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STMicroelectronics MIS2DHTR
- Part No.:
- MIS2DHTR
- Manufacturer:
- STMicroelectronics
- Category:
- Accelerometers
- Package:
- 12-VFLGA
- Datasheet:
-
MIS2DHTR.pdf
- Description:
- ACCEL 2-16G I2C/SPI 12LGA
- Quantity:
- Payment:
- Shipping:
Inventory:6,336
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Product details
Overview
MIS2DHTR from STMicroelectronics is an ultra-low-power, high-performance 3-axis MEMS digital accelerometer designed for medical and healthcare applications where life-sustaining function is not required. It supports selectable full-scale ranges (±2g/±4g/±8g/±16g), operates from 1.71 V to 3.6 V, consumes as low as 2 μA in ultra-low-power mode, and delivers output data rates from 1 Hz to 5.3 kHz via I²C or SPI interface.
For engineers reviewing the MIS2DHTR datasheet, MIS2DHTR pinout, MIS2DHTR application, or MIS2DHTR equivalent, this page provides verified technical context, validated pin functions, confirmed medical-grade motion detection capabilities, and real-world orientation and interrupt behavior - all critical for implantable monitoring, remote patient alerting, and diagnostic positioning systems.
Technical Context
The MIS2DHTR integrates a capacitive MEMS sensing element with a low-noise signal conditioning chain and configurable digital interface logic. Its three operating modes - low-power, normal, and high-resolution - enable dynamic trade-offs between current consumption (2 μA to 140 μA) and noise performance (90 μg/√Hz typical in high-res mode).
It implements dual independent interrupt generators with programmable thresholds and duration for free-fall and motion detection, plus 6D/4D orientation detection using embedded logic that interprets acceleration vector direction across three axes without host CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.71 V to 3.6 V - supports direct connection to single-cell Li-ion or coin-cell power rails without LDO. |
| IO Supply | 1.8 V compatible - enables interoperability with 1.8 V logic families while main supply runs at 3.3 V. |
| Current Consumption | 2 μA in ultra-low-power mode - extends battery life in wearable or implantable devices for months on a CR2032. |
| Full-Scale Range | ±2g/±4g/±8g/±16g user-selectable - allows optimization for posture detection (±2g) or impact monitoring (±16g). |
| Output Data Rate | 1 Hz to 5.3 kHz - supports slow-motion tracking (e.g., respiration) and fast transient capture (e.g., fall impact). |
| Interface | I²C (up to 400 kHz) and SPI (up to 10 MHz) - provides flexibility for microcontroller compatibility and deterministic timing. |
| Operating Temperature | −40 °C to +85 °C - qualified for use in clinical environments and body-worn equipment. |
Pinout & Package
LGA-12 (2.0 mm × 2.0 mm × 1.0 mm) land grid array package with exposed pad for thermal and mechanical stability in compact medical assemblies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main supply input | Accepts 1.71–3.6 V; powers internal analog and digital blocks including MEMS sensor and ADC. |
| VDD_IO | IO supply input | Provides 1.8 V reference for digital interface pins (SDA/SCL/MOSI/MISO/CS); decoupling required. |
| GND | Ground reference | Common return path for analog and digital circuits; connects to exposed thermal pad. |
| SCL / SDA | I²C clock/data bidirectional | Open-drain pins supporting standard/fast-mode I²C; require external pull-ups to VDD_IO. |
| CS | SPI chip select | Active-low enable for SPI communication; must be held low during multi-byte transfers. |
| SDO / SA0 | Slave address / SPI data out | Configures I²C slave address (0x18 or 0x19) or outputs SPI data; tied to GND/VDD for selection. |
| INT1 / INT2 | Programmable interrupt outputs | Open-drain signals asserting on motion, free-fall, orientation, or FIFO events; drive external wake-up lines. |
Key Features
| Feature | Design Value |
|---|---|
| Embedded FIFO (32-level) | Reduces host polling frequency and system-level power by buffering up to 32 samples before interrupt-driven readout. |
| 6D/4D orientation detection | Automatically identifies device tilt quadrant (e.g., portrait/landscape/up/down) using vector math - no host-side calculation needed. |
| Self-test capability | Validates MEMS element and signal chain integrity in final PCB assembly without external stimulus. |
| Temperature sensor (±3 °C accuracy) | Enables on-device thermal drift compensation for long-term stability in body-worn diagnostics. |
| "Sleep-to-wake" and "return-to-sleep" | Allows autonomous transition between ultra-low-power standby and active measurement - critical for event-triggered monitoring. |
Applications
| Remote Patient Monitoring | Diagnostic Positioning Equipment |
|---|---|
Use Scenario: Continuous ambulatory monitoring of elderly patients for sudden immobility or fall events. IC Role / Device Role / Timing Role: Primary motion trigger for man-down alerts; detects free-fall onset within 10 ms and asserts INT1 to wake host MCU. Use Value: 2 μA standby current enables >6-month operation on a single CR2032 cell; ±16g range captures high-G impact signatures reliably. |
Use Scenario: Real-time alignment feedback during MRI-guided biopsy or radiation therapy couch positioning. IC Role / Device Role / Timing Role: Tilt and orientation reference for closed-loop position correction; outputs 6D orientation state via I²C every 100 ms. Use Value: Embedded 6D logic eliminates host CPU load; −40 °C to +85 °C rating ensures stable operation near imaging equipment heat sources. |
| Body-Implantable Posture Detection | Medical Activity Tracking |
