My Inquiry
My Account
Silicon Labs SI7210-B-15-IM2R
- Part No.:
- SI7210-B-15-IM2R
- Manufacturer:
- Silicon Labs
- Category:
- Linear, Compass (ICs)
- Package:
- 8-XFDFN
- Datasheet:
-
SI7210-B-15-IM2R.pdf
- Description:
- IC HALL SENSOR 0X33 DFN8
- Quantity:
- Payment:
- Shipping:
Inventory:4,162
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI7210-B-15-IM2R from Silicon Labs is a high-sensitivity I²C Hall effect magnetic position and temperature sensor in an 8-pin DFN package (1.4 × 1.6 mm), featuring a 13-bit ADC, ±20 mT full-scale range, ±1°C temperature measurement accuracy, and 50 nA sleep current. It delivers precise z-axis magnetic field sensing for contactless position detection in industrial encoders and fluid level systems.
For engineers reviewing the SI7210-B-15-IM2R datasheet, SI7210-B-15-IM2R pinout, SI7210-B-15-IM2R application, or SI7210-B-15-IM2R equivalent, key selection criteria include its factory-configured 20 mT range, DFN-8 thermal performance (θJA = 107.6°C/W), I²C address 0x30, and integrated tamper detection threshold - all critical for battery-powered security and motion sensing designs.
Technical Context
The SI7210-B-15-IM2R implements a chopper-stabilized Hall element with digital signal processing for real-time temperature and offset drift compensation. Its 13-bit signal path supports configurable digital filtering (FIR/IIR) and programmable output thresholds (BOP/BRP) via I²C registers 0xC6–0xC7.
It operates across 1.7–5.5 V supply and -40°C to +125°C ambient, with factory-set parameters including I²C address 0x30, 20 mT full-scale range, and DFN-8 package-specific offset calibration (±350 µT typical). The ALERT pin is preconfigured as open-drain with tamper detection enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±20 mT - Enables high-resolution position sensing with small magnets or large air gaps in rotary encoders and valve position feedback. |
| ADC Resolution | 13-bit signed output (0.00125 mT/LSB) - Delivers 4096-count linear field measurement with <30 µT RMS noise at 5 V. |
| Temperature Accuracy | ±1°C (SOT23-5), ±4°C (DFN-8) - Validated over -10°C to +85°C; used for ambient compensation of magnetic response in industrial environments. |
| I²C Interface | Fast-mode up to 400 kHz, 4 selectable addresses (0x30–0x33) - Supports multi-sensor bus configurations without address conflict in motor control subsystems. |
| Sleep Current | 50 nA at 3.3 V, 25°C - Extends battery life to years in wireless IoT sensors requiring periodic wake-up for magnetic event detection. |
| Package Thermal Resistance | θJA = 107.6°C/W (DFN-8, JEDEC 4-layer board) - Enables reliable operation at +125°C ambient in sealed utility meter housings. |
| Magnetic Offset | ±350 µT (DFN-8, full temp/VDD range) - Factory-trimmed to minimize zero-field error in precision linear position applications. |
Pinout & Package
SI7210-B-15-IM2R uses an industry-standard 1.4 × 1.6 mm 8-pin TDFN package with wettable flanks, optimized for automated optical inspection and thermal dissipation in space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | 1.7–5.5 V rail; internal regulator powers analog front-end and digital logic; decoupling capacitor required within 1 mm. |
| GND | Ground reference | Analog and digital ground shared; low-impedance connection essential for 30 µT RMS noise performance. |
| SCL | I²C clock input | Open-drain compatible; requires external pull-up; supports 400 kHz timing with 1.3 µs LOW period minimum. |
| SDA | I²C data bidirectional | Open-drain; shares pull-up with SCL; supports standard/fast-mode protocols and repeated START sequences. |
| ALERT | Digital alert output | Factory-configured open-drain; asserts low when magnetic field crosses BOP/BRP thresholds or tamper condition occurs. |
| NC | No connect | Pins 6 and 7 are unconnected; must remain floating per datasheet Figure 6.2 - no routing or soldering allowed. |
| NC | No connect | See Pin 6 - mechanical placeholder only; no internal bond wire or circuit connection. |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic switching | Configurable via sw_fieldpolsel = 00b - detects both north and south pole proximity without polarity alignment in knob or slider position sensing. |
| Tamper detection | Programmable threshold (512–7936 LSB) - triggers ALERT pin to zero-field state when strong external magnet is applied, preventing bypass in security door sensors. |
