Switch/Latch Hall Effect Magnetic Position Sensor

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Lead Time 36 weeks
RoHS Status:
Unit Price:$0.45
Minumum Qty: 300
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The Si7201 family of Hall effect magnetic sensors and latches from Silicon Labs combines a chopper-stabilized Hall element with a low-noise analog amplifier, 13-bit analog-to-digital converter, and a flexible comparator circuit. Leveraging Silicon Labs' proven CMOS design techniques, the Si720x family incorporates digital signal processing to provide precise compensation for temperature and offset drift.

Compared with existing Hall effect sensors, the Si7201 family offers industry-leading sensitivity, which enables use with larger air gaps and smaller magnets. For battery-powered applications, the Si7201 family offers very low power consumption to improve operating life. For automotive applications, the Si720x family in SOT23 packages is AEC-Q100 qualified.

The Si7201 devices are offered in 3-pin SOT23 and TO-92 packages, with power, ground, and a single output pin that goes high or low as the magnetic field increases. With the three-pin package, tamper indication is by the pin going back to its zero field level at high magnetic field.

In the 5-pin SOT23 and 8-pin DFN(coming soon) packages, pins are available for both sleep mode activation and separate tamper indication.

• Replacement of reed switches in consumer, automotive, and security applications
• Automotive position sensing of HVAC valve, head rest, seat track, side mirrors, sunroof, door locks, and other mechanical devices
• BLDC motor control
• Camera  image  stabilization,  zoom, and autofocus
• Fluid level sensing
• Control knobs and selector switches
• General-purpose mechanical position sensing

Symmetry Electronics is an authorized Silicon Labs distributor.


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High-Sensitivity Hall Effect Sensor
Maximum BOP operating point/minimum field strength of <1.1 mT
Omnipolar or unipolar operation
Integrated digital signal processing for temperature and offset drift compensation
Low 400 nA Typical Current Consumption at 5 samples per second
Selectable / Programmable Sensitivity, Hysteresis, Output Polarity and Sample Rate
Sensitivity Drift < 3% over Temperature
Wide Power Supply Voltage
1.71 to 5.5 V
3.3 to 26.5 V
AEC-Q100 Qualified for Automotive
Selectable Output Options
Open-drain output
Digital high/low output
Industry-Standard Packaging
Surface mount SOT-23 (3 or 5 pin)
Through hole TO-92 (3-pin)
1.4 x 1.6 mm 8-pin DFN package (coming soon)

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