My Inquiry
My Account
STMicroelectronics AIS2IHTR
- Part No.:
- AIS2IHTR
- Manufacturer:
- STMicroelectronics
- Category:
- Accelerometers
- Package:
- 12-VFLGA
- Datasheet:
-
AIS2IHTR.pdf
- Description:
- MEMS DIGITAL OUTPUT MOTION SENSO
- Quantity:
- Payment:
- Shipping:
Inventory:12,291
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AIS2IHTR from STMicroelectronics is an AEC-Q100 qualified ultra-low-power 3-axis MEMS accelerometer with dynamically selectable full scales (±2g/±4g/±8g/±16g), 14-bit resolution, 1.6 Hz–1600 Hz output data rate, and integrated 32-level FIFO-designed for automotive telematics, in-dash navigation, and motion-activated power management systems.
For engineers reviewing the AIS2IHTR datasheet, AIS2IHTR pinout, AIS2IHTR application, or AIS2IHTR equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, automotive-grade operating modes, and confirmed alternative parts for non-safety-critical vehicle subsystems.
Technical Context
The AIS2IHTR implements a dual-mode architecture: High-Performance Mode (90 µg/√Hz noise, 110–140 µA @ 3 V) and four Low-Power Modes (0.67–14 µA @ 1.6–100 Hz), each configurable via CTRL1 and CTRL6 registers. Its internal motion engine supports free-fall, wakeup, 6D/4D orientation, and programmable single/double-tap detection using dedicated threshold and duration registers (30h–35h).
It features independent VDD (1.62–3.6 V) and Vdd_IO supplies, embedded temperature sensor (±15 °C offset, 16 LSB/°C), self-test capability (70–1500 mg response), and dual I²C (up to 3.4 MHz) / SPI (10 MHz) interfaces with hardware interrupt pins (INT1/INT2) supporting DRDY, FIFO flags, and on-demand clock-triggered conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full Scale Range | ±2g/±4g/±8g/±16g - user-selectable per application; ±2g enables highest resolution (0.244 mg/digit) in HP mode |
| Noise Density | 90 µg/√Hz - enables sub-degree tilt measurement accuracy in high-performance mode at 200 Hz ODR |
| Current Consumption | 0.67 µA @ 1.6 Hz LP Mode 4 - allows battery-powered automotive logging for >10 years on coin cell |
| Output Data Rate | 1.6 Hz to 1600 Hz - supports both low-power event monitoring and high-bandwidth crash pulse capture |
| FIFO Depth | 32-level - reduces host MCU polling frequency and enables burst-read efficiency in telematics buffer scenarios |
| Operating Temp | −40 °C to +115 °C - qualified for under-hood and dashboard mounting without external thermal compensation |
| Shock Survivability | 10000 g / 0.2 ms - withstands solder reflow, mechanical assembly shock, and vehicle crash transients |
Pinout & Package
LGA-12 package (2 mm × 2 mm × 0.93 mm), land grid array with exposed pad (no thermal via requirement), RoHS-compliant ECOPACK2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCL/SPC | I²C clock / SPI clock | Shared bidirectional clock line; supports I²C fast mode+ (1 MHz) and SPI up to 10 MHz |
| 2 CS | SPI enable / I²C mode select | Pulled up internally; logic high = I²C enabled, logic low = SPI active; no external pull required |
| 3 SDO/SA0 | SPI output / I²C address LSB | Configures I²C slave address (0x18 or 0x19); outputs acceleration data in SPI read sequences |
| 4 SDA/SDI/SDO | I²C data / SPI input / 3-wire output | Tri-state bidirectional bus pin; supports standard I²C, 4-wire SPI, and 3-wire SPI configurations |
| 5 NC | No connect | Internally unconnected; may be tied to VDD, Vdd_IO, or GND per PCB layout convenience |
| 6 & 8 GND | Analog/digital ground | Dual GND pins reduce ground bounce; require low-impedance connection to PCB ground plane |
| 7 RES | Reset input | Active-low reset; must be tied to GND for normal operation; not used as functional reset in automotive deployment |
| 9 VDD | Main supply (1.62–3.6 V) | Powers MEMS sensing element and analog front-end; decoupling capacitor mandatory (100 nF near pin) |
| 10 Vdd_IO | I/O supply (1.62–VDD+0.1 V) | Independent voltage domain enables level-shifting between 1.8 V MCU and 3.3 V system rails |
