[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 spacesaving. 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 014003800-E-02W 2015/07 -1- [CQ-330A] 3. Table of Contents 1. General Description ........................................................................................................................................................ 1 2. Features........................................................................................................................................................................... 1 3. Table of Contents ........................................................................................................................................................... 2 4. Block Diagram and Functions ........................................................................................................................................ 3 5. Pin Configurations and Functions .................................................................................................................................. 4 6. Safety Standards ............................................................................................................................................................. 5 7. Absolute Maximum Ratings ........................................................................................................................................... 5 8. Recommended Operating Conditions ............................................................................................................................. 5 9. Electrical Characteristics ................................................................................................................................................ 6 10. Characteristics Definitions............................................................................................................................................ 8 11. Recommended External Circuits ................................................................................................................................ 11 12. Package ....................................................................................................................................................................... 13 13. Board Layout Sample ................................................................................................................................................. 16 14. Reliability Tests .......................................................................................................................................................... 17 15. Precautions ................................................................................................................................................................. 18 IMPORTANT NOTICE ................................................................................................................................................... 19 014003800-E-02W 2015/07 -2- [CQ-330A] 4. Block Diagram and Functions P Primary Conductor Amplifier Buffer VOUT Hall Sensor VSS Compensation Bias Unit N VDD EEPROM Unit TAB1 TAB2 TEST1 TEST2 TEST3 Figure 1. Functional block diagram of CQ-330A Circuit Block Primary Conductor Hall Sensor Amplifier Buffer Compensation Bias Unit EEPROM Unit 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 (VOUT) 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. 014003800-E-02W 2015/07 -3- [CQ-330A] 5. Pin Configurations and Functions VOUT Measured Current IIN VDD N P 9 10 CQ-330A 1/2 VDD (Top View) 8 1 VDD VOUT −INS N to P 0 P to N INS IIN Figure 2. Pin assignment and typical output characteristics of CQ-330A No. 1 2 3 4 5 6 7 8 9 10 Pin Name TAB1 TEST1 VDD TEST2 VSS VOUT TEST3 TAB2 N P Table 2. Pin configuration and functions of CQ-330A I/O Function Radiation pin, recommended to connect to GND Test pin, recommended to connect to GND PWR Power supply pin, 5.0V Test pin, recommended to connect to VDD GND Ground pin (GND) O Analog output pin Test pin, recommended to connect to GND Radiation pin, recommended to connect to GND I Primary conductor pin I Primary conductor pin 014003800-E-02W 2015/07 -4- [CQ-330A] 6. Safety Standards - IEC/UL 60950-1 – Information Technology Equipment – Edition 2. (File No.E359197) - CSA C22.2 NO. 60950-1-07 – Information Technology Equipment – Edition 2. (File No. E359197) - UL 508 – Industrial Control Equipment – Edition 17. (File No. E353882) 7. Absolute Maximum Ratings Table 3. Absolute maximum ratings Parameter Symbol Min. Max. Units Notes Supply Voltage VDD −0.3 6.5 V VDD pin Analog Output Current IOUT −1 1 mA VOUT pin Storage Temperature Tstg −40 125 °C WARNING: Operation at or beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes. 8. Recommended Operating Conditions Parameter Supply Voltage Analog Output Current Output Load Capacitance Maximum Primary Current (RMS) Table 4. Recommended operating conditions Symbol Min. Typ. Max. Units Notes VDD 4.5 5.0 5.5 V IOUT −0.5 0.5 mA VOUT pin CL 100 pF VOUT pin DC value or RMS value which can IRMSmax −20 20 A be applied to primary conductor see Figure 3 Operating Ambient Ta −40 90 °C see Figure 3 Temperature WARNING: Electrical characteristics are not guaranteed when operated at or beyond these conditions. (80°C, 20A) (90°C, 10A) Conditions: Mounted on the test board shown in Figure 12. VDD = 5V Figure 3. Primary current derating curve of CQ-330A Cooling or thermal radiation will improve the derating curve above. 