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Teilenummer | CQ-330A |
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Beschreibung | High-Speed Response Coreless Current Sensor | |
Hersteller | Asahi Kasei Microsystems | |
Logo | ||
Gesamt 19 Seiten [CQ-330A]
CQ-330A
High-Speed Response Coreless Current Sensor
1. General Description
CQ-330A 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: 0.8mVrms (typ.)
- Bi-directional type
- 5V single power supply
- Ratiometric output
- Halogen free
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[CQ-330A]
9. Electrical Characteristics
Table 5. Electrical characteristics
Conditions (unless otherwise specified): Ta = 35°C, VDD = 5V
Parameter
Symbol
Conditions
Min. Typ. Max. Units
Current Consumption
Sensitivity
(Note 1, Note 2, Note 3)
IDD No loads
Vh See paragraph 10.1
8.3 11
mA
65.3 66.0 66.7 mV/A
Zero-Current Output
Voltage (Note 1, Note 2)
Linear Sensing Range
Linearity Error
(Note 1, Note 2)
Vof See paragraph 10.1
INS
ρ See paragraph 10.2
2.480
−31.8
−0.6
2.500
2.520
31.8
0.6
V
A
%F.S.
Rise Response Time
tr
CL = 100pF,
see paragraph 10.5
0.5 µsec
Fall Response Time
tf
CL = 100pF,
see paragraph 10.5
0.5 µsec
Bandwidth
Output Noise (Note 2)
Temperature Drift of
Sensitivity (Note 2)
fT
VNrms
Vh-dmax
-3dB, CL = 100pF
100Hz to 4MHz
Ta = −40 to 90°C
1000
0.8
±1.4
kHz
mVrms
%
Temperature Drift of
Zero-Current Output
Voltage (Note 2)
Vof-dmax
Ta = −40 to 90°C
IIN = 0A
±10 mV
Ratiometricity Error of
Sensitivity (Note 2)
Vh-R VDD = 4.5V to 5.5V
−1.0
1.0 %
Ratiometricity Error of
Zero-Current Output
Voltage (Note 2)
Total Accuracy (Note 5)
Primary Conductor
Resistance (Note 4)
Vof-R
ETO
R1
VDD = 4.5V to 5.5V,
IIN = 0A
Ta = −40 to 90°C
−0.5
±1.3
1.6
0.5 mVrms
%F.S.
mΩ
Isolation Voltage(Note 6)
Isolation Resistance
(Note 4)
VINS AC 50/60Hz, 60sec
RINS DC 1kV
3.0
500
kV
MΩ
Clearance Distance
(Note 4)
dCL
between primary and
secondary conductors
5.0 5.2
mm
Creepage Distance
(Note 4)
dCP
between primary and
secondary conductors
5.0 5.2
mm
Note 1. These parameters can drift by long-term use or reflow process. Please see ‘14. Reliability Tests’ for the
reference of drift values.
Note 2. The primary current (IIN) is swept within ±10A. Current is applied within 35msec in each step.
Note 3. This parameter is tested on condition that current density is uniform. Sensitivity may change slightly
depending on a primary conductor layout on PCB. Please see the application note provided in the
AKM website.
Note 4. These parameters are guaranteed by design.
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6 Page [CQ-330A]
CQ-330A
Figure 8. Recommended external circuits of CQ-330A
(a) 0.1F bypass capacitor should be placed near by the CQ-330A.
(b) CQ-330A has the ratiometric output. By making the supply voltage of CQ-330A and the reference voltage
of A/D converter common, the A/D conversion error caused by the fluctuation of supply voltage is
decreased. Voltage dividers (R1 and R2) are required if the reference voltage of A/D converter is less than
+5V.
For example, if the reference voltage of A/D converter is +3.3V which is its supply voltage level,
R1=20kΩ, R2=39kΩ are recommended. If the reference voltage of A/D converter is different from its
supply voltage level, one more voltage divider is required.
(c) Add a low-pass filter if it is necessary.
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12 Page | ||
Seiten | Gesamt 19 Seiten | |
PDF Download | [ CQ-330A Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
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CQ-3303 | High-Speed Response Coreless Current Sensor | Asahi Kasei Microsystems |
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