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MAX40016
4-Decade Current Sense Amplifier
with Internal R
SENSE
General Description
The MAX40016 is a very wide range current sense amplifier
(CSA) with internal sense element that senses from less
than 300µA to greater than 3A current range. The 4-decade
sensed current functions with 1% (typical) gain error and
offers three, multiplexed programmable output ranges in
order to interface with 12-bit ADCs. Having an integrated
sense element has the extra advantage that the entire
current measuring path can be factory-trimmed, saving the
user from having to calibrate independent sense resistors
and CSAs. The MAX40016 drops a typical of 60mV at 3A
from the voltage input to load output.
The MAX40016's integrated current-sensing element
saves the space and cost of an external high-power,
precision current sense resistor. The MAX40016 is offered
in an ultra-tiny, 1.98mm x 1.31mm, 15-bump wafer-level
package (WLP), further reducing board space.
The MAX40016 operates with a supply voltage from 2.5V
to 5.5V. The device features a low-power mode in which
the current-sensing element remains on, but the outputs
are turned off to reduce the total supply current below
10µA (max).
The MAX40016 also includes a committed on-board
amplifier with an internal gain of 1.5V/V. The MAX40016
operates over the -40°C to +125°C temperature range.
Benefits and Features
●
Integrated Current Sense Element Saves The Space
and Cost of Expensive Precision Sense Resistors
●
4-Decade Measurement Range
• Maintains Accuracy from < 300µA to > 3A
●
Withstands Overloads to 4A
●
Low Voltage Drop Across Sense Element
• 60mV (Active Mode, 3A Load)
• 35mV (Low Power Mode, 3A Load)
●
Three Multiplexed Scaling Resistor Outputs Allow
Full Dynamic Range while Interfaced to 12-bit ADCs
●
+2.5V to +5.5V Input Supply Voltage Range
●
Low Power Mode Reduces Supply Current to 10µA
Max
●
Space-Saving
• Tiny 1.98mm x 1.3mm, 15-Bump WLP
• 4mm x 4mm 16-Pin TQFN
●
-40°C to +125°C Operating Temperature Range
Applications
Ordering Information
appears at end of data sheet.
●
Mobile Devices
●
RF Power Monitoring
●
Portable Instruments
19-100232; Rev 1; 8/18
MAX40016
4-Decade Current Sense Amplifier
with Internal R
SENSE
Simplified Block Diagram
INPUT 2.5V to 5.5V
AT UP TO 3A
MEASURED
CURRENT
V
DD
LD
ISH
R
ISH
160Ω
ISM
R
ISM
5.36kΩ
ISL
R
ISL
160kΩ
MAX40016
CURRENT
MIRROR
CONTROL
SEL0
FROM
CONTROLLER
SEL1
RANGE
SELECTION
GNDS
GND
VOUT
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Maxim Integrated
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MAX40016
4-Decade Current Sense Amplifier
with Internal R
SENSE
Absolute Maximum Ratings
V
DD
to GND ............................................................-0.3V to +6V
GND to GNDS ......................................................-0.3V to +0.3V
SEL0, SEL1, ISL, ISM, ISH, V
OUT
to GND ..-0.3V to V
DD
+0.3V
V
DD
to LD ...............................................................-0.3V to 0.3V
LD to GND ......................................... V
DD
- 0.3V to V
DD
+ 0.3V
Maximum Current
( All pins except V
DD
, LD, continuous) ...........................20mA
Current from V
DD
to LD (Continuous).....................................4A
Continuous Power Dissipation (T
A
= +70°C)
15-Bump WLP (derate 14.39mW/°C above +70°C) ..... 1151.2mW
16-Pin TQFN (derate 25mW/°C above +70°C) .............2000mW
Operating Temperature Range ......................... -40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................ -65°C to +150°C
Soldering Temperature (reflow) .......................................+260°C
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.
Package Information
15 WLP
PACKAGE CODE
Outline Number
Land Pattern Number
Junction to Ambient (θ
JA
)
21-100213
Refer to
Application Note 1891
69.5°C/W
N/A
T1644+4
21-0139
90-0070
40°C/W
6°C/W
N151B1+1
THERMAL RESISTANCE, MULTI-LAYER BOARD:
Junction to Case (θ
JC
)
PACKAGE CODE
Outline Number
Land Pattern Number
Junction to Ambient (θ
JA
)
Junction to Case (θ
JC
)
16 TQFN
THERMAL RESISTANCE, MULTI-LAYER BOARD:
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 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
DD
= 3.6V, I
LD
= 300mA, C
LD
= 10μF, SEL0 = V
DD
, SEL1 = V
DD
(ISH range is selected), T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C (Note 1))
PARAMETER
CURRENT SENSING
Supply Voltage
Supply Current (Active)
Supply Current (Low-Power Mode)
Power-Up Time
Power Supply Rejection Ratio
PSRR
V
DD
I
DD
I
DD_LP
Guaranteed by PSRR
No I
LD
current, V
ISX
= 0V
Low-power mode (SEL0 = 0V, SEL1 =
0V), no I
LD
current, V
ISX
= 0V
Measure at 50% of VOUT.
