High Accuracy Current Sensor IC with
1.5MHz 3dB Bandwidth and Isolation
±5A, ±20A, ±50A, ±65A, 5V, Fixed Gain
MCA1101-xx-5
FEATURES
DESCRIPTION
The MCA1101 products are ±5A, ±20A, ±50A, ±65A fully
integrated bi-directional analog output current sensors that
deliver both high accuracy and high bandwidth. ACEINNA’s
state-of-the-art Anisotropic Magneto Resistive (AMR) sensor
technology provides inherently low noise, excellent linearity
and repeatability.
AMR based integrated current sensor
Superior Range & Accuracy
0.6% typical total error @25°C (MCA1101-20-5)
2.0% max error over temperature (MCA1101-20-5)
Superior Frequency Response
1.5 MHz (typical 3dB BW)
Fast output response time (300ns typical)
Low Primary Resistance (0.9 mΩ)
Single 5V Supply Operation
Low power consumption (6.5mA typical)
Zero-Current Reference Pin (Vref)
Overcurrent fault detection
SOIC-16 package (RoHS/REACH compliant)
-40 to +105°C Operating Temperature Range
UL/IEC/EN60950-1 Certified
4.8 kV Dielectric Strength Voltage
1097 VRMS Basic Isolation Voltage
400 VRMS Reinforced Isolation Voltage
APPLICATIONS
Server, Telecom, & Industrial PWR Supplies
Power Aggregation, Over-Current Protection
Dynamic Current Sensing in Feedback Loops
PFC and Inverter Control
Motor Control Loops & Protection
Automation, Robotics, Servo Systems
Automotive & EV Power Systems
Solar Inverters and Optimizers
Grid-Tie and Storage Current Monitoring
MPPT Circuit Current Monitoring
Central Inverter Current Monitoring
Consumer
Motor Balance and Remote Device Monitoring
Home Automation Control & IOT remote sensing
A fully isolated current path is provided by a low resistance
copper conductor integrated into the package making it
suitable for both high-side and low side bi-directional current
sensing. The high bandwidth of 1.5MHz (3dB) and low phase
delay makes it ideal for current sense feedback loops in motor
control, inverters, uninterruptible power supplies, battery
management, power factor correction, high voltage
distribution bus converters and power supply applications,
including those with fast switching wide-bandgap SiC and
GaN based power stages.
These devices are factory-calibrated to achieve low offset
error and provide a precise analog voltage output that is
linearly proportional to the conduction current (AC or DC) with
sensitivity (mV/A) compatible with A/D converters and analog
control loops in power systems. The AMR sensor device
structure is designed to eliminate sensitivity to stray and
common mode magnetic fields.
Due to the inherently low output noise of ACEINNA’s sensor
technology, additional filtering is not required to reduce noise
that reduces accuracy at low-level currents in systems with
dynamic load profiles.
The MCA1101 products in SOIC-16 package are simple to
use with no or minimal external components (other than
decoupling capacitor) enabling fast design, supports high
isolation and are UL/IEC/EN60950-1 certified.
VCC
R1
IP+
VOC
IP+ Primary Current
IP+ Input
GND
IP+
Vref
IP-
Vout
IP- Primary Current
IP- Output
GND
IP-
33K
R2
Optional circuitry for
overcurrent detection
GND
VCC
FAULTB
VCC
VCC
To ADC pin on
MCU or A/D input
To ADC pin on
MCU or A/D input
R3
C1
100nF
10K
Intterupt
to MCU
Figure 1 - Application circuit
Information furnished by ACEINNA is believed to be accurate and reliable. However, no responsibility is assumed by ACEINNA for its use, or for any infringements of patents
or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of ACEINNA. ACEINNA
reserves the right to change this specification without notification.
