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STMicroelectronics LIS302ALBTR
- Part No.:
- LIS302ALBTR
- Manufacturer:
- STMicroelectronics
- Category:
- Accelerometers
- Package:
- 14-VFLGA
- Datasheet:
-
LIS302ALBTR.pdf
- Description:
- ACCELEROMETER 2G ANALOG 14LGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,973
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Product details
Overview
LIS302ALBTR from STMicroelectronics is a miniaturized 3-axis analog-output MEMS accelerometer with ±2g full-scale range, ratiometric voltage outputs (Voutx/Vouty/Voutz), embedded multiplexer for single-channel ADC interfacing, and self-test capability. It operates from 3.0–3.6V, consumes ~0.65mA in active mode, and delivers 2kHz bandwidth with 200μg/√Hz noise density - used in mobile terminal motion sensing and free-fall data protection.
For engineers reviewing the LIS302ALBTR datasheet, LIS302ALBTR pinout, LIS302ALBTR application, or LIS302ALBTR equivalent, key selection considerations include its LGA-14 package footprint, ratiometric output scaling, multiplexed analog channel selection via S0/S1 logic, and factory-trimmed zero-g offset and sensitivity at 3.3V.
Technical Context
The LIS302ALBTR integrates a surface-micromachined capacitive sensing element with a fully differential CMOS interface featuring Correlated Double Sampling (CDS) to suppress 1/f noise and offset drift. Its analog outputs are ratiometric to Vdd, enabling supply-independent measurement accuracy across the 3.0–3.6V operating range.
It implements three independent sample-and-hold circuits per axis, plus a 2-bit digital multiplexer (S0/S1) to route Voutx/Vouty/Voutz or Aux_in to the shared Vout pin. Power-down mode reduces current to 1μA, and self-test applies electrostatic actuation to verify sensor integrity without mechanical movement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0–3.6V - supports direct connection to common 3.3V logic rails without regulation |
| Full-Scale Range | ±2g - optimized for human-motion detection and drop-sensing in portable devices |
| Output Type | Ratiometric analog voltage - Vout = (Vdd/2) ± (0.145×Vdd×g) - eliminates supply-induced gain error in ADC chains |
| Bandwidth | 2.0kHz maximum - configurable down to 1Hz via external RC filter on Voutx/y/z (Rout = 32kΩ) |
| Zero-g Offset | Vdd/2 ±6% - factory-trimmed and temperature-stable (±0.5mg/°C drift) |
| Self-Test Output ΔV | +95 to +200mV per axis - provides deterministic voltage shift for functional verification |
| Shock Survivability | 10,000g for 0.1ms - ensures robustness during board assembly and end-use mechanical stress |
Pinout & Package
Packaged in a 3×5×0.9mm Thin Land Grid Array (LGA-14) with exposed die pad, qualified for -40°C to +85°C operation and RoHS/ECOPACK® compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,14 | Reserved | Internally connected to Vdd - must be tied to power supply for mechanical stability |
| 3 (S0), 4 (S1) | MUX Address Inputs | 2-bit binary select for Vout pin routing: 00→X, 01→Y, 10→Z, 11→Aux_in |
| 5 (ST) | Self-Test Control | Logic high activates electrostatic test force; output shifts by ≥95mV for pass/fail validation |
| 6 (PD) | Power-Down Enable | Logic high reduces supply current from 0.65mA to 1μA - enables ultra-low-power wake-on-motion designs |
| 7–9 (Voutx, Vouty, Voutz) | Axis Analog Outputs | Independent ratiometric voltage outputs; each with 32kΩ source impedance for RC filtering |
| 10 (GND) | Ground Reference | 0V return path for analog and digital circuitry - requires low-impedance PCB plane |
| 11 (Vout) | Multiplexed Output | Shared analog output pin - routes selected axis or Aux_in based on S0/S1 state |
| 12 (Aux_in) | Auxiliary Input | External analog signal input - selectable via S0/S1=11 for system-level calibration or diagnostics |
| 13 (Vdd) | Power Supply | 3.0–3.6V analog/digital supply - requires local 100nF + 10μF decoupling per datasheet layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Embedded 2-bit MUX | Reduces ADC channel count requirement - enables 3-axis sensing using only one analog input |
| Factory-Trimmed Offset & Sensitivity | Eliminates need for system-level calibration - zero-g level and 0.145V/g gain stored in non-volatile memory |
| Ratiometric Output Architecture | Compensates for Vdd variation in ADC reference chain - maintains measurement accuracy without separate voltage reference |
| 10,000g Shock Survivability | Withstands reflow soldering thermal shock and end-product mechanical abuse - no post-assembly recalibration needed |
| Low-Power Active Mode | 0.65mA typical supply current - enables >1-year battery life in coin-cell-powered motion loggers |
Applications
| Mobile Terminal Tilt Detection | Gaming Motion Input |
|---|---|
|
Use Scenario: Detecting device orientation changes in smartphones and PDAs to auto-rotate UI elements. IC Role / Device Role / Timing Role: Primary 3-axis analog motion sensor providing real-time DC-coupled acceleration data for orientation estimation. Use Value: Ratiometric outputs ensure consistent tilt angle calculation across varying battery voltage (3.6V → 3.0V discharge). |
Use Scenario: Translating handheld controller tilt and shake into game character movement or camera control. IC Role / Device Role / Timing Role: Low-latency analog motion capture engine feeding into microcontroller ADC with <2ms group delay. Use Value: 2kHz bandwidth captures rapid gestures; self-test validates sensor health before gameplay session. |
| Free-Fall Data Protection | Appliance Vibration Monitoring |
|
