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- FEATURES
bit analog-to-digital converter, and a flexible comparator circuit. Leveraging Silicon Labs'
proven CMOS design techniques, the Si720x family incorporates digital signal process-
High-Sensitivity Hall Effect Sensor
ing to provide precise compensation for temperature and offset drift.
Maximum B operating point/minimum
OP
field strength of <1.1 mT
Compared with existing Hall effect sensors, the Si720x family offers industry-leading
Omnipolar or unipolar operation
sensitivity, which enables use with larger air gaps and smaller magnets. For battery-
Integrated digital signal processing for
powered applications, the Si720x family offers very low power consumption to improve
temperature and offset drift
operating life. For automotive applications, the Si720x family in SOT23 packages is
compensation
AEC-Q100 qualified.
Low 400 nA Typical Current Consumption
at 5 samples per second
The Si720x devices are offered in 3-pin SOT23 and TO-92 packages, with power,
Selectable / Programmable Sensitivity,
ground, and a single output pin that goes high or low as the magnetic field increases.
Hysteresis, Output Polarity and Sample
With the three-pin package, tamper indication is by the pin going back to its zero field
Rate
level at high magnetic field.
Sensitivity Drift < 3% over Temperature
In the 5-pin SOT23 and 8-pin DFN(coming soon) packages, pins are available for both
Wide Power Supply Voltage
sleep mode activation and separate tamper indication.
1.71 to 5.5 V
3.3 to 26.5 V
Applications:
AEC-Q100 Qualified for Automotive
Camera image stabilization, zoom,
Replacement of reed switches in con-
Applications
and autofocus
sumer, automotive, and security applica-
Selectable Output Options
Fluid level sensing
tions
Open-drain output
Automotive position sensing of HVAC Control knobs and selector switches
Digital high/low output
valve, head rest, seat track, side mir-
General-purpose mechanical position
Industry-Standard Packaging
rors, sunroof, door locks, and other me-
sensing
Surface mount SOT-23 (3 or 5 pin)
chanical devices
Through hole TO-92 (3-pin)
BLDC motor control
1.4 x 1.6 mm 8-pin DFN package
(coming soon)
Hall
Si7201/2/3/4/5/6
Element
ADC
DIS (Optional)
Control Logic OUT1
Temp / Offset /
OUT2 / TAMPERb
Reg Mechanical Stress
VDD
(Optional)
Compensation
GND
silabs.com | Building a more connected world. Rev. 1.0 Table of Contents
1. Electrical Specifications ...........................3
2. Functional Description............................8
3. DISABLE Pin Timing ...........................10
4. Pin Description .............................11
5. Ordering Guide .............................13
6. Package Outline ............................. 19
6.1 SOT23 3-Pin Package ...........................19
6.2 SOT23-5 5-Pin Package...........................21
6.3 TO92S 3-Pin Package ...........................23
7. Land Patterns .............................. 24
7.1 SOT23 3-Pin PCB Land Pattern ........................24
7.2 SOT23-5 5-Pin PCB Land Pattern .......................25
8. Top Marking............................... 26
8.1 SOT23 3-Pin Top Marking..........................26
8.2 SOT23-5 5-Pin Top Marking .........................27
8.3 TO92 Top Marking.............................27
9. Revision History ............................. 28
silabs.com | Building a more connected world. Rev. 1.0 | 2