∆Gain
Error/∆V
DD
, measured at ISX
(Note 2)
-0.6
2.5
0.8
5
100
+0.2
+0.6
5.5
1.2
10
V
mA
µA
µs
%/V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
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Maxim Integrated
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MAX40016
4-Decade Current Sense Amplifier
with Internal R
SENSE
Electrical Characteristics (continued)
(V
DD
= 3.6V, I
LD
= 300mA, C
LD
= 10μF, SEL0 = V
DD
, SEL1 = V
DD
(ISH range is selected), T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C (Note 1))
PARAMETER
SYMBOL
CONDITIONS
Active mode,
I
LD
= 3A
(Note 6)
Active mode,
I
LD
= 2A
Low power
mode, I
LD
= 3A
(Note 6)
Low power
mode, I
LD
= 2A
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
160
160
120
120
150
150
100
100
2
-4
-4
-3.5
-4
-3.5
-4
-6
-7
-12
-15
-25
-30
0.4
0.8
1.7
%
+2.8
+1.7
+1.4
+0.7
+0.9
+0.9
+0.9
+4
+4
+3.5
+4
+3.5
+4
+6
+7
+12
+15
+25
+30
%
23
35
50
MIN
TYP
60
MAX
90
100
80
95
50
55
35
35
230
250
180
200
220
230
150
160
mA/A
mV
mV
UNITS
Voltage Drop (V
DD
to LD) (WLP)
Voltage Drop (V
DD
to LD) (TQFN)
-40°C < T
A
< +85°C
Active mode,
I
LD
= 3A (Note 6) -40°C < T
A
< +125°C
-40°C < T
A
< +85°C
Active mode,
I
LD
= 2A
-40°C < T
A
< +125°C
Low power
mode, I
LD
= 3A
(Note 6)
Low power
mode, I
LD
= 2A
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
R
ISX
= 160Ω,
I
LD
= 30mA to 3A
Current Gain
G
I
I
ISX
/I
LD
, measured at ISX
R
ISX
= 160Ω,
I
LD
= 3A (Note 6)
R
ISX
= 160Ω,
I
LD
= 300mA
R
ISX
= 5.36kΩ,
I
LD
= 30mA
R
ISX
= 160kΩ,
I
LD
= 3mA
R
ISX
= 160kΩ,
I
LD
= 1mA
R
ISX
= 160kΩ,
I
LD
= 300μA
Current Gain Error
G
I_ERR
Nonlinearity Current Gain Error
G
I_ERR(NON)
Measured at
ISX
R
ISX
= 5.36kΩ,
I
LD
= 3mA to 30mA
R
ISX
= 160kΩ,
I
LD
= 300μA to 3mA
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Maxim Integrated
│
4
MAX40016
4-Decade Current Sense Amplifier
with Internal R
SENSE
Electrical Characteristics (continued)
(V
DD
= 3.6V, I
LD
= 300mA, C
LD
= 10μF, SEL0 = V
DD
, SEL1 = V
DD
(ISH range is selected), T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C (Note 1))
PARAMETER
SYMBOL
CONDITIONS
Measured at
ISX,
0V < V
ISX
<
1.1V
I
LD
= 0
Guaranteed by Output Amplifier Gain
Error
V
OS
Input referred (Note 4)
∆V
OUT
/∆V
DD,
V
ISX
= 1.0V,
2.5V < V
DD
< 5.5V
G
V
G
V_ERR
0.01V < V
ISX
< 1V
∆V
OUT
/∆I
OUT
, sourcing 0 and 2mA,
V
ISX
= 1.0V,
∆V
OUT
/∆I
OUT
, sinking 0 and 500μA,
V
ISX
= 10mV
SEL0 = 0V, SEL1 = 0V, at V
OUT
= 1.5V
V
ISX
= 0V, V
OUT
= 1.65V, pulsed test
V
ISX
= 1.1V, V
OUT
= 0V, pulsed test
R
ISX
connected to ISX pins
R
ISX
= 160Ω,
I
LD
= 3A
(Note 6)
R
ISX
= 160Ω,
I
LD
= 300mA
Total Transimpedance Gain Error
(Measured at V
OUT
)
R
ISX
= 5.36kΩ,
I
LD
= 30mA
R
ISX
= 160kΩ,
I
LD
= 3mA
R
ISX
= 160kΩ,
I
LD
= 1mA
R
ISX
= 160kΩ,
I
LD
= 300μA
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
-4
-4
-3.5
-4
-3.5
-4
-6
-7
-12
-15
-25
-30
+3
+1.8
+1.5
+0.8
-1
R
ISX
= 160Ω,
I
LD
= 2A
R
ISX
= 5.36kΩ,
I
LD
= 100mA
R
ISX
= 160kΩ,
I
LD
= 1mA
MIN
TYP
0.02
0.02
0.06
20
0.01 to
1.0
20
0.2
1.5
+0.2
0.1
0.1
5
28
28
0.003
x R
ISX
+0.9
+0.9
1
+4
+4
+3.5
+4
+3.5
+4
+6
+7
+12
+15
+25
+30
%
+1
1
Ω
1
100
nA
mA
mA
nA
%/V
MAX
UNITS
CMRR_ISX (Note 3)
ISX Residual Current
AMPLIFIER/DC CHARACTERISTICS
Typical Input Voltage
Offset Voltage
PSRR_VOUT
Output Amplifier Gain
Output Amplifier Gain Error
V
µV
mV/V
V/V
%
Output Load Regulation
Leakage Current Into V
OUT
(Low Power Mode)
Max Sink Current
Max Source Current
Total Transimpedance Gain
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