MAX34406 Maxim, MAX34406 Datasheet

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MAX34406

Manufacturer Part Number
MAX34406
Description
The MAX34406 is a quad, high-side, unidirectional, current-sense amplifier that offers precision accuracy
Manufacturer
Maxim
Datasheet

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The MAX34406 is a quad, high-side, unidirectional, cur-
rent-sense amplifier that offers precision accuracy. It
provides analog outputs for each of the four amplifiers
that can be routed to an external ADC, and contains four
overcurrent comparators with a fixed 1.0V threshold. All
four comparators are logically ORed, and the result can
be delayed/filtered with an external capacitor before it is
fed to a latched common shutdown open-drain output pin.
For related parts and recommended products to use with this part, refer to:
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
INx+
INx-
Network Switches/Routers
Base Stations
Servers
Smart Grid Network Systems
Industrial Controls
4
4
R1
R1
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OUTx
with Overcurrent Threshold Comparators
4
General Description
CLAMP
6V
R
OUT
GND
P
Applications
REFERENCE
1.0V
Quad Current-Sense Amplifier
www.maxim-ic.com/MAX34406.related
AMPLIFIER 1
S Four Precision Current-Sense Amplifiers
S Fixed Gains of 25V/V, 50V/V, 100V/V, and 200V/V
S Less Than ±600µV of Input Offset
S Less Than ±0.6% of Gain Error (T/F/H) or ±0.8% of
S Wide 2.0V to 28V Common Mode Range
S Analog Voltage Outputs for Each Amplifier
S Independent Overcurrent Comparators with Fixed
S Low Power Consumption
S -40NC to +85NC Temperature Range
S Small 24-Pin TQFN (4mm x 4mm) Package
Ordering Information
AMPLIFIER 2
AMPLIFIER 3
Gain Error (W)
1.0V Threshold
AMPLIFIER 4
N
OCx
4
OR
POR
E V A L U A T I O N K I T A V A I L A B L E
appears at end of data sheet.
V
OR
5µA
DD
N
CDLY
LATCH THRESHOLD = V
ENA
MAX34406
Block Diagram
CLR
D
CK
MAX34406
Q
19-5930; Rev 1; 1/12
DD
Features
x 50%
N
SHTDN

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MAX34406 Summary of contents

Page 1

... Overcurrent Threshold Comparators General Description The MAX34406 is a quad, high-side, unidirectional, cur- rent-sense amplifier that offers precision accuracy. It provides analog outputs for each of the four amplifiers that can be routed to an external ADC, and contains four overcurrent comparators with a fixed 1.0V threshold. All ...

Page 2

... T = +25NC INx (Note 3) OS MAX34406T MAX34406F G MAX34406H MAX34406W MAX34406T/F/H GE (Note 4) MAX34406W MAX34406T/F/H R (Note 5) OUTx MAX34406W MAX34406T MAX34406F V OL MAX34406H MAX34406W MAX34406T MAX34406F V BW (Note 5) MAX34406H MAX34406W 2mA OL OL MAX34406 = +25NC) (Note 1) A MIN TYP 2.7 2.0 86 120 Q100 25 ...

Page 3

... All open-drain outputs left disconnected. and calculating the error of the slope vs. the ideal: Gain = 100, SENSE Typical Operating Characteristics +25°C GAIN ERROR 150 -0.15 -0.10 -0.05 0 0.05 0.10 0.15 0.20 GAIN ERROR (%) MAX34406 = +25NC) (Note 1)x A MIN TYP 0.98 1. 3.3 7 160 140 120 OC1 ...

Page 4

... TEMPERATURE (°C) LARGE-SIGNAL PULSE RESPONSE (GAIN = 100) MAX34406 toc10 V SENSE V OUTx 20µs/div ����������������������������������������������������������������� Maxim Integrated Products 4 ...

Page 5

... Quad Current-Sense Amplifier ENA 20 SHTDN 21 MAX34406 CDLY 22 N. GND TQFN (4mm x 4mm) FUNCTION SENSE SENSE MAX34406 Pin Configuration 12 OC4 11 OC3 OC2 10 9 OC1 8 N.C. 7 N.C. Pin Description . This output is clamped at 6V. . This output is clamped at 6V. ...

Page 6

... Pin Description (continued) FUNCTION . This output is clamped at 6V. SENSE . This output is clamped at 6V. SENSE to enable normal latch operation of the SHTDN DD reaches nominal operating voltage from this pin to GND delays the transition of the CDLY MAX34406 = /10FA). The DLY CDLY DD being applied (i.e., at power- DD ...

Page 7

... Maxim Integrated Products 7 Typical Application Circuit GND ENA SHTDN OC1 OC2 OC3 OC4 OUT1 OUT2 OUT3 OUT4 CDLY C CDLY MAX34406 µC ADC INPUTS ...

Page 8

... In the linear region (V two components to accuracy: input offset voltage (V and gain error (GE). For all variants of the device 600FV (max); gain error is 0.6% (max) for the OS MAX34406T/F/H or 0.8% (max) for the MAX34406W. Use the linear equation to calculate total error: R (kI) OUTx 20 where GE is gain error, V ...

Page 9

... OUTx = TRC For example, assume a gain of 100V/ the MAX34406H. From Table 100I and R Then every 10mI of PCB trace resistance adds -0.01% gain error. Optional Output Filter Capacitor When designing a system that uses a sample-and-hold stage in the ADC, the sampling capacitor momentarily loads OUTx and causes a drop in the output voltage ...

Page 10

... Figure 3. Bidirectional Application PART MAX34406TETG+* MAX34406TETG+T* MAX34406FETG+* MAX34406FETG+T* MAX34406HETG+ MAX34406HETG+T MAX34406WETG+* MAX34406WETG+T* +Denotes a lead(Pb)-free/RoHS-compliant package Tape and reel. *Future product—contact factory for availability. **EP = Exposed pad. For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a “+”, “#”, or “ ...

Page 11

... Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2012 Maxim Integrated Products © Quad Current-Sense Amplifier DESCRIPTION specification, Pin Description, Typical DLY Maxim is a registered trademark of Maxim Integrated Products, Inc. MAX34406 Revision History PAGES CHANGED — ...

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