OPA191: AEC-Q100 opamp equavalent to OPA191

David Fishman

Part Number: OPA191
Other Parts Discussed in Thread: OPA2192-Q1, OPA192-Q1, TLV197-Q1, OPA197-Q1, OPA333-Q1, TLE2021A-Q1

Is there an automotive qualified equavalent to the OPA-191?

11 months ago

0 Luis Chioye 11 months ago

TI__Guru 51826 points

HI David,

The most similar device to the OPA191 (2.5-MHz) in automotive grade is the OPA2192-Q1 (10-MHz). The OPAx192-Q1 is a 36-V Precision, Rail-to-Rail Input/Output, Low-Offset Voltage, Low-Input Bias Current Op Amp With e-trim. The OPAx192-Q1 offset accuracy specification is the same, but OPA192-Q1 offers higher unity gain bandwidth product of 10-MHz and higher slew rate, while OPA191 offers a lower bandwidth 2.5MHz. Here is a comparison between the OPA191 and OPA192-Q1:

https://www.ti.com/compare-products/?id=78&type=GPT&partList=OPA192-Q1,OPA191&columnList=3318,480,1261max,1261min,2max,23typ,2192,22typ,78,743typ,1typ,7typ,4typ,1498,1192,2954,2955,261011,1811,1130,-4

Among the automotive grade, the OPA192-Q1(10-MHz), OPA197-Q1 (10MHz) and TLV197-Q1 (10MHz) are similar automotive parts. The offset and offset drift specification is different between them. Below is a comparison between the OPA192-Q1, OPA197-Q1 and TLV197-Q1:

https://www.ti.com/compare-products/?id=78&type=GPT&partList=TLV197-Q1,OPA197-Q1,OPA192-Q1&columnList=3318,480,1261max,1261min,2max,23typ,2192,22typ,78,743typ,1typ,7typ,4typ,1498,1192,2954,2955,261011,1811,1130,-4

Thank you and Regards,

Luis

0 David Fishman 11 months ago

Intellectual 455 points

Hello Luis.

Thanks for your suggestions. I should have mentioned that power supply current is also a critical parameter. The OPAx191 has a 140uA per amplifier spec. I can a go a little higher, but not much.

thanks, dave

0 Luis Chioye 11 months ago in reply to David Fishman

TI__Guru 51826 points

HI Dave,

Unfortunately, I don' have an exact OPAx191 precision amplifier equivalent on automotive grade. The OPAx192-Q1 is the closest, but it is a higher bandwidth with a higher quiescent current.

Among precision amplifiers (Vos<1mV) with current consumption less than 200uA, the TLE2021A-Q1 supports supply rails in the range of 40V to 4V, consuming 35uA, with 1.7MHz, but it is not rail-to-rail, and offset is larger that OPAx191. We also offer the OPA333-Q1, OPAx317-Q1, rail-to-rail, high precision, zero-drift (chopper) amplifiers, GBW is lower at 300-kHz and these support a maximum supply of 5.5V.

Below is the list of Precision Amplifier Automotive grade (Vos<1mV) with quiescent current less than <200uA:

https://www.ti.com/amplifier-circuit/op-amps/precision/products.html#1498=Automotive&1typ=0.000425%3B0.2&

Among General Purpose Amplifiers, here is a list of automotive grade, consuming less than 200uA. These will be higher offset/offset drift than the OPAx191:

https://www.ti.com/amplifier-circuit/op-amps/general-purpose/products.html#1498=Automotive&1typ=0.00032%3B0.2&sort=1261max;desc&

Thank you and Regards,

Luis

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OPA191: AEC-Q100 opamp equavalent to OPA191