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MAX4377HASA-T

P1-P3P4-P6P7-P9P10-P11
19-1781; Rev 7; 10/12
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
MAX4376/MAX4377/
MAX4378
Single/Dual/Quad, High-Side Current-Sense
Amplifiers with Internal Gain
GND
OUT
RS+V
CC
1 5 RS-
MAX4376
2
34
TOP VIEW
SOT23
+
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 High Accuracy +2V to +28V Common-Mode
Range, Functional Down to 0V, 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)
Pin Configurations continued at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
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
MAX4376 T AUK+T 20 -40°C to +125°C 5 SOT23 ADOG
MAX4376TAUK/V+T 20 -40°C to +125°C 5 SOT23 —
MAX4376FAUK+T 50 -40°C to +125°C 5 SOT23 ADOH
MAX4376HAUK+T 100 -40°C to +125°C 5 SOT23 ADOI
M AX 4376H A U K/V + T 100 -40°C to +125°C 5 SOT23 AFGO
MAX4376TASA+ 20 -40°C to +125°C8 SO —
MAX4376FASA+ 50 -40°C to +125°C8 SO —
MAX4376HASA+ 100 -40°C to +125°C8 SO —
Ordering Information continued at end of data sheet.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
T = Tape and reel.
MAX4376/MAX4377/MAX4378
Single/Dual/Quad, High-Side Current-Sense
Amplifiers with Internal Gain
2
Maxim Integrated
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
RS+
= 0 to 28V, V
SENSE
= (V
RS+
- V
RS-
) = 0V, V
CC
= +3.0V to +28V, R
L
= ∞, T
A
= T
MIN
to T
MAX,
unless otherwise noted. Typical
values are at T
A
= 25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
, RS+, RS- to GND ...........................................-0.3V to +30V
OUT to GND ...............................................-0.3V to (V
CC
+ 0.3V)
Differential Input Voltage (V
RS+
- V
RS-
).................................±8V
Output Short Circuit to V
CC
........................................Continuous
Output Short Circuit to GND .....................................................1s
Current into Any Pin..........................................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
8-Pin µMAX (derate 4.5mW/°C above +70°C) .............362mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C) .........727mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Voltage Range V
CC
Guaranteed by PSR test 3 28 V
Common-Mode Input Range V
CM
Guaranteed by total OUT voltage error test 0 28 V
Common-Mode Rejection CMR 2V ≤ V
RS+
≤ 28V, V
SENSE
= 100mV 90 dB
Supply Current per Amplifier I
CC
V
SENSE
= 5mV, V
RS+
> 2.0V, V
CC
= 12V 1 2.2 mA
Leakage Current I
RS+
, I
RS-
V
CC
= 0V, V
RS+
= 28V 8 µA
V
RS+
> 2.0V 0 60
I
RS
+
V
RS+
≤ 2.0V -400 60
V
RS+
> 2.0V 0 120
Input Bias Current
I
RS-
V
RS+
≤ 2.0V -800 120
µA
Full-Scale Sense Voltage V
SENSE
150 mV
V
SENSE
= 100mV,
V
CC
= 12V, V
RS+
= 12V
±6.75
V
SENSE
= 100mV,
V
CC
= 12V, T
A
= +25°C,
V
RS+
= 12V
±0.5 ±3.25
V
SENSE
= 100mV,
V
CC
= 28V, V
RS+
= 28V
±11
V
SENSE
= 100mV,
V
CC
= 28V, V
RS+
= 28V,
T
A
= +25°C
±0.5 ±5
V
SENSE
= 100mV,
V
CC
= 12V, V
RS+
= 0.1V
±9 ±32
Total OU T V ol tag e E r r or ( N ote 2) I
OUT
≤ 2mA
V
SENSE
= 6.25mV,
V
CC
= 12V, V
RS+
= 12V
(Note 3)
±7
%
OUT High Voltage (Note 4) ( V
C C
- V
OUT
) V
CC
= 3V, I
OUT
= 2mA, V
RS+
= 28V 0.9 1.2 V
OUT Low Voltage V
OL
I
OUT
= 200µA, V
CC
= V
RS+
= 12V,
V
SENSE
= 0V, T
A
= +25°C
25 40 mV
MAX4376/MAX4377/MAX4378
Single/Dual/Quad, High-Side Current-Sense
Amplifiers with Internal Gain
3
Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(V
RS+
= 0 to 28V, V
SENSE
= (V
RS+
- V
RS-
) = 0V, V
CC
= +3.0V to +28V, R
L
= ∞, T
A
= T
MIN
to T
MAX,
unless otherwise noted. Typical
values are at T
A
= 25°C.) (Note 1)
Note 1: All devices are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
Note 2: Total OUT Voltage Error is the sum of gain and offset errors.
Note 3: 6.25mV = 1/16 of 100mV full-scale sense voltage.
Note 4: V
SENSE
such that V
OUT
is in saturation.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
SENSE
= 100mV
(gain = +20V/V)
2
V
SENSE
= 100mV
(gain = +50V/V)
1.7
V
SENSE
= 100mV
(gain = +100V/V)
1.2
Bandwidth BW
V
CC
= 12V
V
RS+
= 12V
C
LOAD
= 15pF
V
S E NS E
= 6.25m V (N ote 3) 0.5
MHz
Slew Rate SR V
SENSE
= 20mV to 100mV, C
LOAD
= 15pF 10 V/µs
MAX437_T
+20
MAX437_F +50
Gain A
V
MAX437_H +100
V/V
T
A
= T
M IN
to T
M AX
±5.5
V
SENSE
= 10mV to
150mV, V
CC
= 12V,
I
OUT
= 2mA, gain = 20
and 50, V
RS+
= 12V
T
A
= +25°C ±0.5 ±2.5
T
A
= T
M IN
to T
M AX
5.5
Gain Accuracy ∆A
V
V
S E N S E
= 10m V to
150m V , V
C C
= 20V ,
I
OU T
= 2m A, g ai n = 100,
V
R S +
= 12V
T
A
= +25°C ±0.5 ±2.5
%
V
SENSE
= 6.25mV
to 100mV
400
OUT Setting Time to 1% of Final
Value
V
C C
= 12V , V
RS +
= 12V ,
C
LOAD
= 15pF
V
SENSE
= 100mV
to 6.25mV
800
ns
Maximum Capacitive Load C
LOAD
No sustained oscillation 1000 pF
Output Resistance R
OUT
V
SENSE
= 100mV 5 Ω
Power-Supply Rejection PSR V
RS+
> 2V, V
OUT
= 1.6V, V
CC
= 3V to 28V 66 90 dB
Power-Up Time to 1% of Final
Value
V
SENSE
= 100mV, C
LOAD
= 15pF 2 µs
Saturation Recovery Time to
1% of Final Value
V
CC
= 12V, V
RS+
= 12V, C
LOAD
= 15pF,
V
SENSE
= 100mV
1µs
Reverse Recovery Time to 1%
of Final Value
V
CC
= 12V, V
RS
_ = 12V, C
LOAD
= 15pF,
V
SENSE
= -100mV to +100mV
1µs
P1-P3P4-P6P7-P9P10-P11

MAX4377HASA-T

Mfr. #:
Buy MAX4377HASA-T
Manufacturer:
Maxim Integrated
Description:
Current Sense Amplifiers High-Side Current-Sense Amp
Lifecycle:
New from this manufacturer.
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