| 11 INT2 | Programmable interrupt / clock input | Configurable as DRDY/FIFO flag output or external clock input for on-demand conversion triggering |
| 12 INT1 | Programmable interrupt | Primary interrupt output for tap, wakeup, activity/inactivity, and FIFO watermark events |
Key Features
| Feature | Design Value |
|---|---|
| Embedded motion engine | Hardware-accelerated 6D/4D orientation, free-fall, and configurable single/double-tap detection-offloads host MCU processing |
| Single data conversion on demand | Triggered by INT2 clock or SPI/I²C command; enables precise timing control and <1.2 ms wake-up latency in LP Mode 1 |
| Independent VDD and Vdd_IO | Allows separation of sensor core (1.8 V) and digital interface (3.3 V), simplifying mixed-voltage automotive board design |
| Self-test with quantified response | Electrostatic actuation yields 70–1500 mg output shift-verifiable in-system without mechanical stimulus or calibration equipment |
| Temperature sensor | Integrated 8-/12-bit sensor (±15 °C offset, 16 LSB/°C) enables on-chip thermal drift compensation in navigation algorithms |
Applications
| Telematics & Black Boxes | In-Dash Car Navigation |
|---|---|
Use Scenario: Real-time vehicle dynamics logging during emergency braking, cornering, or collision events. IC Role / Device Role / Timing Role: Primary 3-axis acceleration sensor feeding CAN/Ethernet gateway with timestamped ODR-adjusted data bursts. Use Value: 10000 g shock survivability ensures post-crash data integrity; 32-level FIFO prevents data loss during host interrupt latency. |
Use Scenario: Tilt-compensated electronic compass and dead-reckoning support when GPS signal is lost in tunnels or urban canyons. IC Role / Device Role / Timing Role: High-resolution tilt measurement source (±2g, 90 µg/√Hz) synchronized with magnetometer via shared I²C bus. Use Value: Sub-degree inclination accuracy enables <5 m position drift/hour in GPS-denied environments. |
| Anti-Theft Devices | Smart Power Saving |
Use Scenario: Detecting unauthorized vehicle movement or tampering during parked state. IC Role / Device Role / Timing Role: Always-on motion detector operating in Low-Power Mode 4 (0.67 µA @ 1.6 Hz) with wakeup interrupt to MCU. Use Value: Enables >5-year battery life in standalone immobilizer modules; activity/inactivity engine eliminates false triggers from wind/vibration. |
Use Scenario: Dynamic power scaling of infotainment display backlight and audio amplifiers based on driver motion cues. IC Role / Device Role / Timing Role: Motion-triggered enable signal generator using programmable tap and activity thresholds. Use Value: Reduces standby current by >80% in dashcam and HUD systems without compromising responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis automotive accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDK IAM-20380TR | Wider ODR range (12.5 Hz–6.6 kHz), but higher noise floor (150 µg/√Hz) and no AEC-Q100 qualification | Targeted at consumer drones and robotics-not certified for automotive ECU placement | Select only for non-automotive industrial motion sensing where higher bandwidth outweighs qualification needs |
| Analog Devices ADXL313WBRMZ-RL | AEC-Q100 qualified, but fixed ±2g scale, no FIFO, and higher 350 µA HP mode current vs. AIS2IHTR's 140 µA | Used in airbag controllers requiring deterministic latency-not optimized for telematics buffering or low-power logging | Prefer for safety-critical deployments needing guaranteed interrupt-to-read latency; avoid for battery-constrained black boxes |
Compared with IAM-20380TR and ADXL313WBRMZ-RL, the AIS2IHTR uniquely balances AEC-Q100 compliance, ultra-low-power operation (0.67 µA), integrated FIFO, and programmable motion detection-making it optimal for non-safety automotive subsystems requiring long-life autonomy and intelligent event handling.
Availability
AIS2IHTR is available at Aetrix Electronics and suitable for telematics systems, in-dash navigation units, anti-theft modules, and smart power-saving subsystems requiring stable component supply across automotive production lifecycles.
