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STMicroelectronics IIS2MDCTR
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- Part No.:
- IIS2MDCTR
- Manufacturer:
- STMicroelectronics
- Category:
- Linear, Compass (ICs)
- Package:
- 12-WFLGA
- Datasheet:
-
IIS2MDCTR.pdf
- Description:
- SENSOR MR I2C/SPI 12LGA
- Quantity:
- Payment:
- Shipping:
Inventory:35,146
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Product details
Overview
IIS2MDCTR from STMicroelectronics is a high-accuracy, ultra-low-power 3-axis digital magnetometer with ±50 gauss magnetic dynamic range, 16-bit output resolution, and dual SPI/I²C interfaces. It integrates hard-iron compensation, programmable interrupt generation, embedded self-test, and an on-chip temperature sensor. It serves as the magnetic field sensing element in compact IMUs and smart meter anti-tampering systems.
For engineers reviewing the IIS2MDCTR datasheet, IIS2MDCTR pinout, IIS2MDCTR application, or IIS2MDCTR equivalent, key selection criteria include its 150 Hz single-measurement ODR, 25 μA low-power mode current draw, LGA-12 package footprint, and support for I²C fast mode plus (1 MHz) and high-speed (3.4 MHz) operation.
Technical Context
The IIS2MDCTR implements a triaxial anisotropic magnetoresistive (AMR) sensing architecture with factory-trimmed offset and sensitivity calibration. Its signal chain includes low-noise amplifiers, 16-bit sigma-delta ADCs per axis, and configurable digital low-pass filtering.
It supports two primary operating modes: high-resolution (1130 μA @ 100 Hz) and low-power (25 μA @ 10 Hz), with programmable output data rates from 10 Hz to 150 Hz. The interrupt engine responds to magnetic threshold crossings, data-ready events, and self-test completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Magnetic Range | ±50 gauss - enables detection of Earth's field (≈0.5 G) and strong proximity magnets without saturation. |
| Output Resolution | 16-bit - delivers 0.061 mgauss/LSB sensitivity for precise heading calculation in compass applications. |
| Power Modes | HR (1130 μA @ 100 Hz) and LP (25 μA @ 10 Hz) - allows trade-off between noise floor (3–4.6 mgauss RMS) and battery life. |
| I²C Speed Support | Standard (100 kHz), Fast (400 kHz), Fast Mode Plus (1 MHz), High-Speed (3.4 MHz) - ensures compatibility with modern microcontrollers and real-time sensor fusion. |
| SPI Interface | 3-wire, 10 MHz max clock - provides deterministic timing for time-critical magnetic event capture. |
| Operating Temp | −40 °C to +85 °C - validated for industrial and smart utility meter environments. |
| Supply Voltage | Vdd: 1.71 V–3.6 V; Vdd_IO: 1.71 V–3.6 V - supports direct connection to 1.8 V or 3.3 V logic domains without level shifters. |
Pinout & Package
The IIS2MDCTR is housed in a 2.0 mm × 2.0 mm × 0.7 mm LGA-12 package with exposed pad for thermal and electrical grounding. Pin 1 is marked by a dot; orientation follows standard top-view labeling with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCL/SPC | I²C clock / SPI clock | Shared bidirectional clock input; requires pull-up for I²C, driven by master for SPI. |
| 3 CS | Interface mode select | High = I²C enabled / SPI idle; Low = SPI enabled / I²C disabled - eliminates need for separate protocol routing. |
| 4 SDA/SDI/SDO | Data I/O multiplex | Tri-state bidirectional line: I²C data, SPI input, or 3-wire SPI output - reduces PCB trace count. |
| 5 C1 | Internal oscillator capacitor | External 220 nF capacitor stabilizes internal timing reference for consistent ODR accuracy. |
| 6 & 8 GND | Analog/digital ground | Dual GND pins minimize ground bounce and improve magnetic noise immunity in sensitive measurements. |
| 7 INT/DRDY | Interrupt/data-ready output | Open-drain signal asserts on threshold crossing, new sample ready, or self-test completion - enables event-driven firmware. |
| 9 Vdd | Analog core supply | Provides power to magnetic sensor and ADC; decoupling required within 1 mm of pin. |
| 10 Vdd_IO | Digital I/O supply | Independent rail allows mixed-voltage system integration (e.g., 1.8 V core, 3.3 V host interface). |
Key Features
| Feature | Design Value |
|---|---|
| Hard-iron compensation | Configurable via offset registers (0x45–0x4A) - corrects for permanent magnetic distortion from nearby ferrous components. |
| Embedded self-test | Generates known 15–500 mgauss field internally - validates sensor functionality without external magnets during production test or field diagnostics. |
| Programmable interrupt generator | Supports magnetic threshold, polarity, latch control, and data-ready triggers - reduces host polling overhead and CPU wake-ups. |
| On-chip temperature sensor | 12-bit output, 8 digit/°C sensitivity - enables real-time thermal drift correction of magnetic offset and sensitivity coefficients. |
| ECOPACK® compliance | RoHS and "Green" certified - meets EU environmental directives for industrial and consumer deployments. |
Applications
| Smart Meter Anti-Tampering | Inertial Measurement Unit (IMU) |
|---|---|
Use Scenario: Detecting unauthorized magnetic interference used to stall mechanical energy meters. IC Role / Device Role / Timing Role: Magnetic field threshold detector with programmable interrupt output triggering MCU security routines. Use Value: Confirms tamper attempts via >150 Hz burst sampling and hard-iron compensated baseline stability across −40 °C to +85 °C. |
Use Scenario: Providing yaw angle reference in 6-DOF motion tracking for drones and robotics. IC Role / Device Role / Timing Role: 3-axis magnetometer fused with accelerometer/gyro data to resolve heading ambiguity during dynamic motion. Use Value: 16-bit resolution and <4.6 mgauss RMS noise enable sub-degree heading accuracy under low-OVR conditions. |
| Electronic Compass | Magnetic Switch / Presence Detection |