| Digital filtering | FIR burst averaging (1–4096 samples) or IIR recursive filtering - reduces RMS noise from 30 µT to <5 µT for stable readings in EMI-heavy motor drive environments. |
| Self-test coil | On-chip test coil with polarity control - enables in-system verification of sensor functionality without external magnets during production test or field diagnostics. |
| Factory OTP configuration | Preloaded registers for 20 mT scale, I²C address 0x30, and open-drain ALERT - eliminates boot-time initialization overhead in resource-constrained microcontrollers. |
Applications
| Industrial Rotary Encoder | Smart Utility Meter Tamper Detection |
|---|---|
Use Scenario: Detecting angular position of rotating shafts in HVAC dampers and servo motors using embedded ring magnets. IC Role / Device Role / Timing Role: Z-axis Hall sensor digitizing magnetic flux density into 13-bit I²C data; provides 0.00125 mT resolution for sub-degree angular interpolation. Use Value: High sensitivity (±20 mT FS) allows use of low-cost ferrite magnets at 2 mm air gap, reducing BOM cost by 35% vs. legacy reed switches. | Use Scenario: Monitoring meter cover integrity in smart electricity meters to detect unauthorized access attempts. IC Role / Device Role / Timing Role: Magnetic tamper detector asserting open-drain ALERT pin when external magnet exceeds factory-set threshold (e.g., 3968 LSB = 19.84 mT on 20 mT scale). Use Value: Tamper response time <1 ms ensures immediate flagging before meter firmware can be compromised, meeting ANSI C12.1 security requirements. |
| Consumer Appliance Knob Position | Battery-Powered Fluid Level Sensor |
Use Scenario: Contactless rotation sensing for touchless control knobs in ovens and washing machines. IC Role / Device Role / Timing Role: Omnipolar switch (sw_fieldpolsel = 00b) generating direction-agnostic edge pulses on magnetic pole transitions; I²C reads absolute position every 100 ms. Use Value: 50 nA sleep current extends 2×AA battery life beyond 5 years, eliminating maintenance in sealed appliance housings. | Use Scenario: Measuring liquid height in diesel tanks using float-mounted magnets and fixed-position SI7210-B-15-IM2R sensors. IC Role / Device Role / Timing Role: High-linearity magnetic field transducer converting float displacement into calibrated 13-bit I²C output; temperature sensor corrects for fuel thermal expansion. Use Value: ±1°C temperature accuracy enables ±0.5% volume error correction across -20°C to +60°C operating range, meeting ISO 8573-1 Class 4 purity specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall effect magnetic sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Allegro A1324LLHLT-T | Analog output (ratiometric voltage), no I²C interface or digital filtering; ±5 mT sensitivity; SOIC-8 package (3×4.9 mm). | Lacks programmable thresholds, tamper detection, and temperature reporting; suited for simple ON/OFF switching only. | Select when system lacks I²C capability or requires analog voltage output directly to MCU ADC. |
| Melexis MLX90393ELD-ABA-000-TU | 3-axis I²C Hall sensor with ±50 mT FS, 16-bit resolution, and built-in EEPROM; 3×3 mm DFN package. | Supports XYZ vector field measurement and user-programmable calibration; higher cost and complexity for single-axis needs. | Select when multi-axis field mapping or field vector angle calculation is required beyond z-axis magnitude. |
Compared with A1324LLHLT-T, SI7210-B-15-IM2R offers digital intelligence (I²C config, filtering, tamper) in half the footprint; versus MLX90393ELD-ABA-000-TU, it trades 3-axis flexibility for lower power (50 nA vs. 1.2 µA sleep) and simpler firmware integration in single-axis position tasks.
Availability
SI7210-B-15-IM2R is available at Aetrix Electronics and suitable for industrial rotary encoders, smart utility meter tamper detection, and battery-powered fluid level sensors requiring stable component supply across extended product lifecycles.
Supply support for SI7210-B-15-IM2R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Silicon Labs is a fabless semiconductor company specializing in secure, intelligent wireless and sensing solutions for IoT, industrial, and consumer markets.
The Si7210 product line was designed specifically for high-accuracy, low-power magnetic position and temperature sensing in space-constrained, battery-operated, and security-critical applications - emphasizing factory-configurability and robustness against environmental drift.
FAQ
What is the factory-configured I²C address for SI7210-B-15-IM2R?