014003800-E-02W 2015/07 -5- [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 IDD No loads 8.3 11 mA Sensitivity Vh See paragraph 10.1 65.3 66.0 66.7 mV/A (Note 1, Note 2, Note 3) Zero-Current Output Vof See paragraph 10.1 2.480 2.500 2.520 V Voltage (Note 1, Note 2) Linear Sensing Range INS −31.8 31.8 A Linearity Error ρ See paragraph 10.2 −0.6 0.6 %F.S. (Note 1, Note 2) CL = 100pF, Rise Response Time tr 0.5 µsec see paragraph 10.5 CL = 100pF, Fall Response Time tf 0.5 µsec see paragraph 10.5 Bandwidth fT -3dB, CL = 100pF 1000 kHz Output Noise (Note 2) VNrms 100Hz to 4MHz 0.8 mVrms Temperature Drift of Vh-dmax Ta = −40 to 90°C ±1.4 % Sensitivity (Note 2) Temperature Drift of Ta = −40 to 90°C Zero-Current Output Vof-dmax ±10 mV IIN = 0A Voltage (Note 2) Ratiometricity Error of Vh-R VDD = 4.5V to 5.5V −1.0 1.0 % Sensitivity (Note 2) Ratiometricity Error of VDD = 4.5V to 5.5V, %F.S. Zero-Current Output Vof-R −0.5 0.5 IIN = 0A Voltage (Note 2) Ta = −40 to 90°C ±1.3 Total Accuracy (Note 5) ETO %F.S. Ta = 35°C ±0.5 Primary Conductor R1 1.6 mΩ Resistance (Note 4) Isolation Voltage(Note 6) VINS AC 50/60Hz, 60sec 3.0 kV Isolation Resistance RINS DC 1kV 500 MΩ (Note 4) Clearance Distance between primary and dCL 5.0 5.2 mm (Note 4) secondary conductors Creepage Distance between primary and dCP 5.0 5.2 mm (Note 4) secondary conductors 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. 014003800-E-02W 2015/07 -6- [CQ-330A] Note 5. Total accuracy ETO is calculated by the equation below. ETO = |100 × (Vh_meas − 66) / (66 × 2)| + |100 × (Vof_meas − Vof_meas_35) / (66 × 31.8 × 2 / 1000)| + |ρmeas| where Vh_meas[mV/A], Vof_meas[V], ρmeas[%F.S.] represent the measured value of sensitivity, zero-current output voltage and linearity error respectively, Vh[mV/A] represent the typical value of sensitivity, and Vof_meas_35[V] represent the measured value of zero-current output voltage at Ta = 35°C. Note 6. This parameter is tested in mass-production line for all devices. 014003800-E-02W 2015/07 -7- [CQ-330A] 10. Characteristics Definitions 10.1. Sensitivity Vh [mV/A], Zero-Current Output 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 pin voltage (VOUT) when the primary current (IIN) is swept within ±10A. Zero-current output voltage is defined as the intercept of the approximate straight line above. 10.2. Linearity Error ρ [%F.S.] Linearity error is defined as the ration of the maximum error voltage (Vd) to the full scale (F.S.), where Vd is the maximum difference between the VOUT pin voltage (VOUT) and the approximate straight line calculated in the sensitivity and zero-current output voltage definition. Definition formula is shown in below: ρ = Vd / F.S. × 100 Full scale (F.S.) is defined by the multiplication of the linear sensing range and sensitivity (Figure 4). Approximate straight line by least square method VOUT(V) F.S. =2Vh×|INS| Actual output voltage (Peak time: 35msec) Vd −|INS| 0 |INS| IIN(A) Figure 4. Output characteristics of CQ-330A 10.3. Ratiometric Error of Sensitivity Vh-R [%] and Ratiometric Error of Zero-Current Output Voltage Vof-R [%F.S.] Output of CQ-330A is ratiometric, which means the values of sensitivity (Vh) and zero-current output 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 = 5.0V)) – (VDD1 / 5.0)} / (VDD1 / 5.0) Vof-R = 100 × (Vof(VDD = VDD1) – Vof(VDD = 5.0V) × VDD1 / 5.0) / F.S. Full scale (F.S.) is defined by the multiplication of the linear sensing range and sensitivity at the condition of VDD = 5.0V (Figure 4). 014003800-E-02W 2015/07 -8- [CQ-330A] 10.4. Temperature Drift of Sensitivity Vh-d [%] , Temperature Drift of Zero-current output Voltage Vof-d [mV] Temperature drift of sensitivity is defined as the drift ratio of the sensitivity (Vh) at Ta = Ta1 (–40°C ≤ Ta1 ≤ 90°C) to the Vh at Ta = 35°C, and calculated from the formula below: Vh-d = 100 × (Vh(Ta = Ta1) / Vh(Ta = 35°C) – 1) Maximum temperature drift of sensitivity (Vh-dmax) is defined as the maximum value of |Vh-d| through the defined temperature range. Temperature drift of zero-current output voltage is defined as the drift value between the zero-current output voltage (Vof) at Ta = Ta1 (–40°C ≤ Ta1 ≤ 90°C) and the Vof at Ta = 35°C, and calculated from the formula below: Vof-d = Vof(Ta = Ta1) – Vof(Ta = 35°C) Maximum temperature drift of zero-current output voltage (Vof-dmax) is defined as the maximum value of |Vof-d| through the defined temperature range. Reference data of the temperature drift of sensitivity and zero-current output voltage are shown in Figure 5. Figure 5. Temperature Drift of Sensitivity and Zero-current output Voltage. 