AD694

–12–

REV. B

Figure 15. Low Cost Sensor Transmitter

The circuit shown, will convert a positive differential signal at

of 3 V to 8 V. The low end of the common-mode range is limited

plifier could be used instead to extend the common-mode range

down to about 1.5 V.

or negative), the reference pin of the in amp (Point C) must be

offset positively from the 2 V reference. For example, discon-

necting Point C from the 2 V reference and connecting it to a

volt differential input from the sensor.