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Voltage Reference for  bridge excitation

Question asked by ChaitanyaB on Aug 19, 2011
Latest reply on Aug 19, 2011 by LWong

Hi,

 

I need to select a 5V Voltage reference preferably low noise for my bridge sensors excitation.I will give this to my ADC AD7685 and resistor divider version and buffered will be given to INAMP AD623 2.5V.

 

I have 4 bridge sensors with 100 ohm indivisual output impedance and 2 load cells with 350 ohm output impedance.

 

I need a reference generator with 250 mA current capacity.My input is from Battery 12V.

 

Is it possible to give reference out to bridge excitation?This is because with temperature,load,offset due to anything if my reference moves my ADC and INAMP Vref also moves and may be everything will get compensated.

 

 

Regards,

 

Chaitanya

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