[CQ-3303]

014003802-E-01

2014/11

- 3 -

4. Block Diagram and Functions

Figure 1. Functional block diagram of CQ-3303

Table 1. Explanation of circuit blocks

Circuit Block

Function

Primary

Conductor

Conductor which the measured current is applied.

Hall Sensor

Hall element which detects magnetic flux density generated from the measured current.

Amplifier

Amplifier of Hall element’s output.

Buffer

applied to the primary conductor.

Compensation

Compensation circuit which adjusts the temperature drifts of sensitivity and zero-current

output voltage.

Bias Unit

Drive circuit for Hall element.

EEPROM Unit

Non-volatile memory for setting adjustment parameters. The parameters are adjusted

before the shipment.

N

Hall

Sensor

Amplifier

Buffer

Compensation

Bias Unit

EEPROM Unit

VOUT

TEST3

TEST1

VDD

VSS

P

TEST2