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Applications Overview
Monitoring Sleep and Standby Currents from Low Power Devices
Determining Device Power Consumption when Device Current is Drawn in Short Pulses
Series 2280S Precision Measurement Programmable DC Power Supplies
Application Overview:
Monitoring Sleep and Standby Currents from Low Power Devices
Measuring sleep mode and standby mode currents drawn by low power, portable devices such as consumer products (cellular phones,
tablets, laptops), industrial products (wireless transmitters, intrinsically safe instruments), and implantable medical devices (pacemakers,
defibrillators, neurological stimulators) is essential to ensure that critical power consumption specifications are met. These tests require
precise low current measurements down to microamp levels, which requires not only good measurement techniques but also sensitive
instrumentation with special capabilities for measuring very small load currents. However, specialized, sensitive instrumentation is costly
and adds more complexity to the test circuit. A readback power supply for both sourcing voltage and measuring current is one solution, but
most conventional programmable power supplies have a measuring resolution of only milliamps at best and, therefore, cannot be used for
low current measurements.
Unlike conventional power supplies, Keithley's Series 2280S Precision Measurement, Low Noise, Programmable DC Power Supplies
make digital multimeter- (DMM) quality measurements with up to 6