Flexible Sensor Interface Circuit

[pionex]

Is anyone aware of a good circuit (or better yet IC) that handles end to end interfacing of various sensor inputs to an ADC channel?

Specifically, I want something like that might be found on an oscilloscope where I can program the circuit to accept input signals that are single-ended, differential, low voltage, high voltage, bi-polar, unipolar, etc.. I would also like a programmable anti-aliasing capability. Is a simple circuit for this functionality a pipe-dream?

For more specific requirements, I currently need to interface sensors that are 0-5v, 0-3v, and -15 to 15v output to a 0-3v reference ADC.

 

[kender]

It's not only a dream. I have a small USB DAQ device made by National Instruments. Its input ranges are programmable in a wide range. I've opened it, and it seems that all signal conditioning and conversion is done with a single chip - ADS7870. Analog Devices AD77xx is another family to look at.

"PGA (programmable gain amplifier)" and "mux" could be good words to look for.

Finally, here' a good place to mirror your question: **broken link removed**

 

[karesz]

Maxim has "sensor interface ICs" too, type an yet not remember...
K.