CQ-2235 Datasheet PDF - Asahi Kasei Microsystems

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CQ-2235
Asahi Kasei Microsystems

Part Number CQ-2235
Description High-Speed Small Current Sensor
Page 16 Pages


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[CQ-2235]
CQ-2235
High-Speed Small Current Sensor
1. Genaral Description
CQ-2235 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. Simple AI-Shell package with the Hall
sensor, magnetic core, and primary conductor realizes the space-saving and high reliability.
2. Feartures
- Bidirectional type
- Electrical isolation between the primary conductor and the sensor signal
- 3.3V single supply operation
- Ratiometric output
- Low variation and low temperature drift of sensitivity and offset voltage
- Low noise output: 1.2mVrms (typ.)
- Fast response time: 1μs (typ.)
- Small-sized package, halogen free
- Standards: IEC/UL 60950-1, UL 508, CSA C22.2 No. 14
IEC 62109 (certification pending)
MS1569-E-01
-1-
2014/04



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[CQ-2235]
3. Table of Contents
1. Genaral Description....................................................................................................................................... 1
2. Feartures ........................................................................................................................................................ 1
3. Table of Contents .......................................................................................................................................... 2
4. Block Diagram and Functions ....................................................................................................................... 3
5. Output Characteristics ................................................................................................................................... 4
6. Pin Configurations and Functions ................................................................................................................. 4
7. Safety Standards ............................................................................................................................................ 5
8. Absolute Maximum Ratings.......................................................................................................................... 5
9. Recommended Operating Conditions............................................................................................................ 5
10. Electrical Characteristics ............................................................................................................................. 6
11. Characteristics Definitions .......................................................................................................................... 7
12. Recommended External Circuits ................................................................................................................10
13. Package.......................................................................................................................................................11
14. Reliability Tests..........................................................................................................................................14
15. Precautions .................................................................................................................................................15
IMPORTANT NOTICE ...................................................................................................................................16
MS1569-E-01
-2-
2014/04



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4. Block Diagram and Functions
P
Magnetic
Core
Amplifier
Buffer
Hall
Sensor
Compensation
Bias Unit
EEPROM Unit
[CQ-2235]
VOUT
VSS
VDD
DATA_IO SCLK
N
Figure 1. Functional block diagram of CQ-2235
Circuit Block
Hall Sensor
Amplifier
Buffer
Compensation
Bias Unit
EEPROM Unit
Magnetic Core
Table 1. Explanation of circuit block
Function
Hall element which detects magnetic flux density generated from the measured current.
Amplifier of Hall element‟s 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 offset
voltage.
Drive circuit for the Hall element.
Non-volatile memory for setting adjustment parameters. The parameters are set before the
shipment.
Magnetic core which gathers the magnetic flux density to the Hall element.
MS1569-E-01
-3-
2014/04



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5. Output Characteristics
VOUT
VDD
N
CQ-2235
(Top View)
P
IIN
1/2 VDD
[CQ-2235]
VDD
VOUT
INS N→P 0
P→N
Figure 2. Output characteristics of CQ-2235
INS IIN
6. Pin Configurations and Functions
76
CQ-2235
(Top View)
1 2 345
Figure 3. Pin assignment of CQ-2235
Table 2. Pin configuration and functions of CQ-2235
No. Pin Name I/O
Description
1 DATA_IO - Test pin (connect to ground)
2 VDD PWR Power supply pin (3.3V)
3 VSS GND Ground pin (0V)
4
VOUT
O Analog output pin
5
SCLK
- Test pin (connect to ground)
6 P I Primary current pin (+)
7 N I Primary current pin (−)
MS1569-E-01
-4-
2014/04



CQ-2235 datasheet pdf
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