ORDERING PART NUMBER
Ordering
Part Number
Part Marking
(See Page 12)
Current
Range
Gain
VCC
(Typical)
Dielectric
Strength
Package
Qty per
Reel
MCA1101-5-5
MCA1101-20-5
MCA1101-50-5
MCA1101-65-5
MCA11055
MCA11205
MCA11505
MCA11656
±5 Amp
±20 Amp
±50 Amp
±65 Amp
Fixed
Fixed
Fixed
Fixed
5.0V
5.0V
5.0V
5.0V
4800V
4800V
4800V
4800V
16 Lead SOIC
16 Lead SOIC
16 Lead SOIC
16 Lead SOIC
1000 pcs
1000 pcs
1000 pcs
1000 pcs
Note: Evaluation boards are available for each product version (order EVB-MCx1101-xx-x)
PIN DESCRIPTION
Pin #
16L SOIC
Name
1,2,3,4
IP+
Input of Primary Current Path for Sensing, Fused internally
5,6,7,8
IP-
Output of Primary Current Path for Sensing, Fused internally
9
10
11
12
FAULTB
VCC
GND
Vout
13
Vref
14
GND
15
GND
16
VOC
Description
Overcurrent FAULTB open drain output. Active low.
System Power Supply
Recommended to connect to ground
Analog Output Signal linearly proportional to Primary Path Current
Pin 1
Zero Current Analog Reference Output
Used during initial factory calibration. This pin should be
connected to ground or left floating during normal operation.
Connect to ground
Input pin. Voltage on this pin defines the overcurrent detection
OCD threshold level. Briefly driving this pin to VCC resets and rearms OCD circuit.
16-pin SOIC
BLOCK DIAGRAM
Figure 2 - Block diagram for fixed gain output products
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Table 1 – ABSOLUTE MAXIMUM RATINGS
Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may
degrade device reliability. These are stress ratings only, and functional operation at these or any other conditions beyond those
specified is not implied.
Parameters / Test Conditions
Symbol
Value
Unit
Supply Voltage
VCCMAX
V
FAULTB Output Voltage
V FAULTB
-0.5 to 6
-0.5V to
VCC+0.5V
V
Sensor Current (IP+, IP-), 5Amp products
IPMAX
±10
A
Sensor Current (IP+, IP-), 20Amp products
IPMAX
±50
A
Sensor Current (IP+, IP-), 50Amp products
IPMAX
±100
A
Sensor Current (IP+, IP-), 65Amp products
IPMAX
±100
A
Maximum Device Junction Temperature
TJMAX
150
°C
Storage Temperature
TSTG
-65 to +150
°C
TA
-40 to 105
°C
ESD Human Body Model / per ANSI/ESDA/JEDEC JS-001
HBM
2000
V
ESD Charged Device Model / per JEDEC specification JESD22-C101
CDM
1500
V
MSL Rating
MSL
3
TSOLDER
260
Operating Ambient Temperature Range
Maximum Soldering Temperature, 10 seconds.
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Page 3 of 14
Table 2 – ISOLATION CHARACTERISTICS
Parameters / Test Conditions
Dielectric Strength Test Voltage (Agency type-tested for 60 seconds per UL
standard 60950-1 (edition 2). Production tested at 3kVrms per UL 60950-1.
Working Voltage for Basic Isolation. Maximum approved working voltage
according to UL 60950-1 (edition 2)- (VPK/DC / VRMS)
Symbol
Value
Unit
VISO
4800
V
VWVBI
1550 / 1097
V
VWVRI
565 / 400
V
Clearance distance (Minimum distance through air from IP leads to signal leads)
DCL
7.5
mm
Creepage distance (Minimum distance along package body from IP leads to
signal leads)
DCR
8.2
mm
Symbol
Value
Unit
Junction-to-Ambient Thermal Resistance (Note 1)
RJA
27
C/W
Junction-to-Lead Thermal Resistance
RJC
10
C/W
Working Voltage for Reinforced Isolation (VPK/DC / VRMS)
Table 3 – THERMAL CHARACTERISTICS
Parameters / Test Conditions
Note 1 – The RJA measured on the EB0011- evaluation board with 800mm2 of 4oz copper on each layer (top and bottom ), thermal
vias connecting the layers. The performance values include the power consumed by the PCB.
