MAX40201FAUA+T [MAXIM]
Operational Amplifier,;
| 型号： | MAX40201FAUA+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Operational Amplifier, 放大器 |
| 文件： | 总12页 (文件大小：518K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EVALUATION KIT AVAILABLE
MAX40201
Dual-Channel, 0V to 76V Current-Sense Amplifier
General Description
The MAX40201 dual-channel, high-side, current-sense
Benefits and Features
● 0V to 76V Input Common Mode
● Low 12μV (max) Input Offset Voltage
● Low 0.1% (max) Gain Error
amplifier has V of less than 12μV (max) and gain error
OS
of less than 0.1% (max). The outputs of the MAX40201
are voltage outputs capable of swinging to a few tens of
● Gain Options
millivolts of the V
rail and ground.
DD
• G = 25V/V (MAX40201T)
• G = 50V/V (MAX40201F)
• G = 100V/V (MAX40201H)
• G = 200V/V (MAX40201W)
The MAX40201 features an input common-mode voltage
range from 0V to 76V with 80kHz of small-signal band-
width, which makes it ideal for interfacing with a SAR ADC
for multichannel multiplexed data acquisition systems.
● 1.3mm x 2mm 8-Bump WLP and 8-Pin µMAX
Packages
The MAX40201 operates over the -40°C to +125°C
temperature range. The MAX40201 is offered in 8-bump
wafer-level package (WLP) and 8-pin µMAX package.
®
Ordering Information appears at end of data sheet.
Applications
● Base Stations and Communication Equipment
● Power Management Systems
● Server Backplanes
µMAX is a registered trademark of Maxim Integrated Products, Inc.
● Industrial Control and Automation
Typical Operating Circuit
ISENSE1
RSENSE1
VCM = 0V TO 76V
SYSTEM
LOAD 1
RSENSE2
ISENSE2
VCM = 0V TO 76V
SYSTEM
LOAD 2
RS1+
VDD
RS1- RS2+
RS2-
VDD = 2.7V TO
5.5V
OUT2
OUT1
MAX40201
GND
19-100028; Rev 4; 3/18
MAX40201
Dual-Channel, 0V to 76V Current-Sense Amplifier
Absolute Maximum Ratings
V
to GND .........................................................-0.3V to +6.0V
Operating Temperature Range......................... -40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range............................ -65°C to +150°C
Lead Temperature (soldering, 10s)(µMAX only) .............+300°C
Soldering Temperature (reflow).......................................+260°C
DD
RS+, RS- to GND..................................................-0.3V to +80V
RS+ to RS-..........................................................................±30V
Continuous Input Current (Any Pin).................................±20mA
Continuous Power Dissipation (T = +70°C)
A
WLP (derate 13.4mW/°C above +70°C)....................1072mW
µMAX (derate 4.8mW/°C above +70°C)...................387.8mW
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.
(Note 1)
Package Thermal Characteristics
WLP
µMAX
Junction-to-Ambient Thermal Resistance (θ ) .....206.3°C/W
Junction-to-Ambient Thermal Resistance (θ ) .......74.7°C/W
JA
JA
Junction-to-Case Thermal Resistance (θ )...............42°C/W
JC
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(V
= V
= +50V, V
= +3.3V, V
= V
- V
= 1mV, T = -40°C to +125°C, unless otherwise noted. Typical values are
RS- A
RS+
RS-
DD
SENSE
RS+
at T =+25°C.) (Note 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Supply Voltage
V
Guaranteed by PSRR
No loads
2.7
5.5
2.1
V
DD
Supply Current
