MLX91206LDC-CALB Melexis Inc, MLX91206LDC-CALB Datasheet - Page 18

• Manufacturer Part Number: MLX91206LDC-CALB
• Description: IC SENSOR TRIAXIS SOIC-8
• Manufacturer: Melexis Inc
• Series: Triaxis™r

Specifications of MLX91206LDC-CALB

• Current - Sensing: ±10mT
• Accuracy: ±0.75%
• Sensitivity: 100 ~ 700 mV/mT
• Current - Supply: 9mA
• Sensor Type: Hall Effect
• Voltage - Supply: 4.5 V ~ 5.5 V
• Output: Analog, Ratiometric
• Frequency: 50kHz ~ 90kHz
• Response Time: 8µs
• Polarization: Bidirectional
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: MLX91206LDC-CAL; MLX91206LDC-LB; MLX91206LDC-LB; MLX91206LDC-LB-TU

13 Application information
Low currents can be measured with the MLX91206 by
increasing the magnetic field via a coil around the sensor.
The sensitivity (output voltage vs. current in coil) of the
measurement will depend on the size of coil and number
of turns. Additional sensitivity and increased immunity to
external fields can be gained by adding a shield around
the coil. The bobbin provides very high dielectric isolation
making this a suitable solution for high voltage power
supplies with relative low currents. The output should be
scaled to obtain the maximum voltage for the highest
current to be measured in order to obtain the best
accuracy and resolution.
With a single conductor located on the PCB, currents in
the range of up to 30 amps can be measured. The sizing
of the PCB trace needs to take into account the current
handling capability and the total power dissipation. The
PCB trace needs to be thick enough and wide enough to
handle the RMS current continuously.
The differential output voltage for this configuration can be
approximated by the following equation:
Vout = 35 mV/A * I
For a current level of 30 A, the output will be approximately
1050 mV.
Another method of measuring high currents on PCB’s is to
use a large thick gauge copper trace capable of carrying
the current on the opposite side of the PCB. The
MLX91206 should be located near the centre of the trace,
however because the trace is wide, the output is less
sensitive to location on the PCB. This configuration also
has less sensitivity due to the distance and width of the
conductor.
3901091206
Rev 034
13.1 Low current measurement up to ±2 A
13.2 Medium current up to ±30 A
13.3 High current measurement up to ±600 A
Page 18 of 24
Triaxis Current Sensor IC
Figure 4: Medium current application
Figure 5: High current application
Figure 3: Low current application
MLX91206
Data Sheet
May-11