MCS1802
3.3V, Linear Hall-Effect Current Sensor
with ±2.5% Accuracy Over Temperature
DESCRIPTION
FEATURES
The MCS1802 is a linear Hall-effect current
sensor for AC or DC current sensing. The Hall
array is differential, which cancels out any stray
magnetic field.
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•
•
•
•
•
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•
A primary conductor with a low resistance allows
current to flow close to the IC, which contains
high-accuracy Hall-effect sensors. This current
generates a magnetic field that is sensed at two
different points by the integrated Hall-effect
transducers. The magnetic field difference
between these two points is then converted into
a voltage that is proportional to the applied
current. A spinning current technique is used for
a low and stable offset.
3.3V Single Supply
Immune to External Magnetic Fields by
Differential Sensing
2.2kVRMS Minimum Isolation Voltage
Operating Temperature: -40°C to +125°C
0.9mΩ Internal Conductor Resistance
±5A to ±50A Bi-directional Range
Adjustable Bandwidth up to 100kHz
4μs Output Rising Time
Ratiometric Output from Supply Voltage
Output Proportional to AC or DC Currents
Factory-Trimmed for Accuracy
No Magnetic Hysteresis
Available in an SOIC-8 Package
The galvanic isolation between the pins of the
primary conductive path and the sensor leads
allows the MCS1802 to replace opto-isolators or
other isolation devices.
The MCS1802 requires a minimal number of
readily available, standard external components.
The device’s small footprint saves board area
and makes it well-suited for space-constrained
applications. The MCS1802 is available in an
SOIC-8 package.
APPLICATIONS
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Motor Control
Automotive Systems
Load Detection and Management
Switch-Mode Power Supplies
Over-Current Fault Protection
All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive.
For MPS green status, please visit the MPS website under Quality Assurance.
“MPS”, the MPS logo, and “Simple, Easy Solutions” are trademarks of
Monolithic Power Systems, Inc. or its subsidiaries.
TYPICAL APPLICATION
MCS1802
1
2
IP+
VCC
IP+
VOUT
IP-
FILT
3.3V
8
7
VOUT
CBYP
IP
3
4
IP-
GND
6
5
CF
Note:
1) VOUT is proportional to IP within the specified range. The noise vs. bandwidth tradeoff can be adjusted by connecting a capacitor (CF) between
FILT and GND.
MCS1802 Rev. 1.1
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
ORDERING INFORMATION
Part Number*
Optimized Primary
Current Range (A)
Typ Sensitivity
(SENS)(mV/A)
Top Marking
MCS1802GS-05
±5
264
MC180205
MCS1802GS-10
±10
132
MC180210
MCS1802GS-20
±20
66
MC180220
MCS1802GS-30
±30
44
MC180230
MCS1802GS-40
±40
33
MC180240
MCS1802GS-50
±50
26.4
MC180250
MSL
Rating
1
* For Tape & Reel, add suffix –Z (e.g. MCS1802GS-05–Z).
TOP MARKING (MCS1802GS-05)
MC180205: Part number
LLLLLLLL: Lot number
MPS: MPS prefix
Y: Year code
WW: Week code
TOP MARKING (MCS1802GS-10)
MC180210: Part number
LLLLLLLL: Lot number
MPS: MPS prefix
Y: Year code
WW: Week code
MCS1802 Rev. 1.1
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
TOP MARKING (MCS1802GS-20)
MC180220: Part number
LLLLLLLL: Lot number
MPS: MPS prefix
Y: Year code
WW: Week code
TOP MARKING (MCS1802GS-30)
MC180230: Part number
LLLLLLLL: Lot number
MPS: MPS prefix
Y: Year code
WW: Week code
TOP MARKING (MCS1802GS-40)
MC180240: Part number
LLLLLLLL: Lot number
MPS: MPS prefix
Y: Year code
WW: Week code
MCS1802 Rev. 1.1
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
TOP MARKING (MCS1802GS-50)
MC180250: Part number
LLLLLLLL: Lot number
MPS: MPS prefix
Y: Year code
WW: Week code
PACKAGE REFERENCE
TOP VIEW
IP+
1
8
VCC
IP+
2
7
VOUT
IP-
3
6
FILT
IP-
4
5
GND
SOIC-8 (5mmx4mm)
MCS1802 Rev. 1.1
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
PIN FUNCTIONS
Pin #
Name
1, 2
IP+
3, 4
IP-
5
GND
6
FILT
7
VOUT
8
VCC
Description
Primary current (+). IP+ is a terminal for the current being sampled. These pins are internally
connected together.