(Both Channels)
I
1.3
mA
DD
Power-Supply Rejection
Ratio
PSRR
2.7V ≤ V
≤ 5.5V
110
0
dB
V
DD
Input Common-Mode
Voltage Range
V
Guaranteed by CMRR
76
CM
Input Bias Current at
I
, I
0.2
µA
RS+ RS-
V
and V
RS-
RS+
Input Offset Current
I
- I
0.2
0.2
µA
µA
RS+ RS-
Input Leakage Current
I
, I
V
= 0V, V
= 76V
RS+ RS-
DD
RS+
Common-Mode Rejection
Ratio
CMRR
0V < V
< 76V
130
dB
RS+
T
= +25°C, 0 < V
< 76V
< 76V
0.5
±12
±25
±20
±33
130
A
CM
µMAX
WLP
-40°C ≤ T ≤ +125°C,
0 < V
A
< 76V
CM
Input Offset Voltage
V
µV
OS
T
= +25°C, 0 < V
CM
A
-40°C ≤ T ≤ +125°C,
0 < V
A
< 76V
CM
Input Offset Voltage Drift
TCV
nV/°C
OS
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MAX40201
Dual-Channel, 0V to 76V Current-Sense Amplifier
Electrical Characteristics (continued)
(V
= V
= +50V, V
= +3.3V, V
= V
- V
= 1mV, T = -40°C to +125°C, unless otherwise noted. Typical values are
RS+
RS-
DD
SENSE
RS+
RS- A
at T =+25°C.) (Note 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
100
50
MAX
UNITS
MAX40201T (G = 25V/V)
MAX40201F (G = 50V/V)
MAX402015H (G = 100V/V)
MAX40201W (G = 200V/V)
Input Sense Voltage
V
mV
SENSE
25
12.5
25
Full-scale V
Full-scale V
Full-scale V
Full-scale V
= 100mV
= 50mV
SENSE
SENSE
SENSE
SENSE
50
Gain (Note 3)
Gain Error
G
V/V
= 25mV
100
200
= 12.5mV
T
= +25°C
0.1
0.25
0.15
0.3
A
µMAX
WLP
-40°C ≤ T ≤ +125°C
A
GE
%
T
= +25°C
A
-40°C ≤ T ≤ +125°C
A
Output Resistance
R
V
= V
/2, I = ±500μA
OUT
0.1
Ω
OUT
OUT
DD
Sink 500μA
No load
15
4
Output Low Voltage
V
mV
OL
V
0.015
-
DD
Output High Voltage
V
Source 500µA
V
OH
AC CHARACTERISTICS
Signal Bandwidth
BW -3dB
All gain configurations V
f = 200kHz
> 5mV
80
40
kHz
dB
SENSE
AC Power-Supply Rejec-
tion Ratio
AC PSRR
AC CMRR
AC CMRR f = 200kHz, 100mV sine wave
47
20
dB
nF
pF
With 250Ω isolation resistor
Capacitive Load Stability
C
LOAD
Without any isolation resistor
f = 1kHz
200
Input Voltage-Noise
Density
e
n
95
500
20
nV/√Hz
µs
Power-Up Time (Note 4)
Settling Time
(Settling to 0.1%)
V
steps from 20% FS to 80% FS
SENSE
µs
(t = t = 5µs), V
= 24V, C = 20pF
R
F
CM L
Note 2: All devices are 100% production tested at T = +25°C. All temperature limits are guaranteed by design.
A
Note 3: Gain and offset voltage are calculated based on two point measurements: V
and V
.
SENSE1
SENSE2
V
= 20% x Full Scale V
. V
= 80% x Full Scale V
.
SENSE1
SENSE SENSE2
SENSE
Note 4: Output is high-Z during power-up.
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MAX40201
Dual-Channel, 0V to 76V Current-Sense Amplifier
Typical Operating Characteristics
(V
= 3.3V, V
= V
= 50V, V
= V
- V
= 1mV, T =25°C, unless otherwise noted.
DD
RS_+
RS_-
SENSE_
RS_+
RS_- A
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
INPUT OFFSET
VOLTAGE HISTOGRAM
toc02
7
6
toc01
25
20
15
10
5
GAIN = 50V/V
5
4
3
2
1
0
-1
-2
GAIN = 50V/V
0
-50 -25
0
25
50
75 100 125 150
TEMPERAUTRE (°C)
-6 -5 -4 -3 -2 -1
0
1
2
3
4
5
6
INPUT OFFSET VOLTAGE (µV)
INPUT OFFSET VOLTAGE vs. INPUT COMMON
GAIN ERROR
vs. TEMPERATURE
MODE VOTLAGE
toc04
toc03
0.2
0.15
0.1
6
5
TA = +125°C
4
3
0.05
0
2
TA = +25°C
1
-0.05
-0.1
-0.15
-0.2
TA = -40°C
0
-1
-2
-3
VDD = 3.3V
GAIN = 50V/V
GAIN = 50V/V
75 100 125 150
TEMPERATURE (°C)
0
20
40
60
80
-50 -25
0
25
50
INPUT COMMON MODE VOLTAGE (V)
GAIN ERROR vs.
