REF5025: REF5025

neguse gebremikael

Part Number: REF5025
Other Parts Discussed in Thread: REF35

I am looking for a +/- 1.25V precision voltage reference solution for MCU. Does TI have an IC that will give you +1.25v and -1.25V precision voltage references?

over 2 years ago

0 Patrick Shalton over 2 years ago

TI__Mastermind 21325 points

Hi Neguse,

Do you have a preference of using either a series or shunt reference?

Thanks,

Patrick

0 Patrick Shalton over 2 years ago in reply to Patrick Shalton

TI__Mastermind 21325 points

Hi Neguse,

You can use the REF35125 as a precision (±0.05%) 1.25V reference. Please see Figure 10-1 on page 22 of the data sheet for a reference on how to create both +1.25V and -1.25V rails.

Thanks,

Patrick

0 neguse gebremikael over 2 years ago in reply to Patrick Shalton

Intellectual 800 points

Hi Patrick

I want to evaluate both a series and shunt reference.

Thank you.

Neguse

0 Patrick Shalton over 2 years ago in reply to neguse gebremikael

TI__Mastermind 21325 points

Hi Neguse,

Will the above solution work for your needs?

Thanks,
Patrick

0 neguse gebremikael over 2 years ago in reply to Patrick Shalton

Intellectual 800 points

Hi Patrick,

REF35125 , shows 0 qty available at both Digi-Key and mouser. Is this a new design? If possible, can you recommend both a series and shunt reference solution?

Thanks,

Neguse

+1 Patrick Shalton over 2 years ago in reply to neguse gebremikael

TI__Mastermind 21325 points

Hi Neguse,

Yes, the REF35125 is currently in preproduction.

If you need it sooner than that, please look at using the REF2025 or REF3312 and follow the same circuit as in the REF35 data sheet.

With a shunt reference, you can use the TLV431B and flip the circuit over ground (provide it with a negative reference).

Thanks,

Patrick

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REF5025: REF5025