Primary current (-). IP- is a terminal for the current being sampled. These pins are internally
connected together.
Ground. Signal ground terminal.
Filter. FILT is a terminal for the external capacitor (CF), which sets the bandwidth. FILT can
be left floating when the bandwidth setting is not required.
Analog output.
Voltage supply. Connect VCC to a 3.3V power supply. Bypass with a 1µF low ESR ceramic
capacitor as close to VCC pin as possible.
ABSOLUTE MAXIMUM RATINGS (2)
Recommended Operating Conditions (3)
Supply voltage (VCC) .......................-0.1V to +6V
Output voltage (VOUT) ......................-0.1V to +6V
VFILT .................................................-0.1V to +6V
Junction temperature ................................165°C
Lead temperature .....................................260°C
Storage temperature ................ -65°C to +165°C
Supply voltage (VCC) ....................... 3.0V to 3.6V
Operating junction temp (TJ). ....-40°C to +125°C
Notes:
2)
3)
Exceeding these ratings may damage the device.
The device is not guaranteed to function outside of its
operating conditions.
ESD Ratings
Human body model (HBM) ........................ ±2kV
Charged device model (CDM) ................... ±2kV
MCS1802 Rev. 1.1
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
ISOLATION CHARACTERISTICS
Parameters
Dielectric surge
strength test voltage
Symbol Condition
Rating
Units
VSURGE
Test ±5 pulses at 2/minute, 1.2µs (rise)/50µs (width)
according to IEC61000-4-5.
6000
V
Withstand isolation
voltage
VISO
Agency type-tested for 60 seconds in accordance with
IEC62368-1. 100% Tested in production in accordance
with IEC 62368-1.
2200
VRMS
Maximum isolation
working voltage
VIOWM
Maximum approved working voltage for basic isolation,
according to IEC62368-1.
350
VPK or VDC
250
VRMS
External clearance
CLR
Shortest distance through the air from the IP leads to the
signal leads.
4.2
mm
External creepage
CPG
Shortest distance along the package body from the IP
leads to the signal leads.
4.2
mm
WITHSTANDING CURRENT CAPABILITY
Parameters
Symbol
Surge current test
ISURGE
Transient current
test (4)
ITRANSIENT
Condition
Rating
Test ±5 pulses at 2/minute, 8µs (rise) / 20µs (width),
3000
according to IEC61000-4-5
Single peak, 10ms
250
Units
A
A
Note:
4) For the detailed transient current capability test, refer to MPS application note AN178, available on the MPS website.
MCS1802 Rev. 1.1
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
MCS1802 COMMON ELECTRICAL CHARACTERISTICS
VCC = 3.3V, TJ = -40°C to +125°C, unless otherwise noted. Typical values at TJ = 25°C.