Table 4 – ELECTRICAL CHARACTERISTICS COMMON TO ALL VERSIONS
Unless otherwise noted: 4.5V ≤ VCC ≤ 5.5V, -40°C ≤ TA ≤ 105°C, I (Vout) = I (Vref) = 0 (Recommended Operating Conditions).
Typical values are for VCC = 5V and TA = 25°C.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
2
4
mV
Vout Output
Load Regulation
VoutLR
Increase I (Vout) from 0 to -250µA. Measure
change in Vout voltage
Source Current
VoutSRC
Vout shorted to GND
50
mA
Sink Current
VoutSNK
Vout shorted to VCC
30
mA
Frequency Response (-3dB)
VoutBW
(Note 2)
CVoutMAX
(Note 2)
Capacitive Loading
Resistive Loading
RLMIN
Response Time
tRESP
Noise Density
Noise (Input Referred)
IND
VoutNOISE
1500
kHz
200
Minimum load resistance on Vout & Vref.
(Note 2 and Note 3)
IP± = 0 to ±100% step input,
interval from 80% of the IP to 80% of the
Vout. (Note 2)
Input Referred, VCC=5V, TA = 25°C,
CL=200pF, 10 kHz~1MHz
IP± = 0, Measure (Vout – Vref).
BW defined from DC to 10 kHz. (Note 2)
10
pF
kohm
300
ns
10
µA/Hz
10
mA
(rms)
Note 2 – Guaranteed by design and characterization. Not production tested.
Note 3 – Vref pin supply capability limited to Fixed Gain mode.
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Table 5 – ELECTRICAL CHARACTERISTICS COMMON TO ALL VERSIONS
Unless otherwise noted: 4.5V ≤ VCC ≤ 5.5V, -40°C ≤ TA ≤ 105°C, I (Vout) = I (Vref) = 0 (Recommended Operating Conditions).
Typical values are for VCC = 5V and TA = 25°C.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
2.164
2.175
2.185
V
2
4
mV
Vref Output
Output Voltage
Vref
I (Vref) = 0 to -1mA, Fixed Gain Products
Load Regulation
VrefLR
Increase I (Vref) from 0 to -250µA. Measure
change in Vref voltage. (Note 3)
Source Current
VrefSRC
Vref shorted to GND. (Note 3)
10
mA
Sink Current
VrefSNK
Vref shorted to VCC. (Note 3)
10
mA
(Note 2)
100
pF
5.5
V
Capacitive Loading
CVrefMAX
VCC Bias Supply
Supply Voltage
VCC
4.5
Supply Current
IVCC
VCC=5.0 V
6.5
8
mA
Power Up Time
TVCC
Time from VCC > 4.5V to valid Vout and Vref
(Note 2)
0.75
1.25
ms
RPC
Measure resistance between IP+ and IPMCA1101-50, MCA1101-65 Versions (Note
2)
Measure resistance between IP+ and IPMCA1101-20, MCA1101-5 Versions (Note 2)
Primary Side Input
Primary Conductor
Resistance
0.9
mΩ
1.3
Note 2 – Guaranteed by design and characterization. Not production tested.
Note 3 – Vref pin supply capability limited to Fixed Gain mode.
