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. V+ V- (Pin 1) GMR Bridge Out+ Out- AAV003-10E I+ I- AAV003-10E Functional Diagram SB-00-022 February 2012 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: AAV00310E BridgeOutputvs InputCurrent 5VSupplyVoltage,25C 0.175 0.15 0.125 0.1 0.075 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 InputCurrent(A) Operating Specifications: Parameter Test Conditions Min. Typ. Max. Units Nominal Bridge Resistance 25C 5500 7000 8500 Ohms Sensitivity Operating 5 V Supply, 25C 0.06 0.08 0.10 mV/V-mA Frequency Response 100 KHz Operating Full Voltage and Linear Range of Current Measurement 80 80 mA Temperature Range Over Linear Current Range Output Linearity 99% Full Oper. Temperature Range Bridge Electrical Offset 25C 4 +4 mV/V Offset Drift over Full Temperature Range Zero Current 1.0 1.0 mV/V Bridge Supply Voltage 24 Volts VRMS Isolation Voltage See Note 1 240 On-Chip Current Strap Resistance 25C 0.25 0.35 Ohms On-Chip Current Strap Resistance +0.6 %/C Temperature Coefficient Temperature Range of Operation Operating 40 85 C Bridge Resistance Temperature Coeff. Operating +0.1 %/C 2 Bridge TCOV Operating 0.21 %/C 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 Min. Typ. Max. Units Absolute Maximum Current 600 600 mA Bridge Supply Voltage 30 Volts Storage Temperature 40 170 C Ambient Magnetic Field Unlimited Note: Exceeding Absolute Maximum Ratings may cause permanent damage. NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 (952) 829-9217 www.nve.com BridgeOutput(V)