MAX40010TAWT+T* [MAXIM]
76V Precision, High-Voltage, Current-Sense Amplifier;
| 型号： | MAX40010TAWT+T* |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 76V Precision, High-Voltage, Current-Sense Amplifier |
| 文件： | 总13页 (文件大小：528K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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MAX40010
76V Precision, High-Voltage,
Current-Sense Amplifier
General Description
Benefits and Features
The MAX40010 single-channel, high-side precision current-
sense amplifier with an input common-mode voltage
range from 2.7V to 76V, making it ideal for communications,
automotive, data centers and other systems where high-
voltage current monitoring is critical. The MAX40010 offer
accuracy specifications of less than 12μV (max) Input
Offset voltage and less than 0.1% (max) gain error. By
offering precision offset and gain error specifications, the
MAX40010 makes it possible to sense very small sense/
shunt resistors, further improving system efficiencies and
power dissipation through the sense element.
● Input Common Mode +2.7V to +76V
● Ultra-Tiny 1mm x 1.5mm 6-bump WLP and SOT23
Packages
● Low 12μV (max) Input Offset Voltage
● Low 0.1% (max) Gain Error
● Available Gain Options:
• G = 12.5V/V: MAX40010L
• G = 20V/V: MAX40010T
• G = 50V/V: MAX40010F
• G = 100V/V: MAX40010H
The MAX40010 features 80kHz of small signal bandwidth
and four unique gain options (12.5V/V, 20V/V, 50V/V, and
100V/V). The device’s current-sense inputs have EMIR
filters to reject RF found in communications equipment.
Applications
● Base-Stations and Communication Equipment
● Server Backplanes/Data Centers
● Automotive Sensing
● Energy Management
● Solar Panel Monitoring
The MAX40010 operates over the -40° C to + 125°C
temperature range and is offered in a 6-bump, 1mm x
1.5mm wafer-lever package (WLP) with 0.5mm pitch and
a SOT23 U6SN+1 package.
Ordering Information appears at end of data sheet.
Typical Operating Circuit
I
SENSE
V
CM = 2.7V TO 76V
SYSTEM LOAD
R
SENSE
RS-
RS+
V
DD = 2.7V TO 5.5V
V
MAX40010
DD
OUT
GND
19-100015; Rev 5; 10/20
MAX40010
76V Precision, High-Voltage,
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
Reflow Soldering Peak Temperature (Pb-free) ...............+260°C
DD
RS+, RS- to GND..................................................-0.3V to +80V
RS+ to RS- (Continuous) ....................................................±24V
Continuous (> 1s) Input Current (Any Pin).......................±10mA
(Note 1)
Package Thermal Characteristics
6-Bump WLP
6-Pin SOT23
Continuous Power Dissipation
Continuous Power Dissipation
(Derate mW/°C above +70°C)..................................12.34mW
Junction-to-Ambient Thermal Resistance (θ ) .....81.03°C/W
(Derate mW/°C above +70°C)..................................13.40mW
Junction-to-Ambient Thermal Resistance (θ ) .....74.60°C/W
JA
JA
Junction-to-Case Thermal Resistance (θ )..............6.0°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.
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.
