Datasheet
Power-Supply Bypassing and Grounding
In most applications, grounding the MAX4172 requires no
special precautions. However, in high-current systems,
large voltage drops can develop across the ground plane,
which can add to or subtract from V
OUT
. Use a single-point
star ground for the highest currentmeasurement accuracy.
The MAX4172 requires no special bypassing and
responds quickly to transient changes in line current. If
the noise at OUT caused by these transients is a problem,
you can place a 1μF capacitor at the OUT pin to ground.
You can also place a large capacitor at the RS terminal (or
load side of the MAX4172) to decouple the load, reducing
the current transients. These capacitors are not required
for MAX4172 operation or stability. The RS+ and RS-
inputs can be filtered by placing a capacitor (e.g., 1μF)
between them to average the sensed current.
Chip Information
SUBSTRATE CONNECTED TO GND
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
SO S8+4 21-0041 90-0096
μMAX U8+1 21-0036 90-0092
MAX4172 Low-Cost, Precision, High-Side
Current-Sense Amplier
www.maximintegrated.com
Maxim Integrated
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