LTZ1000CH#PBF

Overview

The LTZ1000CH#PBF is an ultra-stable, temperature-controllable voltage reference housed in an 8-lead TO-5 metal can package. It provides a nominal 7V output with a typical temperature drift of 0.05ppm/°C and long-term stability of 2µV/√kHr. The device integrates a subsurface zener reference, a heater resistor for thermal stabilization, and temperature sensing transistors. It operates within a specified temperature range of –55°C to 125°C and requires external circuitry to manage operating currents and maintain thermal equilibrium.

Feature Summary

• Integrates a subsurface zener reference, heater resistor, and temperature sensing transistor for high precision.
• Achieves ultra-low temperature drift of 0.05ppm/°C through active thermal stabilization.
• Features low noise performance with approximately 1.2µVP-P noise in the 0.1Hz to 10Hz band.
• Offers superior long-term stability of 2µV/√kHr compared to standard references.

Applications

• High-precision voltmeters
• Calibrators
• Standard cells
• Precision scales
• Low noise RF oscillators

Procurement Notes

Verify that the specific LTZ1000CH#PBF variant matches the required thermal resistance characteristics, as it differs from the LTZ1000ACH#PBF. Confirm that the application design includes adequate thermal insulation and proper lead matching to mitigate thermocouple effects. Ensure external control circuits are designed to handle the heater power requirements and maintain the necessary temperature margin above ambient conditions.

Selection Notes

Select this component when extreme stability and low noise are critical, surpassing the capabilities of devices like the LM199 or LT1021. Consider the complexity of the required external heater control and thermal management layout. Evaluate whether the TO-5 package constraints and the need for careful PCB trace equalization align with the system's physical and environmental design parameters.

Part Context

The LTZ1000 series represents Analog Devices' ultra-precision voltage reference technology, utilizing buried zener diodes for exceptional stability. The LTZ1000CH#PBF is part of the H8 package family, designed for applications demanding minimal drift over time and temperature. It serves as a benchmark for high-end instrumentation where standard references fail to meet stringent accuracy requirements.

Replacement Considerations

LTZ1000ACH#PBF