John Chung wrote:

>> Circuit supply voltage is +3.3 volts. Output impedance of transducer is
>> 1K typical. Full output voltage span of sensor is 35mV typical. Nominal
>> input impedance of ADC is 10K. 
>> 
>> I want to amplify the DC voltage from the sensor to the ADC as much as
>> possible. Linearity, temp drift and offset is not too much of an issue.
>> 
>> Can this be done with perhaps a mosfet and a couple resistors? Is there
>> a small package (like a TO92 or 3 pin package) that will do the trick?

> Can't you use a standard opamp for it? If the gain for a single opamp is
> too low, chain them together for a higher gain.

That's a gain of 100, which should be fine. You probably can find a 5-pin
SOT opamp that fits your needs. More expensive, but also more linear and
with a wider output voltage span than a transistor solution. 

Gerhard

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