014003800-E-02W 2015/07 -9- [CQ-330A] 10.5. Rise Response Time tr [µsec] and Fall Response Time tf [µsec] Rise response time (or fall response time) is defined as the time delay from the 90% (or 10%) of input primary current (IIN) to the 90% (or 10%) of the VOUT pin voltage (VOUT) under the pulse input of primary current (Figure 6). IIN IIN 90% IIN 10% IIN Time Time VOUT VOUT 90% VOUT 10% VOUT tf tr Time Time Rise response time (tr) Fall response time (tf) Figure 6. Definition of response time 014003800-E-02W 2015/07 - 10 - [CQ-330A] 11. Recommended External Circuits P N Printed wiring pattern for primary conductor Printed wiring pattern for primary conductor 9 10 CQ-330A (Top View) 1 8 Printed wiring pattern for radiation VDD Printed wiring pattern for radiation 0.1uF VOUT Low-Pass Filter (Optional) Figure 7. Recommended external circuits Radiation pattern should be designed as wide as possible, so that the clearance and creepage distances satisfy the requirement. 014003800-E-02W 2015/07 - 11 - [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. 014003800-E-02W 2015/07 - 12 - [CQ-330A] 12. Package 12.1. Outline Dimensions Unit: mm The tolerances of dimensions without any mention are ±0.1mm. Terminals: Cu Plating for Terminals: Sn-100% (10µm) RoHS compliant, halogen-free Figure 9. Outline dimensions of CQ-330A 014003800-E-02W 2015/07 - 13 - [CQ-330A] 12.2. Recommended Pad Dimensions C W1 E L W1 L P W2 L E W1 W2 W3 C P W3 W2 1.42 7.62 3.60 1.65 0.35 0.30 0.65 Unit: mm Figure 10. Pad dimensions of CQ-330A If two or more trace layers are used as the current paths, please make enough number of through-holes to flow current between the trace layers. 014003800-E-02W 2015/07 - 14 - [CQ-330A] 12.3. Marking Production information is printed on the package surface by laser marking. Markings consist of 10 characters excluding AKM logo. AKM CQ 3 3 0 Y WW L A Product Code (CQ-330A) Production Date (Y/WW/L) Figure 11. Markings of CQ-330A Table 6. Production date code table Last Number of Year Week Date Production Times Character Number Character Week Character Times 0 0 01 1 1 1 1 1 02 2 2 2 2 2 03 3 3 3 3 3 04 4 4 4 4 4 5 5 5 5 6 6 6 6 7 7 7 7 8 8 8 8 51 51 9 9 9 9 52 52 0 10 53 53 A 11 54 54 B 12 C 13 D 14 E 15 : : : : 014003800-E-02W F 16 G 17 H 18 J 19 K 20 L 21 M 22 N 23 P 24 R 25 S 26 T 27 U 28 V 29 W 30 X 31 Y 32 Z 33 2015/07 - 15 - [CQ-330A] 13. Board Layout Sample (a) Top pattern (b) Bottom pattern Board size: 35.5mm × 42.0mm Board thickness: 1.6mm Copper layer thickness: 70µm For more information about board layout, please see the application note provided in the AKM website. Figure 12. Board layout sample of CQ-330A 014003800-E-02W 2015/07 - 16 - [CQ-330A] 14. Reliability Tests No. Table 7. Test parameters and conditions of reliability tests Test Parameter Test Conditions 1 High Humidity Bias Test 2 High Temperature Bias Test 3 High Temperature Storage Test 4 Low Temperature Storage Test 5 Heat Cycle Test n Test Time [JEITA EIAJ ED-4701 102] Ta = 85C, 85%RH, continuous operation 22 1000h [JEITA EIAJ ED-4701 101] Ta = 125C, continuous operation 22 1000h [JEITA EIAJ ED-4701 201] Ta = 150C 22 1000h 22 1000h 22 100 cycles [JEITA EIAJ ED-4701 202] Ta = −55C [JEITA EIAJ ED-4701 105] −65C ↔150C 30min. ↔ 30min. Tested in vapor phase Tested samples are pretreated as below before each reliability test: Desiccation: 125C/24h → Moisture Absorption: 60C/60%RH/120h → Reflow: 3 times (JEDEC Level2a) 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=35C) : Within ±1.5% Zero-current output Voltage Vof (Ta=35C) : Within ±100mV Linearity ρ (Ta=35C) : Within ±1%F.S. EEPROM data : Unchanged 014003800-E-02W 2015/07 - 17 - [CQ-330A] 15. Precautions <Storage Environment> Products should be stored at an appropriate temperature, and at as low humidity as possible by using desiccator(5 to 35C). It is recommended to use the products within 4 weeks since it has opened. Keep products away from chlorine and corrosive gas. <Long-term Storage> Long-term storage may result in poor lead solderability and degraded electrical performance even under proper conditions. For those parts, which stored long-term shall be check solderability before it is used. For storage longer than 1 year, it is recommended to store in nitrogen atmosphere. Oxygen of atmosphere oxidizes leads of products and lead solderability get worse. <Other Precautions> 1) This product should not be used under the environment with corrosive gas including chlorine or sulfur. 