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[CQ-3301]
CQ-3301
High-Speed Response Coreless Current Sensor
1. General Description
CQ-3301 is an open-type current sensor using a Hall sensor which outputs the analog voltage proportional
to the AC/DC current. Quantum well ultra- thin film InAs (Indium Arsenide) is used as the Hall sensor, which
enables the high-accuracy and high-speed current sensing. Coreless surface mount package realizes the space-
saving.
2. Features
- Small-sized surface mount package: VSOP-24
- High isolation voltage: 3.0kV (50/60Hz, 60sec)
- Compliant to safety standards of IEC/UL-60950 and UL-508
- Ultra-fast response time: 0.5μsec (typ.)
- Low variation and low temperature drift of sensitivity and zero-current output voltage
- No output hysteresis
- Low noise output: 1.6mVrms (typ.)
- Bi-directional type
- 5V single power supply
- Ratiometric output
- Halogen free
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[CQ-3301]
3. Table of Contents
1. General Description........................................................................................................................................1
2. Features ..........................................................................................................................................................1
3. Table of Contents ...........................................................................................................................................2
4. Block Diagram and Functions ........................................................................................................................3
5. Pin Configurations and Functions ..................................................................................................................4
6. Safety Standards .............................................................................................................................................5
7. Absolute Maximum Ratings...........................................................................................................................5
8. Recommended Operating Conditions ............................................................................................................5
9. Electrical Characteristics................................................................................................................................6
10. Characteristics Definitions ...........................................................................................................................8
11. Recommended External Circuits................................................................................................................11
12. Package.......................................................................................................................................................13
13. Board Layout Sample .................................................................................................................................16
14. Reliability Tests .........................................................................................................................................17
15. Precautions .................................................................................................................................................18
IMPORTANT NOTICE ...................................................................................................................................19
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4. Block Diagram and Functions
P
[CQ-3301]
Hall
Sensor
Bias Unit
Amplifier
Buffer
Compensation
EEPROM Unit
VOUT
VSS
VDD
TEST1 TEST2 TEST3
N
Figure 1. Functional block diagram of CQ-3301
Circuit Block
Primary
Conductor
Hall Sensor
Amplifier
Buffer
Compensation
Bias Unit
EEPROM Unit
Table 1. Explanation of circuit blocks
Function
Conductor which measured current is applied.
Hall element which detects magnetic flux density generated from the measured current.
Amplifier of Hall elements output.
Output buffer with gain. This block outputs the voltage (VOUT) proportional to the current
applied to the primary conductor.
Compensation circuit which adjusts the temperature drifts of sensitivity and zero-current
output voltage.
Drive circuit for Hall element.
Non-volatile memory for setting adjustment parameters. The parameters are adjusted
before the shipment.
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5. Pin Configurations and Functions
Measured Current IIN
P
10
N
9
VOUT
VDD
[CQ-3301]
1
VDD
CQ-3301
(Top View)
1/2 VDD
8
VOUT
INS N to P 0
P to N
INS IIN
Figure 2. Pin assignment and typical output characteristics of CQ-3301
Table 2. Pin configuration and functions of CQ-3301
No. Pin Name I/O
Function
1 TAB1 - Radiation pin, recommended to connect to GND
2
TEST1
- Test pin, recommended to connect to GND
3 VDD PWR Power supply pin, 5.0V
4
TEST2
- Test pin, recommended to connect to VDD
5 VSS GND Ground pin (GND)
6
VOUT
O Analog output pin
7
TEST3
- Test pin, recommended to connect to GND
8 TAB2 - Radiation pin, recommended to connect to GND
9 N I Primary conductor pin
10 P I Primary conductor pin
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[CQ-3301]
6. Safety Standards
- IEC/UL 60950-1 Information Technology Equipment Edition 2. (File No.E359197)
- CSA C22.2 NO. 60950-1-07 Information Technology Equipment Edition 2. (File No. E359197)
- UL 508 Industrial Control Equipment Edition 17. (File No. E353882)
7. Absolute Maximum Ratings
Table 3. Absolute maximum ratings
Parameter
Symbol
Min.
Max. Units
Notes
Supply Voltage
Analog Output Current
Storage Temperature
VDD 0.3 6.5 V VDD pin
IOUT
1
1 mA VOUT pin
Tstg 40 125 °C
WARNING: Operation at or beyond these limits may result in permanent damage to the device. Normal
operation is not guaranteed at these extremes.
8. Recommended Operating Conditions
Table 4. Recommended operating conditions
Parameter
Symbol Min. Typ. Max. Units
Notes
Supply Voltage
Analog Output Current
VDD 4.5 5.0 5.5 V
IOUT 0.5
0.5 mA VOUT pin
Output Load Capacitance
CL
100 pF VOUT pin
Maximum Primary Current
(RMS)
IRMSmax
20
DC value or RMS value which can
20 A be applied to primary conductor
see Figure 3
Operating Ambient
Temperature
Ta 40
90 °C see Figure 3
WARNING: Electrical characteristics are not guaranteed when operated at or beyond these conditions.
(80°C, 20A)
(90°C, 10A)
Conditions: Mounted on the test board shown in Figure 12. VDD = 5V
Figure 3. Primary current derating curve of CQ-3301
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