MCS1806
3kVRMS Isolated Hall-Effect Current Sensor
with 500VRMS Working Voltage, ±2.5% Accuracy
DESCRIPTION
FEATURES
The MCS1806 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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A primary conductor with a low resistance allows
the 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, stable offset.
3.3V or 5V Single-Supply Options
Immune to External Magnetic Fields via
Differential Sensing
3kVRMS Minimum Isolation Voltage
500VRMS Maximum Working Voltage
±2.5% Total Accuracy
0.9mΩ Internal Conductor Resistance
±5A to ±50A Bidirectional Range
Adjustable Bandwidth Up to 100kHz
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 MCS1806 to replace optoisolators
and other isolation devices.
The MCS1806 requires a minimal number of
readily available, standard external components.
The device’s small SOIC-8 footprint saves board
area and makes it well-suited for spaceconstrained applications.
APPLICATIONS
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Multi-Phase Inverters
Motor Controls
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 (1)
VCC
1
2
IP+
IP+
VCC
VOUT
8
7
VOUT
CBYP
MCS1806
IP
3
4
IP-
IP-
FILT
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.
MCS1806 Rev. 1.1
MonolithicPower.com
9/8/2022
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2022 MPS. All Rights Reserved.
1
MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
ORDERING INFORMATION
Part Number*
MCS1806GS-3-05
MCS1806GS-3-10
MCS1806GS-3-20
MCS1806GS-3-30
MCS1806GS-3-40
MCS1806GS-3-50
MCS1806GS-5-05
MCS1806GS-5-10
MCS1806GS-5-20
MCS1806GS-5-30
MCS1806GS-5-40
MCS1806GS-5-50
Typ Supply
Voltage (V)
3.3
3.3
3.3
3.3
3.3
3.3
5
5
5
5
5
5
Optimized Primary
Current Range (A)
±5
±10
±20
±30
±40
±50
±5
±10
±20
±30
±40
±50
Typ Sensitivity
(Sens) (mV/A)
264
132
66
44
33
26.4
400
200
100
66
50
40
Top Marking
MSL Rating
MCS1806
1
* For Tape & Reel, add suffix -Z (e.g. MCS1806GS-3-05-Z).
TOP MARKING
MCS1806
LLLLLLLL
MPSYWW
MCS1806: 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)
MCS1806 Rev. 1.1
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MCS1806 – 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 pin for the current being sampled. The IP+ pins are
internally connected together.
Primary current (-). IP- is a terminal pin for the current being sampled. The IP- pins are
internally connected together.
Ground. Signal ground terminal pin.
Filter. FILT is a terminal pin for the external capacitor (CF), which sets the bandwidth. FILT can
be left floating if the bandwidth setting is not required.
Analog output.
Voltage supply. Bypass with a 1µF low-ESR ceramic capacitor, placed 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) for the 3.3V option.............
........................................................ 3.0V to 3.6V
Supply voltage (VCC) for the 5V option................
........................................................ 4.5V to 5.5V
Operating junction temp (TJ) .....-40°C to +125°C
ESD Ratings
Human body model (HBM) ........................ ±2kV
Charged device model (CDM) ................... ±2kV
Notes:
2)
3)
Exceeding these ratings may damage the device.
The device is not guaranteed to function outside of its
operating conditions.
MCS1806 Rev. 1.1
MonolithicPower.com
9/8/2022
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© 2022 MPS. All Rights Reserved.
3
MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
ISOLATION CHARACTERISTICS
Parameters
Dielectric surge
strength test voltage
Symbol Conditions
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 according to
IEC62368-1, 100% tested in production according to
IEC62368-1
3000
VRMS
Maximum isolation
working voltage
VIOWM
Maximum approved working voltage for basic isolation
according to IEC62368-1
700
500
VPK or VDC
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
Rating
Units
Test ±5 pulses at 2/minute, 8µs (rise)/20µs (width)
according to IEC61000-4-5
3000
A
Single peak, 10ms
250
A
WITHSTANDING CURRENT CAPABILITY
Parameters
Symbol
Surge current test
ISURGE
Transient current
test (4)
ITRANSIENT
Conditions
Note:
4)
For the detailed transient current capability test, refer to MPS application note AN178, available on the MPS website.
MCS1806 Rev. 1.1
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© 2022 MPS. All Rights Reserved.