Use Scenario: Determining absolute orientation in handheld navigation devices and AR headsets. IC Role / Device Role / Timing Role: Primary magnetic field transducer feeding tilt-compensated compass algorithms. Use Value: Factory-calibrated sensitivity (±7% tolerance) and on-chip temperature compensation reduce calibration burden in end-product firmware. |
Use Scenario: Detecting lid closure, gear position, or actuator stroke in industrial controls and appliances. IC Role / Device Role / Timing Role: Threshold-based magnetic presence sensor with configurable hysteresis and latched interrupt output. Use Value: 25 μA low-power mode enables multi-year battery operation in wireless sensor nodes with periodic magnetic wake-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis magnetometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK09918C | AMR sensor with ±49.15 gauss range, 16-bit output, but no embedded temperature sensor; I²C-only interface. | Lacks integrated thermal compensation - requires external temperature measurement for offset correction. | Prefer when board space is constrained and thermal drift is mitigated via system-level calibration. |
| BMM150 | XYZ-axis Hall-effect sensor; ±1300 μT (±13 gauss) range; higher noise floor (~10 mgauss RMS); supports I²C/SPI. | Lower dynamic range limits use in strong-field environments; less suitable for precision compassing near motors or transformers. | Choose where cost sensitivity outweighs resolution needs and full ±50 gauss range is not required. |
Compared with AK09918C and BMM150, the IIS2MDCTR uniquely combines ±50 gauss range, on-die temperature sensing, and hard-iron compensation in a 2.0×2.0 mm LGA package-making it optimal for tamper-resistant metering and high-accuracy IMUs where thermal and magnetic interference must be actively corrected.
Availability
IIS2MDCTR is available at Aetrix Electronics and suitable for smart meter anti-tampering systems, inertial measurement units, and electronic compass modules requiring stable component supply across industrial temperature ranges and long product lifecycles.
Supply support for IIS2MDCTR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MEMS, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The IIS2MDCTR belongs to ST's iNEMO inertial module family, engineered specifically for ultra-low-power, high-accuracy magnetic sensing in space-constrained, battery-operated, and safety-critical applications.
FAQ
What is the function of the C1 pin on the IIS2MDCTR?
Pin 5 (C1) connects to an external 220 nF capacitor that stabilizes the internal oscillator used for timing control of the magnetic sensor's conversion cycle. This capacitor ensures accurate and repeatable output data rates across voltage and temperature variations, and omission causes ODR instability and increased measurement jitter.
Does the IIS2MDCTR require external calibration for compass applications?
No full external calibration is required: the device ships with factory-trimmed offset and sensitivity coefficients stored in non-volatile registers. However, system-level hard-iron compensation (via OFFSET_X/Y/Z_REG) is recommended to correct for PCB-level magnetic distortions, and temperature compensation using the on-chip sensor improves long-term heading accuracy.
Can the IIS2MDCTR operate with Vdd and Vdd_IO at different voltages?
Yes - Vdd (analog core) and Vdd_IO (digital I/O) are independently powered and support overlapping ranges (1.71 V–3.6 V). This allows interfacing with 1.8 V microcontrollers while powering the magnetic sensor from a 3.3 V rail, eliminating level-shifters and simplifying mixed-voltage board design.
How does the INT/DRDY pin behave in different interrupt configurations?
The INT/DRDY pin operates as an open-drain output. In threshold interrupt mode, it pulses low on magnetic field crossing; in data-ready mode, it asserts low each time new XYZ samples are available. Latching behavior is software-configurable via INT_CTRL_REG, enabling either auto-clear or manual clear depending on host processor latency requirements.
IIS2MDCTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 12-WFLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Magnetoresistive
- Axis:
- X, Y, Z
- Output Type:
- I2C, SPI
- Sensing Range:
- -
- Voltage - Supply:
- 1.71V ~ 3.6V
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Resolution:
- 16 b
- Bandwidth:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Features:
- Temperature Compensated
- Supplier Device Package:
- 12-LGA (2x2)
- Mounting Type:
- Surface Mount
IIS2MDCTR FAQ
1.How can I place an order for IIS2MDCTR through Aetrix?
Please submit a Request for Quotation (RFQ) for IIS2MDCTR 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 IIS2MDCTR reliable?
The price and inventory of IIS2MDCTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IIS2MDCTR is usually 5 days.
3.What payment methods are accepted for IIS2MDCTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IIS2MDCTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IIS2MDCTR?
IIS2MDCTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IIS2MDCTR 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 IIS2MDCTR?
For technical support, including IIS2MDCTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IIS2MDCTR requirements.
6.How does Aetrix verify that IIS2MDCTR is sourced from the original manufacturer or authorized distributors?
All IIS2MDCTR 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 IIS2MDCTR meets industry standards.
7.What is the process for return or replacement of IIS2MDCTR?
All IIS2MDCTR units undergo pre-shipment inspection (PSI). If there is an issue with IIS2MDCTR, 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 IIS2MDCTR part is unused and in its original packaging.
Return procedure for IIS2MDCTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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