LTZ1000A

Features n 1.2µVP-P Noise n 2µV/√kHr Long-Term Stability n Very Low Hysteresis n 0.05ppm/°C Drift n Temperature Stabilized n 400°C/W Thermal Resistance for LTZ1000A Reduces Insulation Requirements n Specified for –55°C to 125°C Temperature Range n Offered in TO-99 package Applications n Voltmeters n Calibrators n Standard Cells n Scales n Low Noise RF Oscillators LTZ1000/LTZ1000A Ultra Precision Reference Description The LTZ1000 and LTZ1000A are ultra-stable temperature controllable references. They are designed to provide 7V outputs with temperature drifts of 0.05ppm/°C, about 1.2µVP-P of noise and long-term stability of 2µV/√kHr. Included on the chip is a subsurface zener reference, a heater resistor for temperature stabilization, and a temperature sensing transistor. External circuitry is used to set operating currents and to temperature stabilize the reference. This allows maximum flexibility and best longterm stability and noise. The LTZ1000 and LTZ1000A r...