 1 PERCENT OF UNITS (%) U ULT1031/LH0070 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) BOTTOM VIEW Input Voltage ........................................................... 40V INPUT Input-Output Voltage Differential ............................. 35V Output to Ground Voltage 1 (Shunt Mode Current Limit)................................. 16V 2 OUTPUT Trim Pin to Ground Voltage 3 Positive ................................................. Equal to V OUT GROUND Negative ............................................................. 20V H PACKAGE Output Short-Circuit Duration 3-LEAD TO-39 METAL CAN V = 35V ......................................................... 10 sec T = 150C, = 150C/W, = 45C/W (LH0070) IN JMAX JA JC T = 150C, = 150C/W, = 45C/W (LT1031M) JMAX JA JC V 20V ..................................................... Indefinite IN T = 85C, = 150C/W, = 45C/W (LT1031C) JMAX JA JC Operating Temperature Range ORDER PART NUMBER LT1031M .......................................... 55C to 125C LT1031C .................................................. 0C to 70C LH0070-0H LT1031BMH LT1031CCH Lead Temperature (Soldering, 10 sec).................. 300C LT1031DMH LT1031DCH LH0070-1H LH0070-2H LT1031BCH ELECTRICAL CHARACTERISTICS (LT1031) The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. V = 15V, I = 0, Mil or Comm version, unless noted. A IN OUT LT1031 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Output Voltage (Note 2) LT1031B 9.995 10.000 10.005 V R LT1031C 9.990 10.000 10.010 V LT1031D 9.980 10.000 10.020 V V Output Voltage Temperature T T T R MIN J MAX T Coefficient (Note 3) LT1031B 3 5 ppm/C LT1031C 6 15 ppm/C LT1031D 10 25 ppm/C V Line Regulation (Note 4) 11.5V V 14.5V 1 4 ppm/V R IN V 6 ppm/V IN 4.5V V 40V 0.5 2 ppm/V IN 4 ppm/V V Load Regulation (Sourcing Current) 0 I 10mA 12 25 ppm/mA R OUT I (Note 4) 40 ppm/mA O V Load Regulation (Shunt Mode) 1.7mA I 10mA 50 100 ppm/mA R SHUNT I (Notes 4, 5) 150 ppm/mA O I Series Mode Supply Current 1.2 1.7 mA Q 2.0 mA I Shunt Mode Minimum Current V is Open 1.1 1.5 mA MIN IN Output Short-Circuit Current 11V V 35V 30 mA IN Minimum Input Voltage (Note 7) l 1mA 10.8 11.0 V OUT e Output Voltage Noise 0.1Hz f 10Hz 6 V n P-P 10Hz f 10kHz 11 V RMS V Long Term Stability of t = 1000 Hrs 15 ppm R Time Output Voltage Non-Cumulative Temperature Hysteresis of Output T = 50C 5 ppm 1031fb 2 U WWW