2) This product is lead (Pb) free. All leads are plated with 100% tin. Do not store this product alone in high temperature and high humidity environment. Moreover, this product should be mounted on substrate within six months after delivery. 3) This product is damaged when it is used on the following conditions: - Supply voltage is applied in the opposite way. - Overvoltage which is larger than the value indicated in the specification. 4) This product will be damaged if it is used for a long time with the current (effective current) which exceeds the current rating. Careful attention must be paid so that maximum effective current is smaller than current rating. 5) The characteristic can change by the influences of nearby current and magnetic field. Please make sure of the mounting position. As this product contains gallium arsenide, observe the following procedures for safety. 1) Do not alter the form of this product into a gas, powder, liquid, through burning, crushing, or chemical processing. 2) Observe laws and company regulations when discarding this product. 014003800-E-02W 2015/07 - 18 - [CQ-330A] IMPORTANT NOTICE 0. Asahi Kasei Microdevices Corporation (“AKM”) reserves the right to make changes to the information contained in this document without notice. When you consider any use or application of AKM product stipulated in this document (“Product”), please make inquiries the sales office of AKM or authorized distributors as to current status of the Products. 1. All information included in this document are provided only to illustrate the operation and application examples of AKM Products. AKM neither makes warranties or representations with respect to the accuracy or completeness of the information contained in this document nor grants any license to any intellectual property rights or any other rights of AKM or any third party with respect to the information in this document. You are fully responsible for use of such information contained in this document in your product design or applications. AKM ASSUMES NO LIABILITY FOR ANY LOSSES INCURRED BY YOU OR THIRD PARTIES ARISING FROM THE USE OF SUCH INFORMATION IN YOUR PRODUCT DESIGN OR APPLICATIONS. 2. The Product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of quality and/or reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage or serious public impact, including but not limited to, equipment used in nuclear facilities, equipment used in the aerospace industry, medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic signaling equipment, equipment used to control combustions or explosions, safety devices, elevators and escalators, devices related to electric power, and equipment used in finance-related fields. Do not use Product for the above use unless specifically agreed by AKM in writing. 3. Though AKM works continually to improve the Product’s quality and reliability, you are responsible for complying with safety standards and for providing adequate designs and safeguards for your hardware, software and systems which minimize risk and avoid situations in which a malfunction or failure of the Product could cause loss of human life, bodily injury or damage to property, including data loss or corruption. 4. Do not use or otherwise make available the Product or related technology or any information contained in this document for any military purposes, including without limitation, for the design, development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile technology products (mass destruction weapons). When exporting the Products or related technology or any information contained in this document, you should comply with the applicable export control laws and regulations and follow the procedures required by such laws and regulations. The Products and related technology may not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any applicable domestic or foreign laws or regulations. 5. Please contact AKM sales representative for details as to environmental matters such as the RoHS compatibility of the Product. Please use the Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the EU RoHS Directive. AKM assumes no liability for damages or losses occurring as a result of noncompliance with applicable laws and regulations. 6. Resale of the Product with provisions different from the statement and/or technical features set forth in this document shall immediately void any warranty granted by AKM for the Product and shall not create or extend in any manner whatsoever, any liability of AKM. 7. This document may not be reproduced or duplicated, in any form, in whole or in part, without prior written consent of AKM. 014003800-E-02W 2015/07 - 19 -