This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

OPA2990: SHDN Operation

Part Number: OPA2990


I'm writing to confirm the SHDN functionality and thresholds.    I believe that the SHDN function works like so:

  • SHDN
    • Logic LOW = (V-) to (V-) + 0.2V = Amplifier enabled
    • Logic HIGH = (V-) + 1.1V to (V-) + 20V= Amplifier disabled
      • edit: modified voltage thresholds.

This thread seems to confirm the logic LOW/HIGH functionality:


Moving forward, I'd like to point out the following in the datasheet.

1. Table 5-4 in the datasheet indicates that the original logic functionality is true.

2. Section 6.3 directly contradicts with Table 5-4 (and section with the statements in Table 5-4.

3. Section 7.3.1 agrees with Table 5-4, but the voltage thresholds differ from section 6.3.

Looking forward to a concise response.