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Analog Devices MAX40056FAUA+ — Analog & Data Acquisition

MAX40056FAUA+ Current Sense Amplifier, 300 kHz, Rail-to-Rail

MPNMAX40056FAUA+
End of Life

Analog Devices MAX40056FAUA+, Current Sense Amplifier, 1 Circuit, 300 kHz -3dB Bandwidth, Rail-to-Rail Output, 2.7 V to 5.5 V Supply, 8-uMAX/uSOP Package, -40°C to 125°C.

$3.69Ref. price · indicative, final on quote
Packaging8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX40056FAUA+ specifications
ParameterValue
Output typeRail-to-Rail
MountingSurface Mount
Amplifier typeCurrent Sense
Voltage - input offset5 µV
Voltage - supply span5.5 V
Current - supply6mA
Current - input bias20 µA
Current - output (Channel)20 mA
Operating temperature-40°C ~ 125°C
-3db bandwidth300 kHz
PackageTube
Slew rate1.5V/µs
Case8-TSSOP, 8-MSOP (0.118\", 3.00mm Width)
Number of circuits1

Product details

The Analog Devices MAX40056FAUA+ is a single-channel current-sense amplifier in an 8-uMAX/uSOP surface-mount package.

The 20 µA input bias current and 5 µV input offset voltage are typical for a precision current-sense amplifier; the offset contributes negligible error across the temperature span.

Output drive and supply current

The rail-to-rail output can source or sink 20 mA per channel – enough to drive an ADC input directly or feed a low-impedance control loop. Supply draw is 6 mA, which matters if you are powering the amp from a tight bias rail on a multi-channel board.

Frequently asked questions

Can the MAX40056FAUA+ be used for high-side or low-side current sensing?

Yes, as a current-sense amplifier it works on either the high side or low side of the supply rail. The rail-to-rail output swing accommodates both configurations.

What is the bandwidth of the MAX40056FAUA+?

The -3 dB bandwidth is 300 kHz, suitable for DC and low-frequency current measurements up to motor-drive and solenoid frequencies.