MAX4080
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MAX4080

76V, High-Side, Current-Sense Amplifiers with Voltage Output

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Current-Sense Amplifiers Achieve 0.1% Accuracy with Operation Up to 76V

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Info: : PRODUCTION tooltip
Part Details
Part Models 12
1ku List Price Starting From $1.57
Features
  • 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
Additional Details
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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.

Applications

  • 48V Telecom and Backplane Current Measurement
  • Automotive (12V, 24V, or 42V Batteries)
  • Avalanche Photodiode and PIN-Diode Current Monitoring
  • Bidirectional Motor Control
  • General System/Board-Level Current Sensing
  • Power-Management Systems
  • Precision High-Voltage Current Sources
Part Models 12
1ku List Price Starting From $1.57

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX4080FASA+
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MAX4080FASA+T
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MAX4080FAUA+
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MAX4080FAUA+T
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MAX4080SASA+
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MAX4080SASA+T
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MAX4080SAUA+
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MAX4080SAUA+T
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MAX4080TASA+
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MAX4080TASA+T
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MAX4080TAUA+
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MAX4080TAUA+T
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Product Lifecycle

PCN

May 22, 2018

- 1702N

ASSEMBLY

MAX4080FASA+

PRODUCTION

MAX4080FASA+T

PRODUCTION

Oct 30, 2020

- 1702R2

ASSEMBLY

MAX4080SASA+

PRODUCTION

MAX4080SASA+T

PRODUCTION

Jan 28, 2019

- 1753B

ASSEMBLY

MAX4080SAUA+

PRODUCTION

MAX4080SAUA+T

PRODUCTION

Sep 14, 2018

- 1702B

ASSEMBLY

MAX4080TASA+

PRODUCTION

MAX4080TASA+T

PRODUCTION

Filter by Model

reset

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Part Models

Product Lifecycle

PCN

May 22, 2018

- 1702N

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ASSEMBLY

MAX4080FASA+

PRODUCTION

MAX4080FASA+T

PRODUCTION

Oct 30, 2020

- 1702R2

arrow down

ASSEMBLY

MAX4080SASA+

PRODUCTION

MAX4080SASA+T

PRODUCTION

Jan 28, 2019

- 1753B

arrow down

ASSEMBLY

MAX4080SAUA+

PRODUCTION

MAX4080SAUA+T

PRODUCTION

Sep 14, 2018

- 1702B

arrow down

ASSEMBLY

MAX4080TASA+

PRODUCTION

MAX4080TASA+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX4080EVKIT

Evaluation Kit for the MAX4080 and MAX4081

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MAX4080EVKIT

Evaluation Kit for the MAX4080 and MAX4081

Evaluation Kit for the MAX4080 and MAX4081

Features and Benefits

  • Real-Time Current Monitoring
  • Wide 4.5V to 76V Input Common-Mode Range Independent of Operating Supply Voltage
  • Bidirectional or Unidirectional ISENSE
  • ±0.1% Full-Scale Accuracy
  • 8-Pin µMAX Package
  • Fully Assembled and Tested

Product Detail

The MAX4080 evaluation kit (EV kit) is a fully assembled and tested surface-mount printed-circuit board (PCB) that contains a MAX4080SAUA (8-pin µMAX®) IC. The MAX4080 is a high-side, current-sense amplifier with an input common-mode voltage range that extends from 4.5V to 76V. The current-sense amplifier provides an analog voltage output proportional to the load current flowing through an external sense resistor.

The EV kit can also be used to evaluate the MAX4081, which is a bidirectional version of the current-sense amplifier. The MAX4081's single output pin continuously monitors the transition from charge to discharge and avoids the need for a separate polarity output pin. The MAX4081 requires an external reference to set the zerocurrent output level (VSENSE = 0V). Charging current is represented by an output voltage from VREF to VCC, while discharge current is given from VREF to GND.

All gain versions of the MAX4080 and MAX4081 are footprint-compatible and the MAX4080SAUA can easily be replaced by a MAX4080FAUA, MAX4080TAUA, MAX4081FAUA, MAX4081TAUA, or MAX4081SAUA. With a combination of three gain versions (5V/V, 20V/V, 60V/V = F, T, S suffix) and a user-selectable, external sense resistor, the user can easily match the full-scale load current to the required output-voltage range.

For maximum versatility, these parts can operate with 76V input common-mode voltage at RS+ and RS- pins, independent of operating supply voltage (VCC) used. These parts also allow a large differential voltage between RS+ and RS- pins for high reliability. 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.

Applications

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

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