OPA2310: Absolute Maximum Supply Voltage Discrepancy

Bradley Dimond

Part Number: OPA2310

For the OPA2310, in datasheet section 7.1 the absolute maximum supply voltage [ Vs = (V+) - (V-) ] is listed as 7V. However, later in datasheet section 9.3 a caution box suggests that supply voltages larger than 6V can permanently damage the device.

Now, I have seen this same caution box in similar TI chip datasheets, so maybe it is a copy paste error. Or could the 7V absolute maximum be an error? I am hoping a TI expert could help sort this out.

For more context, we are hoping to use the OPA2310 running with a 6V supply voltage (+3V and -3V). Yes the recommended limit is 5.5V, but we have struggled to find a component that meets a demanding list of constraints. If the OPA2310 can safely run at 6V, below an absolute limit of 7V, then we are in the clear. (Our signal pin voltages are much lower; no other absolute maximum rating is a problem)

Thanks for your time.

9 months ago

0 Ron Michallick 9 months ago

TI__Guru*** 145766 points

Hello Bradley,

The absolute maximum rating table of 7V would imply unacceptable risk to all applications. The recommended 5.5V would imply acceptable risk for all applications. 6V applications would assume some level of risk. How much risk depends partly on the quality of the 6V supply; it's tolerance ; its ability to over / under shoot.

Also note that electrically table characteristics end at 5.5V supply. Normal extrapolation of characteristics is expected (not but tested) between 5.5V and 6V.

In summary, 6V is possible with careful usage (quality power source) and acceptance of increased risk.

0 Bradley Dimond 9 months ago in reply to Ron Michallick

Prodigy 10 points

Sorry, I should clarify the core of my question better (though the above is still helpful!):

The caution box in Section 9.3 implies the absolute maximum supply voltage should be 6V, but it is listed as 7V in the absolute maximum ratings Section 7.1. Which is correct, 6V or 7V?

A comparison: the TLV342IDR has a similar caution box (Section 9), but it has an identical maximum supply voltage in the limits (Section 6.1). It is 5.5V in both cases!

0 Ron Michallick 9 months ago in reply to Bradley Dimond

TI__Guru*** 145766 points

Bradley,

I believe 7V is correct. I have asked internally to make sure I am correct.

+1 Ron Michallick 9 months ago in reply to Ron Michallick

TI__Guru*** 145766 points

Bradley,

7V has been verified as correct. Changes to section 9.3 are in work.

0 Bradley Dimond 9 months ago in reply to Ron Michallick

Prodigy 10 points

Thanks for confirming!

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OPA2310: Absolute Maximum Supply Voltage Discrepancy