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Analog Devices MAX4173FESA+T — Analog & Data Acquisition

MAX4173FESA+T Current Sense Amplifier, 1.4 MHz, 8-SOIC

MPNMAX4173FESA+T
End of Life

Analog Devices MAX4173FESA+T, Current Sense Amplifier, 1 Circuit, 1.4 MHz -3dB Bandwidth, 420 µA Supply, 3V to 28V Supply Span, 8-SOIC Package, -40°C to 85°C.

$3.05Ref. price · indicative, final on quote
Analog Devices MAX4173FESA+T datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX4173FESA+T specifications
ParameterValue
MountingSurface Mount
Amplifier typeCurrent Sense
Voltage - input offset300 µV
Voltage - supply span28 V
Current - supply420µA
Current - input bias700 µA
Operating temperature-40°C ~ 85°C
-3db bandwidth1.4 MHz
PackageTape & Reel (TR); Cut Tape (CT)
Case8-SOIC (0.154\", 3.90mm Width)
Number of circuits1

Product details

The MAX4173FESA+T is a single-channel current sense amplifier that monitors current by measuring voltage drop across an external sense resistor. It delivers a ground-referenced output voltage proportional to the sensed current.

The 3 V minimum supply means this part works from a single lithium cell or a 3.3 V regulated rail without a boost converter. The 28 V maximum covers 24 V industrial buses and 12 V automotive systems with headroom for load-dump transients. If the design lives in a -40°C to 125°C environment, this temperature grade is the boundary to watch — it is rated for industrial, not full automotive under-hood.

The 8-SOIC package (0.154" body width, 3.90 mm) is a standard footprint that reflows cleanly with a hot-air station or a basic reflow profile. The Tape & Reel and Cut Tape options mean it can be ordered in production reels or as a single cut-tape piece for prototyping without committing to a full reel.

Frequently asked questions

What is the bandwidth of MAX4173FESA+T?

The -3 dB bandwidth is 1.4 MHz, which is sufficient for capturing ripple from switching converters up to a few hundred kilohertz and for monitoring load transients in 12 V and 24 V systems.

Can MAX4173FESA+T be used for low-side current sensing?

Yes, the common-mode input range of a current sense amplifier determines whether it can sense low-side (near ground) or high-side (near supply). The MAX4173FESA+T is a high-side current sense amplifier — its input common-mode range extends from 0 V to 28 V, so it works for both low-side and high-side sensing as long as the sense resistor voltage stays within that range. For low-side sensing with the resistor between the load and ground, the input common-mode voltage is near 0 V, which is within the device's range.