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Table 6 – PERFORMANCE CHARACTERISTICS- 65A VERSIONS (MCA1101-65-5)
Unless otherwise noted: 4.5V < VCC < 5.5V, I(Vout) = I(Vref) = 0, Typical values are for VCC = 5V and TA = 25°C.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
+65
A
NOMINAL Vout TRANSFER FUNCTION
MCA1101-65-5, Vout = Vref + IIN x 27mV/A
Input Range
Sensitivity
IIN
GAIN
Calibrated Range
-65
MCA1101-65-5 (Fixed Gain)
27
mV/A
DC ACCURACY
IIN = 0, TA = 0C to 85C (Note 4)
-180
±40
120
IIN = 0, TA = -40C to 0C (Note 5)
-300
±100
300
IIN = IFS, TA = 0C to 85C (Note 4)
-1.5
±0.5
1.5
IIN = IFS, TA = -40C to 0C (Note 5)
-2.4
±0.8
2.4
IIN = IFS, TA = 0C to 85C (Note 4)
-1.5
±0.5
1.5
IIN = IFS, TA = -40C to 0C (Note 5)
-1.5
±0.5
1.5
IIN = ±15A ~ ±65A, TA = 0C to 85C (Note 4)
-7.5
±3.0
7.5
IIN = ±15A ~ ±65A, TA = -40C to 0C (Note 5)
-8.0
±4.0
8.0
IOFFSET(D)
(Note 6)
-300
70
300
mA
Sensitivity Drift
ES(D)
(Note 6)
-1.3
0.3
1.3
%
Total Error Drift
ETOT(D)
(Note 6)
-1.7
±0.4
1.7
%FS
Zero Current Offset
Sensitivity Error
Linearity Error
Total Error
IOFFSET
mA
ES
%
EL
%FS
ETOT
% RD
LIFETIME DRIFT CHARACTERISTICS
Zero Current Offset Drift
Note 4: Typ values are 1. Min/max values are guaranteed by production test
Note 5: Guaranteed by design and characterization. Typ values are 1, min/max values are 3.
Note 6: Worst case numbers are based on 3 lots qualification data, taking the worst shifts from among HTOL (1000 hours), HTSL (1000
hours), THB (1000 hours), and TCT (700 cycles). Typical numbers are 1 .
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Table 7 – PERFORMANCE CHARACTERISTICS- 50A VERSIONS (MCA1101-50-5)
Unless otherwise noted: 4.5V < VCC < 5.5V, I(Vout) = I(Vref) = 0, Typical values are for VCC = 5V and TA = 25°C.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
+50
A
NOMINAL Vout TRANSFER FUNCTION
MCA1101-50-5, Vout = Vref + IIN x 35mV/A
Input Range
Sensitivity
IIN
GAIN
Calibrated Range
-50
MCA1101-50-5 (Fixed Gain)
35
mV/A
DC ACCURACY
IIN = 0, TA = 0C to 85C (Note 4)
-120
±40
120
IIN = 0, TA = -40C to 0C (Note 5)
-300
±100
300
IIN = IFS, TA = 0C to 85C (Note 4)
-1.5
±0.5
1.5
IIN = IFS, TA = -40C to 0C (Note 5)
-2.4
±0.8
2.4
IIN = IFS, TA = 0C to 85C (Note 4)
-1.5
±0.5
1.5
IIN = IFS, TA = -40C to 0C (Note 5)
-1.5
±0.5
1.5
IIN = ±15A ~ ±50A, TA = 0C to 85C (Note 4)
-2.5
±1.5
2.5
IIN = ±15A ~ ±50A, TA = -40C to 0C (Note 5)
-3.6
±1.5
3.6
IOFFSET(D)
(Note 6)
-300
70
300
mA
Sensitivity Drift
ES(D)
(Note 6)
-1.3
0.3
1.3
%
Total Error Drift
ETOT(D)
(Note 6)
-1.7
±0.4
1.7
%FS
Zero Current Offset
Sensitivity Error
Linearity Error
Total Error
IOFFSET
mA
ES
%
EL
%FS
ETOT
% RD
LIFETIME DRIFT CHARACTERISTICS
Zero Current Offset Drift
Note 4: Typ values are 1. Min/max values are guaranteed by production test
Note 5: Guaranteed by design and characterization. Typ values are 1, min/max values are 3.
Note 6: Worst case numbers are based on 3 lots qualification data, taking the worst shifts from among HTOL (1000 hours), HTSL (1000
hours), THB (1000 hours), and TCT (700 cycles). Typical numbers are 1 .
