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Original question:

OPA2188 vs OPA4188 and OPA188

OPA2188: OPA4188 alternatives

Joe Nguyen1
Prodigy 60 points
Part Number: OPA2188
Other Parts Discussed in Thread: OPA188, OPA4188, , OPA2182, OPA2187

We have a legacy design that uses the OPA4188.  Only 2 of the 4 opamps are used.  Due to part shortages, we are considering replacing the OPA4188 with the OPA2188.  The specs look almost identical for Vs = +/-5V.  I did see that the specified temperature range was different 125C (OPA4188) and 105C (OPA2188).  The OPA2188 revision history deleted all references to the OPA188 and OPA4188 so I'm unclear if these are the same family of parts or if they can be used as alternatives to each other.  Is there anything else I need to take into consideration?  

  • 0
    TI__Guru 63580 points

    Yes, OPAx188 family includes OPA188 (single), OPA2188 (dual) and OPA4188 (quad) - they are all the same parts but over temp spec may be different. However, if you are considering switching to a dual, you might also consider newer parts, like OPA2182 and OPA2187, which are specified from -40C to 125C.