Electrical Characteristics
(V
= V
= +36V, 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
DC CHARACTERISTICS
Supply Voltage
SYMBOL
CONDITIONS
MIN
TYP
MAX
5.5
UNITS
V
Guaranteed by PSRR
2.7
V
DD
T = +25°C
350
µA
A
Supply Current
I
DD
-40°C < T < +125°C
800
A
Power-Supply Rejection Ratio
PSRR
2.7V ≤ V
≤ 5.5V
110
2.7
120
dB
DD
Input Common-Mode Voltage
Range
V
Guaranteed by CMRR
76
V
CM
Input Bias Current at V
RS+
I
, I
65
µA
RS+ RS-
and V
RS-
Input Offset Current
I
- I
400
nA
µA
dB
RS+ RS-
Input Leakage Current
I
, I
V
= 0V, V = 76V
RS+
5
RS+ RS-
DD
Common-Mode Rejection Ratio
Input Offset Voltage
CMRR
+4.5V < V
< +76V
125
140
RS+
T
= +25°C
±12
±25
±25
130
A
µV
V
-40°C ≤ T ≤ +85°C
A
OS
-40°C ≤ T ≤ +125°C
A
Input Offset Voltage Drift
TCV
nV/°C
mV
OS
MAX40010L (G = 12.5V/V)
MAX40010T (G = 20V/V)
MAX40010F (G = 50V/V)
MAX40010H (G =100V/V)
200
125
50
Input Sense Voltage
V
SENSE
25
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MAX40010
76V Precision, High-Voltage,
Current-Sense Amplifier
Electrical Characteristics (continued)
(V
= V
= +36V, 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
12.5
20
MAX
UNITS
Full-Scale V
Full-Scale V
Full-Scale V
Full-Scale V
= 200mV
= 125mV
= 50mV
= 25mV
SENSE
SENSE
SENSE
SENSE
Gain (Note 3)
G
V/V
50
100
T
= +25°C
0.1
0.5
0.7
A
Gain Error
GE
-40°C ≤ T ≤ +85°C
%
A
-40°C ≤ T ≤ +125°C
A
Output Resistance
Output Low Voltage
R
0.1
80
mΩ
OUT
V
Sink 500µA
15
mV
OL
V
0.016
-
DD
Output High Voltage
AC CHARACTERISTICS
Signal Bandwidth
V
Source 500µA
V
OH
Gain = 50V/V Configuration
BW -3dB
kHz
V
> 5mV
SENSE
AC Power Supply Rejection
Ratio
AC PSRR
AC CMRR
f = 200kHz
f = 200kHz
40
48
dB
dB
AC CMRR
∆V
= 2V , 0.1% final V
settling
OUT
OUT
P-P
Output Transient Recovery Time
with 400Ω and 1nF onto 6pF ADC input
2
µs
sampling capacitor
With 240Ω isolation resistor
20
nF
pF
Capacitive Load Stability
C
LOAD
Without any isolation resistor
f = 1kHz
200
Input Voltage Noise Density
Total Harmonic Distortion
Power-Up Time (Note 4)
Saturation Recovery Time
e
n
65
60
nV/√Hz
dB
THD
f = 1kHz, V
= 1V
OUT P-P
200
10
µs
µs
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
= 20% full scale and V
= 80%
SENSE2
SENSE1
full scale.
Note 4: Output is high-Z during power-up.
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MAX40010
76V Precision, High-Voltage,
Current-Sense Amplifier
Typical Operating Characteristics
(V
= V
= +36V, 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.)
A
INPUT OFFSET VOLTAGE vs.
INPUT COMMON MODE VOTLAGE
INPUT OFFSET VOLTAGE HISTOGRAM
INPUT OFFSET VOLTAGE vs. TEMPERATURE
20
18
16
14
12
10
8
5
4
8
6
GAIN = 20V/V
GAIN = 20V/V
VDD = 3.3V
TA = -40°C
GAIN = 20V/V
3
4
2
2
1
0
0
-1
-2
-3
-4
-5
-6
TA = 25°C
-2
-4
-6
-8
-10
6
4
2
TA = 125°C
60
0
-4
-3
-2
-1
0
1
2
3
4
-50
0
50
100
150
0
2.5
0
20
40
80
INPUT OFFSET VOLTAGE (μV)
TEMPERAUTRE (°C)
INPUT COMMON MODE VOLTAGE (V)
GAIN ERROR vs.
INPUT COMMON MODE VOTLAGE
INPUT OFFSET VOLTAGE vs.
SUPPLY VOLTAGE
GAIN ERROR vs. TEMPERATURE toc04
toc05
toc06
0.2
0.15
0.1
0.25
0.2
0.15
0.1
0.05
0
12
10
8
VDD = 3.3V
TA = -40°C
GAIN = 20V/V
TA = -40°C
6
4
0.05
0
2
TA = 25°C
0
-0.05
-0.1
-0.15
-0.2
-2
-4
-6
-8
-10
TA = 25°C
TA = 125°C
-0.05
-0.1
TA = 125°C
60 80
GAIN = 20V/V
GAIN = 20V/V
20
-50
0
50
100
150
3.5
4.5
5.5
0
40
TEMPERATURE (°C)
INPUT COMMON MODE VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs.
