The RS299 are high-side, current-sense amplifiers with an input voltage range that extends from 4.5V to 76V making them ideal for telecom, backplane, and other systems where high-voltage current monitoring is critical. The RS299 allows bidirectional current sensing. The RS299 single output pin continuously monitors the transition from charge to discharge and avoids the need for a separate polarity output. The RS299 requires an external reference to set the zerocurrent output level (VSENSE=0V). The charging current is represented by an output voltage from VREF to VCC, while discharge current is given from VREF to GND.
The RS299 are high-side, current-sense amplifierswith an input voltage range that extends from 4.5V to76V making them ideal for telecom, backplane, andother systems where high-voltage current monitoringis critical. The RS299 allows bidirectional currentsensing. The RS299 single output pin continuouslymonitors the transition from charge to discharge andavoids the need for a separate polarity output. TheRS299 requires an external reference to set the zerocurrent output level (VSENSE=0V). The charging currentis represented by an output voltage from VREF to VCC,while discharge current is given from VREF to GND.
For maximum versatility, the 76V input voltage rangeapplies independently to both supply voltage (VCC)and common-mode input voltage (VRS+). High-sidecurrent monitoring does not interfere with the groundpath of the load being measured, making the RS299 particularly useful in a wide range of high-voltage systems.
The combination of three gain versions (20V/V,50V/V, 60V/V, 100V/V = B, C, D, E) and a userselectable, external sense resistor sets the full-scalecurrent reading and its proportional output voltage.The RS299 offer a high level of integration, resultingin a simple, accurate, and compact current-sensesolution.
The RS299 operate from a 4.5V to 76V single supply and draw only 135μA of supply current.The RS299 is available in Green SOP8 packages. Itoperates over an ambient temperature range of -40°Cto +125°C.
