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发表于 2020-2-13 20:04:55
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100sps有点低吧,ST的 X-NUCLEO-LPM01A功耗测量板的动态测量可以达到3.2Msamples/s,
电流从100 nA to 50 mA。
The X-NUCLEO-LPM01A expansion board has the following features:
•Data acquisition and data treatment unit: STM32L496VGT6 Ultra-low-power MCU with 80 MHz/100 DMIPS Arm® Cortex®-M4 core, 1 Mbyte of Flash memory, 320 Kbytes of SRAM, 3x 12-bit ADC at 5 Msamples/s, 2 x comparators
•Programmable voltage source from 1.8 V to 3.3 V
•Static current measurement from 1 nA to 200 mA
•Dynamic measurements:
–100 kHz bandwidth, 3.2 Msamples/s sampling rate
–Current from 100 nA to 50 mA
–Power measurement from 180 nW to 165 mW
–Energy measurement computation by power measurement time integration
关于这个动态电流测量,有两个疑问:
1、在板上没有看到继电器,想了解一下动态量程切换使用什么方式来实现呢?
2、红框中电路的作用不是很理解,望知道的大神指点指点。
这个图详见与下面的用户手册24页。
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