negative adjustable voltage regulator require for electro-chemistry sensor

Nirav Gadhiya

Other Parts Discussed in Thread: TPS723, LM137, LM317

Hello Friends,

I am working in the project of electro chemical potentiostat in which there are three electrodes used and I need to provide them very fine negative voltage from -1.0 to -0.6 with current range up to 100 mA.

Please suggest me the IC for same.

Thank you,

Nirav

over 8 years ago

0 Chris Glaser over 8 years ago

TI__Guru*** 142860 points

What is your input voltage?

0 Nirav Gadhiya over 8 years ago in reply to Chris Glaser

Prodigy 205 points

Input voltage is -5 V.

0 Nirav Gadhiya over 8 years ago in reply to Chris Glaser

Prodigy 205 points

also the output voltage must be very precise and accurate...

0 Chris Glaser over 8 years ago in reply to Nirav Gadhiya

TI__Guru*** 142860 points

Since you have a negative input voltage, a linear regulator is likely the easiest solution for you. Let me move this thread to their forum.

0 Ryan Eslinger over 8 years ago in reply to Chris Glaser

TI__Guru 55940 points

Hi Nirav,

Unfortunately, at this time the -1.2V is the closest to 0V that we offer regulation with negative LDOs such as TPS723.

Very Respectfully,
Ryan

0 Nirav Gadhiya over 8 years ago in reply to Ryan Eslinger

Prodigy 205 points

Dear Ryan,

In TPS723, output voltage is -1.2 to -10V but I have require exact range of -1 to -0.6 or more that that....

0 Kaisar Ali over 8 years ago

TI__Intellectual 2010 points

Hi Nirav,
The LM137/337 is currently the closest solution, but the negative adjustable voltage range is -1.20V to -37V. This device is available in multiple packages and current capabilities. We recently released the EVM on web wit LM317 (positive) regulator.

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negative adjustable voltage regulator require for electro-chemistry sensor