Si721x Field Output Hall Effect Magnetic
Position Sensors Data Sheet
The Si7211/2/3/4/5/6/7 family of Hall-effect sensors from Silicon Labs combines a chop-
per-stabilized Hall element with a low-noise analog amplifier, 13-bit analog to digital con-
FEATURES
verter. After A/D conversion the magnetic field data is available in analog. PWM or
SENT format (depending on the part number). Leveraging Silicon Labs' proven CMOS
design techniques, the Si721x family incorporates digital signal processing to provide
precise compensation for temperature and offset drift.
• High-sensitivity Hall-Effect Sensor
• Low noise output corresponding to
magnetic field
• Integrated digital signal processing for
temperature and offset drift
compensation
Compared with existing Hall-effect sensors, the Si721x family offers industry-leading
sensitivity and low noise, which enables use with larger air gaps and smaller magnets.
For automotive applications, the Si721x family in SOT23 packages is AEC-Q100 quali-
fied.
• Low 50 nA Typical Sleep Current
Consumption
• Configurable Sensitivity, Output Polarity
and Sample Rate
In the simplest case, the Si721x devices are offered in a 3 pin SOT23 or TO92 pack-
ages with power, ground, and a single output pin that is signal corresponding to the
magnetic field in analog, PWM, or SENT format.
• Sensitivity Drift < ±3% Over Temperature
• Wide power supply voltage
• 1.7 to 5.5 V
The Si721x devices are also offered in a 5 pin SOT23 and an 8 pin DFN(coming soon)
packages where the additional pins can be used for sleep mode (DIS) or to activate an
on-chip coil for built in self-test (BISTb).
• 3.3 to 26.5 V
• AEC-Q100 Qualified for Automotive
Applications
Applications
• Configurable output options
• Analog
• Fluid level sensing
• Mechanical position sensing in consum-
• Control knobs and selector switches
er, industrial and automotive applica-
tions
• PWM
• SENT
• Camera image stabilization, zoom, and
autofocus
• Industry-Standard Packaging
• Surface-mount SOT-23 (3 or 5 pin)
• TO92 package
• DFN package (coming soon)
Hall
Element
Hall
Element
Si7211/17
Si7212/13/14/15
ADC
ADC
DIS (Optional)
VOUT
DIS (Optional)
Control Logic
Control Logic
PWM/SENT OUT
Temp / Offset /
Mechanical Stress
Compensation
Temp / Offset /
Mechanical Stress
Compensation
ALERT/BIST
(OPTIONAL)
ALERT/BIST
(OPTIONAL)
Reg
Reg
VDD
VDD
GND
GND
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