Position Sensors. Si7214 Datasheet

Si7214 Sensors. Datasheet pdf. Equivalent

Part Si7214
Description Field Output Hall Effect Magnetic Position Sensors
Feature Si721x Field Output Hall Effect Magnetic Position Sensors Data Sheet The Si7211/2/3/4/5/6/7 family .
Manufacture Silicon Laboratories
Datasheet
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Si7214
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-
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.
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.
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.
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).
Applications
• Mechanical position sensing in consum-
er, industrial applications
• Camera image stabilization, zoom, and
autofocus
• Fluid level sensing
• Control knobs and selector switches
FEATURES
• High-sensitivity Hall-Effect Sensor
• Low noise output corresponding to
magnetic field
• Integrated digital signal processing for
temperature and offset drift
compensation
• Low 50 nA Typical Sleep Current
Consumption
• Configurable Sensitivity, Output Polarity
and Sample Rate
• Sensitivity Drift < ±3% Over Temperature
• Wide power supply voltage
• 1.7 to 5.5 V
• 3.3 to 26.5 V
• Configurable output options
• Analog
• PWM
• SENT
• Industry-Standard Packaging
• Surface-mount SOT-23 (3 or 5 pin)
• TO92 package
• DFN package (coming soon)
Hall
Element
VDD
Reg
GND
Si7211/17
ADC
Temp / Offset /
Mechanical Stress
Compensation
Control Logic
DIS (Optional)
VOUT
ALERT/BIST
(OPTIONAL)
VDD
Hall
Element
Reg
Si7212/13/14/15
ADC
Temp / Offset /
Mechanical Stress
Compensation
Control Logic
GND
DIS (Optional)
PWM/SENT OUT
ALERT/BIST
(OPTIONAL)
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Si7214
Table of Contents
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3. Analog Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4. PWM Output Description . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5. SENT Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.1 tSENT Status Nibble . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
5.2 SENT Data Nibbles . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
5.3 CRC Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
5.4 SENT Pause Pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
5.5 SENT Frame Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
5.6 BIST Activation During SENT Operation . . . . . . . . . . . . . . . . . . . . .13
6. Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
7. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
8. Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.1 SOT23 3-Pin Package . . . . . . . . . . . . . . . . . . . . . . . . . . .18
8.2 SOT23-5 5-Pin Package . . . . . . . . . . . . . . . . . . . . . . . . . . .20
8.3 TO92S 3-Pin Package . . . . . . . . . . . . . . . . . . . . . . . . . . .22
9. Land Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.1 SOT23 3-Pin PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . .23
9.2 SOT23-5 5-Pin PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . .24
10. Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.1 SOT23 3-Pin Top Marking . . . . . . . . . . . . . . . . . . . . . . . . .25
10.2 SOT23-5 5-Pin Top Marking . . . . . . . . . . . . . . . . . . . . . . . . .26
10.3 TO92 Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
11. Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
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