Specifications

Sensors
Current, light, and proximity sensing
80 Maxim Industrial Solutions
Benefits
• Real-time power and current
monitoring enhances system reliability
– ±1.5% (max) current-sense accuracy
– ±1.5% (max) power-sense accuracy
– 4V to 28V input-source voltage range
• Integrated functionality reduces system
cost and shortens design cycle
– Two integrated uncommitted
comparators allow diagnostic alarm
– Integrated 1.21V reference output
– Three current/power-gain options
provide flexibility in any industrial
application
MAX4211
The MAX4211 is a full-featured, continuous current and power
monitor. The device combines a high-side current-sense amplifier,
1.21V bandgap reference, and two comparators with open-drain
outputs to make detector circuits for overpower, overcurrent, and/or
overvoltage conditions.
System diagnostics ensure longer up-time in harsh operating environments
Typical operating circuit for the MAX4211 power and current monitor for harsh
operating environments.
+
-
IOUT
V
CC
+
RS-RS+
-
R
SENSE
V
SENSE
LOAD
1.21V
REFERENCE
POUT
REF
2.7V TO
5.5V
+
-
4V TO
28V
CIN1+
INHIBIT
COUT1
COUT2
LE
CIN1-
CIN2+
CIN2-
GND
25:1
MAX4211A
MAX4211B
MAX4211C