Parameters
Supply voltage
VCC under-voltage
lockout threshold
VCC under-voltage
lockout hysteresis
Operating supply current
Output capacitance load
Symbol
Condition
VCC
VCC_UVLO
Min
Typ (5)
Max
Units
3.6
V
2.5
3
V
400
750
mV
8.5
10.5
mA
10
nF
3.0
VCC rising
2
VCC_UVLO_HYS
ICC
VCC = 3.3V
(9)
CL
From VOUT to GND
Output resistive load (9)
RL
From VOUT to GND
Primary conductor
resistance (10)
RP
Effective
0.9
mΩ
Frequency bandwidth
fBW
FILT unconnected
100
kHz
Internal filter resistance
RFi
1.5
kΩ
Internal filter capacitance
CFi
1
nF
Power-on time
tPO
IP = IPMAX, FILT unconnected
90
µs
Rise time
tR
IP = IPMAX, FILT unconnected
4
µs
Propagation delay
tPD
IP = IPMAX, FILT unconnected
1.5
µs
tRESPONSE
IP = IPMAX, FILT unconnected
5
µs
Response time
kΩ
4.7
Noise density
IND
Input referenced noise
density
200
µA(RMS)/
√Hz
Noise
IN
Input referred, 1nF on FILT
(60kHz bandwidth)
50
mA(RMS)
Across the full IP range
0.5
%
Nonlinearity
Ratiometry
Zero current output
voltage
First Hall magnetic
coupling factor
Second Hall magnetic
coupling factor
Hall plate matching
Saturation voltage (6) (9)
ELIN
KSENS
KV0
VOUT(Q)
VCC = 3.0 to 3.6V
98
100
102
%
VCC = 3.0 to 3.6V, IP = 0A
99
100
101
%
IP = 0A
VCC / 2
V
PMCF1
0.6
mT/A
PMCF2
0.3
mT/A
MH
±1
%
VOUT(H)
RL = 4.7kΩ, TJ = 25°C
VOUT(L)
RL = 4.7kΩ, TJ = 25°C
VCC 0.3
V
0.3
MCS1802 Rev. 1.1
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V
7
MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
MCS1802-05 PERFORMANCE CHARACTERISTICS
VCC = 3.3V, TJ = -40°C to +125°C, unless otherwise noted.
Parameters
Optimized accuracy range (7)
Sensitivity
Sensitivity error
Offset voltage (8)
Total output error
Symbol Condition
IP
SENS -5A ≤ IP ≤ +5A, TJ = 25°C
IP = 5A, TJ = 25°C to 125°C
ESENS
IP = 5A, TJ = -40°C to +25°C
IP = 0A, TJ = 25°C to 125°C
VOE
IP = 0A, TJ = -40°C to +25°C
ETOT
IP = 5A, TJ = 25°C to 125°C
Min
-5
Typ (5)
Max
+5
264
-2
+2
±1.5
-15
+15
±5
-2.5
IP = 5A, TJ = -40°C to +25°C
+2.5
Units
A
mV/A
%
%
mV
mV
%
±1.5
%
Sensitivity error lifetime drift
ESENS(D)
±1
%
Total output error lifetime drift
ETOT(D)
±1
%
MCS1802-10 PERFORMANCE CHARACTERISTICS
VCC = 3.3V, TJ = -40°C to +125°C, unless otherwise noted.
Parameters
Optimized accuracy range (7)
Sensitivity
Sensitivity error
Offset voltage (8)
Total output error
Symbol Condition
IP
SENS -10A ≤ IP ≤ +10A, TJ = 25°C
IP = 10A, TJ = 25°C to 125°C
ESENS
IP = 10A, TJ = -40°C to +25°C
IP = 0A, TJ = 25°C to 125°C
VOE
IP = 0A, TJ = -40°C to +25°C
ETOT
IP = 10A, TJ = 25°C to 125°C
IP = 10A, TJ = -40°C to +25°C
Min
-10
Typ (5)
Max
+10
132
-2
+2
±1.5
-10
+10
±5
-2.5
+2.5
Units
A
mV/A
%
%
mV
mV
%
±1.5
%
Sensitivity error lifetime drift
ESENS(D)
±1
%
Total output error lifetime drift
ETOT(D)
±1
%
MCS1802 Rev. 1.1
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7/19/2022
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
MCS1802-20 PERFORMANCE CHARACTERISTICS
VCC = 3.3V, TJ = -40°C to +125°C, unless otherwise noted.
Parameters
Optimized accuracy range (7)
Sensitivity
Sensitivity error
Offset voltage (8)
Total output error
Symbol Condition
IP
SENS -20A ≤ IP ≤ +20A, TJ = 25°C
IP = 20A, TJ = 25°C to 125°C
ESENS
IP = 20A, TJ = -40°C to +25°C
IP = 0A, TJ = 25°C to 125°C
VOE
IP = 0A, TJ = -40°C to +25°C
ETOT
IP = 20A, TJ = 25°C to 125°C
Min
-20
Typ (5)
Max
+20
66
-2
+2
±1.5
-10
+10
±5
-2.5
IP = 20A, TJ = -40°C to +25°C
+2.5
Units
A
mV/A
%
%
mV
mV
%
±1.5
%
Sensitivity error lifetime drift
ESENS(D)
±1
%
Total output error lifetime drift
ETOT(D)
±1
%
MCS1802-30 PERFORMANCE CHARACTERISTICS
VCC = 3.3V, TJ = -40°C to +125°C, unless otherwise noted.
