CQ-3303 Datasheet, PDF (3/19 Pages) Asahi Kasei Microsystems – High-Speed Response Coreless Current Sensor

4. Block Diagram and Functions
P
[CQ-3303]
Hall
Sensor
Bias Unit
Amplifier
Buffer
Compensation
EEPROM Unit
VOUT
VSS
VDD
TEST1 TEST2 TEST3
N
Figure 1. Functional block diagram of CQ-3303
Circuit Block
Primary
Conductor
Hall Sensor
Amplifier
Buffer
Compensation
Bias Unit
EEPROM Unit
Table 1. Explanation of circuit blocks
Function
Conductor which the measured current is applied.
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 (V_OUT) 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.
014003802-E-01
-3-
2014/11