AAV003-10E

Datasheet AAV003-10E Current Sensor Key Features  For Low Current Detection  On-Chip Current Strap for Precise Operation  −80 mA to +80 mA Linear Range  Sensitivity up to 2 mV/mA  AC or DC Measurement  Ultraminiature TDFN Package Description The AAV003-10E is a high linearity, extremely low hysteresis GMR current sensor with an on-chip current strap. A GMR bridge sensor element close to the current strap senses the magnetic field created by the current. The GMR sensor element uses a unique, bipolar output, low hysteresis GMR material for excellent accuracy. The four terminals of the bridge sensor are available externally. The output terminals of the bridge provide a bipolar voltage signal proportional to the current through the strap. AAV003-10E Functional Diagram NVE Corporation • 11409 Valley View Road, Eden Prairie, MN 55344-3617 • (952) 829-9217 • www.nve.com AAV003-10E Current Sensor Operation A representative transfer curve is shown below: AAV003-10E B ridg e O utput vs Input C urrent 5V S upp ly Voltag e, 25C 0.175 0.15 0.125 0.1 0.075 B ridg e O utput (V) 0.05 0.025 0 -0.025 -0.05 -0.075 -0.1 -0.125 -0.15 -0.175 -0.6000 -0.5000 -0.4000 -0.3000 -0.2000 -0.1000 0.0000 0.1000 0.2000 0.3000 0.4000 0.5000 0.6000 Input C urrent (A) Operating Specifications: Parameter Nominal Bridge Resistance Sensitivity Frequency Response Linear Range of Current Measurement Output Linearity Bridge Electrical Offset Offset Drift over Full Temperature Range Bridge Supply Voltage Isolation Voltage On-Chip Current Strap Resistance On-Chip Current Strap Resistance Temperature Coefficient Temperature Range of Operation Bridge Resistance Temperature Coeff. Bridge TCOV2 Test Conditions 25°C Operating; 5 V Supply, 25°C Min. 5500 0.06 100 Operating; Full Voltage and Temperature Range Over Linear Current Range; Full Oper. Temperature Range 25°C Zero Current 99% See Note 1 25°C 120 0.25 Typ. 7000 0.08 −80 −4 −1.0 Max. 8500 0.10 Units Ohms mV/V-mA KHz 80 mA +4 1.0 24 mV/V mV/V |Volts| 0.35 Ohms VRMS +0.6 Operating Operating Operating −40 %/C C %/C %/C 85 +0.1 −0.21 Notes: 1. For isolation measurement, the sensor is considered a two terminal device: I+ and I- pins (pins 3 and 4) are shorted, and bridge pins (pins 1, 2, 5, and 6) are shorted. 2. TCOV is the percent change in output signal over temperature, with a constant voltage source powering the part. Absolute Maximum Ratings: Parameter Absolute Maximum Current Bridge Supply Voltage Storage Temperature Ambient Magnetic Field NVE Corporation Min. −600 −40 Typ. Max. 600 30 170 Unlimited Units mA Volts C Note: Exceeding Absolute Maximum Ratings may cause permanent damage. • 11409 Valley View Road, Eden Prairie, MN 55344-3617 • (952) 829-9217 • www.nve.com AAV003-10E Current Sensor External Magnetic Fields and Hysteresis Effects The AAV003-10E sensor elements are shielded to make them insensitive to external magnetic fields, however, shielding is not 100% effective, so external fields applied to the sensor should be avoided for the most repeatable, accurate operation. When exposed to magnetic fields over 50 Oe (5 mT), the characteristic of the sensor can be disturbed, causing a hysteresis effect that will produce a non-linear response. A magnetic field of 50 Oe is a large field that should not be encountered during normal operation. However, in case the sensor is exposed to such a field, a degauss pulse train can be applied to the sensor to restore the original response. The sensor cannot be permanently damaged by any magnetic field, no matter how large and it can always be restored after exposure to a large field with a degauss signal. This same effect can be observed when a large constant current (>200 mA) is applied to the on-chip current strap, or a smaller constant current (>100 mA) at high temperatures (>85°C). Again in these cases, correct operation of the sensor is restored with a degauss signal. The degauss signal should consist of at least four current pulses of alternating polarity, with a pulse width of at least 50 µs and an initial current pulse of 600 mA: Temperature Characteristics Typical output over temperature is shown in the graph below: AAV003-10E Output over Temperature - T ypic al 0.200 0.150 0.100 O utput S ig nal (V) 0.050 0.000 -0.050 -0.100 -0.150 -0.200 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 O n-C hip S trap C urrent (A) -50 NVE Corporation • -20 25 C 85 C 11409 Valley View Road, Eden Prairie, MN 55344-3617 125 C • (952) 829-9217 • www.nve.com AAV003-10E Current Sensor Pinout The AAV003-10E pinout is as follows: Pin 1 2 3 4 5 6 Terminal V+ Out+ I+ I− Out− V− Description Supply Voltage Positive Differential Bridge Output Current Terminal 1 Current Terminal 2 Negative Differential Bridge Output Ground Notes: 1. Pins are numbered counterclockwise around the package. 