4
MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
MCS1806 COMMON ELECTRICAL CHARACTERISTICS
VCC = 3.3V for 3.3V option and VCC = 5V for 5V option, TJ = -40°C to +125°C, typical values at
TJ = 25°C, unless otherwise noted.
Parameters
Supply voltage
VCC under-voltage lockout
(UVLO) threshold
VCC UVLO hysteresis
Operating supply current
Output capacitance load (9)
Output resistive load (9)
Internal filter resistance
Internal filter capacitance
Primary conductor
resistance (10)
Frequency bandwidth
Power-on time
Rising time
Propagation delay
Response time
Symbol
VCC
VCC_UVLO
Max
3.6
5.5
Units
V
V
2
2.5
3
V
400
8.5
750
10.5
10
1.5
1
mV
mA
nF
kΩ
kΩ
nF
4.7
0.9
mΩ
fBW
tPO
tR
tPD
FILT disconnected
IP = IPMAX, FILT disconnected
IP = IPMAX, FILT disconnected
IP = IPMAX, FILT disconnected
IP = IPMAX, FILT disconnected
100
90
4
1.5
5
Input referred noise density
200
kHz
µs
µs
µs
µs
µA(RMS)/
√Hz
tRESPONSE
IN
First Hall magnetic coupling
factor
Second Hall magnetic
coupling factor
Hall plate matching
Typ (5)
Effective
Noise
Zero-current output voltage
Min
3
4.5
RP
IND
Ratiometry coefficients (9)
VCC rising
VCC_UVLO_HYS
ICC
CL
From VOUT to GND
RL
From VOUT to GND
RFI
CFI
Noise density
Nonlinearity
Condition
3.3V option
5V option
ELIN
KSENS
KVO
VOUT(Q)
Input referred, 1nF on FILT
(60kHz bandwidth)
Across full IP range
50
mA(RMS)
0.5
%
VCC from VCC_MIN to VCC_MAX
98
100
102
%
VCC from VCC_MIN to VCC_MAX
99
100
101
%
IP = 0A
VCC / 2
V
PMCF1
0.6
mT/A
PMCF2
0.3
mT/A
MH
±1
%
3.3V option, RL = 4.7kΩ
VOUT(H)
5V option, RL = 4.7kΩ
Saturation voltage (6) (9)
VOUT(L)
VCC 0.3
VCC 0.5
3.3V option, RL = 4.7kΩ
5V option, RL = 4.7kΩ
MCS1806 Rev. 1.1
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V
V
0.3
0.5
V
V
5
MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
MCS1806-3-05 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
%
MCS1806-3-10 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
Min
-10
Typ (5)
Max
+10
132
-2
+2
±1.5
-10
+10
±5
-2.5
IP = 10A, 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
%
MCS1806-3-20 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
IP = 20A, TJ = -40°C to +25°C
Min
-20
Typ (5)
Max
+20
66
-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
%
MCS1806 Rev. 1.1
MonolithicPower.com
9/8/2022
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© 2022 MPS. All Rights Reserved.
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MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
MCS1806-3-30 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
Min
-30
Typ (5)
Max
+30
44
-2
+2
±1.5
-10
+10
±5
-2.5
IP = 30A, 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
%
MCS1806-3-40 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
%
MCS1806-3-50 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
%
MCS1806 Rev. 1.1
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9/8/2022
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MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
MCS1806-5-05 PERFORMANCE CHARACTERISTICS
VCC = 5V, 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
400
-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
%
MCS1806-5-10 PERFORMANCE CHARACTERISTICS
VCC = 5V, TJ = -40°C to +125°C, unless otherwise noted.
Parameters
Optimized accuracy range (7)
Sensitivity
Sensitivity error
Symbol
IP
SENS
ESENS
Offset voltage (8)
VOE
Total output error
ETOT
Condition
-10A ≤ IP ≤ +10A, TJ = 25°C
IP = 10A, TJ = 25°C to 125°C
IP = 10A, TJ = -40°C to +25°C
IP = 0A, TJ = 25°C to 125°C
IP = 0A, TJ = -40°C to +25°C
IP = 10A, TJ = 25°C to 125°C
Min
-10
Typ (5)
Max
+10
200
-2
+2
±1.5
-15
+15
±5
-2.5
IP = 10A, 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
%
MCS1806-5-20 PERFORMANCE CHARACTERISTICS
VCC = 5V, 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
IP = 20A, TJ = -40°C to +25°C
Min
-20
Typ (5)
Max
+20
100
-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
%
MCS1806 Rev. 1.1
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9/8/2022
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MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
MCS1806-5-30 PERFORMANCE CHARACTERISTICS
VCC = 5V, 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
Min
-30
Typ (5)
Max
+30
66
-2
+2
±1.5
-10
+10
±5
-2.5
IP = 30A, 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
%
MCS1806-5-40 PERFORMANCE CHARACTERISTICS
VCC = 5V, 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
IP = 40A, TJ = -40°C to +25°C
Min
-40
Typ (5)
Max
+40
50
-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
%
MCS1806 Rev. 1.1
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9/8/2022
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2022 MPS. All Rights Reserved.
