Demonstration Circuit 1117 is a Bi-Directional, High Voltage, High Side Current Sense Amplifier featuring the LTC6104. This demo board amplifies a current-sense resistor voltage-drop, and provides a precision bi-polar output voltage proportional to the bidirectional load current. The LTC6104 is implemented with dual input amplifier sections, one for each polarity of load current. The demo circuit includes scaling resistors that program the gain of each amplification polarity to 25V/V. Both input sections of the LTC6104 are powered from the same supply that the sense resistor is connected to and generates a bipolar signal referenced to a user furnished potential VREF, such as 2.5V.The LTC6104 can perform bi-directional current measurements on supplies ranging from 4V to 60V. Since the output voltage is developed as a bidirectionally-controlled current through a load resistance, ground-loop errors can be eliminated by simply locating the load resistor at the destination point (subsequent signal processing such as A/D conversion).Remote loading can be evaluated by simply removing the on board load resistor (R4).