MAX4211DETE+ Maxim Integrated Products, MAX4211DETE+ Datasheet - Page 19

• Manufacturer Part Number: MAX4211DETE+
• Description: IC CURRENT MONITOR 1.5% 16TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX4211DETE+

• Function: Current Monitor
• Sensing Method: High-Side
• Accuracy: ±1.5%
• Voltage - Input: 4 ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TQFN Exposed Pad
• Product: Power Monitors
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Supply Current (max): 1100 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The MAX4210/MAX4211 families of current- and power-
monitoring ICs integrate a precision current-sense
amplifier and an analog multiplier for a variety of cur-
rent and power measurements. The MAX4211 inte-
grates an additional uncommitted 1.21V reference and
two comparators with open-drain outputs. These fea-
tures enable the design of detector circuits for over-
power, overcurrent, overvoltage, or any combination of
fault conditions. The MAX4210/MAX4211 offer various
gains, packages, and configurations allowing for
greater design flexibility and lower overall cost.
These devices monitor the load current with their high-
side current-sense amplifiers and provide an analog
2.7V TO
4V TO
5.5V
28V
+
+
-
-
V
INHIBIT
LE
COUT1
COUT2
CC
______________________________________________________________________________________
MAX4211A
MAX4211B
MAX4211C
25:1
Detailed Description
+
RS+
GND
REFERENCE
1.21V
V
R
SENSE
SENSE
RS-
CIN1+
CIN2+
POUT
CIN1-
-
IOUT
CIN2-
REF
LOAD
2.7V TO
0 TO 1V
4V TO
5.5V
28V
output voltage proportional to that current at IOUT
(MAX4211). This voltage is fed to the analog multiplier
for multiplying the load current with a source voltage to
obtain a voltage proportional to load power at POUT.
The integrated current-sense amplifier is a differential
amplifier that amplifies the voltage across RS+ and RS-.
A sense resistor, R
and RS-. A voltage drop across R
when a load current is passed through it. This voltage
is amplified and is proportional to the load current. This
voltage is also fed to the analog multiplier for power-
sensing applications (see the Analog Multiplier sec-
tion). The current-sense amplifiers feature three gain
options: 16.67V/V, 25.0V/V, and 40.96V/V (see Table 1).
Functional Diagrams (continued)
+
-
+
-
+
-
High-Side Power and
V
INHIBIT
LE
IN
COUT1
COUT2
CC
MAX4211D
MAX4211E
MAX4211F
Current Monitors
SENSE
+
RS+
Current-Sense Amplifier
GND
REFERENCE
, is connected across RS+
V
R
1.21V
SENSE
SENSE
SENSE
RS-
CIN1+
CIN2+
POUT
CIN1-
-
IOUT
CIN2-
REF
is developed
LOAD
19