MCx1101 Evaluation Note, Document No.: 7430-9001-01 Ver1.6 Page 1 of 5
Evaluation Note for MCA1101/MCR1101
±5A ±20A ±50A, 5V/3.3V Isolated Current Sensors
EVB EB0013 Rev A
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One Technology Drive, Suite 325, Andover, MA 01810, USA
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Information furnished herein by ACEINNA is believed to be accurate and reliable. However, ACEINNA assumes
no responsibility for its use, or for any infringements of patents or other rights of third parties resulting from its use.
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the right to change this document without notification.
MCx1101 Evaluation Note, Document No.: 7430-9001-01 Ver1.6 Page 2 of 5
DESCRIPTION
The EB0013 evaluation board provides a simple way to evaluate MCx1101 family of current sensor ICs. This
double side PCB with 4-ounce copper produces the low resistance path to the galvanically isolated primary
current. An 8-pin connector P1 and test points enable users to easily access the signals of the secondary side
bias and outputs. Two BNC outputs (VREF and VOUT) are intended to provide the low noise channels for VREF
and VOUT signals to the oscilloscope or other test equipment.
FEATURES
• High Accuracy Current Sensor
• Superior Frequency Response (1.5 MHz 3dB BW)
• Fast output response time (300ns typical)
• Low Primary Resistance (0.9mΩ/50A and 1.3mΩ/5A/ 20A typical)
• 5V or 3.3V Single Supply Operation Options
• Low power consumption (6.5mA/5V and 4.5mA/3.3V typical)
• Overcurrent fault detection
• SOIC-16 package (RoHS/REACH compliant)
• -40°C 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
ORDER INFORMATION
EVB PART NUMBER
Current Range
Gain
Voltage
EVB MCA1101-5-5
±5 Amp
Fixed
5V
EVB MCA1101-20-5
±20 Amp
Fixed
5V
EVB MCA1101-50-5
±50 Amp
Note1
Fixed
5V
EVB MCR1101-5-5
±5 Amp
Ratiometric
5V
EVB MCR1101-20-5
±20 Amp
Ratiometric
5V
EVB MCR1101-50-5
±50 Amp
Note1
Ratiometric
5V
EVB MCA1101-5-3
±5 Amp
Fixed
3.3V
EVB MCA1101-20-3
±20 Amp
Fixed
3.3V
EVB MCA1101-50-3
±50 Amp
Note1
Fixed
3.3V
EVB MCR1101-5-3
±5 Amp
Ratiometric
3.3V
EVB MCR1101-20-3
±20 Amp
Ratiometric
3.3V
EVB MCR1101-50-3
±50 Amp
Note1
Ratiometric
3.3V
Note1: ±50A Pulse: Use pulse current for test above 35A RMS on EVB EB0013 (see operating instructions)
MCx1101 Evaluation Note, Document No.: 7430-9001-01 Ver1.6 Page 3 of 5
TEST BOARD PIN DESCRIPTION
Name
Connection
Description
I_IN
Fix the wire of Primary Current by screw
Non-Inverting Current Sense Input
I_OUT
Fix the wire of Primary Current by screw
Inverting Current Sense Input
VOC
P1 Connector Pin 1
Input pin. Voltage on this pin defines the OCP
threshold level.
VCC
P1 Connector Pin 2
Sensor power supply.
VOUT
P1 Connector Pin 3
Analog Output Signal linearly proportional to
Primary Path Current
VREF
P1 Connector Pin 4
Zero Current Analog Reference Output
GND
P1 Connector Pin 5
Ground.
TEST1
P1 Connector Pin 6
For factory calibration only. Do not connect.
TEST2
P1 Connector Pin 7
For factory calibration only. Do not connect.
FAULTB
P1 Connector Pin 8
Output pin, active low when the primary current
exceeds the setting threshold
OPERATING INSTRUCTIONS
• Connect power supply to positive terminal and negative terminal to VCC and GND of P1, respectively
• Connect multimeter, oscilloscope, or other signal measurement devices to VOUT, VREF and GND through either
P1 connector, test points, or BNC connectors
• Connect current to be measured to the I_IN and I_OUT Primary Wires. For correct positive/negative current
readings, positive current should flow from I_IN to I_OUT.
• To read sensor output, VOUT, VREF, and VCC voltages must be measured and converted to a current per the
electrical characteristics table.
Note:
• This EVB is designed to work up to 50A peak (35A RMS) for thermal reasons. In order to evaluate the
performance with 35A to 50A DC, use pulsed current with appropriate duty cycle that guarantees no more than
35A RMS.
• High current will cause sensor IC and PCB to be very hot. The junction temperature can exceed 100℃. Do not
touch the chip and PCB. The temperature rise can be reduced by using thicker cable and bigger screws.
SCHEMATIC
MCx1101 Evaluation Note, Document No.: 7430-9001-01 Ver1.6 Page 4 of 5
PCB LAYOUT – TOP SIDE
EB0013 REV A PHOTO
MCx1101 Evaluation Note, Document No.: 7430-9001-01 Ver1.6 Page 5 of 5
BILL OF MATERIALS
Reference Design
Item
Value
Package
Rating
Description
R1, R2
4.7KΩ
0603
1/10W
Pull up resistor
R3
100Ω
0603
1/10W
Input limit resistor
R4
10KΩ
0603
1/10W
Pull up resistor
C1
10nF
X7R Ceramic/0603
10V
Reference PIN coupling capacitor
(NP for MCA1101)
C2
0.1uF
X7R Ceramic/0603
10V
VCC coupling capacitor
C3
22uF
X7R Ceramic/1210
16V
VCC coupling capacitor
U1
MCx1101
SOIC16
AMR Current Sensor
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