low noise op amp suggestion for monitoring

Adam Daluga

Other Parts Discussed in Thread: OPA991, OPA2991, TLV9154, OPA4991, TLV9152

Hi,

I am wondering if you can help me find an op amp for a monitoring circuit I am working on. I have several voltages that I need to monitor that represent various points of telemetry in our system. I have a +-12V supply available, but need to monitor voltages from 0-10V. Do you have a low noise, rail-to-rail In & Out, op amp that fits my requirements? Industrial temp ranges would be a plus!

Thanks,

Adam

over 3 years ago

0 Jerry Madalvanos over 3 years ago

TI__Mastermind 25241 points

Hey Adam,

If you're looking for something that can handle +-12V, and is RRIO, our lowest noise offering is OPAX991. Vn at 1kHz is 10nV/rtHz, and temp range is -40 to 125.

If you just wanted to do single supply 12V and wanted RRIO, OPAX991 is still our lowest noise offering, along with TLV9152. Depending on how many channels you need, you may use the OPA991, OPA2991, OPA4991 for 1, 2 and 4 channels respectively. (For tlv series we offer TLV9152 and TLV9154 for dual and quad channel packages respectively).

Here is the link to my search in case you would like to tweak the parameters: https://www.ti.com/amplifier-circuit/op-amps/general-purpose/products.html#~p78=In;Out&p1261max=12;48&p1261min=0.9;12&sort=p7typ;asc

Best,
Jerry

0 kai klaas69 over 3 years ago

Guru 140200 points

Hi Adam,

what are the exact voltages you want to monitor? And why do you need a low noise OPAmp for this purpose?

Kai

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low noise op amp suggestion for monitoring