INPUT COMMON MODE VOTLAGE
INPUT OFFSET VOLTAGE
vs. SUPPLY VOLTAGE
toc06
toc05
8
0.2
0.15
0.1
VCM = 50V
VDD = 3.3V
TA = 125°C
TA = +125°C
GAIN = 50V/V
6
4
TA = +25°C
0.05
0
2
TA = +25°C
0
TA = -40°C
-0.05
-0.1
-2
-4
TA = -40°C
4.5
0
20
40
60
80
2.5
3.5
5.5
INPUT COMMON MODE VOLTAGE (V)
SUPPLY VOLTAGE (V)
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MAX40201
Dual-Channel, 0V to 76V Current-Sense Amplifier
Typical Operating Characteristics (continued)
(V
= 3.3V, V
= V
= 50V, V
= V
- V
= 1mV, T =25°C, unless otherwise noted.
DD
RS_+
RS_-
SENSE_
RS_+
RS_-
A
CMRR
vs. TEMPERATURE
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
toc08
toc07
200
180
160
140
120
100
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1
GAIN = 50V/V
VDD = 5.5V
TA = +125°C
VDD = 3.3V
TA = -40°C
TA = +25°C
VDD = 2.7V
0.9
0.8
VCM = 50V
-50
0
50
100
150
2.5
3.5
4.5
5.5
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
PSRR vs. TEMPERATURE
AC CMRR vs. FREQUENCY
toc10
toc09
120
100
80
60
40
20
0
150
140
130
120
110
100
200mVp-p INPUT
GAIN = 50V/V
VCM = 1.65V
VCM = 50V
100
TEMPERATURE (°C)
0.01
0.1
1
10
100
1000
-50
0
50
150
FREQUENCY (kHz)
AC PSRR vs. FREQUENCY
GAIN vs. FREQUENCY
toc11
toc12
120
100
80
60
40
20
0
40
35
30
25
20
15
10
5
GAIN = 50V/V
50% FS OUTPUT
CM = 1.65V
VDD = 100mVp-p + 3.3VDC
G =50V/V
VCM = 1.65V
V
0
0.01
0.1
1
10
100
1000
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
FREQUENCY (kHz)
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MAX40201
Dual-Channel, 0V to 76V Current-Sense Amplifier
Typical Operating Characteristics (continued)
(V
= 3.3V, V
= V
= 50V, V
= V
- V
= 1mV, T =25°C, unless otherwise noted.
DD
RS_+
RS_-
SENSE_
RS_+
RS_- A
LARGE-SIGNAL STEP RESPONSE
SMALL-SIGNAL STEP RESPONSE
toc14
toc13
5mV
50mV
VIN
VIN
20mV/div
2mV/div
0
0
250mV
2.5V
VOUT
VOUT
1V/div
100mV/div
0
0
400µs/div
400µs/div
SATURATION RECOVERY RESPONSE
VOLTAGE NOISE DENSITY
vs. FREQUENCY
toc16
200
180
160
140
120
100
80
100mV
0
VIN
50mV/div
60
VOUT
1V/div
40
0
20
50% FS OUTPUT
0
1
10
100
1000
10000 100000
4µs/div
FREQUENCY(Hz)
CROSSTALK
vs. FREQUENCY
OUTPUT VOLTAGE HIGH
vs. SOURCE CURRENT
toc17
toc18
0
-10
300
50% FS OUTPUT
CM = 1.65V
GAIN = 50V/V
GAIN = 50V/V
V
-20
250
200
150
100
50
-30
TA = +125°C
-40
-50
-60
TA = +25°C
-70
-80
-90
-100
-110
-120
TA = -40°C
0
0.01
0.1
1
10
100
1000
0
3
6
9
12
15
SOURCE CURRENT (mA)
FREQUENCY (kHz)
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MAX40201
Dual-Channel, 0V to 76V Current-Sense Amplifier
Typical Operating Characteristics (continued)
(V
= 3.3V, V
= V
= 50V, V
= V
- V
= 1mV, T =25°C, unless otherwise noted.
