High-Speed Small Current Sensor
[CQ-209B]
CQ-209B
High-Speed Small Current Sensor
Features
CQ-209B is an open-type current sensor using a Hall sensor w...
Description
[CQ-209B]
CQ-209B
High-Speed Small Current Sensor
Features
CQ-209B 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.
Features
- Unidirectional type - Electrical isolation between the primary conductor and the sensor signal - 5V single supply operation - Ratiometric output - Low variation and low temperature drift of sensitivity and offset voltage - Low noise output: 2.1mVrms (max.) - Fast response time: 1μs (typ.) - Small-sized surface mount package, halogen free
Functional Block Diagram
N
Magnetic Core
Amplifier
Buffer
VOUT
Hall Sensor
Compensation
VSS
Bias Unit
EEPROM Unit
VDD
P DATA_IO SCLK
Figure 1. Functional block diagram of CQ-209B
MS1290-E-06
-1-
2013/09
[CQ-209B]
Circuit Blocks
Circuit Block Hall Sensor
Amplifier
Buffer
Compensation Bias Unit
EEPROM Unit
Magnetic Core
Table 1. Explanation of circuit blocks
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 dr...
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