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PDF CQ-2065 Data sheet ( Hoja de datos )
| Número de pieza | CQ-2065 | |
| Descripción | High-Speed Small-Sized Current Sensor | |
| Fabricantes | Asahi Kasei Microsystems | |
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[CQ-2065]
CQ-2065
High-Speed Small-Sized Current Sensor
Overview
CQ-2065 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
- Bidirectional 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 package, halogen free
Functional Block Diagram
P
Magnetic
Core
Amplifier
Buffer
VOUT
Hall
Sensor
Compensation
VSS
Bias Unit
EEPROM Unit
VDD
N DATA_IO SCLK
Figure 1. Functional block diagram of CQ-2065
MS1264-E-05
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1 page  
[CQ-2065]
Characteristics Definitions
(1) Sensitivity Vh [mV/A], offset voltage Vof [V]
Sensitivity is defined as the slope of the approximate straight line calculated by the least square method,
using the data of VOUT voltage (VOUT) when the primary current (IIN) is swept within the range of linear
sensing range (INS). Offset voltage is defined as the intercept of the approximate straight line above.
(2) Linearity error ρ [%F.S.]
Linearity error is defined as the ratio of the maximum error voltage (Vd) to the full scale (F.S.), where Vd is
the maximum difference between the VOUT voltage (VOUT) and the approximate straight line calculated in
the sensitivity and offset voltage definition. Definition formula is shown in below:
ρ = Vd / F.S. × 100
NOTE) Full scale (F.S.) is defined by the multiplication of the linear sensing range and sensitivity (See
Figure 5).
VOUT(V)
Approximate straight line
by least square method
Vd F.S.
=2Vh×|INS|
−|INS|
0
|INS| IIN(A)
Figure 5. Output characteristics of CQ-2065
(3) Ratiometric error of sensitivity Vh-R [%] and ratiometric error of offset voltage Vof-R [%]
Output of CQ-2065 is ratiometric, which means the values of sensitivity (Vh) and offset voltage (Vof) are
proportional to the supply voltage (VDD). Ratiometric error is defined as the difference between the Vh (or
Vof) and ideal Vh (or Vof) when the VDD is changed from 5.0V to VDD1 (4.5V<VDD1<5.5V). Definition formula is
shown in below:
Vh-R = 100 × {(Vh(VDD = VDD1) / Vh(VDD = 5V)) − (VDD1 / 5)} / (VDD1 / 5)
Vof-R = 100 × {(Vof(VDD = VDD1) / Vof(VDD = 5V)) − (VDD1 / 5)} / (VDD1 / 5)
(4) Temperature drift of sensitivity Vh-d [%]
Temperature drift of sensitivity is defined as the drift ratio of the sensitivity (Vh) at Ta=Ta1 (−40C<Ta1<90C)
to the Vh at Ta=35C, and calculated from the formula below:
Vh-d = 100 × (Vh(Ta1) / Vh(35C) − 1)
Maximum temperature drift of sensitivity (Vh-dmax) is defined as the maximum value of |Vh-d| through the
defined temperature range.
Reference data of the temperature drift of sensitivity of CQ-2065 is shown in Figure 6.
MS1264-E-05
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2013/06
5 Page 
[CQ-2065]
Reliability Tests
Table 7. Test parameters and conditions of reliability test
No. Test Parameter
Test Conditions
n Test Time
1
High Humidity Storage Test
【JEITA EIAJ ED-4701 102】
Ta=85C, 85%RH, continuous operation
2
High Temperature Bias Test
【JEITA EIAJ ED-4701 101】
Ta=125C, continuous operation
3
High Temperature Storage Test
【JEITA EIAJ ED-4701 201】
Ta=150C
4
Low Temperature Storage Test
【JEITA EIAJ ED-4701 202】
Ta= −55C
【JEITA EIAJ ED-4701 105】
5 Heat Cycle Test
−40C ↔ 25C ↔125C
30min. ↔ 5min. ↔30min.
Tested in vapor phase
【JEITA EIAJ ED-4701 403】
6 Vibration Test
Vibration frequency: 10~55Hz (1min.)
Vibration amplitude: 1.5mm (x, y, z directions)
22 1000h
22 1000h
22 1000h
22 1000h
22 100 cycles
5 2h for each direction
Tested samples are pretreated as below before each reliability test:
Desiccation: 125C /24h → Moisture Absorption: 85C/85%RH/168h → Flow: 1 time (260C, 10s)
Criteria:
Products whose drifts before and after the reliability tests do not exceed the values below are considered to be in
spec.
Sensitivity Vh (Ta=25C)
： Within ±1.5%
Offset Voltage Vof (Ta=25C)
： Within ±100mV
Linearity ρ (Ta=25C)
： Within ±1%
MS1264-E-05
- 11 -
2013/06
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet CQ-2065.PDF ] | |
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