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  5. MAX40056F


Features and Benefits

  • AEC-Q100
  • Fast, 500ns PWM Edge recovery from 500V/µs PWM Edges
  • 60dB AC CMRR Rejection at 50V, ±500V/µs PWM Edges
  • 140dB DC CMRR Rejection
  • -0.1V to +65V Input Voltage Range
  • -5V to +70V Protective Immunity
  • 300kHz, -3dB Bandwidth
  • Multiple Gain Options; 10V/V, 20V/V, 50V/V
  • Internal, 1% Reference for Bidirectional Offset
  • 5µV (Typ) Input Offset Voltage
  • Rail-to-Rail Output
  • 2.02mm x 1.4mm, 8-bump WLP and 8-pin µMAX
  • -40°C to +125°C Temperature Range

Product Details

The MAX40056 is a bidirectional current-sense amplifier with an input common-mode range that extends from -0.1V to +65V together with protection against negative inductive kickback voltages to -5V. This CSA is well-suited for phase current monitoring of inductive loads, such as motors and solenoids, where pulse width modulation is used to control the drive voltage and current. The MAX40056 uses an improved technique to help reject common-mode input PWM edges with slew rates up to and beyond ±500V/µs. Common mode rejection ratio (CMRR) is typically 60dB (50V, ±500V/µs input) and 140dB DC, typical.

The MAX40056 has an internal +1.5V reference for use with a nominal +3.3V power supply. The reference can also be used to drive an adjoining differential ADC. The reference is used to offset the output to indicate the direction of the input sensed current. The REF pin can source current into external loads and helps to avoid the performance compromises resulting from routing reference voltages across noisy PCBs. Alternatively, for higher supply voltages and higher full-scale output swings, the internal reference can be overridden by a higher voltage, external reference.

The internal or external reference can be used to define the trip threshold for the integrated overcurrent comparator. This can provide immediate indication of an overcurrent fault condition.

The MAX40056 operates over the full -40°C to +125°C temperature range and runs from a supply voltage of +2.7V to +5.5V. It is offered in a 2.02mm x 1.4mm 8-pin wafer-level package (WLP) and 8-pin µMAX packages.

Design Solution: How Less Can Be More in Motor Control Design ›


  • Automotive
  • Battery Stack Monitors
  • Current Monitoring of Inductive Loads
  • PWM H-Bridge Motor In-line/In-phase/Winding Current Sensing
  • Solenoid Current Sensing

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Tools & Simulations


Product Recommendations

MAX40056F Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX40056FAUA+ Material Declaration Reliability Data 8-MINI_SO-N/A
MAX40056FAUA+T Material Declaration Reliability Data 8-MINI_SO-N/A
MAX40056FAUA/V+ Material Declaration Reliability Data 8-MINI_SO-N/A
MAX40056FAUA/V+T Material Declaration Reliability Data 8-MINI_SO-N/A
MAX40056FAWA+ Material Declaration Reliability Data 8-WLCSP-N/A
MAX40056FAWA+T Material Declaration Reliability Data 8-WLCSP-N/A
Wafer Fabrication Data MAX40056F Reliability Data

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.