9
MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
MCS1806-5-50 PERFORMANCE CHARACTERISTICS
VCC = 5V, 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
IP = 50A, TJ = 25°C to 125°C
ETOT
IP = 50A, TJ = -40°C to +25°C
Min
-50
Typ (5)
Max
+50
40
-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)
6)
7)
8)
9)
10)
Typical values denoted with the “±” sign signify ±3 sigma values..
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).
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.
The offset voltage does not incorporate any error due to the external magnetic fields.
Guaranteed by design and characterization.
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 effective resistance used to estimate the Joule
heating, calculated with R x IP2.
Figure 1: Total Resistance
MCS1806 Rev. 1.1
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MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
FUNCTIONAL BLOCK DIAGRAM
VCC
VCC
Regulator
Power Supply
Pre-Setting
POR
Hall
Driver
Temperature
Sensor
Control
Logic
IP+
Hall
Dynamic
Offset
Cancellation
Offset
Control
VOUT
EA
+
Hall
IP
Sensitivity
Control
-
MCS1806
IP+
VOUT
RFi
CFi
IP-
GND
IPFILT
CF
Figure 2: Functional Block Diagram
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MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
OPERATION
Current Rating
IPMAX is the rated current. The sensor output is
linear, and is a function of the primary current
(IP). IP follows the specified performances when
IP is between -IPMAX and + IPMAX (see Figure 3).
Beyond the rated current (IPMAX), the current
sensor continues to provide an analog output
voltage (VOUT) proportional to the primary current
until the device reaches the high or low
saturation voltage. However, the nonlinearity
increases beyond the specified range (IPMAX).
VOUT
VCC / 2
0
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’s 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 produced at the sensing points 1
and 2 (B1 and B2, respectively), per unit of
current injected into the primary conductor. Due
to the asymmetrical shape of the primary
conductor, the magnetic field generated in the
two sensing points is different.
B1
Sensing
Point 1
Primary
Conductor
Zero-Current Output Voltage (VOUT(Q))
VOUT(Q) is the output voltage 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 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.
VCC
-IPMAX
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 (RMS) of
the sensor’s output noise (in mV), divided by the
sensitivity (SENS, in mV/A). IN represents the
smallest current that the device is able to resolve
without any external signal treatment.
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 )
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)
The total output error (ETOT, in %) is the relative
difference between the sensor output and the
ideal output at a given primary current. ETOT can
be estimated with Equation (2):
ETOT (IP ) =
Sensing
Point 2
B2
(1)
VOUT (IP ) − VOUT_IDEAL (IP )
Where VOUT_IDEAL
Equation (3):
SENS IP
can
VOUT_IDEAL (IP ) =
be
VCC
2
100
calculated
+ SENS IP
(2)
with
(3)
Figure 4: Cross-Section of the Sensor
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MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
ETOT 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 when IP = 0A,
ETOT diverges to infinity due to the constant
offset.
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:
Ratiometry Coefficients
Ideally, the sensor output is ratiometric. This
means that the sensitivity and the zero-current
output scale with VCC. The ratiometry coefficients
(KSENS and KVO) measure whether the sensitivity
and zero-current output are proportional.
2. t2: VOUT reaches 20% of its final value, as it
corresponds to the applied primary current
(see Figure 6).
K SENS =
VCC / VCC_ TYP
IP
IP_FINAL
KSENS can be estimated with Equation (4):
SENS(VCC ) / SENS(VCC _ TYP )
1. t1: The primary current signal reaches 20%
of its final value.
VOUT_FINAL
VOUT
(4)
KVO can be calculated with Equation (5):
K VO =
VOUT (IP = 0, VCC ) / VOUT (IP = 0, VCC_ TYP )
VCC / VCC _TYP
20% of IP_FINAL
(5)
Where VCC_TYP = 3.3V for the 3.3V option, and
VCC_TYP = 5V for the 5V option.
