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ADOG Arkusz danych(PDF) 1 Page - Maxim Integrated Products

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Szczegółowy opis  Single/Dual/Quad High-Side Current-Sense Amplifiers with Internal Gain
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Producent  MAXIM [Maxim Integrated Products]
Strona internetowa  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

ADOG Arkusz danych(HTML) 1 Page - Maxim Integrated Products

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Single/Dual/Quad, High-Side Current-Sense
Amplifiers with Internal Gain
________________________________________________________________ Maxim Integrated Products
1
GND
OUT
RS+
VCC
15
RS-
MAX4376
2
34
TOP VIEW
SOT23
19-1781; Rev 3; 5/04
General Description
The MAX4376/MAX4377/MAX4378 single, dual, and
quad precision high-side current-sense amplifiers are
available in space-saving packages. They feature
buffered voltage outputs that eliminate the need for
gain-setting resistors and are ideal for today’s notebook
computers, cell phones, and other systems where cur-
rent monitoring is critical. These precision devices are
offered in three fixed-gain versions of 20, 50, and 100:
GAIN
SUFFIX
20
T
50
F
100
H
For example, MAX4376TAUK is a single high-side
amplifier with a gain of 20.
High-side current monitoring is especially useful in bat-
tery-powered systems since it does not interfere with
the ground path of the battery charger. The input com-
mon-mode range of 0 to +28V is independent of the
supply voltage and ensures that the current-sense
feedback remains viable even when connected to a
battery pack in deep discharge.
The full-scale current reading can be set by choosing
the appropriate voltage gain and external-sense resis-
tor. This capability offers a high level of integration and
flexibility, resulting in a simple and compact current-
sense solution.
The MAX4376/MAX4377/MAX4378 operate over a sup-
ply voltage range of +3V to +28V, draw 1mA of supply
current per amplifier, and operate over the full automo-
tive temperature range of -40
°C to +125°C. These
devices have a wide bandwidth of 2MHz, making them
suitable for use inside battery-charger control loops.
The buffered outputs drive up to 2mA of output current
into a ground-referenced load.
The MAX4376 is available in a tiny 5-pin SOT23 pack-
age. The MAX4377/MAX4378 are available in space-
saving 8-pin µMAX and 14-pin TSSOP packages,
respectively.
Applications
Features
o Low-Cost, Single/Dual/Quad, High-Side Current-
Sense Amplifiers
o ±0.5% Typical Full-Scale Accuracy
o +3V to +28V Supply Operation
o Adjustable Current-Sense Capability with External
Sense Resistor
o Buffered Output Voltage with 2mA Drive
o 1mA (typ) Supply Current
o 2.0MHz Bandwidth (Gain = +20V/V)
o Automotive Temperature Range (-40°C to +125°C)
o Full 0 to 28V Common-Mode Range, Independent
of Supply Voltage
o Three Gain Versions Available
+20V/V (MAX437_T)
+50V/V (MAX437_F)
+100V/V (MAX437_H)
o Available in Space-Saving 5-Pin SOT23 (Single),
8-Pin µMAX (Dual), and 14-Pin TSSOP (Quad)
Ordering Information continued at end of data sheet.
Pin Configurations continued at end of data sheet.
Ordering Information
Notebook Computers
Current-Limited Power
Supplies
Fuel Gauges in PC
General-System/Board-
Level Current Monitoring
Battery Chargers
Portable/Battery-Powered
Systems
Cell Phones
Smart Battery Packages
Automotive Current Detect
Power Management
Systems
PA Bias Control
Pin Configurations
PART
GAIN
(+V/V)
TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
MAX4376TAUK-T
20
-40
°C to +125°C
5 SOT23-5
ADOG
MAX4376FAUK-T
50
-40
°C to +125°C
5 SOT23-5
ADOH
MAX4376HAUK-T
100
-40
°C to +125°C
5 SOT23-5
ADOI
MAX4376TASA
20
-40
°C to +125°C8 SO
MAX4376FASA
50
-40
°C to +125°C8 SO
MAX4376HASA
100
-40
°C to +125°C8 SO
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.


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