Use Scenario: Triggering hard-disk head parking when laptop detects sudden vertical acceleration loss (drop event). IC Role / Device Role / Timing Role: Dedicated free-fall detector using Z-axis output threshold crossing with <10ms response time. Use Value: ±2g range and 200μg/√Hz noise density enable reliable drop detection while rejecting ambient vibration false triggers. |
Use Scenario: Monitoring washing machine drum imbalance or HVAC fan vibration to predict bearing failure. IC Role / Device Role / Timing Role: Always-on vibration transducer capturing low-frequency (<200Hz) mechanical resonance signatures. Use Value: External RC filtering (e.g., 25nF → 200Hz cutoff) tailors bandwidth to appliance-specific fault frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis analog-output MEMS accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LIS331DLHTR | Digital I²C/SPI output; ±2g/±4g/±8g selectable range; higher 10-bit resolution; no analog mux | Requires microcontroller with digital interface; better for multi-gesture classification but needs firmware parsing | Choose for systems needing programmable full-scale or digital bus integration instead of analog ADC simplicity |
| ADXL322BCPZ-RL7 | Analog output; ±2g range; 3.3V fixed supply; higher 500μg/√Hz noise; no self-test or mux | Lacks multiplexing and self-test - simpler BOM but requires 3 ADC channels and external validation | Choose when lowest cost per axis is critical and board space allows three dedicated analog inputs |
Compared with LIS331DLHTR and ADXL322BCPZ-RL7, the LIS302ALBTR uniquely combines analog simplicity, single-ADC compatibility via mux, and built-in self-test - making it optimal for cost-sensitive, space-constrained motion-triggered systems where analog signal chain integrity is prioritized over digital configurability.
Availability
LIS302ALBTR is available at Aetrix Electronics and suitable for mobile terminal tilt detection, gaming motion input, and free-fall data protection requiring stable component supply and long-term industrial availability.
Supply support for LIS302ALBTR 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 LIS302ALBTR belongs to ST's "piccolo" family of ultra-compact analog accelerometers - engineered specifically for battery-powered portable devices demanding minimal footprint, low quiescent current, and plug-and-play motion sensing without host-side calibration.
FAQ
What is the recommended decoupling for LIS302ALBTR?
Per ST's layout guidelines, use a 100nF ceramic capacitor and a 10μF aluminum electrolytic capacitor placed as close as possible to pins 13 (Vdd) and 10 (GND). This dual-capacitor network suppresses both high-frequency switching noise and low-frequency supply droop, ensuring stable analog output performance and minimizing offset drift during transient load conditions.
How does the ratiometric output improve ADC accuracy?
The LIS302ALBTR's output voltage scales linearly with Vdd (e.g., zero-g = Vdd/2, sensitivity = 0.145×Vdd V/g). When the same Vdd supplies both the accelerometer and the ADC reference, supply voltage variations cancel out - eliminating gain and offset errors that would otherwise require software compensation or precision external references.
Can the LIS302ALBTR operate below 3.0V?
No - the absolute minimum supply voltage is 3.0V per datasheet Table 3. Although the sensing element may function at lower voltages, the IC interface (including CDS amplifier and MUX) is not characterized or guaranteed below 3.0V. Operation below this threshold risks undefined behavior, increased noise, or failure to enter power-down mode reliably.
What is the purpose of the Aux_in pin?
Aux_in provides a secondary analog input channel selectable via S0/S1=11. It enables system-level diagnostics - such as injecting a known test voltage to validate ADC linearity or measuring internal reference stability - without adding external components, supporting functional safety checks in certified designs.
LIS302ALBTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 14-VFLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Analog
- Axis:
- X, Y, Z
- Acceleration Range:
- ±2g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 479
- Bandwidth:
- 2kHz
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 3V ~ 3.6V
- Features:
- Adjustable Bandwidth
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-LGA (3x5)
LIS302ALBTR FAQ
1.How can I place an order for LIS302ALBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for LIS302ALBTR 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 LIS302ALBTR reliable?
The price and inventory of LIS302ALBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LIS302ALBTR is usually 5 days.
3.What payment methods are accepted for LIS302ALBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LIS302ALBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LIS302ALBTR?
LIS302ALBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LIS302ALBTR 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 LIS302ALBTR?
For technical support, including LIS302ALBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LIS302ALBTR requirements.
6.How does Aetrix verify that LIS302ALBTR is sourced from the original manufacturer or authorized distributors?
All LIS302ALBTR 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 LIS302ALBTR meets industry standards.
7.What is the process for return or replacement of LIS302ALBTR?
All LIS302ALBTR units undergo pre-shipment inspection (PSI). If there is an issue with LIS302ALBTR, 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 LIS302ALBTR part is unused and in its original packaging.
Return procedure for LIS302ALBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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