Charge Sensitive Preamlifier

Aimen Barraj

Prodigy 230 points

Other Parts Discussed in Thread: OPA827, TINA-TI

Hi,

I have a Projekt to develope a charge sensitive Amplifier. Which Type of Amplifier shuld I use?

Thank you

Aimen

over 12 years ago

0 Loren Siebert 1 over 12 years ago

TI__Genius 13935 points

Hi Aimen,

I am not sure what you mean by charge sensitive amplifier. If you are looking to detect a voltage from an accumulated charge on a detector of some sort I think you would want a very high input impedance amplifier with very low bias currents. In this case an OPA827 Low-Noise, High-Precision JFET input op amp may be a good option.

Our selector guide has other low bias current amplifiers as well:

http://www.ti.com/lsds/ti/amplifiers-linear/low-input-bias-current-amp-less-than-equal-10pa-products.page

Regards,

Loren

0 Aimen Barraj over 12 years ago in reply to Loren Siebert 1

Prodigy 230 points

Thank you for your help

0 Aimen Barraj over 12 years ago in reply to Aimen Barraj

Prodigy 230 points

so my Sensor Signal is 200 nA and 1 us width. Wich OPV shuld I use to convert the Signal in Voltage

Thank you

0 Loren Siebert 1 over 12 years ago in reply to Aimen Barraj

TI__Genius 13935 points

I would start with the OPA827.

If you have not already done so I would recommend you download the TINA-TI program that is available on the TI website. It has a SPICE macro model for the OPA827 included and you can try some designs with it. I use this program myself when designing PC boards or doing system analysis.

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Charge Sensitive Preamlifier