First, the application overview
Cell phones, PADs, portable sphygmomanometers, non-stop toll E-Cards, and car tire pressure monitoring devices are all powered by batteries. How to optimize the battery life of these devices, you first need to accurately measure their power consumption characteristics.
The following commonalities of these devices in power consumption characteristics present new challenges for power consumption testing:
High current measurement accuracy
– Micro-amplifier sleep current, even nA-level leakage current becomes a test need
Large range of dynamic current variation
– from microampere sleep current to ampere operating current
– Provides continuous, accurate measurements for different ranges of current
– Pulse width is narrow, typically in the order of hundreds of microseconds to milliseconds
Sampling rate and recording time
– faster sample rate, longer memory depth
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