Parameters
Optimized accuracy range (7)
Sensitivity
Sensitivity error
Offset voltage (8)
Total output error
Symbol Condition
IP
SENS -30A ≤ IP ≤ +30A, TJ = 25°C
IP = 30A, TJ = 25°C to 125°C
ESENS
IP = 30A, TJ = -40°C to +25°C
IP = 0A, TJ = 25°C to 125°C
VOE
IP = 0A, TJ = -40°C to +25°C
ETOT
IP = 30A, TJ = 25°C to 125°C
IP = 30A, TJ = -40°C to +25°C
Min
-30
Typ (5)
Max
+30
44
-2
+2
±1.5
-10
+10
±5
-2.5
+2.5
Units
A
mV/A
%
%
mV
mV
%
±1.5
%
Sensitivity error lifetime drift
ESENS(D)
±1
%
Total output error lifetime drift
ETOT(D)
±1
%
MCS1802 Rev. 1.1
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
MCS1802-40 PERFORMANCE CHARACTERISTICS
VCC = 3.3V, TJ = -40°C to +125°C, unless otherwise noted.
Parameters
Optimized accuracy range (7)
Sensitivity
Sensitivity error
Offset voltage (8)
Total output error
Symbol Condition
IP
SENS -40A ≤ IP ≤ +40A, TJ = 25°C
IP = 40A, TJ = 25°C to 125°C
ESENS
IP = 40A, TJ = -40°C to +25°C
IP = 0A, TJ = 25°C to 125°C
VOE
IP = 0A, TJ = -40°C to +25°C
ETOT
IP = 40A, TJ = 25°C to 125°C
Min
-40
Typ (5)
Max
+40
33
-2
+2
±1.5
-10
+10
±5
-2.5
IP = 40A, TJ = -40°C to +25°C
+2.5
Units
A
mV/A
%
%
mV
mV
%
±1.5
%
Sensitivity error lifetime drift
ESENS(D)
±1
%
Total output error lifetime drift
ETOT(D)
±1
%
MCS1802-50 PERFORMANCE CHARACTERISTICS
VCC = 3.3V, TJ = -40°C to +125°C, unless otherwise noted.
Parameters
Optimized accuracy range (7)
Sensitivity
Sensitivity error
Offset voltage (8)
Total output error
Symbol Condition
IP
SENS -50A ≤ IP ≤ +50A, TJ = 25°C
IP = 50A, TJ = 25°C to 125°C
ESENS
IP = 50A, TJ = -40°C to +25°C
IP = 0A, TJ = 25°C to 125°C
VOE
IP = 0A, TJ = -40°C to +25°C
ETOT
IP = 50A, TJ = 25°C to 125°C
IP = 50A, TJ = -40°C to +25°C
Min
-50
Typ (5)
Max
+50
26.4
-2
+2
±1.5
-10
+10
±5
-2.5
+2.5
Units
A
mV/A
%
%
mV
mV
%
±1.5
%
Sensitivity error lifetime drift
ESENS(D)
±1
%
Total output error lifetime drift
ETOT(D)
±1
%
Notes:
5) Typical values denoted with the “±” sign signify ±3 sigma values.
6) Beyond the maximum specified current range (IP), the current sensor continues to provide an analog output voltage proportional to the primary
current until the device reaches the high or low saturation voltage. However, the nonlinearity increases beyond the specified range (IP).
7) The device can operate at higher primary current levels (IP) and ambient temperatures (TA), as long as the maximum junction temperature
(TJ (MAX)) is not exceeded.
8) The offset voltage does not incorporate any error due to the external magnetic fields.
9) Guaranteed by design and characterization.