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Table 8 – PERFORMANCE CHARACTERISTICS- 20A VERSIONS (MCA1101-20-5)
Unless otherwise noted: 4.5V < VCC < 5.5V, I(Vout) = I(Vref) = 0, Typical values are for VCC = 5V and TA = 25°C.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
+20
A
NOMINAL Vout TRANSFER FUNCTION
MCA1101-20-5, Vout = Vref + IIN x 90mV/A
Input Range
Sensitivity
IIN
GAIN
Calibrated Range
-20
MCA1101-20-5 (Fixed Gain)
90
mV/A
DC ACCURACY
IIN = 0, TA = 0C to 85C (Note 4)
-60
±20
60
IIN = 0, TA = -40C to 0C (Note 5)
-200
±60
200
IIN = IFS, TA = 0C to 85C (Note 4)
-0.7
±0.3
0.7
IIN = IFS, TA = -40C to 0C (Note 5)
-1.2
±0.4
1.2
IIN = IFS, TA = 0C to 85C (Note 4)
-0.7
±0.3
0.7
IIN = IFS, TA = -40C to 0C (Note 5)
-1.5
±0.5
1.5
IIN = ±6A ~ ±20A, TA = 0C to 85C (Note 4)
-2.0
± 0.6
2.0
IIN = ±6A ~ ±20A, TA = -40C to 0C (Note 5)
-3.0
±1.0
3.0
IOFFSET(D)
(Note 6)
-300
60
300
mA
Sensitivity Drift
ES(D)
(Note 6)
-1.2
0.3
1.2
%
Total Error Drift
ETOT(D)
(Note 6)
-2.0
±0.4
2.0
%FS
Zero Current Offset
Sensitivity Error
Linearity Error
Total Error
IOFFSET
mA
ES
%
EL
%FS
ETOT
% RD
LIFETIME DRIFT CHARACTERISTICS
Zero Current Offset Drift
Note 4: Typ values are 1. Min/max values are guaranteed by production test
Note 5: Guaranteed by design and characterization. Typ values are 1, min/max values are 3.
Note 6: Worst case numbers are based on 3 lots qualification data, taking the worst shifts from among HTOL (1000 hours), HTSL (1000
hours), THB (1000 hours), and TCT (700 cycles). Typical numbers are 1 .
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Table 9 – PERFORMANCE CHARACTERISTICS- 5A VERSIONS (MCA1101-5-5)
Unless otherwise noted: 4.5V < VCC < 5.5V, I(Vout) = I(Vref) = 0, Typical values are for VCC = 5V and TA = 25°C.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
+5
A
NOMINAL Vout TRANSFER FUNCTION
MCA1101-5-5, Vout = Vref + IIN x 350mV/A
Input Range
Sensitivity
IIN
GAIN
Calibrated Range
-5
MCA1101-5-5 (Fixed Gain)
350
mV/A
DC ACCURACY
IIN = 0, TA = 0C to 85C (Note 4)
-60
±20
60
IIN = 0, TA = -40C to 0C (Note 5)
-60
±20
60
IIN = IFS, TA = 0C to 85C (Note 4)
-1.0
±0.4
1.0
IIN = IFS, TA = -40C to 0C (Note 5)
-1.5
±0.5
1.5
IIN = IFS, TA = 0C to 85C (Note 4)
-0.5
±0.3
0.5
IIN = IFS, TA = -40C to 0C (Note 5)
-0.75
±0.4
0.75
IIN = ±3A ~ ±5A, TA = 0C to 85C (Note 4)
-2.0
±1.0
2.0
IIN = ±3A ~ ±5A, TA = -40C to 0C (Note 5)
-3.0
±2.0
3.0
IOFFSET(D)
(Note 6)
-300
70
300
mA
Sensitivity Drift
ES(D)
(Note 6)
-1.3
0.3
1.3
%
Total Error Drift
ETOT(D)
(Note 6)
-6
±1.5
6
%FS
Zero Current Offset
Sensitivity Error
Linearity Error
Total Error
IOFFSET
mA
ES
%
EL
%FS
ETOT
% RD
LIFETIME DRIFT CHARACTERISTICS
Zero Current Offset Drift
Note 4: Typ values are 1. Min/max values are guaranteed by production test
Note 5: Guaranteed by design and characterization. Typ values are 1, min/max values are 3.
