MAX4080SASA+T

The MAX4080/MAX4081 are high-side, current-sense
amplifiers with an input voltage range that extends from
4.5V to 76V making them ideal for telecom, automotive,
backplane, and other systems where high-voltage current
monitoring is critical. The MAX4080 is designed for unidirectional current-sense applications and the MAX4081
allows bidirectional current sensing. The MAX4081 single output pin continuously monitors the transition from
charge to discharge and avoids the need for a separate
polarity output. The MAX4081 requires an external reference to set the zero-current 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.
For maximum versatility, the 76V input voltage range
applies independently to both supply voltage (VCC) and
common-mode input voltage (VRS+). High-side current
monitoring does not interfere with the ground path of the
load being measured, making the MAX4080/MAX4081
particularly useful in a wide range of high-voltage systems.
The combination of three gain versions (5V/V, 20V/V,
60V/V = F, T, S suffix) and a user-selectable, external
sense resistor sets the full-scale current reading and its
proportional output voltage. The MAX4080/MAX4081
offer a high level of integration, resulting in a simple, accurate, and compact current-sense solution.
The MAX4080/MAX4081 operate from a 4.5V to 76V single supply and draw only 75µA of supply current. These
devices are specified over the automotive operating temperature range (-40°C to +125°C) and are available in a
space-saving 8-pin µMAX® or SO package.