10) The resistance is defined as the total resistance measured from a point of the lead next to the solder joint, assuming that the two IP+ pins
(and IP- pins) have the same potential (see Figure 1). This definition corresponds to the effect resistance used to estimate the joule heating,
calculated with R x IP2.
Figure 1: Total Resistance
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
TYPICAL CHARACTERISTICS
MCS1802GS-50, unless otherwise noted.
Sensitivity vs. Temperature
6
26.900
4
26.800
2
0
mean
-3sigma
+3sigma
-2
-4
SENSITIVITY (mV/A)
OFFSET (mV)
Offset Voltage vs. Temperature
26.700
26.600
26.500
26.400
-6
-60 -40 -20
0
26.200
20 40 60 80 100 120 140
-60 -40 -20 0
TEMPERATURE (°C)
Total Error vs. Temperature
2.000
1.500
1.500
1.000
0.500
0.000
mean
-3sigma
+3sigma
-1.000
TOTAL ERROR (%)
2.000
-0.500
20 40 60 80 100 120 140
TEMPERATURE (°C)
Sensitivity Error vs. Temperature
SENSITIVITY ERROR (%)
mean
-3sigma
+3sigma
26.300
1.000
0.500
0.000
mean
-3sigma
+3sigma
-0.500
-1.000
-60 -40 -20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
-60 -40 -20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
TYPICAL CHARACTERISTICS
MCS1802GS-40, unless otherwise noted.
Offset Voltage vs. Temperature
Sensitivity vs. Temperature
4
2
0
-2
Mean
-3sigma
+3sigma
-4
SENSITIVITY (mV/A)
OFFSET VOLTAGE (mV)
6
-6
33.6
33.5
33.4
33.3
33.2
33.1
33
32.9
32.8
32.7
32.6
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
Sensitivity Error vs. Temperature
Total Error vs. Temperature
2
1.5
1
0.5
0
-1
Mean
-3sigma
+3sigma
-1.5
TOTAL ERROR (%)
SENSITIVITY ERROR (%)
2
-0.5
Mean
-3sigma
+3sigma
1.5
1
0.5
0
-0.5
-1
Mean
-3sigma
+3sigma
-1.5
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
TYPICAL CHARACTERISTICS
MCS1802GS-30, unless otherwise noted.
Sensitivity vs. Temperature
Offset Voltage vs. Temperature
45
4
2
0
-2
-4
-6
Mean
-3sigma
+3sigma
SENSITIVITY (mV/A)
OFFSET VOLTAGE (mV)
6
44.8
44.6
44.4
44.2
44
43.8
43.6
-8
43.4
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
Sensitivity Error vs. Temperature
Total Error vs. Temperature
2
1.5
1
0.5
0
-1
Mean
-3sigma
+3sigma
-1.5
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
TOTAL ERROR (%)
SENSITIVITY ERROR (%)
2
-0.5
Mean
-3sigma
+3sigma
1.5
1
0.5
0
-0.5
-1
Mean
-3sigma
+3sigma
-1.5
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
TYPICAL CHARACTERISTICS
MCS1802GS-20, unless otherwise noted.
Offset Voltage vs. Temperature
Sensitivity vs. Temperature
4
2
0
Mean
-3sigma
+3sigma
-2
-4
SENSITIVITY (mV/A)
OFFSET VOLTAGE (mV)
6
-6
-60 -40 -20 0
67.2
67
66.8
66.6
66.4
66.2
66
65.8
65.6
65.4
65.2
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
20 40 60 80 100 120 140
TEMPERATURE (°C)
Sensitivity Error vs. Temperature
Total Error vs. Temperature
2
1.5
1
0.5
0
Mean
-3sigma
+3sigma
-1
TOTAL ERROR (%)
SENSITIVITY ERROR (%)
2
-0.5
Mean
-3sigma
+3sigma
1.5
1
0.5
0
-0.5
Mean
-3sigma
+3sigma
-1
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
TYPICAL CHARACTERISTICS
MCS1802GS-10, unless otherwise noted.
