The automotive-qualified LMP8480-Q1 and LMP8481-Q1 devices are precision, high-side,
current-sense amplifiers that amplify a small differential voltage developed across a current-sense
resistor in the presence of high input common-mode voltages. These amplifiers are designed for
bidirectional (LMP8481-Q1) or unidirectional (LMP8480-Q1) current applications and accept input
signals with a common-mode voltage range from 4 V to 76 V with a bandwidth of 270 kHz. Because the
operating power-supply range overlaps the input common-mode voltage range, the LMP848x-Q1 can be
powered by the same voltage that is being monitored. This benefit eliminates the need for an
intermediate supply voltage to be routed to the point of load where the current is being monitored,
resulting in reduced component count and board space.
The LMP848x-Q1 family consists of fixed gains of 20, 60, and 100 for applications that
demand high accuracy over temperature. The low-input offset voltage allows the use of smaller sense
resistors without sacrificing system error. The LMP8480-Q1 and LMP8481-Q1 are pin-for-pin
replacements for the MAX4080 and MAX4081 devices, offering improved offset voltage, wider reference
adjust range, and higher output drive capabilities. The LMP8480-Q1 and LMP8481-Q1 are available in
an 8-pin VSSOP package.
View datasheet View product folder