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STMicroelectronics LY550ALH
- Part No.:
- LY550ALH
- Manufacturer:
- STMicroelectronics
- Category:
- Gyroscopes
- Package:
- 16-LFLGA
- Datasheet:
-
LY550ALH.pdf
- Description:
- GYROSCOPE SINGLE AXIS 16-LGA
- Quantity:
- Payment:
- Shipping:
Inventory:185
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Product details
Overview
LY550ALH from STMicroelectronics is a single-axis MEMS yaw-rate gyroscope delivering analog angular rate output with ±500 °/s full-scale range, 140 Hz bandwidth, and dual-output architecture (amplified 4xOUTZ and non-amplified OUTZ). It operates from 2.7–3.6 V over –40 °C to +85 °C and integrates self-test, power-down, and embedded low-pass filtering for motion-sensing applications in gaming controllers and robotics.
For engineers reviewing the LY550ALH datasheet, LY550ALH pinout, LY550ALH application, or LY550ALH equivalent, key selection considerations include its dual analog output configuration, temperature-stable zero-rate level (1.23 V), Coriolis-based sensing mechanism, and LGA-16 package compatibility with high-shock environments.
Technical Context
The LY550ALH implements a micromachined resonant structure with a continuously oscillating driving mass that responds to angular rotation via Coriolis force detection. Its CMOS interface IC conditions the signal and provides two independent analog outputs: one buffered and 4× amplified (4xOUTZ), the other direct (OUTZ) with 0.5 mV/°/s sensitivity.
It embeds a PLL-based phase generator for actuation/sensing synchronization, supports external high-pass filter reset via HP pin, and includes factory-trimmed reference voltage (Vref = 1.23 V) and zero-rate level stability (±0.08 °/s/°C drift). The device uses internal low-pass filtering (ft = 140 Hz) and requires external RC networks on FILTVDD and VCONT pins for PLL loop stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full Scale Range | ±500 °/s (4xOUTZ output); ±2000 °/s (OUTZ output) - defines measurable angular velocity limits before saturation |
| Sensitivity | 2 mV/°/s (4xOUTZ); 0.5 mV/°/s (OUTZ) - determines output voltage per unit angular rate |
| Bandwidth | 140 Hz (-3 dB) - maximum usable signal frequency without significant attenuation |
| Zero-Rate Level | 1.23 V (typical) - DC output voltage at zero rotation; stable across temperature (±0.08 °/s/°C drift) |
| Supply Voltage | 2.7–3.6 V - single-supply operation compatible with standard 3.3 V systems |
| Operating Temp | –40 °C to +85 °C - industrial-grade thermal range validated for embedded motion control |
| Power Consumption | 5.5 mA (active); 5 µA (power-down) - enables low-power mode for battery-operated devices |
Pinout & Package
LY550ALH is housed in a 5 mm × 5 mm × 1.5 mm plastic land grid array (LGA-16) package with exposed pad for thermal and mechanical robustness. The package supports automated optical alignment during placement and is qualified per JEDEC J-STD-020C for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | 0 V supply return for all analog and digital circuitry |
| 2 FILTVDD | PLL filter connection #2 | Connects external RC network to stabilize PLL loop dynamics |
| 3 VCONT | PLL filter connection #1 | Completes PLL low-pass filter with FILTVDD for phase synchronization |
| 7 Vref | Reference voltage source | Provides stable 1.23 V internal reference for ADC interfacing and biasing |
| 8 4xOUTZ | Amplified analog output | Buffered 4× gain output (2 mV/°/s) with low impedance for direct ADC drive |
| 9 4xINZ | 4x amplifier input | Internal node connecting OUTZ to 4× gain stage; short to OUTZ if amplification used |
| 10 OUTZ | Non-amplified analog output | Direct sensor output (0.5 mV/°/s); requires external amplification or buffering |
| 11 ST | Self-test control | Logic high activates electrostatic test force to verify mechanical integrity |
| 12 PD | Power-down control | Logic high reduces current draw to 5 µA; preserves calibration state |
| 13 HP | High-pass filter reset | Logic high resets external HP filter to clear DC offset during startup or overload |
| 14–15 Res | Reserved | Must be connected to Vdd per datasheet; not internally connected |
| 16 Vdd | Power supply | Primary 2.7–3.6 V supply input; decoupling required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual analog output paths | Simultaneous access to amplified (4xOUTZ) and raw (OUTZ) signals enables flexible signal chain design and redundancy |
| Embedded self-test | Electrostatic actuation verifies mechanical functionality without external stimulus - critical for safety-aware UI devices |
| Temperature-stable zero-rate level | Drift of only ±0.08 °/s/°C ensures minimal calibration burden in wide-temperature industrial deployments |
| Integrated PLL timing | On-chip phase-locked loop synchronizes drive and sense circuits, eliminating need for external clock sources |
| Shock survivability | Rated for 3000 g (0.5 ms) and 10,000 g (0.1 ms) shocks - suitable for handheld and robotic end-effectors |
Applications
| Gaming Controllers | Industrial Robotics |
|---|---|
Use Scenario: Motion-sensing remote controllers and gamepads requiring responsive tilt and rotation tracking. IC Role / Device Role / Timing Role: Yaw-axis angular rate sensor providing real-time analog output for gesture decoding and orientation estimation. Use Value: Dual-output architecture allows direct ADC sampling of 4xOUTZ (2 mV/°/s) for high-resolution motion capture without external gain stages. | Use Scenario: Joint angle monitoring and stabilization feedback in collaborative robot arms and mobile manipulators. IC Role / Device Role / Timing Role: Single-axis yaw-rate transducer feeding closed-loop motion control algorithms with 140 Hz bandwidth. Use Value: High shock survivability (3000 g) and extended temperature range (–40 °C to +85 °C) ensure reliable operation in factory-floor environments. |