Offset Voltage vs. Temperature
6
4
2
0
-2
Mean
-3sigma
+3sigma
-4
-6
135
134.5
134
133.5
133
132.5
132
131.5
131
130.5
SENSITIVITY (mV/A)
OFFSET VOLTAGE (mV)
8
Sensitivity vs. Temperature
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
Sensitivity Error vs. Temperature
Total Error vs. Temperature
2
1.5
1
0
Mean
-3sigma
+3sigma
TOTAL ERROR (%)
SENSITIVITY ERROR (%)
2
0.5
Mean
-3sigma
+3sigma
1.5
1
0.5
0
Mean
-3sigma
+3sigma
-0.5
-0.5
-1
-1
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
TYPICAL CHARACTERISTICS
MCS1802GS-05, unless otherwise noted.
12
10
8
6
4
2
0
-2
-4
-6
-8
Sensitivity vs. Temperature
270
Mean
-3sigma
+3sigma
SENSITIVITY (mV/A)
OFFSET VOLTAGE (mV)
Offset Voltage vs. Temperature
268
266
264
262
260
258
-60 -40 -20 0
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
20 40 60 80 100 120 140
TEMPERATURE (°C)
Mean
-3sigma
+3sigma
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
Total Error vs. Temperature
TOTAL ERROR (%)
SENSITIVITY ERROR (%)
Sensitivity Error vs. Temperature
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
Mean
-3sigma
+3sigma
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
Mean
-3sigma
+3sigma
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE ( C)
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
FUNCTIONAL BLOCK DIAGRAM
3.3V
VCC
Regulator
Power Supply
Pre-Setting
POR
Hall
Driver
Temperature
Sensor
Control
Logic
IP+
Sensitivity
Control
Hall
Dynamic
Offset
Cancellation
VOUT
EA
+
Hall
IP
Offset
Control
-
IP+
CFi
IPIP-
VOUT
RFi
GND
MCS1802
FILT
CF
Figure 2: Functional Block Diagram
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
OPERATION
Current Rating
IPMAX is the rated current. The sensor output is
linear, as a function of the primary current (IP). IP
follows the specified performances when IP is
between -IPMAX and + IPMAX (see Figure 3).
VOUT
VCC
VCC / 2
0
-IPMAX
IP
0
+IPMAX
Figure 3: Sensor Output Function
Sensitivity (SENS)
The sensitivity (SENS) (in mV/A) indicates how
the output changes when the primary current
changes. SENS is the product of the average
between the two coupling constants (PMCF1 and
PMCF2) (in mT/A) and the transducer gain (in
mV/mT). The gain is factory-trimmed to the
sensor target sensitivity.
Coupling Constants (PMCF1 and PMCF2)
Figure 4 shows a cross-section of the sensor.
The first and second Hall magnetic coupling
factors are defined as the amount of the vertical
magnetic field (B1 and B2) produced at the
sensing points 1 and 2, per unit of current
injected in the primary conductor. Due to the
asymmetrical shape of the primary conductor,
the magnetic field generated at the two sensing
points are different.
B1
Sensing
Point 1
Primary
Conductor
Sensing
Point 2
B2
Figure 4: Cross Section of the Sensor
Noise (IN)
The noise (IN) is a random deviation that cannot
be removed by calibrating the device. The input’s
referred noise is the root mean square of the
sensor’s output noise (in mV) divided by the
sensitivity (in mV/A). IN represents the smallest
current that the device is able to resolve without
any external signal treatment.
Zero Current Output Voltage (VOUT(Q))
VOUT(Q) is the voltage output when the primary
current is 0A. The nominal value is VCC / 2.
Offset Voltage (VOE)
The offset voltage (VOE) is the difference
between VCC/2 and the zero current output
voltage VOUT(Q). The variation is due to thermal
drift, as well as the factory’s resolution limits
related to voltage offset trimming. To convert this
voltage into amperes, divide VOE by the
sensitivity.
Nonlinearity (ELIN)
The primary current and sensor output should
have a linear relationship, indicated by a straight
line. A line that is not straight indicates
nonlinearity, which is a deviation.
Nonlinearity (in %) can be calculated with
Equation (1):
ELIN =
Max(VOUT (IP ) − VLIN (IP ))
100
VOUT (IPMAX ) − VOUT ( −IPMAX )
(1)
Where VLIN(IP) is the approximate straight line
calculated by the least square method. Note that
depending on the curvature of VOUT(IP), ELIN can
be positive or negative.
