LTZ1000/LTZ1000A Ultra Precision Reference FeaTuresDescripTion n 1.2µVP-P Noise The LTZ1000 and LTZ1000A are ultra-stable temperature n 2µV/√kHr Long-Term Stability controllable references. They are designed to provide 7V n Very Low Hysteresis outputs with temperature drifts of 0.05ppm/°C, about n 0.05ppm/°C Drift 1.2µVP-P of noise and long-term stability of 2µV/√kHr. n Temperature Stabilized Included on the chip is a subsurface zener reference, a n 400°C/W Thermal Resistance for LTZ1000A Reduces heater resistor for temperature stabilization, and a tem- Insulation Requirements perature sensing transistor. External circuitry is used to n Specified for –55°C to 125°C Temperature Range set operating currents and to temperature stabilize the n Offered in TO-99 package reference. This allows maximum flexibility and best long- applicaTions term stability and noise. The LTZ1000 and LTZ1000A references can provide su- n Voltmeters perior performance to older devices such as the LM199, n Calibrators provided that the user implements the heater control and n Standard Cells properly manages the thermal layout. To simplify thermal n Scales insulation, the LTZ1000A uses a proprietary die attach n Low Noise RF Oscillators method to provide significantly higher thermal resistance than the LTZ1000. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical applicaTionLow Noise ReferenceLong-Term Stability 2 LTZ1000 VIN ≥ 10V OUTPUT 30k 1N4148 3 + 7 6 LT®1006 0 2 (ppm) – 4 120Ω 0.02µF –2 1000 TA01 0 10 20 30 DAYS LONG-TERM STABILITY OF A TYPICAL DEVICE FROM TIME = 0 WITH NO PRECONDITIONING OR AGING 1000 TA01b 1000afe For more information www.linear.com/LTZ1000 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Revision History Package Description Related Parts
