Hi,
customer use INA282 with VSSOP package in high precision battery test equipment,and have a problem about the output voltage. the schematic as below, current sense resistor is 0.01ohm.
During the battery charge and discharge, current has a large ripple, while the output voltage not follow the current change. It is a close loop in their project, ADC will sample INA282 output voltage as feedback to adjust current. It will be lost control if output voltage of INA282 not follow current change.
test result as below: green is current of sensing resistor, yellow is output voltage of INA282 and blue is the current of BTS output.
1. if we use INA282 with SOIC package, there's no this issue. what' the difference between SOIC and VSSOP?
2. we removed the R114,R116,C42 and C41, result is the same. Using a dryer to increase the temperature of INA282 or use FAN to cool down, the issue will be recurrent. is there any design consideration about temperature?
could you help on it? many thanks in advance.