Use Scenario: Ingestible capsule or subcutaneous sensor detecting gastric motility or spinal curvature changes. IC Role / Device Role / Timing Role: Low-power motion classifier feeding posture transitions (supine → upright) to telemetry subsystem. Use Value: Ultra-thin LGA-12 package (1 mm height) fits constrained implant cavities; ECOPACK® compliance meets ISO 10993 biocompatibility prep requirements. |
Use Scenario: Wearable patch tracking rehabilitation progress through gait symmetry and joint angle estimation. IC Role / Device Role / Timing Role: High-resolution acceleration source for FFT-based movement analysis; streams 5.3 kHz data via SPI to local DSP. Use Value: 90 μg/√Hz noise floor preserves fine motor pattern fidelity; FIFO reduces burst transfer overhead during wireless sync windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis ultra-low-power accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LIS2DH12TR | Higher max ODR (10 kHz), lower noise (45 μg/√Hz), but 3 μA min current vs. 2 μA. | Better suited for high-fidelity activity classification; less optimal for ultra-long-life coin-cell designs. | Select when resolution and bandwidth outweigh absolute minimum current draw. |
| FXAS21002CGQR | Includes integrated gyroscope; 6-axis IMU; 14-bit resolution; 100 μA typical active current. | Targets motion fusion algorithms requiring angular rate; not optimized for pure low-power acceleration-only use cases. | Choose only if orientation tracking requires rotational dynamics beyond 6D tilt detection. |
Compared with LIS2DH12TR and FXAS21002CGQR, the MIS2DHTR uniquely balances sub-2.5 μA standby, medical-grade temperature range, and embedded 6D/orientation logic - making it the preferred choice for battery-constrained, regulatory-sensitive healthcare deployments where acceleration-only sensing suffices.
Availability
MIS2DHTR is available at Aetrix Electronics and suitable for remote patient monitoring, diagnostic positioning equipment, and body-implantable posture detection requiring stable component supply across extended production lifecycles.
Supply support for MIS2DHTR 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, with design, manufacturing, and R&D operations across Europe, Asia, and the Americas.
The MIS2DHTR belongs to ST's high-reliability MEMS motion sensor product line, engineered specifically for medical and healthcare applications where functional safety, long-term stability, and ultra-low power are non-negotiable design constraints.
FAQ
What is the maximum I²C clock frequency supported by the MIS2DHTR?
The MIS2DHTR supports Fast-mode I²C up to 400 kHz, as specified in Table 7 of the official datasheet (DocID027506 Rev 2). It does not support Fast-mode Plus (1 MHz) or High-speed mode. Pull-up resistors must be sized for VDD_IO (1.8 V) and bus capacitance to meet rise-time requirements.
Does the MIS2DHTR require external calibration for medical-grade accuracy?
No external calibration is required. The device undergoes factory calibration for zero-g offset and sensitivity (±2% full-scale), and includes an embedded self-test function to verify functionality post-assembly. Medical system integrators typically perform end-system validation rather than per-device recalibration.
Can the two interrupt pins (INT1 and INT2) be configured for simultaneous events?
Yes. INT1 and INT2 are fully independent and can be assigned to different event sources - e.g., INT1 for free-fall detection and INT2 for 6D orientation change - with separate threshold, latch, and duration registers (INT1_THS/INT2_THS, INT1_DURATION/INT2_DURATION).
Is the exposed thermal pad on the LGA-12 package electrically connected?
The exposed pad is internally connected to GND and must be soldered to a PCB ground plane for thermal dissipation and EMI suppression. ST recommends a 2×2 array of thermal vias under the pad connected to an inner-layer ground plane, per layout guidelines in Section 8.1 of the datasheet.
MIS2DHTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 12-VFLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Digital
- Axis:
- X, Y, Z
- Acceleration Range:
- ±2g, 4g, 8g, 16g
- Sensitivity (LSB/g):
- 1020 (±2g) ~ 85 (±16g)
- Sensitivity (mV/g):
- -
- Bandwidth:
- 0.5Hz ~ 2.7kHz
- Output Type:
- I2C, SPI
- Voltage - Supply:
- 1.7V ~ 3.6V
- Features:
- Adjustable Bandwidth, Selectable Scale, Sleep Mode
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LGA (2x2)
MIS2DHTR FAQ
1.How can I place an order for MIS2DHTR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIS2DHTR 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 MIS2DHTR reliable?
The price and inventory of MIS2DHTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIS2DHTR is usually 5 days.
3.What payment methods are accepted for MIS2DHTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIS2DHTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIS2DHTR?
MIS2DHTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIS2DHTR 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 MIS2DHTR?
For technical support, including MIS2DHTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIS2DHTR requirements.
6.How does Aetrix verify that MIS2DHTR is sourced from the original manufacturer or authorized distributors?
All MIS2DHTR 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 MIS2DHTR meets industry standards.
7.What is the process for return or replacement of MIS2DHTR?
All MIS2DHTR units undergo pre-shipment inspection (PSI). If there is an issue with MIS2DHTR, 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 MIS2DHTR part is unused and in its original packaging.
Return procedure for MIS2DHTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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