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SI7211-B-00-IVR

SiLSI7211-B-00-IVR

Silicon Labs
Hall Effect Sensor Single Axis SOT-23-3
41,295 in stock
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Overview

The SI7211-B-00-IVR is a high-sensitivity, single-axis Hall effect sensor that provides a linear analog voltage output proportional to the detected magnetic field. It features integrated digital signal processing to compensate for temperature and offset drift, ensuring a stable sensitivity drift of less than plus/minus 3 percent across its entire operating range. Operating from 2.25V to 5.5V, this sensor is designed for precise position and movement detection in space-constrained applications.

Why Choose This Part

The sensor excels due to its factory-calibrated temperature compensation, which maintains accuracy without requiring external calibration routines. Its low typical supply current of 5.5mA and a 50uA sleep mode make it suitable for power-sensitive designs, while the 7kHz bandwidth allows for high-speed position tracking.

Applications

Fluid Level Sensing
Utilizing a float with an integrated magnet to provide continuous level feedback via analog voltage.
Camera Lens Control
Providing precise feedback for image stabilization, zoom, and autofocus mechanisms in compact optical assemblies.
Mechanical Position Sensing
Detecting the displacement or angle of mechanical components in industrial control interfaces and consumer appliances.
Handheld Power Tools
Implementing trigger position sensing for variable speed control with high reliability and low power consumption.

Key Specifications

Axis Single
Bandwidth 7kHz
Technology Hall Effect
Output Type Analog Voltage
Mounting Type Surface Mount
Sensing Range +/-20mT
Package / Case TO-236-3, SC-59, SOT-23-3
Voltage - Supply 2.25V ~ 5.5V
Operating Temperature -40degC ~ 125degC
Current - Supply (Max) 5.5mA (Typ)
Supplier Device Package SOT-23-3

Getting Started

To evaluate this sensor, interface the analog output pin directly to a microcontroller ADC input and provide a stable decoupling capacitor between VDD and GND. For rapid prototyping, Silicon Labs offers the Si72xx-EVAL-KIT which includes plug-in boards for various output types in the Si72xx family. Ensure the magnetic field remains within the plus/minus 20mT range to maintain linear operation.

Also Consider

DRV5055 TITexas Instruments - Offers a similar linear Hall effect performance with various sensitivity options in a SOT-23 package.
TMAG5170 TITexas Instruments - Provides high-precision 3-axis sensing via SPI if multi-axis detection or digital output is required.
A1304 Allegro MicroSystems - A cost-effective linear Hall effect sensor with a ratiometric analog output in a 3-pin SOT-23W.