Note 6: Worst case numbers are based on 3 lots qualification data, taking the worst shifts from among HTOL (1000 hours), HTSL (1000
hours), THB (1000 hours), and TCT (700 cycles). Typical numbers are 1 .
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Table 10 – OCD ELECTRICAL CHARACTERISTICS
Unless otherwise noted: 4.5V < VCC < 5.5V, -40°C ≤ TA ≤ 105°C, I(Vout) = I(Vref) = 0, Typical values are for VCC = 5V and TA = 25°C.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
OVERCURRENT FAULT CHARACTERISTICS
FAULTB Response Time
FAULTB Range
tRESPONSE
I FAULTB
Time from IP > I FAULTB to when FAULTB pin
is pulled below V FAULTB ; input current step
from 0 to 1.5 ×I FAULTB
For parts rated for IP=5A; VOC voltage
between 0V and 1.0V
For parts rated for IP=5A; VOC voltage
between 1.4V and 1.6V
For parts rated for IP=5A; VOC voltage
between 2.V0 and 2.5V
For parts rated for IP=20A; VOC voltage
between 0V and 1.0V
For parts rated for IP=20A; VOC voltage
between 1.4V and 2.5V
For parts rated for IP=50A; VOC voltage
between 0V and 2.5V
For parts rated for IP=65A; VOC voltage
between 0V and 2.5V
FAULTB Output Low
Voltage
V FAULTB
In fault condition; RFPU = 2-10 kΩ
FAULTB Output High
Voltage
V FAULTB
In fault condition; RFPU = 2-10 kΩ
FAULTB Pull-Up
Resistance
OCD Threshold Setting
Error
RFPU
VOC Input Range
0.2
6
7.5
10
24
A
30
60
78
0.2
2
V
VCC
V
10
kΩ
6
E FAULTB
VVOd
uS
For setting OCD trig threshold
0
VCC/2
V
VCC
V
VOC high input level to
reset OCD
VIHocd
VCC0.5
VOC High State Duration
THVOC
1
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%
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μs
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Page 10 of 14
AMR TECHNOLOGY
Anisotropic magnetoresistance (AMR) makes use of a common
material, Permalloy, to act as a magnetometer. Permalloy is an
alloy containing roughly 80% nickel and 20% iron. The alloy’s
resistance depends on the angle between the magnetization
and the direction of current flow. In a magnetic field,
magnetization rotates toward the direction of the magnetic field
and the rotation angle depends on the external field’s
magnitude. Permalloy’s resistance decreases as the direction of
magnetization rotates away from the direction in which current
flows, and is lowest when the magnetization is perpendicular to
the direction of current flow. The resistance changes roughly as
the square of the cosine of the angle between the magnetization
and the direction of current flow. Permalloy is deposited on a
silicon wafer and patterned as a resistive strip. The film’s
properties cause it to change resistance in the presence of a
magnetic field. In a current sensor application, two of these
resistors are connected in a Wheatstone bridge configuration to
permit the measurement of the magnitude of the magnetic field
produced by the current.
AMR properties are well behaved when the film’s magnetic
domains are aligned in the same direction. This configuration
ensures high sensitivity, good repeatability, and minimal
hysteresis. During fabrication, the film is deposited in a strong
magnetic field that sets the preferred orientation, or “easy” axis,
of the magnetization vector in the Permalloy resistors. AMR has
better sensitivity than other methods and reasonably good
temperature stability. The AMR sensor has sensitivity which is
approximately a linear function of temperature.
voltage threshold Vout and Vref are released and will drive to
approximately half the VCC supply voltage and an initial
calibration will commence. Once the initial calibration has
completed the MCA1101 becomes active. Vout will slew to
indicate the value of current flowing in the IP+/- conductor.