DD
RS_+
RS_-
SENSE_
RS_+
RS_- A
OUTPUT VOLTAGE LOW
vs. SINK CURRENT
COMMON-MODE INPUT STEP RESPONSE
toc19
300
250
200
150
100
50
GAIN = 50V/V
76V
VCM
5V
TA = +125°C
VOUT1
TA = +25°C
200mV/div
AC-Coupled
VOUT2
200mV/div
AC-Coupled
TA = -40°C
12
0
0
3
6
9
15
20µs/div
SINK CURRENT (mA)
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MAX40201
Dual-Channel, 0V to 76V Current-Sense Amplifier
Pin Configuration
TOP VIEW
BOTTOM VIEW
+
RS1+
RS1-
RS2+
RS2-
1
2
3
4
8
7
6
5
V
DD
V
OUT1
RS1-
OUT2
RS2+
3
GND
RS2-
B
A
DD
OUT1
OUT2
GND
MAX40201
RS1+
1
2
4
µMAX
WLP
Pin Description
PIN
NAME
FUNCTION
WLP
A1
A2
A3
A4
B1
B2
B3
B4
µΜAX
1
2
3
4
8
7
6
5
RS1+
RS1-
RS2+
RS2-
Channel 1 External Resistor Power-Side Connection
Channel 1 External Resistor Load-Side Connection
Channel 2 External Resistor Power-Side Connection
Channel 2 External Resistor Load-Side Connection
Supply Voltage
V
DD
OUT1
OUT2
GND
Output Channel 1
Output Channel 2
Ground
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MAX40201
Dual-Channel, 0V to 76V Current-Sense Amplifier
Simplified Functional Diagram
V
DD
1.2kΩ
1.2kΩ
RS1+
RS1-
OUT1
A1
GND
MAX40201
GND
V
DD
1.2kΩ
1.2kΩ
RS2+
OUT2
A2
RS2-
GND
GND
In applications monitoring a high current, ensure that
2
Detailed Description
R
is able to dissipate its own I R loss. If the resistor’s
SENSE
The MAX40201 high-side, current-sense amplifier features
a 0V to 76V input common-mode range that is independent
of supply voltage. This feature allows the monitoring of
current out of a battery as low as 2.7V and enables high-
side current sensing at voltages greater than the supply
power dissipation exceeds the nominal value, its value
may drift or it may fail altogether. The MAX40201 senses
a wide variety of currents with different sense-resistor
values.
voltage (V ). The MAX40201 monitors current through
a current-sense resistor and amplifies the voltage across
the resistor.
DD
Choosing the Sense Resistor
Choose R
based on the following criteria:
SENSE
Voltage Loss: A high R
value causes the power-
SENSE
High-side current monitoring does not interfere with the
ground path of the load being measured, making the
MAX40201 particularly useful in a wide range of high-
voltage systems.
source voltage to degrade through IR loss. For minimal
voltage loss, use the lowest R value.
SENSE
Accuracy: A high R
value allows lower currents
SENSE
measured more accurately. This is due to offsets becoming
less significant when the sense voltage is larger. For best
Applications Information
performance, select R
to provide approximately
SENSE
Recommended Component Values
100mV (gain of 25V/V), 50mV (gain of 50V/V), or 25mV
(gain of 100V/V), 12.5mV (gain of 200V/V) of sense
voltage for the full-scale current in each application.
Ideally, the maximum load current develops the full-scale
sense voltage across the current-sense resistor. Choose
the gain needed to yield the maximum output voltage
required for the application:
Efficiency and Power Dissipation: At high current
2
levels, the I R losses in R
can be significant.
