Operating Temperature Range ...........................-40°C to +125°C
Storage Temperature Range ..............................-65°C to +150°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
8 µMAX
Package Code
Outline Number
Land Pattern Number
Thermal Resistance, Four-Layer Board:
Junction-to-Ambient (θ
JA
)
Junction-to-Case Thermal Resistance (θ
JC
)
U8+4
21-0036
90-0092
206°C/W
42°C/W
8 WLP
Package Code
Outline Number
Land Pattern Number
Thermal Resistance, Four-Layer Board:
Junction-to-Ambient (θ
JA
)
W81B2+1
21-100255
Refer to
Application Note 1891
74.65°C/W
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.
www.maximintegrated.com
Maxim Integrated | 2
MAX40056F/
MAX40056T/MAX40056U
Bidirectional Current Sense
Amplifier with PWM-Rejection
Electrical Characteristics
(V
DD
= 3.3V, V
CM
= 48V, V
SENSE
= 20mV, OUT loading = 10kΩ and 20pF to GND, COP loading = 5kΩ and 10pF to GND, T
MIN
=
-40°C, T
MAX
= 125°C, (Note 1))
PARAMETER
Supply Voltage
Supply Current
Power-Up Time
Input Protected CM
Range
Input Common Mode
Range
Input Bias Current
Input Leakage Current
Input Offset Voltage
Input Offset Drift
Power Supply Rejection
Ratio
Common Mode
Rejection Ratio
Input Capacitance
Nominal Gain
SYMBOL
V
DD
I
DD
t
PWR_UP
Out settle within 1%
CONDITIONS
Guaranteed by PSRR
MIN
2.7
6
400
TYP
MAX
5.5
9
UNITS
V
mA
µs
POWER SUPPLY CHARACTERISTICS
CURRENT SENSE AMPLIFIER / DC CHARACTERISTICS
V
CM_P
V
CM
I
RS+
, I
RS-
I
LKG
V
OS
TCV
OS
PSRR
2.7V ≤ V
DD
≤ 5.5V
-0.3V ≤ V
CM
≤ +65V; -40°C ≤ T
A
≤ +85°C
CMRR
C
IN
G
U
G
T
G
F
Gain Error
GE
F
-0.1V ≤ V
CM
≤ +65V; -40°C ≤ T
A
≤
+125°C
RS+ and RS- input
MAX40056U
MAX40056T
MAX40056F
V
CM
= -0.3V, -40°C ≤ T
A
≤ +85°C, -16mV
≤ V
SENSE
≤ +16mV, MAX40056F
V
CM
= 48V, -40°C ≤ T
A
≤ +125°C, -16mV
≤ V
SENSE
≤ +16mV, MAX40056F
Sourcing 5mA; V
OH
= V
DD
- V
OUT
Sinking 5mA; V
OL
= V
OUT
- GND
Shorted to either V
DD
or GND
90
100
120
-40°C ≤ T
A
≤ +85°C
-40°C ≤ T
A
≤ +85°C
V
SENSE
= 0V (Note 2)
V
SENSE
= 20mV
V
DD
= 0V, 0V ≤ V
RS±
≤ 65V (Note 2)
T
A
= +25°C
-40°C ≤ T
A
≤ +125°C
0.5
110
140
140
3
10
20
50
0.05
0.05
45
35
20
1.5
%
0.5
100
70
mV
mV
mA
V/V
pF
-5
-0.3
-0.1
3
20
3
5
+70
+65
+65
200
30
200
20
300
V
V
nA
µA
nA
μV
µV/°C
dB
Output Voltage Swing
High
Output Voltage Swing
Low
Output Short-Circuit
Current
Signal Bandwidth
Output Slew Rate
V
OH
V
OL
I
SC
CURRENT SENSE AMPLIFIER / AC CHARACTERISTICS
BW
-3dB
SR
50% of full-scale range
2V
PP
output square wave, centered at
1.5V
300
1.5
kHz
V/µs
www.maximintegrated.com
Maxim Integrated | 3
MAX40056F/
MAX40056T/MAX40056U
Bidirectional Current Sense
Amplifier with PWM-Rejection
Electrical Characteristics (continued)
(V
DD
= 3.3V, V
CM
= 48V, V
SENSE
= 20mV, OUT loading = 10kΩ and 20pF to GND, COP loading = 5kΩ and 10pF to GND, T
MIN
=
-40°C, T
MAX
= 125°C, (Note 1))
PARAMETER
Amplifier Small-Signal
Settling Time (1%)
PWM Edge Recovery
Settling Time (1%)
AC Common Mode
Rejection Ratio
AC Power Supply
Rejection Ratio
Voltage Noise Density
INTERNAL REFERENCE
REF Output Voltage
REF Thermal Drift
REF Load Regulation
REF Line Regulation
REF Cap Loading
Internal\External
Reference Switching
Threshold Voltage
INTERNAL COMPARATOR
CIP Input Resistance
CIP Input Common
Mode Range
R
CIP
Resistance appears to be to V
REF
10
MIN
(V
REF
-
0.08,
V
DD
-
1.25)
10
40
0.12
0.12
14
12
0.3
0.3
GΩ
V
REF_TH
V
REF
TCV
REF
ΔV
REF
/ΔI
REF
ΔV
REF
/ΔV
DD
0µA ≤ external load ≤ 500µA
2.7V ≤ V
DD
≤ 5.5V
No sustained oscillation
External reference is enabled by
overdriving
No load; -40°C ≤ T
A
≤ +125°C
1.485
1.5
30
30
0.1
1
1.65
1.75
70
0.5
1.515
V
ppm/°C
µV/µA
mV/V
µF
V
SYMBOL
t
S
t
S_PWM
AC CMRR
AC PSRR
e
n
CONDITIONS
±200mV output step
0V to 50V edges: 500V/μs rise/fall times,
V
SENSE
= 0mV (V
RS+
= V
RS-
)
100mV
AC
Sine, f = 100kHz
100mV
AC
Sine, f = 100kHz
At 10kHz
MIN
TYP
2.5
2
70
53
150
MAX
UNITS
µs
μs
dB
dB
nV/
√
Hz
V
CIP_IN
0.08
V
Input Offset Voltage
Hysteresis
COP Output Voltage
Swing High
COP Output Voltage
Swing Low
Propagation Delay
V
OS_CMP
V
HYS
V
OH_CMP
V
OL-CMP
t
PDL->H
t
PDH->L
80mV ≤ V
CIP
≤ min
(V
REF
- 80mV, V
DD
- 1.25V)
80mV ≤ V
CIP
≤ min
(V
REF
- 80mV, V
DD
- 1.25V)
Sourcing 2mA; V
OH_CMP
= V
DD
- V
COP
Sinking 4mA; V
OL_CMP
= V
COP
- GND
200mV overdrive, low-to-high
200mV overdrive, high-to-low
mV
mV
V
V
µs
Note 1:
Limits are 100% tested at T
A
= +25°C. Limits over the operating temperature range and relevant supply voltage range are
guaranteed by design and characterization.
Note 2:
Guaranteed by design and bench characterization.
www.maximintegrated.com
Maxim Integrated | 4
MAX40056F/
MAX40056T/MAX40056U
Bidirectional Current Sense
Amplifier with PWM-Rejection
Typical Operating Characteristics
(V
DD
= 3.3V, V
SENSE
= 20mV, V
CM
= 48V, OUT LOAD = 10kΩ and 20pF to GND, COP LOAD = 5kΩ and 10pF to GND, T
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