2. Current entering the chip via terminal I+ and leaving the chip via terminal I− produces a positive bridge output. Package Drawing – TDFN6 2.5 mm x 2.5 mm Notes:     Dimensions in mm. TDFN6 package has thermal power dissipation of 320°C/Watt in free air. Attaching the package to a circuit board improves thermal performance, especially if the center pad is also soldered to the board. The center pad may be left floating or connected to ground. ©NVE Corporation All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. NVE Corporation • 11409 Valley View Road, Eden Prairie, MN 55344-3617 • (952) 829-9217 • www.nve.com AAV003-10E Current Sensor Datasheet Limitations The information and data provided in datasheets shall define the specification of the product as agreed between NVE and its customer, unless NVE and customer have explicitly agreed otherwise in writing. All specifications are based on NVE test protocols. In no event however, shall an agreement be valid in which the NVE product is deemed to offer functions and qualities beyond those described in the datasheet. Limited Warranty and Liability Information in this document is believed to be accurate and reliable. However, NVE does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. In no event shall NVE be liable for any indirect, incidental, punitive, special or consequential damages (including, without limitation, lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Right to Make Changes NVE reserves the right to make changes to information published in this document including, without limitation, specifications and product descriptions at any time and without notice. This document supersedes and replaces all information supplied prior to its publication. Use in Life-Critical or Safety-Critical Applications Unless NVE and a customer explicitly agree otherwise in writing, NVE products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical devices or equipment. NVE accepts no liability for inclusion or use of NVE products in such applications and such inclusion or use is at the customer’s own risk. Should the customer use NVE products for such application whether authorized by NVE or not, the customer shall indemnify and hold NVE harmless against all claims and damages. Applications Applications described in this datasheet are illustrative only. 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The customer is responsible for all necessary testing for the customer’s applications and products using NVE products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customers. NVE accepts no liability in this respect. Limiting Values Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the recommended operating conditions of the datasheet is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. Terms and Conditions of Sale In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NVE hereby expressly objects to applying the customer’s general terms and conditions with regard to the purchase of NVE products by customer. No Offer to Sell or License Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. Export Control This document as well as the items described herein may be subject to export control regulations. Export might require a prior authorization from national authorities. Automotive Qualified Products Unless the datasheet expressly states that a specific NVE product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. NVE accepts no liability for inclusion or use of non-automotive qualified products in automotive equipment or applications. In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without NVE’s warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond NVE’s specifications such use shall be solely at customer’s own risk, and (c) customer fully indemnifies NVE for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond NVE’s standard warranty and NVE’s product specifications. NVE Corporation • 11409 Valley View Road, Eden Prairie, MN 55344-3617 • (952) 829-9217 • www.nve.com AAV003-10E Current Sensor Revision History SB-00-022 Changes SB-00-022B Feb 2021  Changed Isolation voltage. SB-00-022A Feb 2012  Initial Release NVE Corporation • 11409 Valley View Road, Eden Prairie, MN 55344-3617 • (952) 829-9217 • www.nve.com