SUPPLY VOLTAGE
OUTPUT VOLTAGE HIGH vs.
SOURCE CURRENT
OUTPUT VOLTAGE LOW vs.
SINK CURRENT
toc07
toc08
toc09
0.45
0.4
300
250
200
150
100
50
300
250
200
150
100
50
GAIN = 20V/V
GAIN = 20V/V
GAIN = 20V/V
TA = 125°C
TA = 25°C
TA = 125°C
0.35
0.3
TA = 125°C
TA = -40°C
TA = 25°C
TA = 25°C
0.25
0.2
TA = -40°C
8
TA = -40°C
0
0
2.5
3.5
4.5
5.5
0
2
4
6
10
2
4
6
8
10
SUPPLY VOLTAGE (V)
SOURCE CURRENT (mA)
SINK CURRENT (mA)
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MAX40010
76V Precision, High-Voltage,
Current-Sense Amplifier
Typical Operating Characteristics (continued)
(V
= V
= +36V, 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.)
A
AC CMRR vs. FREQUENCY
GAIN vs. FREQUENCY
AC PSRR vs. FREQUENCY
toc10
toc11
toc12
120
100
80
100
80
60
40
20
0
30
25
20
15
10
5
200mVP-P INPUT
VCM = 12V
VCM = 12V
G = 20 V/V
60
40
0
-5
20
GAIN = 20V/V
50% FS OUTPUT
CM = 12V
VDD =100mVP-P + 3.3VDC
-10
-15
-20
0
V
GAIN = 20V/V
-20
-20
0.01
0.1
1
10 100 1000
0.01
0.1
1
10
100
1000
0.001 0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
FREQUENCY (kHz)
FREQUENCY (kHz)
SMALL-SIGNAL STEP RESPONSE
LARGE-SIGNAL STEP RESPONSE
SATURATION RECOVERY RESPONSE
10kΩ LOAD
NO LOAD
120mV
0
400mV
20mV
VIN
VIN
VIN
0
50mV/div
200mV/div
10mV/div
0
2.4V
0
400mV
VOUT
VOUT
VOUT
1V/div
0
1V/div
0
200mV/div
200μs/div
2μs/div
200μs/div
INPUT VOLTAGE NOISE DENSITY vs.
TOTAL HORMONIC DISTORTION vs.
FREQUENCY
TURN ON RESPONSE
toc18
FREQUENCY
toc16
toc17
300
0
50% FS OUTPUT
1VP-P OUTPUT
-10
-20
-30
-40
-50
-60
-70
-80
-90
V
DD = 5.0V, VCM = 2.7V
250
200
150
100
50
2V/div
VDD
G = 20 V/V
100mV/div
VOUT
V(RS+ - RS-) = 0mV
0
10
1000
100000
10
100
1000
10000
100000
100ms/div
FREQUENCY (Hz)
FREQUENCY (Hz)
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MAX40010
76V Precision, High-Voltage,
Current-Sense Amplifier
Typical Operating Characteristics (continued)
(V
= V
= +36V, 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.)
A
TURN OFF RESPONSE
toc19
STABILITY vs. CAPACITIVE AND SERIES
ISOLATION RESISTOR
100
STABLE
2V/div
10
VDD
1
0.1
100mV/div
VOUT
UNSTABLE
0.01
0.01
0.1
1
10
100
1000
20ms/div
CAPACITIVE LOAD (nF)
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MAX40010
76V Precision, High-Voltage,
Current-Sense Amplifier
Pin Configurations
TOP VIEW
NC
MAX40010
+
+
1
2
3
6
5
4
RS-
A1
A2
B1
B2
B3
RS-
NC
RS+
MAX40010
GND
GND
OUT
RS+
VDD
VDD
OUT
A3
WLP
SOT23-6
Pin Description
PIN
NAME
FUNCTION
WLP
B1
SOT23
5
6
4
2
3
1
RS+
RS-
External Resistor Power-Side Connection Input
External Resistor Load-Side Connection Input
Supply Voltage Input
A1
A3
VDD
GND
OUT
NC
B2
Ground or Supply Return Input
B3
Output. Output is proportional to the magnitude of differential sense input voltage.
