LT1031/LH0070 Precision 10V Reference UFEATURESDESCRIPTIO ■ Pin Compatible with LH0070 and AD581* The LT®1031 is a precision 10V reference with ultralow ■ Ultralow Drift—5ppm/°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 < 1ppmP-P 0.1Hz to 10Hz the same precision characteristics as the three terminal ■ > 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. UTYPICAL APPLICATIOBasic Positive andDistribution of Output AccuracyNegative Connections 40 TA = 25°C 35 DISTRIBUTION FROM 5 RUNS LT1031 LT1031 30 VIN IN OUT VOUT OUT 25 GND GND 20 15 – VOUT PERCENT OF UNITS (%) V 10 IN – VOUT R1 = R1 ILOAD + 1.5mA 5 – VIN LT1031 • TA01 0 –0.10 –0.06 –0.02 0 0.02 0.06 0.10 OUTPUT ACCURACY (%) LT1031 TA02 1031fb 1
