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SI7201-B-07-IVR

Description
MAGNETIC SWITCH OMNIPOLAR
CategoryThe sensor   
File Size615KB,29 Pages
ManufacturerSilicon Laboratories Inc
Environmental Compliance
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SI7201-B-07-IVR Overview

MAGNETIC SWITCH OMNIPOLAR

SI7201-B-07-IVR Parametric

Parameter NameAttribute value
FunctionOmnipolar, unipolar switch
technologyHall Effect
polarizationunidirectional
Sensing range-
Test Conditions0°C ~ 70°C(-40°C ~ 125°C)
Voltage - Power1.7 V ~ 5.5 V
Current - Power (maximum)8.5mA
Current - Output (maximum)-
Output typeswitch
characteristicProgrammable
Operating temperature-40°C ~ 125°C
Package/casingTO-236-3,SC-59,SOT-23-3
Supplier device packagingSOT-23-3
Si720x Switch/Latch Hall Effect Magnetic
Position Sensor Data Sheet
The Si7201/2/3/4/5/6 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 process-
ing to provide precise compensation for temperature and offset drift.
Compared with existing Hall effect sensors, the Si720x family offers industry-leading
sensitivity, which enables use with larger air gaps and smaller magnets. For battery-
powered applications, the Si720x family offers very low power consumption to improve
operating life. For automotive applications, the Si720x family in SOT23 packages is
AEC-Q100 qualified.
The Si720x 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.
Applications:
• Replacement of reed switches in con-
sumer, automotive, and security applica-
tions
• Automotive position sensing of HVAC
valve, head rest, seat track, side mir-
rors, sunroof, door locks, and other me-
chanical devices
• BLDC motor control
• Camera image stabilization, zoom,
and autofocus
• Fluid level sensing
• Control knobs and selector switches
• General-purpose mechanical position
sensing
FEATURES
• High-Sensitivity Hall Effect Sensor
• Maximum B
OP
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
Applications
• 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)
Hall
Element
Si7201/2/3/4/5/6
ADC
Control Logic
DIS (Optional)
OUT1
OUT2 / TAMPERb
(Optional)
VDD
Reg
Temp / Offset /
Mechanical Stress
Compensation
GND
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