Current flow in the IP+/- conductor with a VCC voltage less than
the under-voltage threshold will not cause damage to the
sensor.
OVERCURRENT DETECTION (OCD)
The MCA1101 have fast and accurate overcurrent fault
detection circuitry. The overcurrent fault threshold (I FAULTB ) is
user-configurable via an external resistor divider and supports a
range of 120% to 200% of the full-scale primary input (IP).
The overcurrent fault threshold (I FAULTB ) is set via a resistor
divider from VCC to ground on the VOC pin. The voltage on the
VOC pin (VVOC), may range from 0 ×VCC to 0.5 ×VCC.
For +/-5A parts
For VVOC between 0 ×VCC and 0.225 ×VCC the I
threshold level is 1.2×IP.
For VVOC between 0.225 ×VCC and 0.35 ×VCC the I
threshold level is 1.5×IP.
For VVOC between 0.35 ×VCC and 0.5×VCC the I
threshold level is 2×IP.
For +/-20A parts
For VVOC between 0 ×VCC and 0.225 ×VCC the I
threshold level is 1.2×IP.
For VVOC between 0.225 ×VCC and 0.5 ×VCC the I
threshold level is 1.5×IP.
FAULTB
FAULTB
FAULTB
FAULTB
FAULTB
FUNCTIONAL DESCRIPTION
Figure 2 provide block diagrams of the fixed gain. The AMR
sensor monitors the magnetic field generated by the current
flowing through the U shaped IP+/IP- package lead frame. The
AMR sensor produces a voltage proportional to the magnetic
field created by the positive or negative current in the IP+/IPcurrent loop while rejecting external magnetic interference. The
sensor voltage is fed into a differential amplifier whose gain is
temperature compensated. This is followed by an
instrumentation amplifier output stage that provides a voltage
that indicates the current passing through the IP+/IP- pins. To
provide both positive and negative current data the Vout output
pin is referenced to the Vref output pin. The voltage on the Vref
output is typically one half of the full scale positive and negative
range of the Vout current sense output signal. With no current
flowing in the IP+/IP- pins, the voltage on the Vout output will
typically equal the voltage on the Vref output. Positive IP+/IPcurrent causes the voltage on Vout to increase relative to Vref
while negative IP+/IP- current will cause it to decrease.
GAIN
For +/-50A parts
For VVOC between 0 ×VCC and 0.5 ×VCC the I
level is 1.2×IP.
FAULTB
threshold
For +/-65A parts
For VVOC between 0 ×VCC and 0.5 ×VCC the I
level is 1.2×IP.
FAULTB
threshold
If the input current exceeds the OCD threshold value I
FAULTB
the output pin FAULTB will transition low and stay low, even if
input current drops below the threshold. In order to reset the
FAULTB output the user needs to bring VOC pin to VCC and
hold it there for at least THvoc. . Once the OCD function is reset
the VOC voltage should return back to its normal operating
voltage Vvoc. A switch SW1 on Figure 1 can be used for this.
Other methods are available as well.
If OCD function is used, an OCD reset must be applied to the
VOC pin after system power up, to put the OCD function and
FAULTB pin in a known state.
The sensor resistors are biased by an internal 4.35V reference
voltage and the voltage on the Vref output is 2.175V (typical).
This arrangement provides a fixed gain and enhanced supply
rejection. The Vout pin drives to approximately 3.9V at full
positive current and 0.3V at full negative current.
The FAULTB output is active low open drain. A pull-up resistor
POWER UP / DOWN
FAULTB low output voltage is below 200mV. The value of pullup resistor is 2-10kOhm.
An under-voltage lockout circuit monitors the voltage on the
VCC pin. If the VCC voltage is less than the under-voltage
threshold the MCA1101 is in an inactive state. Vout and Vref
both drive to ground. If the VCC voltage exceeds the under-
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Document: 6020-1102-01 Rev G
should be connected between FAULTB and VCC. The VCC
voltage will determine the high level of FAULTB signal.