Total Output Error (ETOT)
ETOT (in %) is the relative difference between the
sensor output and the ideal output at a given
primary current (IP). ETOT can be estimated with
Equation (2):
ETOT (IP ) =
VOUT (IP ) − VOUT _ IDEAL (IP )
Where VOUT_IDEAL
Equation (3):
SENS IP
can
VOUT_IDEAL (IP ) =
be
100 (2)
calculated
VCC
+ SENS IP
2
with
(3)
The total output error incorporates all error
sources, and is a function of IP. At currents close
to IPMAX, ETOT is affected mainly by the sensitivity
error. At currents close to 0A, ETOT is mostly
caused by the offset voltage (VOE). Note that
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
when IP = 0A, ETOT diverges to infinity due to the
constant offset.
Ratiometry Coefficients
Ideally, the sensor output is ratiometric. This
means that the sensitivity and the zero current
output scale with VCC. The ratiometry coefficients
measure if the sensitivity and zero output current
are proportional.
2. t2: VOUT reaches 20% of its final value, as it
corresponds to the applied primary current
(see Figure 6).
IP
IP_FINAL
VOUT_FINAL
VOUT
KSENS can be calculated with Equation (4):
K SENS =
SENS(VCC ) / SENS(3.3V)
VCC / 3.3V
(4)
K VO
tPD
20% of
VOUT_FINAL
KVO can be calculated with Equation (5):
V (I = 0, VCC ) / VOUT (IP = 0,3.3V)
= OUT P
VCC / 3.3V
20% of IP_FINAL
0 t1
(5)
Ideally, both KSENS and KVO are 1.
Power On Time (tPO)
The power on time (tPO) is the time interval after
power is first applied to the device, until the
output can correctly indicate the applied primary
current. tPO is defined as the time between the
following moments:
t2
t
Figure 6: Propagation Delay (tPD)
Rising Time (tR)
The rising time (tR) is defined as the time
between the following moments:
1. t1: The sensor’s VOUT reaches 10% of its fullscale value.
2. t2: The sensor’s VOUT reaches 90% of its fullscale value (see Figure 7).
1. t1: The supply reaches the minimum
operating voltage (VCC_UVLO).
IPMAX
2. t2: VOUT settles to 90% of its final value under
an applied primary current (see Figure 5).
90% of
VOUTMAX
IP
VOUT
VCC
VCC_TYP
90% of
VOUT_FINAL
VOUT
tR
10% of
VOUTMAX
VCC_UVLO
0
tPO
t1
t2
t
Figure 7: Rising Time (tR)
0
t1
t2
t
Figure 5: Power On Time (tPO)
Propagation Delay (tPD)
The propagation delay (tPD) represents the
internal latency between an event that has been
measured and the sensor’s response. tPD is
defined as the time between the following
moments:
1. t1: The primary current signal reaches 20%
of its final value.
The sensor bandwidth (fBW) is defined as the 3dB
cutoff frequency.
By using the rising time, fBW can be estimated
with Equation (6):
fBW = 0.35 / tR
(6)
Response Time (tRESPONSE)
The response time (tRESPONSE) is defined as the
time between the following moments:
1. t1: The primary current signal reaches 90%
of its final value.
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
2. t2: VOUT reaches 90% of its final value, as it
corresponds to the applied primary current
(see Figure 8).
90% of
IP_FINAL
IP
90% of
VOUT
VOUT_FINAL
Adjustable Bandwidth
The sensor dynamic can be adjusted with an
external capacitor (CF). In this scenario, the
bandwidth (fBW) can be calculated with Equation
(7):
fBW =
tRESPONSE
1
1
2 RFi (CFi + CF )
(7)
Where RFi is the internal filter resistance, CFi is
the internal filter capacitance.
Figure 9 shows the typical bandwidth curve.
0
t1
t2
t
Figure 8: Response Time (tRESPONSE)
Figure 9: Bandwidth vs. CF
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
APPLICATION INFORMATION
Self-Heating Performance
The conductor and MCS1802 temperatures can
rise when current flows through the primary
conductor. This means that self-heating should
be carefully verified to ensure that the IC junction
temperature does not exceed the maximum
value 165°C.
