Other Parts Discussed in Thread: TMS320F28335, REF3020, REF3320
Hi, My customer is using REF3120 as the voltage reference of TMS320F28335. The final product is a solar inverter.
They observed around 1.99V instead of 2.048V for about 7-8 times. After they changed another one, the problem is fixed.
The problem is observed after the inverter is returned from the customer due to quality issue.
1. Are there anything improper of the schematic design of REF3120?
2. Are there any upgrade device of REF3120 recommended?
The schematic is as below:
5V source is from 12V through a buck as below: