MAXIM MAX4080SAUA+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 (V_SENSE = 0V_A). The charging current is represented by an output voltage from V_REF to V_CC, while discharge current is given from VREF to GND. For maximum versatility, the 76V input voltage range applies independently to both supply voltage (V_CC) and common-mode input voltage (V_RS+). 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.

• Ideal for High-Voltage Current Monitoring Applications
• Wide 4.5V to 76V Input Common-Mode Range
• Independent Operating Supply Voltage
• High Accuracy and Low Quiescent Current Support Precision Application Requirements
• ±0.1% Full-Scale Accuracy
• Low 100μV Input Offset Voltage
• Three Gain Versions Available: 5V/V (MAX4080F/MAX4081F), 20V/V (MAX4080T/MAX4081T), 60V/V (MAX4080S/MAX4081S)
• 75μA Supply Current (MAX4080)
• Flexible Current Sensing Supports Monitoring of Charge and Discharge of Batteries
• Bidirectional (MAX4081) or Unidirectional (MAX4080) ISENSE
• Reference Input for Bidirectional OUT (MAX4081)
• Minimizes Required Board Space
• 8-Pin μMAX Package

• Automotive (12V, 24V, or 42V Batteries)
• 48V Telecom and Backplane Current Measurement
• Bidirectional Motor Control
• Power-Management Systems
• Avalanche Photodiode and PIN-Diode Current Monitoring
• General System/Board-Level Current Sensing
• Precision High-Voltage Current Sources