Common mode input voltage: 4.5V ~ 5.5V Gain (amplification): - Number of channels: 1 Op amp type: Current Sense Monitoring type: High Side Operating bandwidth: 1000kHz Operating voltage: 4.5V ~ 5.5V
Common mode input voltage: 4.5V ~ 5.5V Gain (amplification): - Number of channels: 1 Op amp type: Current Sense Monitoring type: High Side Operating bandwidth: 1000kHz Operating voltage: 4.5V ~ 5.5V
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
014003795-E-02W
-1-
2015/07
[CQ-3301]
3. Table of Contents
1. General Description ........................................................................................................................................................ 1
IMPORTANT NOTICE ................................................................................................................................................... 19
014003795-E-02W
-2-
2015/07
[CQ-3301]
4. Block Diagram and Functions
P
Amplifier
Buffer
VOUT
Primary Conductor
Hall
Sensor
Compensation
VSS
Bias Unit
EEPROM Unit
VDD
N
TAB1
TAB2
TEST1
TEST2
TEST3
Figure 1. Functional block diagram of CQ-3301
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 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.
Circuit Block
Primary
Conductor
Hall Sensor
Amplifier
Buffer
Compensation
Bias Unit
EEPROM Unit
014003795-E-02W
-3-
2015/07
[CQ-3301]
5. Pin Configurations and Functions
VOUT
Measured Current
I
IN
P
10
N
9
V
DD
CQ-3301
(Top View)
1/2 V
DD
1
8
VDD
VOUT
−I
NS
N to P
0
P to N
I
NS
I
IN
Figure 2. Pin assignment and typical output characteristics of CQ-3301
Table 2. Pin configuration and functions of CQ-3301
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