A2
No Connect.
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MAX40010
76V Precision, High-Voltage,
Current-Sense Amplifier
Functional (or Block) Diagram
V
SENSE
I
LOAD1
R
SENSE
RS+
RS-
R
R
G2
G1
MAX40010
A
1
P1
P
A
F
2
R
1
R
R
1
OUT
GND
Figure 1. MAX40010 Functional Diagram
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MAX40010
76V Precision, High-Voltage,
Current-Sense Amplifier
Detailed Description
Application Information
The MAX40010 high-side, current-sense amplifier fea-
tures a 2.7V 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
Recommended Component Values
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:
than the supply voltage (V ). The MAX40010 monitors
DD
V
= V
x AV
OUT
SENSE
current through an external current-sense resistor and
amplifies the voltage across the resistor.
where V
is the full-scale sense voltage, 200mV for
SENSE
gain of 12.5V/V, 125mV for gain of 20V/V, 50mV for gain
of 50V/V, 25mV for gain of 100V/V, and AV is the gain of
the device.
High-side current monitoring does not interfere with the
ground path of the load being measured, making the
MAX40010 particularly useful in a wide range of high-
voltage systems.
In applications monitoring a high current, ensure that
2
R
is able to dissipate its own I R loss. If the resis-
SENSE
The MAX40010 operates as follows: current from the
tor’s power dissipation exceeds the nominal value, its
value may drift or it may fail altogether.
source flows through R
to the load (Figure 1),
SENSE
creating a sense voltage, V
. The internal op amp
SENSE
A1 force the current through an internal gain resistor RG1
at RS+ input, such that its voltage drop equals the volt-
The MAX40010 sense a wide variety of currents with dif-
ferent sense-resistor values.
age drop (V
) across the external sense resistors
SENSE
Choosing the Sense Resistor
(R
). The internal resistor at RS- input (RG2) has
SENSE
Choose R
based on the following criteria:
the same value as RG1 to minimize the error. The current
through RG1 is sourced by a high-voltage p-channel FET.
Its source current is the same as the drain current which
flows through a second gain resistor, R1, producing a volt-
SENSE
• Voltage Loss: A high R
value causes the power-
SENSE
source voltage to degrade through IR loss. For minimal
voltage loss, use the lowest R value.
SENSE
age VR1 = V
x R1/ RG1.
SENSE
• Accuracy: A high R
value allows lower currents
SENSE
The output voltage V
amp A2 with the gain (1 + RF1/ R1). Hence the V
is produced from a second op
OUT
measured more accurately. This is due to offsets becom-
ing less significant when the sense voltage is larger. For
=
OUT
I
x R
(R1/ RG1) x (1 + RF1/ R1). The value
LOAD
SENSE
best performance, select R
to provide approxi-
SENSE
of internal resistors R1, R2, RG1, RG2, RF are available
in Table 1.
mately 200mV (gain of 12.5V/V), 125mV (gain of 20V/V),
or 50mV (gain of 50V/V), 25mV (gain of 100V/V) of sense
voltage for the full-scale current in each application.
Total gain is 12.5V/V for MAX40010L, 20V/V for the
MAX40010T, 50V/V for the MAX40010F, and 100V/V for
the MAX40010H.
Table 1. Internal Gain-Setting Resistors
GAIN (V/V)
R1, R2 (kΩ)
RG1, RG2 (kΩ)
RF (kΩ)
100
MAX40010L
MAX40010T
MAX40010F
MAX40010H
12.5
20
25
25
25
25
10
10
10
10
175
50
475
100
975
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MAX40010
76V Precision, High-Voltage,
Current-Sense Amplifier
• Efficiency and Power Dissipation: At high current levels,
EMIRR Input Filter
2
the I R losses in R
can be significant. Consider
SENSE
These devices have input EMI filters to prevent effects of
radio frequency interference on the output. The EMI filters
comprise passive devices that present significant higher
impedance to RF signals. See the EMIRR vs. Frequency
plot in the Typical Operating Characteristics section for
details.
