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Long-Term Output Stability of an LDX-3525B

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Long-Term Output Stability of an LDX-3525B

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This technical note presents the results of output drift measurement performed on a typical production model LDX-3525B Precision Current SourceThe measurement setup is shown in Figure 1. The LDX-3525B was placed in a temperature controlled oven and stabilized for one hour at 20o C. The LDX-3525B was placed in low (200 mA) range, and the output current was set to 100 mA. Current measurements were taken every two minutes by measuring the voltage across an ultra-stable precision resistor which was also temperature controlled. Raw data was fed to a computer and converted to drift data in parts per million (ppm).

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