SENSE
V
OUT
= V x A
SENSE V
Consider this when choosing the resistor value and its
power dissipation (wattage) rating. In addition, the sense
resistor’s value might drift if it heats up excessively.
where V
is the full-scale sense voltage, 100mV for
SENSE
gain of 25V/V, 50mV for gain of 50V/V, 25mV for gain of
100V/V, 12.5mV for gain of 200V/V, and A is the gain of
V
the device.
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MAX40201
Dual-Channel, 0V to 76V Current-Sense Amplifier
Inductance: Keep inductance low if I
has a large
(NP0/C0G type) close to the V /GND bumps. The
SENSE
DD
high-frequency component. Wire-wound resistors have
the highest inductance, while metal film is somewhat
better. Low-inductance, metal-film resistors are also
available. Instead of being spiral wrapped around a core,
as in metal-film or wire wound resistors, they are a straight
band of metal and are available in values under 1Ω.
capacitors should be rated for at least twice the maximum
expected applied voltage. Applications with noisy or
high-impedance power supplies may require additional
decoupling capacitors to reject power-supply noise.
Base Station Application Circuit
An example of a typical application (Figure 1) of this
high-voltage, high-precision current-sense amplifier is in
base-station systems where there is a need to monitor
the current flowing in the power amplifier. Such amplifiers,
depending on the technology, can be biased up to 50V
or 60V thus requiring a current-sense amplifier like the
MAX40201 with high-voltage common mode. The very
low input offset voltage of the MAX40201 minimizes
the value of the external sense resistor thus resulting in
system power-saving.
Take care to eliminate parasitic trace resistance from
causing errors in the sense voltage because of the high
currents that flow through R
. Either use a four
SENSE
terminal current-sense resistor or use Kelvin (force and
sense) PCB layout techniques.
Power-Supply Bypassing
Power-supply bypass capacitors are recommended for
best performance and should be placed as close as
possible to the supply and ground terminals of the device.
A typical value for this supply bypass capacitor is 0.1μF
V
= 3.3V
DD
MAX6126
OUTF OUTS
V
= 3.3V
DD
REF+
REF-
150Ω
OUTPUT
V
MAX40201
IN
MAX11125
15nF
V
= 2.7V TO 76V
DRAIN
µC
RFOUT
RFIN
Figure 1. MAX40201 Used in Base-Station Application
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MAX40201
Dual-Channel, 0V to 76V Current-Sense Amplifier
Ordering Information
PART
MAX40201TAWA+*
MAX40201TAUA+*
MAX40201FAWA+*
MAX40201FAUA+
MAX40201HAWA+*
MAX40201HAUA+*
MAX40201WAWA+
MAX40201WAUA+*
GAIN (V/V)
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
8 WLP
TOP MARK
+AAK
—
25
25
8 µMAX
8 WLP
50
+AAL
—
50
8 µMAX
8 WLP
100
100
200
200
+AAM
—
8 µMAX
8 WLP
+AAN
—
8 µMAX
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Future Product—Contact factory for availablity.
Package Information
Chip Information
PROCESS: BiCMOS
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.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.
PACKAGE PACKAGE OUTLINE
LAND
TYPE
CODE
NO.
PATTERN NO.
Refer to
Application Note 1891
8 WLP
W81A1+1 21-100147
8 µMAX
U8-1
21-0036
90-0092
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MAX40201
Dual-Channel, 0V to 76V Current-Sense Amplifier
Revision History
REVISION REVISION
PAGES
DESCRIPTION
CHANGED
NUMBER
DATE
0
5/17
Initial release
—
Adjusted CMRR specification in Electrical Characteristics table and removed future
product asterisk from MAX40201FAWA+ in Ordering Information table
1
9/17
2, 11
2
3
4
1/18
3/18
3/18
Updated Ordering Information table
Updated Electrical Charactieristics table
Updated Ordering Information table
11
2, 3
11
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2018 Maxim Integrated Products, Inc.
│ 12
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