AG920-07E NVE, AG920-07E Datasheet - Page 119

• Manufacturer Part Number: AG920-07E
• Description: KIT EVALUATION GT SENSOR
• Manufacturer: NVE

Specifications of AG920-07E

• Sensor Type: Magnetic. GMR (Giant Magnetoresistive)
• Interface: Analog
• Embedded: No
• Utilized Ic / Part: ABL & AKL Series GT Sensors
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Sensitivity: -
• Sensing Range: -
• Other names: 391-1063

DATA ANALYSIS- One To Ten Amps
Currents (1-10 A) were run through the 90 and 60-mil traces found on the PCB in NVE’s Current
Sensor Evaluation Kit AG003-01. An AA003-02 sensor was placed over the 90 and 60-mil traces and
different levels of DC current were run through the traces. This current and the corresponding output
from the sensors are shown in the following graphs.
The sensor was supplied with 8.33V and was hand-soldered over the trace. The trace is 0.090” wide
and 0.0023 ± 0.0002" thick. The marks on the graph are output error bars which cover the expected
error from this part due to intrinsic hysteresis and measurement errors. The current was swept from
zero to ten Amps and back to zero multiple times. The output voltage at specific current levels was
analyzed and an output voltage precision was determined to have a relative error of approximately
±0.7% with errors of up to 2% possible at low currents.
A linear fit on the data above shows a 29.8 ± 0.2 mV/A correlation in this configuration. The sensor
utilizes a Wheatstone bridge and thus the applied voltage across the bridge is directly related to the
output. By dividing the slope by 8.33V, we get a more useful number of 3.57 ± 0.02 mV/V/A. With
this number, the user can determine the expected output for any applied voltage.
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www.nve.com
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A A003-02 over 0.090" wide,
0.0023" thick trace
phone: [phone] fax: [phone]
mV Out = 29.8 ± 0.2A
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Current(A)
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Application Notes
@8.33V
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