MAX4211DETE+ Maxim Integrated Products, MAX4211DETE+ Datasheet - Page 20

• 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 common-mode voltage range is +4V to +28V and
independent of the supply voltage. With this feature, the
device can monitor the output current of a high-voltage
source while running at a lower system voltage typically
between 2.7V and 5.5V.
The MAX4211 has a current-sense amplifier output. The
voltage at IOUT is proportional to the voltage across
V
where V
A
The MAX4210/MAX4211 integrate an analog multiplier
that enables real-time monitoring of power delivered to
a load. The voltage proportional to the load current is
fed to one input of the multiplier and a voltage propor-
tional to the source voltage is fed to the other. The ana-
log multiplier multiplies these two voltages to obtain an
output voltage proportional to the load power. The ana-
log multiplier is designed only to operate in the positive
quadrant, that is, the inputs and outputs are always
positive voltages.
For the MAX4210D/E/F and MAX4211D/E/F, the analog
multiplier full-scale input at IN is approximately 1V. This
independent multiplier input allows greater design flexi-
bility when using an external voltage-divider. For the
MAX4210A/B/C and MAX4211A/B/C, an integrated volt-
age-divider divides the source voltage at the RS+ pin
by a nominal value of 25 and passes this voltage to the
multiplier. Thus, the full-scale input voltage at RS+ is
25V. The integrated, trimmed resistor-dividers reduce
external component count and cost.
The voltage output at POUT is proportional to the output
power:
For the MAX4210A/B/C and MAX4211A/B/C:
For the MAX4210D/E/F and MAX4211D/E/F:
High-Side Power and
Current Monitors
Table 1. MAX4211 Current-Sense
Amplifier Gain and Full-Scale Sense
Voltage
20
MAX4211A/D
MAX4211B/E
MAX4211C/F
SENSE
VIOUT
______________________________________________________________________________________
PART
:
is the amplifier gain of the device given in Table 1.
SENSE
V
V
POUT
POUT
V
is the voltage across RS+ and RS-, and
IOUT
= A
= A
CURRENT-SENSE
AMPLIFIER GAIN
VPOUT
(A
= A
VPOUT
VIOUT
VIOUT
16.67
25.00
40.96
x V
, V/V)
x V
x V
SENSE
SENSE
Analog Multiplier
SENSE
x V
SENSE VOLTAGE
x V
FULL-SCALE
RS+
IN
(mV)
150
150
100
where V
A
Table 2.
The MAX4211 features two uncommitted open-drain
output comparators. These comparators can be config-
ured to trip when load current or power reaches a set
limit. They can also be configured as a window com-
parator with wire-OR output. Comparator 1 (COUT1)
features latch-enable (LE) and inhibit (INHIBIT) inputs.
When LE is low, the comparator is transparent (it func-
tions as a regular unlatched comparator). When LE is
high, the comparator output (COUT1) is latched. When
high, the INHIBIT input suspends the comparator oper-
ation and latches the output to the current state. The
operation of INHIBIT is similar to LE, except it has a dif-
ferent input threshold and wider hysteresis. The INHIB-
IT logic-high threshold is 1.21V and logic-low threshold
is 0.6V with 0.6V hysteresis. INHIBIT is useful in pre-
venting the comparator from giving false output during
fast RS+ transients. INHIBIT is generally triggered by
an RC network connected to RS+ (see the Applications
Information). Both comparators have a built-in 300µs
blanking period at power-up to prevent false outputs.
The comparator outputs are open drain and they can
be pulled up to V
+28V. LE and INHIBIT are internally pulled down by a
1µA source.
Table 2. MAX4210/MAX4211 Power-Sense
Amplifier Gain and Full-Scale Sense
Voltage
MAX4210A
MAX4210B
MAX4210C
MAX4210D
MAX4210E
MAX4210F
MAX4211A
MAX4211B
MAX4211C
MAX4211D
MAX4211E
MAX4211F
VPOUT
PART
SENSE
is the amplifier gain of the device given in
Internal Comparators (MAX4211)
is the voltage across RS+ and RS- and
CC
AMPLIFIER GAIN
POWER-SENSE
(A
, RS+, or any voltage less than
VPOUT
16.670
25.000
40.960
16.670
25.000
40.960
0.667
1.000
1.640
0.667
1.000
1.640
, 1/V)
SENSE VOLTAGE
FULL-SCALE
(mV)
150
150
100
150
150
100
150
150
100
150
150
100