Datasheet MAX4080, MAX4081 (Maxim)

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MAX4080/MAX4081 76V, High-Side, Current-Sense Amplifiers with Voltage Output General Description Benefits and Features
The MAX4080/MAX4081 are high-side, current-sense ● Ideal for High-Voltage Current Monitoring Applications amplifiers with an input voltage range that extends from • Wide 4.5V to 76V Input Common-Mode Range 4.5V to 76V making them ideal for telecom, automotive, • Independent Operating Supply Voltage backplane, and other systems where high-voltage current ● High Accuracy and Low Quiescent Current Support monitoring is critical. The MAX4080 is designed for uni- Precision Application Requirements directional current-sense applications and the MAX4081 • ±0.1% Full-Scale Accuracy allows bidirectional current sensing. The MAX4081 sin- • Low 100μV Input Offset Voltage gle output pin continuously monitors the transition from • Three Gain Versions Available charge to discharge and avoids the need for a separate - 5V/V (MAX4080F/MAX4081F) polarity output. The MAX4081 requires an external refer- ence to set the zero-current output level (V - 20V/V (MAX4080T/MAX4081T) SENSE = 0V). The charging current is represented by an output voltage - 60V/V (MAX4080S/MAX4081S) from V • 75μA Supply Current (MAX4080) REF to VCC, while discharge current is given from VREF to GND. ● Flexible Current Sensing Supports Monitoring of For maximum versatility, the 76V input voltage range Charge and Discharge of Batteries applies independently to both supply voltage (V • Bidirectional (MAX4081) or Unidirectional CC) and common-mode input voltage (V (MAX4080) I RS+). High-side current SENSE monitoring does not interfere with the ground path of the • Reference Input for Bidirectional OUT (MAX4081) load being measured, making the MAX4080/MAX4081 ● Minimizes Required Board Space particularly useful in a wide range of high-voltage sys- • 8-Pin μMAX Package tems.
Ordering Information
The combination of three gain versions (5V/V, 20V/V, 60V/V = F, T, S suffix) and a user-selectable, external
PART TEMP RANGE PIN-PACKAGE
sense resistor sets the full-scale current reading and its
MAX4080
FAUA+ -40°C to +125°C 8 µMAX proportional output voltage. The MAX4080/MAX4081 MAX4080FAUA/V+ -40°C to +125°C 8 µMAX offer a high level of integration, resulting in a simple, accu- MAX4080FASA+ -40°C to +125°C 8 SO rate, and compact current-sense solution. MAX4080TAUA+ -40°C to +125°C 8 µMAX The MAX4080/MAX4081 operate from a 4.5V to 76V sin- MAX4080TAUA/V+ -40°C to +125°C 8 µMAX gle supply and draw only 75µA of supply current. These +Denotes a lead(Pb)-free/RoHS-compliant package. devices are specified over the automotive operating tem- /V denotes an automotive qualified part. perature range (-40°C to +125°C) and are available in a
Ordering Information continued at end of data sheet.
space-saving 8-pin µMAX® or SO package.
Selector Guide appears at end of data sheet. Applications Pin Configurations
● Automotive (12V, 24V, or 42V Batteries) ● 48V Telecom and Backplane Current Measurement TOP VIEW ● Bidirectional Motor Control + + ● Power-Management Systems RS+ 1 8 RS- RS+ 1 8 RS- ● Avalanche Photodiode and PIN-Diode Current VCC 2 7 N.C. VCC 2 7 REF1A Monitoring MAX4080 MAX4081 ● General System/Board-Level Current Sensing N.C. 3 6 N.C. N.C. 3 6 REF1B ● Precision High-Voltage Current Sources GND 4 5 OUT GND 4 5 OUT µMAX is a registered trademark of Maxim Integrated Products, Inc. µ
MAX/SO
µ
MAX/SO
19-2562; Rev 6; 12/20