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STMicroelectronics LIS332AX
- Part No.:
- LIS332AX
- Manufacturer:
- STMicroelectronics
- Category:
- Accelerometers
- Package:
- 16-VFLGA
- Datasheet:
-
LIS332AX.pdf
- Description:
- ACCELEROMETER 2G ANALOG 16LGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,038
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Product details
Overview
LIS332AX from STMicroelectronics is a 3-axis ±2 g analog-output MEMS accelerometer in LGA-16 (3×3×1.0 mm) package, delivering factory-trimmed absolute zero-g level (1.25 V) and sensitivity (0.363 V/g), with 2.0 kHz sensing bandwidth and embedded self-test. It operates from 2.16–3.6 V, draws 300 µA in active mode, and supports tilt sensing, free-fall detection, and motion tracking in space-constrained portable electronics.
For engineers reviewing the LIS332AX datasheet, LIS332AX pinout, LIS332AX application, or LIS332AX equivalent, key selection criteria include analog output impedance (32 kΩ), temperature-stable zero-g drift (±0.2 mg/°C), self-test voltage change (40–550 mV per axis), and external RC filter compatibility for anti-aliasing down to 1 Hz.
Technical Context
The LIS332AX integrates a surface-micromachined silicon sensing element with a fully differential CMOS interface featuring correlated double sampling (CDS) to suppress 1/f noise and offset. Its analog outputs (VoutX/Y/Z) are absolute to Vdd-sensitivity and zero-g level remain invariant across supply voltage variation, enabling direct interfacing with fixed-reference ADCs.
Factory calibration stores trimming values for sensitivity and zero-g level in non-volatile memory, auto-loaded at power-on. The device implements electrostatic self-test by actuating the proof mass, producing measurable DC-level shifts on each output channel-verifying both mechanical integrity and signal chain functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-scale range | ±2 g - supports precise low-g motion detection for tilt and orientation without clipping under typical handheld/device accelerations. |
| Sensitivity | 0.363 V/g (±5%) - enables direct voltage-to-acceleration conversion with <1% full-scale error after factory trim. |
| Zero-g level | 1.25 V (±3.5%) - absolute reference point at 0 g; stable over temperature (±0.2 mg/°C drift) for reliable DC-coupled measurements. |
| Bandwidth | 2.0 kHz resonant frequency - maximum usable signal bandwidth; configurable down to 1 Hz via external 2.5–5 µF capacitors on each output. |
| Output impedance | 32 kΩ - forms RC low-pass filter with external capacitor; requires high-Z ADC input to avoid loading-induced gain error. |
| Power consumption | 300 µA active / 1 µA power-down - enables battery-operated devices to sustain >1-year operation in periodic wake-up sensing modes. |
| Shock survivability | 10,000 g (0.1 ms) - survives board-level reflow, drop testing, and mechanical handling without functional degradation. |
Pinout & Package
LGA-16 (3×3×1.0 mm) land grid array package with exposed die pad; RoHS-compliant ECOPACK® construction; solder-reflow compatible per JEDEC J-STD-020C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 7, 8, 10, 12, 14 | NC | Internally not connected - must be left floating or tied to GND per layout best practice; no electrical function. |
| 2, 15 | res | Internal resistor connection - externally tied to Vdd to enable internal bias network; required for proper IC interface operation. |
| 4 | ST | Self-test control - logic high (≥0.8×Vdd) activates electrostatic actuation; output voltage shift confirms sensor + interface health. |
| 5 | PD | Power-down control - logic high places device in ultra-low-current state (1 µA); exit time depends on external CLOAD (160×CLOAD+0.3 ms). |
| 6 | GND | Analog/digital ground reference - common return for supply, outputs, and control signals; critical for noise immunity. |
| 9, 11, 13 | VoutZ / VoutY / VoutX | Analog outputs - single-ended DC-coupled voltages proportional to acceleration on Z/Y/X axes; each has 32 kΩ source impedance. |
| 16 | Vdd | Supply input - accepts 2.16–3.6 V; powers both MEMS element and signal conditioning IC; decoupling (100 nF + 10 µF) mandatory. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed sensitivity & zero-g level | Eliminates system-level calibration; stored in non-volatile memory and auto-applied at startup for plug-and-play accuracy. |
| Embedded self-test (ST) | Verifies mechanical response and analog signal path integrity without external test equipment-critical for safety-critical or field-deployed systems. |
| Supply-voltage-invariant output | Sensitivity and offset scale absolutely with Vdd; allows use with fixed-reference ADCs independent of supply rail fluctuations. |
| Low-power active mode | 300 µA typical current enables multi-month battery life in wearable or IoT edge nodes performing periodic motion sampling. |
| High shock survivability | 10,000 g rating ensures reliability during PCB assembly, drop events, and harsh industrial handling-no post-mount recalibration needed. |
Applications
| Tilt Sensing | Free-Fall Detection |
|---|---|
|
Use Scenario: Smartphone or tablet detects orientation change (portrait ↔ landscape) for UI rotation. IC Role / Device Role / Timing Role: Analog-output 3-axis accelerometer providing real-time DC-coupled acceleration vector for gravity-referenced angle calculation. Use Value: Factory-trimmed zero-g level (1.25 V) and ±0.5% FS nonlinearity ensure sub-degree tilt resolution without runtime calibration. |
Use Scenario: Laptop triggers hard-disk head parking when sudden vertical acceleration indicates imminent drop. IC Role / Device Role / Timing Role: Low-latency analog sensor feeding comparator or microcontroller ADC to detect <−1.5 g sustained for ≥10 ms. Use Value: 2.0 kHz bandwidth and 100 µg/√Hz noise density enable robust free-fall signature discrimination from vibration or user motion. |
| Gaming Motion Control | Anti-Theft Tilt Alert |
|