Supply support for AIS2IHTR 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, delivering microcontrollers, sensors, power ICs, and automotive-grade solutions to over 100,000 customers worldwide.
The AIS2IHTR belongs to ST's automotive-qualified MEMS motion sensor portfolio, engineered specifically for non-safety vehicle applications-including telematics, infotainment, and body electronics-where extended temperature operation and ultra-low power are critical.
FAQ
What is the minimum supply voltage required for reliable operation of the AIS2IHTR?
The AIS2IHTR operates reliably from 1.62 V to 3.6 V on VDD and 1.62 V to (VDD + 0.1 V) on Vdd_IO. Below 1.62 V, internal regulators fail to stabilize, causing erratic register reads and FIFO corruption. Testing confirms stable 14-bit output and self-test functionality down to 1.62 V at −40 °C, per DS12421 Rev 4 Section 2.2.
Can the AIS2IHTR be used in safety-critical systems like airbag deployment?
No. The AIS2IHTR is AEC-Q100 Grade 2 qualified (−40 °C to +105 °C ambient) but explicitly designed for non-safety applications per ST's product summary. It lacks ASIL-B certification, diagnostic coverage reporting, and redundant signal paths required for airbag controllers-use ADXL313WBRMZ-RL or similar ASIL-certified alternatives instead.
How does the self-test function verify sensor integrity in-field?
The self-test applies electrostatic force to the MEMS proof mass, generating a DC output shift of 70–1500 mg depending on full-scale setting. Engineers read the raw output registers before and after activation; a shift within that range-verified against sensitivity (e.g., 0.244 mg/digit at ±2g)-confirms mechanical and signal-chain integrity without physical stimulus.
Is the LGA-12 package compatible with standard reflow profiles for automotive PCBs?
Yes. The AIS2IHTR's LGA-12 package (2 × 2 × 0.93 mm) is qualified for lead-free reflow per J-STD-020D, with peak temperature tolerance up to 260 °C for 30 seconds. ST recommends a ramp-to-spike profile with 60–120 sec above 217 °C; no underfill or special stencil design is required for automotive-grade reliability.
AIS2IHTR 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):
- 4098 (±2g) ~ 128 (±16g)
- Sensitivity (mV/g):
- -
- Bandwidth:
- 0.8Hz ~ 800Hz
- Output Type:
- I2C, SPI
- Voltage - Supply:
- 1.62V ~ 3.6V
- Features:
- Adjustable Bandwidth, Selectable Scale
- Operating Temperature:
- -40°C ~ 115°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LGA (2x2)
AIS2IHTR FAQ
1.How can I place an order for AIS2IHTR through Aetrix?
Please submit a Request for Quotation (RFQ) for AIS2IHTR 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 AIS2IHTR reliable?
The price and inventory of AIS2IHTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AIS2IHTR is usually 5 days.
3.What payment methods are accepted for AIS2IHTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AIS2IHTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AIS2IHTR?
AIS2IHTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AIS2IHTR 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 AIS2IHTR?
For technical support, including AIS2IHTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AIS2IHTR requirements.
6.How does Aetrix verify that AIS2IHTR is sourced from the original manufacturer or authorized distributors?
All AIS2IHTR 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 AIS2IHTR meets industry standards.
7.What is the process for return or replacement of AIS2IHTR?
All AIS2IHTR units undergo pre-shipment inspection (PSI). If there is an issue with AIS2IHTR, 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 AIS2IHTR part is unused and in its original packaging.
Return procedure for AIS2IHTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AIS2IHTR Tags
-
MXC4005XC
Memsic Inc.
-
MC3419
Memsic Inc.
-
MC3479
Memsic Inc.
-
MXC6655XA
Memsic Inc.
-
MC3630
Memsic Inc.
.jpg)
-
LIS2HH12TR
STMicroelectronics
-
KX122-1037
Kionix Inc.
-
LIS2DE12TR
STMicroelectronics
-
LIS2DH12TR
STMicroelectronics
-
MC3635
Memsic Inc.
-
LIS2DS12TR
STMicroelectronics
-
LIS3DHTR
STMicroelectronics
Tech Hub
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
