ACPL-790 high-precision analog voltage/current signal isolation module ± 5V ± 5A/200KHz bandwidth

Parameters
Onboard SEPIC DC-DC converter, supporting wide power supply voltage (3.0V-9V DC).
The minimum isolation voltage between channels is 2500Vdc, and the minimum isolation voltage between input and output is 2500Vdc.
The typical value of output offset voltage is 4.8mV.
± 5A to 0-5V or ± 5V to 0-5V (Gain=0.3979).
External input reference level, which can be adjusted for different acquisition systems.
When powered by 3.3VDC, the operating current is 82mA, and when powered by 5.0VDC, the operating current is 55mA.
Support the collection of forward and reverse current/voltage signals.
The simulated bandwidth is 200KHz.
Q: How to configure the use of STM32 internal ADC to collect positive and negative currents?
Answer: Method 1: Please provide a 1.65V reference level for the "VREF" interface, or change the reference voltage divider resistor to make the VREF 1/2 power supply, in order to obtain the maximum positive and negative linear region (see module manual for details). Method 2: Change U2 bit 3.3V LDO (default to 5V LDO).