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MAX34406TETG+T Datasheet(PDF) 10 Page - Maxim Integrated Products

Part # MAX34406TETG+T
Description  Quad Current-Sense Amplifier with Overcurrent Threshold Comparators
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX34406TETG+T Datasheet(HTML) 10 Page - Maxim Integrated Products

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MAX34406
Quad Current-Sense Amplifier
with Overcurrent Threshold Comparators
RIN x IBIAS contributes to the input voltage offset. IBIAS
is typically 0.2FA.
Placing RIN at the INx- input voltage does not affect the
gain error of the device because the gain is given by the
ratio between ROUTx and R1 at INx+.
Bidirectional Application
Some systems can require a precise bidirectional cur-
rent-sense amplifier to accurately monitor currents.
Measurement of the two separate outputs with respect
to GND yields an accurate measure of the bidirectional
currents (Figure 3).
Choosing the Delay Capacitor
The SHTDN output asserts upon overcurrent detection
on any of the 4 channels. OC1 to OC4 are logically ORed
together; SHTDN latches the output after some delay.
SHTDN latch delay is determined by the following equation:
tDLY = CCDLY × (VDD ÷ 10µA)
Example CCDLY and tDLY pairs are given in the Electrical
Characteristics table.
A discharge resistor, RBLEED, with a max resistance
of 22mI, should be added in parallel with CCDLY. The
delay capacitor integrates overcurrent events over time;
a parallel resistor RBLEED allows the capacitor to dis-
charge over time, thus limiting the integration period.
Accumulated voltage from overcurrent events decay
through the bleed resistor with time constant:
τ = RBLEED × CCDLY
Additionally, discharge of accumulated voltage through
RBLEED increases the precision of the SHTDN delay
time, tDLY.
Figure 3. Bidirectional Application
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*Future product—contact factory for availability.
**EP = Exposed pad.
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.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.
PACKAGETYPE
PACKAGECODE
OUTLINENO.
LANDPATTERNNO.
24 TQFN-EP
T2444+4
21-0139
90-0022
PART
GAIN(V/V)
TEMPRANGE
PIN-PACKAGE
MAX34406TETG+*
25
-40NC to +85NC
24 TQFN-EP**
MAX34406TETG+T*
25
-40NC to +85NC
24 TQFN-EP**
MAX34406FETG+*
50
-40NC to +85NC
24 TQFN-EP**
MAX34406FETG+T*
50
-40NC to +85NC
24 TQFN-EP**
MAX34406HETG+
100
-40NC to +85NC
24 TQFN-EP**
MAX34406HETG+T
100
-40NC to +85NC
24 TQFN-EP**
MAX34406WETG+*
200
-40NC to +85NC
24 TQFN-EP**
MAX34406WETG+T*
200
-40NC to +85NC
24 TQFN-EP**
IN2+
OUT1
IN2-
GND
IN1+
IN1-
RSENSE
ILOAD
OUT2
MAX34406
µC
ADC
INPUTS
VDD = 3.3V


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