Use Scenario: Handheld game controller interprets wrist flick or swing as in-game action (e.g., sword swing, steering). IC Role / Device Role / Timing Role: High-bandwidth analog interface delivering responsive X/Y/Z acceleration data to MCU for real-time gesture recognition. Use Value: Self-test capability validates sensor health before gameplay; ±2 g range captures aggressive user motion without saturation. |
Use Scenario: Asset tracker in shipping container triggers alarm if tilted beyond threshold during unauthorized movement. IC Role / Device Role / Timing Role: Always-on low-power accelerometer monitoring static orientation; wakes host only on angular deviation exceeding preset limit. Use Value: 1 µA power-down mode extends battery life to years; absolute zero-g level ensures consistent threshold triggering across temperature (-40°C to +85°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis analog-output accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL335 | Wider supply range (1.8–3.6 V), higher noise (300 µg/√Hz), no embedded self-test, same ±3 g default range (configurable to ±2 g via external resistors). | Lacks factory zero-g/sensitivity trim - requires system-level calibration; less suitable for cost-sensitive, uncalibrated end products. | Choose ADXL335 only if broader supply flexibility or legacy design reuse outweighs need for guaranteed initial accuracy and self-test. |
| LIS344ALH | Digital I²C/SPI output, lower power (6 µA in LP mode), ±2 g range, integrated FIFO, but no analog outputs or absolute zero-g reference. | Requires host MCU with digital interface and firmware for data parsing; unsuitable for direct ADC or analog comparator circuits. | Select LIS344ALH when digital integration, low-power duty cycling, or on-chip features (FIFO, interrupt generation) are prioritized over analog simplicity. |
Compared with ADXL335 and LIS344ALH, the LIS332AX uniquely delivers factory-calibrated analog outputs with supply-invariant scaling and embedded self-test-enabling immediate deployment in analog-signal-path systems where calibration overhead and validation rigor are critical.
Availability
LIS332AX is available at Aetrix Electronics and suitable for tilt sensing, free-fall detection, and gaming motion control requiring stable component supply, long-lifecycle support, and guaranteed MEMS performance consistency.
Supply support for LIS332AX 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 microcontrollers, sensors, power ICs, and automotive electronics with emphasis on reliability and industrial-grade robustness.
The LIS332AX belongs to ST's legacy analog-output MEMS accelerometer family, engineered for cost-sensitive, space-constrained consumer and industrial motion-sensing applications demanding plug-and-play analog accuracy and proven field reliability.
FAQ
What is the minimum external capacitor required for LIS332AX output filtering?
The LIS332AX requires a minimum load capacitance of 2.5 nF on each analog output (VoutX/Y/Z) to ensure stable operation and prevent oscillation. This value sets the lower bound for the RC low-pass filter formed with the internal 32 kΩ output impedance; smaller capacitors may cause phase margin loss or measurement inaccuracy due to insufficient filtering.
How does the LIS332AX self-test function verify sensor integrity?
The self-test applies an electrostatic force to the MEMS proof mass via the ST pin, inducing a known mechanical displacement. This produces a measurable DC voltage shift (40–550 mV) on the corresponding output channel-confirming both mechanical mobility of the sensing element and correct amplification/conditioning in the analog signal chain without external stimulus.
Can LIS332AX operate from a 1.8 V supply?
No. The LIS332AX specifies a minimum supply voltage of 2.16 V and is factory calibrated at 3.0 V. Operation below 2.16 V risks undefined behavior, degraded sensitivity, or failure to power up. For 1.8 V systems, consider ST's digital-output LIS3DH or Analog Devices' ADXL345, which support lower supply rails.
Why does LIS332AX use two res pins (pins 2 and 15)?
Pins 2 and 15 connect internally to the same bias resistor node. Using both improves current distribution and reduces parasitic resistance in the bias path, ensuring stable internal reference generation across temperature and process variation-critical for maintaining factory-trimmed zero-g level and sensitivity accuracy.
LIS332AX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-VFLGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Analog
- Axis:
- X, Y, Z
- Acceleration Range:
- ±2g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 363
- Bandwidth:
- 2kHz
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 2.16V ~ 3.6V
- Features:
- Adjustable Bandwidth
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LGA (3x3)
LIS332AX FAQ
1.How can I place an order for LIS332AX through Aetrix?
Please submit a Request for Quotation (RFQ) for LIS332AX 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 LIS332AX reliable?
The price and inventory of LIS332AX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LIS332AX is usually 5 days.
3.What payment methods are accepted for LIS332AX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LIS332AX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LIS332AX?
LIS332AX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LIS332AX 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 LIS332AX?
For technical support, including LIS332AX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LIS332AX requirements.
6.How does Aetrix verify that LIS332AX is sourced from the original manufacturer or authorized distributors?
All LIS332AX 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 LIS332AX meets industry standards.
7.What is the process for return or replacement of LIS332AX?
All LIS332AX units undergo pre-shipment inspection (PSI). If there is an issue with LIS332AX, 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 LIS332AX part is unused and in its original packaging.
Return procedure for LIS332AX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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