Figure 11 shows the top and bottom layers of the
PCB. The board includes a total of 2200mm2,
4oz (139µm) copper connected to the primary
conductor by the IP+ and IP- pins. The copper
covers both the top and bottom sides, and
thermal vias connect the two layers.
The thermal behavior strongly depends on the
thermal environment of the IC, as well as its
cooling capacity. In particular, thermal behavior
depends on the PCB copper area’s thickness.
The thermal response is also related to the
current waveform’s profile (e.g. the amplitude
and frequency of an AC current, or the peaks
and duty cycle of a pulsed DC current).
DIE TEMPERATURE CHANGE (℃)
Figure 10 shows the self-heating performance of
the MCS1802 with a DC current input. The data
is collected when the MCS1802 is mounted on
the device’s evaluation board and TA = 25°C.
Values were taken 10 minutes after a continuous
current.
Top Layer
120
100
80
60
40
20
0
0
10
20
30
40
50
PRIMARY DC CURRENT (A)
Bottom Layer
Figure 11: Recommended PCB Layout
Figure 10: Self-Heating Performance with a DC
Current Input
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
TYPICAL APPLICATION CIRCUIT
MCS1802
IP+
1
2
3
IP-
4
IP+
VCC
IP+
VOUT
IP-
FILT
IP-
GND
VCC
8
7
C1
1μF
VOUT
6
5
C2
(Optional,
GND
float if not used)
Figure 12: Typical Application Circuit
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
PACKAGE INFORMATION
SOIC-8
0.189(4.80)
0.197(5.00)
0.050(1.27)
0.024(0.61)
8
5
0.063(1.60)
0.150(3.80)
0.157(4.00)
PIN 1 ID
1
0.228(5.80)
0.244(6.20)
0.213(5.40)
4
TOP VIEW
RECOMMENDED LAND PATTERN
0.053(1.35)
0.069(1.75)
SEATING PLANE
0.004(0.10)
0.010(0.25)
0.013(0.33)
0.020(0.51)
SEE DETAIL "A"
0.050(1.27)
BSC
SIDE VIEW
FRONT VIEW
0.010(0.25)
x 45o
0.020(0.50)
GAUGE PLANE
0.010(0.25) BSC
0o-8o
DETAIL "A"
NOTE:
1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN
BRACKET IS IN MILLIMETERS.
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,
PROTRUSION, OR GATE BURR.
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH
OR PROTRUSIONS.
4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)
SHALL BE 0.004" INCHES MAX.
5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA.
6) DRAWING IS NOT TO SCALE.
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MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
CARRIER INFORMATION
1
Pin1
1
1
1
ABCD
ABCD
ABCD
ABCD
Feed Direction
Part Number
Package
Description
Quantity/
Reel
Quantity/
Tube
Quantity/
Tray
Reel
Diameter
MCS1802GS-05–Z
MCS1802GS-10–Z
MCS1802GS-20–Z
MCS1802GS-30–Z
MCS1802GS-40–Z
MCS1802GS-50–Z
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
2500
2500
2500
2500
2500
2500
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
13in
13in
13in
13in
13in
13in
Carrier
Tape
Width
12mm
12mm
12mm
12mm
12mm
12mm
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Carrier
Tape
Pitch
8mm
8mm
8mm
8mm
8mm
8mm
24
MCS1802 – 3.3V, LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
REVISION HISTORY
Revision #
1.0
1.1
Revision Date
4/14/2021
7/19/2022
Description
Initial Release
Added UL certification
Added the Withstanding Current Capability table and
Note 4
Adjusted the note numbers for the EC table
Updated the Noise (IN) section
Updated Figure 3
Updated Figure 5, Figure 6, and Figure 7
Updated the Power On Time (tPO), Propagation Delay
(tPD), and Rising Time (tR) sections
Updated the Response Time (tRESPONSE) section
Updated Figure 8
Updated the Self-Heating Performance section
Pages Updated
1
6
7–10
18
18
19
19
19–20
20
21
Notice: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third-party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
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25
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