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Page 11 of 14
FREQUENCY RESPONSE
The MCA1101 offers a low noise and wideband response, with
a 3dB bandwidth of > 1.5MHz, as shown in the plots below.
Vout response time is the time interval from 80% of the IP to
80% of the Vout. The response time is 300ns typical.
Gain vs. Frequency
5
RESPONSE TIME
Gain(dB)
0
1
10
100
1000
10000
-5
-10
-15
-20
Figure 5 - Vout response time
Freq(KHz)
APPLICATIONS INFORMATION
Figure 3 - Gain vs. Frequency
The MCA1101 detects current by measuring the magnetic field
generated by that current. Therefore it’s important to consider
the effect of externally generated magnetic fields, whether from
another current flowing in the system, a magnet, or electromagnetic component.
Phase vs. Frequency
10
Phase(°)
-40 1
10
100
1000
10000
-90
-140
-190
-240
Freq(KHz)
Figure 4 - Phase vs. Frequency
In order to provide immunity to external fields, MCA1101 senses
a differential field generated by the primary current, which flows
through a U-shaped conductor inside the package. Therefore,
to first order, the sensor will reject any common mode field
originating from outside of its package.
However, it’s still prudent to minimize the exposure to external
fields. The MCA1101 is most sensitive to magnetic fields in the
X-Y plane (i.e. the plane of the PCB surface), and is relatively
insensitive to fields in the Z direction (perpendicular to the PCB
surface). Thus when laying out the PCB, care should be taken
to avoid a current passing directly underneath the device itself,
because the magnetic field generated by that current will be
parallel to the PCB surface.
When laying out the PCB, the traces carrying the input and
output currents should approach the two sets of 4 input/output
pins in a symmetric manner, from a direction perpendicular to
the edge of the package (see Figure 6 below).
Figure 6 - Layout for current traces
Note:
The via break in the metal at either end of the package. The
purpose of these is to prevent the input current from
approaching the input pins from the lateral direction
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Document: 6020-1102-01 Rev G
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Page 12 of 14
DEVICE MARKING
Production information is printed on the package surface by laser marking. Markings consist of 3 lines of characters including
ACEINNA logo.
Line 1
Line 1: ACEINNA Logo
Line 2
Line 3
Line 2: Part Marking
Line 3: Date Code
PART MARKING (Line 2)
M C A 1 1 XX 5
Supply voltage, VCC: 5 – 5V
Nominal current rating: 05 - 5A,
A
20 - 20A, 50 - 50A 65 – 65A
Internal code
Internal code
Output gain version: A - Fixed Gain
Product family: MC - Magnetic current sensor
DATE CODE (Line 3)
X
YY WW LLL
Lot number
Date code: Week number
Date code: Last 2 digits of the Year
Internal code (letter A-Z or a number 0-9)
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Page 13 of 14
PACKAGE OUTLINE & RECOMMENDED LAND PATTERN INFORMATION – 16-pin SOIC
PACKAGE OUTLINE DRAWING
9¡ã
¡À
2¡ã
SYMBOL
D
ZD
16
R
E
MCXXXXXX
XXXXXXXX
H
L
DETAIL-A
1
h X 45¡ã
0,08
A A1
DETAIL-A
J
K 7¡ã
¦Á
A2
C
MIN
MAX
2.44
2.64
A1
0.10
0.30
A2
2.24
2.44
0.46
B
0.36
C
0.23
0.32
D
10.11
10.31
E
7.40
7.60
1.27 BSC
H
10.11
10.51
h
0.31
0.71
J
0.381 REF
K
9° BSC
L
R
ZD
RECOMMENDED LAND PATTERN
MILLIMETERS
A
e
e
B
SOIC-16LD
α
0.51
1.01
0.76 REF
0.66 REF
0°
8°
Unit: mm
0.6
1.27
16
2.2
11.4
Note:
Recommended land pattern reference IPC7351B;
Adjust as necessary to meet application requirements and PCB
layout tolerances.
1
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Page 14 of 14
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