Ideally both KSENS and KVO are 1.
Power-On Time (tPO)
The power-on time (tPO) is the time interval from
when 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:
tPD
20% of
VOUT_FINAL
0 t1
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).
2. t2: VOUT settles to 90% of its final value under
an applied primary current (see Figure 5).
IP
IPMAX
90% of
VOUTMAX
VOUT
VCC
VCC_TYP
90% of
VOUT_FINAL
VCC_UVLO
VOUT
tr
10% of
VOUTMAX
tPO
0
t1
t2
t
Figure 7: Rising Time (tR)
0
t1
t2
t
Figure 5: Power-On Time (tPO)
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MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
The sensor bandwidth (fBW) is defined as the 3dB
cutoff frequency. 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:
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 =
1
1
2 RFI (CFI + CF )
(7)
1. t1: The primary current signal reaches 90%
of its final value.
Where RFI is the internal filter resistance, and CFI
is the internal filter capacitance.
2. t2: VOUT reaches 90% of its final value, as it
corresponds to the applied primary current
(see Figure 8).
Figure 9 shows the typical bandwidth curve.
90% of
IP_FINAL
IP
90% of
VOUT_FINAL
VOUT
tRESPONSE
Figure 9: Bandwidth vs. CF
0
t1
t2
t
Figure 8: Response Time (tRESPONSE)
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MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
APPLICATION INFORMATION
Self-Heating Performance
The conductor and MCS1806 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 (TJ) does not exceed its maximum
threshold (165°C).
The thermal behavior strongly depends on the
IC’s thermal environment and cooling capacity.
In particular, thermal behavior depends on the
PCB copper area and thickness. The thermal
response is also related to the current. (e.g. the
amplitude and frequency of an AC current, or the
peaks and duty cycle of a pulsed DC current).
Recommended PCB Layout
Efficient PCB layout is critical for proper
operation. For the best results, refer to Figure 11
and follow the guidelines below:
1. The board should includes a total of
2200mm2, 4oz (139µm) copper connected to
the primary conductor via the IP+ and IPpins.
2. Ensure that the copper covers both the top
and bottom sides,
3. Use thermal vias to connect the two layers.
Figure 10 shows the self-heating performance of
the MCS1806 with a DC current input. This data
was collected with the part mounted on the
MCS1806 evaluation board (see Figure 11)
when TA = 25°C. Values were taken after 10
minutes of continuous current.
DIE TEMPERATURE CHANGE (℃)
120
100
80
Top Layer
60
40
20
0
0
10
20
30
40
50
PRIMARY DC CURRENT (A)
Figure 10: Self-Heating Performance with DC
Current Input
Bottom Layer
Figure 11: Recommended PCB Layout
MCS1806 Rev. 1.1
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MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
TYPICAL APPLICATION CIRCUIT
VCC
IP+
1
2
IP+
IP+
VCC
VOUT
8
C1
1μF
7
VOUT
MCS1806
3
IP-
4
IP-
FILT
IP-
GND
6
5
C2
(Optional,
float if not used)
GND
Figure 12: Typical Application Circuit
MCS1806 Rev. 1.1
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MCS1806 – 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 BURRS.
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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MCS1806 – 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
MCS1806GS-3-05-Z
MCS1806GS-3-10-Z
MCS1806GS-3-20-Z
MCS1806GS-3-30-Z
MCS1806GS-3-40-Z
MCS1806GS-3-50-Z
MCS1806GS-5-05-Z
MCS1806GS-5-10-Z
MCS1806GS-5-20-Z
MCS1806GS-5-30-Z
MCS1806GS-5-40-Z
MCS1806GS-5-50-Z
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
2500
2500
2500
2500
2500
2500
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
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
13in
13in
13in
13in
13in
13in
Carrier
Tape
Width
12mm
12mm
12mm
12mm
12mm
12mm
12mm
12mm
12mm
12mm
12mm
12mm
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Carrier
Tape
Pitch
8mm
8mm
8mm
8mm
8mm
8mm
8mm
8mm
8mm
8mm
8mm
8mm
18
MCS1806 – LINEAR HALL-EFFECT CURRENT SENSOR WITH ±2.5% ACCURACY
REVISION HISTORY
Revision #
1.0
Revision Date
7/7/2022
1.1
9/8/2022
Description
Initial Release
Increased the minimum isolation voltage from 2.6kVRMS
to 3kVRMS
Pages Updated
1, 5
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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19
