HomedatasheetMAX4081FASA+T

MAX4081FASA+T Datasheet

Current Sense Amplifiers
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Description

The MAX4081FASA+T is 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 MAX4081FASA+T is designed for unidirectional current-sense applications and the MAX4081FASA+T allows bidirectional current sensing. The MAX4081FASA+T single output pin continuously monitors the transition from charge to discharge and avoids the need for a separate polarity output. The MAX4081FASA+T 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 MAX4081FASA+T 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 MAX4081FASA+T 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. MAX4081FASA+T Features • Wide 4.5V to 76V Input Common-Mode Range• Bidirectional or Unidirectional ISENSE• Low-Cost, Compact, Current-Sense Solution• Three Gain Versions Available5V/V (MAX4080F/MAX4081F)20V/V (MAX4080T/MAX4081T)60V/V (MAX4080S/MAX4081S)• ±0.1% Full-Scale Accuracy• Low 100µV Input Offset Voltage• Independent Operating Supply Voltage• 75µA Supply Current (MAX4080)• Reference Input for Bidirectional OUT (MAX4081)• Available in a Space-Saving, 8-Pin µMAX Package MAX4081FASA+T Applications • 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 Source
Features

Parameters

[{"Name":"Gain Bandwidth Product","Value":"150kHz"},{"Name":"Current - Input Bias","Value":"5μA"},{"Name":"Voltage - Input Offset","Value":"100μV"},{"Name":"Current - Supply","Value":"103μA"},{"Name":"Voltage - Supply, Single/Dual (±)","Value":"4.5 V ~ 76 V"},{"Name":"Operating Temperature","Value":"-40°C ~ 125°C"},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""}]

Manufacturer information

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