The SI7210-B-15-IM2R has a factory-programmed I²C address of 0x30 (binary 0110000). This is fixed per the part number suffix "-B-15" and cannot be changed in-system. Other variants in the Si7210 family use 0x31, 0x32, or 0x33 - ensuring up to four SI7210-B-15-IM2R devices can coexist on the same I²C bus without address conflict.
Does SI7210-B-15-IM2R support both magnetic field and temperature measurements?
Yes, SI7210-B-15-IM2R integrates dual sensing: a chopper-stabilized Hall element for z-axis magnetic field (±20 mT) and a calibrated on-die temperature sensor with ±1°C accuracy over -10°C to +85°C. Temperature data is read via I²C register dspsigsel = 0x01, enabling real-time compensation of magnetic gain drift in industrial environments.
What is the purpose of the ALERT pin on SI7210-B-15-IM2R?
The ALERT pin on SI7210-B-15-IM2R is a factory-configured open-drain output that asserts low when the measured magnetic field crosses user-defined operate/release thresholds (BOP/BRP) or when the tamper threshold is exceeded. It eliminates MCU polling overhead in position-switching applications like control knobs and security latches.
How does the tamper detection feature work in SI7210-B-15-IM2R?
In SI7210-B-15-IM2R, tamper detection compares the magnetic field to a factory-set threshold (e.g., 3968 LSB = 19.84 mT on 20 mT scale). If exceeded, the ALERT pin immediately drives to its zero-field logic state - mimicking "no magnet present" - signaling physical intrusion. This behavior is enabled by default and requires no runtime configuration.
Is SI7210-B-15-IM2R suitable for automotive applications?
No, SI7210-B-15-IM2R is not qualified for automotive use. It is rated for industrial temperature range (-40°C to +125°C) but lacks AEC-Q200 qualification, automotive-grade PPAP documentation, or failure-in-time (FIT) rate reporting. For automotive position sensing, Silicon Labs recommends the AEC-Q100 qualified Si7211 series instead of SI7210-B-15-IM2R.
SI7210-B-15-IM2R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Series:
- -
- Package/Case:
- 8-XFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- I2C
- Sensing Range:
- ±20mT
- Voltage - Supply:
- 1.71V ~ 5.5V
- Current - Supply (Max):
- 8.5mA
- Current - Output (Max):
- -
- Resolution:
- 13 b
- Bandwidth:
- 20kHz
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Features:
- Programmable
- Supplier Device Package:
- 8-DFN (1.4x1.6)
- Mounting Type:
- Surface Mount
SI7210-B-15-IM2R FAQ
1.How can I place an order for SI7210-B-15-IM2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI7210-B-15-IM2R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SI7210-B-15-IM2R reliable?
The price and inventory of SI7210-B-15-IM2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI7210-B-15-IM2R is usually 5 days.
3.What payment methods are accepted for SI7210-B-15-IM2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI7210-B-15-IM2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI7210-B-15-IM2R?
SI7210-B-15-IM2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI7210-B-15-IM2R order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SI7210-B-15-IM2R?
For technical support, including SI7210-B-15-IM2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI7210-B-15-IM2R requirements.
6.How does Aetrix verify that SI7210-B-15-IM2R is sourced from the original manufacturer or authorized distributors?
All SI7210-B-15-IM2R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI7210-B-15-IM2R meets industry standards.
7.What is the process for return or replacement of SI7210-B-15-IM2R?
All SI7210-B-15-IM2R units undergo pre-shipment inspection (PSI). If there is an issue with SI7210-B-15-IM2R, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SI7210-B-15-IM2R part is unused and in its original packaging.
Return procedure for SI7210-B-15-IM2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI7210-B-15-IM2R Tags
-
DRV5053VAQDBZR
Texas Instruments
-
MMC5603NJ
Memsic Inc.
-
DRV5055A1QDBZR
Texas Instruments
-
MLX90392ELQ-AAA-011-RE
Melexis Technologies NV
-
CT100LW-HS6
Allegro MicroSystems
-
DRV5056A1ELPGMQ1
Texas Instruments
-
A1304ELHLX-T
Allegro MicroSystems
-
MMC5633NJL
Memsic Inc.
-
A1308KUA-2-T
Allegro MicroSystems
-
A1308KUA-1-T
Allegro MicroSystems
-
SI7210-B-04-IVR
Silicon Labs
-
A1308LLHLT-2-T
Allegro MicroSystems
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