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.
• Inductance: Keep inductance low if I
has a large
SENSE
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.
Typical Application Circuit
An example of typical application (Figure 2) 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 an amplifier,
depending on the technology, can be biased up to 50V
or 60V thus requiring a current-sense amplifier like the
MAX40010 with high voltage common mode. The very
low input offset voltage of the MAX40010 minimizes the
value of the external sense resistor, 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) PC board layout techniques.
V
DD
= 3.3V
OUTF OUTS
MAX6126
V
DD
= 3.3V
RS+
RS-
REF+
MAX11125
REF-
250?
20?
OUTPUT
VIN
MAX40010
20nF
220nF
V
= 36V – 76V
DRAIN
µC
RFOUT
RFIN
Figure 2. MAX40010 Used in Base Station Application
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MAX40010
76V Precision, High-Voltage,
Current-Sense Amplifier
Turn On/Off Response
Output Filtering
The internal POR (Power on Reset) structure creates the
inadvertent glitch, as shown in TOC18 and TOC19: typical
turn on and turn off response of MAX40010. The internal
To avoid output noise and transient overshoot, an RC
filter with R = 500Ω and C = 14.7nF at the output is
L
recommended (Figure 3). This also benefits when the
POR event takes place below minimum V
supply voltage
current sense amplifier is connected to a sample and hold
CC
(2.7V) around 1.7V. During this event the bias generators
ADC’s, where the C will act as a charge reservoir during
L
are defined, the internal blocks are set to known state
sample phase. when choosing different values of R and
and as a result, an output (V
) glitch is observed. The
OUT
C , refer to TOC20 (Stability vs. Isolation Resistance and
L
device may take tens of μs to settle to final value during
Capacitive Load) for more information.
power on and less than 10ms to settle during turn off.
MAX40010
RS-
R = 500Ω
RS+
R = 10kΩ
(OPTIONAL)
CL = 14.7nF
Figure 3. Optional Output Filtering
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MAX40010
76V Precision, High-Voltage,
Current-Sense Amplifier
Ordering Information
PART
GAIN (V/V)
12.5
12.5
12.5
12.5
20
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
-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
6 SOT23
6 SOT23
6 WLP
TOP MARK
+ACUR
+ACUR
+DX
MAX40010LAUT+
MAX40010LAUT+T
MAX40010LAWT+
MAX40010LAWT+T
MAX40010TAUT+
MAX40010TAUT+T
MAX40010TAWT+*
MAX40010TAWT+T*
MAX40010FAUT+
MAX40010FAUT+T
MAX40010FAWT+*
MAX40010FAWT+T*
MAX40010HAUT+
MAX40010HAUT+T
MAX40010HAWT+*
MAX40010HAWT+T*
6 WLP
+DX
6 SOT23
6 SOT23
6 WLP
+ACUS
+ACUS
+DY
20
20
20
6 WLP
+DY
50
6 SOT23
6 SOT23
6 WLP
+ACUT
+ACUT
+DV
50
50
50
6 WLP
+DV
100
100
100
100
6 SOT23
6 SOT23
6 WLP
+ACUU
+ACUU
+DW
6 WLP
+DW
*Future product—contact factory for availability.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = tape and reel.
Package Information
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 TYPE
6 WLP
PACKAGE CODE
W61K1+1
OUTLINE NO.
21-100121
21-0058
LAND PATTERN NO.
Refer to Application Note 1891
91-0175
6 SOT23
U6SN+1
Maxim Integrated
│ 12
www.maximintegrated.com
MAX40010
76V Precision, High-Voltage,
Current-Sense Amplifier
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
7/17
Initial release
—
Changed future product status for MAX40010LAUT+, MAX40010TAUT+,
and MAX40010HAUT+ in Ordering Information table
1
2
10/17
1/18
10
Added TOCs 18–20, added “Turn On/Off” and “Output Filtering” sections, and
Figure 3
5, 6, 9, 10
3
4
5
10/18
7/20
Updated Ordering Information
Updated Ordering Information
Updated EC Table
12
12
3
10/20
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
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.
2020 Maxim Integrated Products, Inc.
│ 13
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