| Pointing Devices | Motion-Controlled UI |
Use Scenario: Air mouse and presentation remotes needing precise pointer acceleration and direction tracking. IC Role / Device Role / Timing Role: Analog angular rate source for inertial navigation integration; outputs fed to microcontroller ADC. Use Value: Factory-trimmed 1.23 V zero-rate level minimizes software calibration overhead during device initialization. | Use Scenario: Gesture-driven kiosks and interactive displays interpreting rotational hand movements. IC Role / Device Role / Timing Role: Primary yaw-rate detector enabling intuitive 3D interaction via angular velocity thresholds and direction logic. Use Value: Embedded power-down (5 µA) and self-test support ultra-low-power wake-on-motion and field reliability verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-axis analog gyroscope applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXRS620 | Wider full-scale (±2500 °/s), higher noise floor (0.015 °/s/√Hz), no integrated self-test | Targeted at high-dynamic-range industrial stabilization; lacks built-in diagnostics | Select when extended range outweighs need for self-test and lower power |
| ENC-03R | Analog output only (no dual-path), no power-down or self-test, wider supply (4.5–6 V), larger SOIC-8 package | Legacy cost-sensitive motion projects; incompatible with low-voltage or space-constrained designs | Choose only for drop-in replacement in existing 5 V systems with no requirement for diagnostics or miniaturization |
Compared with ADXRS620 and ENC-03R, LY550ALH uniquely combines dual analog outputs, integrated self-test, 3.3 V operation, and LGA-16 miniaturization - making it optimal for next-generation portable motion interfaces where reliability, size, and power efficiency are co-prioritized.
Availability
LY550ALH is available at Aetrix Electronics and suitable for gaming controllers, industrial robotics, pointing devices, and motion-controlled UIs requiring stable component supply, consistent calibration, and long-term manufacturability.
Supply support for LY550ALH 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, specializing in MEMS sensors, microcontrollers, and power management ICs with over 20 years of automotive- and industrial-grade manufacturing heritage.
The LY550ALH belongs to ST's high-performance analog gyroscope product line, designed specifically for consumer and industrial motion-sensing applications demanding precision, robustness, and seamless integration into compact, low-power systems.
FAQ
What is the function of the HP pin on LY550ALH?
The HP (High Pass Filter Reset) pin resets an optional external high-pass filter by applying a logic high signal. This clears DC offset buildup during power-up or overload events, ensuring fast settling and accurate zero-rate recovery. It must be driven actively - floating or weak pull-down causes undefined behavior per datasheet Section 3.4.
Can LY550ALH operate from a 3.3 V supply?
Yes - LY550ALH is fully specified for 2.7 V to 3.6 V operation, with typical performance characterized at 3.0 V. At 3.3 V, supply current remains within 5.5 mA (active) and zero-rate level stays at 1.23 V, enabling direct use with standard 3.3 V microcontroller I/O and ADC references.
How does the self-test feature verify sensor integrity?
The self-test applies an electrostatic force to the micromachined driving mass via the ST pin, emulating a known Coriolis response. When activated, it produces a predictable DC-level shift in 4xOUTZ (e.g., ~1.0 V change at 3 V supply). Measuring this shift confirms both mechanical resonance and analog signal path functionality without external rotation.
Why are pins 4, 5, and 6 labeled "Res" and left unconnected?
Pins 4, 5, and 6 are reserved internal test or calibration nodes not intended for user connection. Leaving them unconnected prevents interference with factory-trimmed offsets and PLL tuning. Connecting them risks output instability or calibration corruption - the datasheet explicitly states "Leave unconnected" in Table 2.
LY550ALH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-LFLGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Analog
- Axis:
- X (Pitch)
- Range °/s:
- ±500
- Sensitivity (LSB/(°/s)):
- -
- Sensitivity (mV/°/s):
- 2
- Bandwidth:
- 140Hz
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 2.7V ~ 3.6V
- Current - Supply:
- 4.8 mA
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
LY550ALH FAQ
1.How can I place an order for LY550ALH through Aetrix?
Please submit a Request for Quotation (RFQ) for LY550ALH 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 LY550ALH reliable?
The price and inventory of LY550ALH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LY550ALH is usually 5 days.
3.What payment methods are accepted for LY550ALH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LY550ALH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LY550ALH?
LY550ALH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LY550ALH 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 LY550ALH?
For technical support, including LY550ALH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LY550ALH requirements.
6.How does Aetrix verify that LY550ALH is sourced from the original manufacturer or authorized distributors?
All LY550ALH 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 LY550ALH meets industry standards.
7.What is the process for return or replacement of LY550ALH?
All LY550ALH units undergo pre-shipment inspection (PSI). If there is an issue with LY550ALH, 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 LY550ALH part is unused and in its original packaging.
Return procedure for LY550ALH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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