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Analog Devices Inc. ADXRS642BBGZ-RL
- Part No.:
- ADXRS642BBGZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gyroscopes
- Package:
- 32-BFCBGA
- Datasheet:
-
ADXRS642BBGZ-RL.pdf
- Description:
- IC GYROSCOPE YAW RATE 32CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:504
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Product details
Overview
ADXRS642BBGZ-RL from Analog Devices is an industrial-grade, single-chip, z-axis (yaw rate) angular rate gyroscope with ±250°/s measurement range, 20°/hour bias stability, and 0.02°/√second angle random walk. It delivers vibration-rejecting performance in severe mechanical environments such as platform stabilization and inertial measurement units.
For engineers reviewing the ADXRS642BBGZ-RL datasheet, ADXRS642BBGZ-RL pinout, ADXRS642BBGZ-RL application, or ADXRS642BBGZ-RL equivalent, key selection criteria include its 10,000 g shock survivability, ratiometric 5 V operation, self-test capability via ST1/ST2 digital inputs, and integrated temperature sensor output for calibration.
Technical Context
The ADXRS642BBGZ-RL implements a resonator-based gyro architecture with four polysilicon sensing structures electrostatically driven at ~18 kHz. Its fully differential quad-sensor design rejects linear acceleration and broadband vibration by converting external g-forces into common-mode signals.
It uses on-chip charge pump circuitry (requiring CP1–CP5 capacitors) to generate the 18–20 V needed for electrostatic resonance from a 5 V supply. The RATEOUT voltage is ratiometric to VRATIO, enabling supply-noise rejection when paired with a ratiometric ADC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Measurement Range | ±250°/s minimum full-scale range; supports ±300°/s over temperature with guaranteed specs. |
| Sensitivity | 7.0 mV/°/sec (−40°C to +105°C); ratiometric to VRATIO, enabling stable scaling across supply variation. |
| Bias Stability | 20°/hour; enables high-accuracy long-duration angular integration without frequent null recalibration. |
| Angle Random Walk | 0.02°/√second; defines low-frequency noise floor critical for precision inertial navigation. |
| Vibration Rectification | 0.0002°/s/g² (25 g rms, 50 Hz–5 kHz); quantifies minimal DC error induced by mechanical vibration. |
| Bandwidth | User-adjustable up to 2000 Hz via external COUT; supports real-time control loops requiring fast response. |
| Shock Survivability | 10,000 g powered and unpowered; ensures operational integrity during drop events or explosive transients. |
| Operating Temperature | −40°C to +105°C; qualified for industrial and under-hood automotive environments. |
Pinout & Package
The ADXRS642BBGZ-RL is housed in a 32-ball ceramic BGA (BG-32-3), measuring 6.85 mm × 6.85 mm × 3.8 mm, with solder balls arranged in a 7×7 grid (corner balls omitted). It requires no external oscillator and integrates all signal conditioning, charge pump, and self-test logic on-die.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1B, 2A | RATEOUT | Main analog output: voltage proportional to yaw rate; ratiometric to VRATIO; drives up to 200 µA or 1000 pF. |
| 1C, 2C | SUMJ | Summing junction for null adjustment; injection current here offsets RATEOUT baseline without affecting gain. |
| 1E, 2E | VRATIO | Reference supply input; sets scale for RATEOUT, TEMP, ST1, ST2; must be ≤ AVCC. |
| 1F, 2G | AGND | Analog ground return; separate from PGND to isolate charge pump noise from signal path. |
| 3F, 3G | TEMP | Temperature sensor output: ~2.5 V at 25°C, ~9 mV/°C scale factor; used for in-system thermal compensation. |
| 4F, 4G | ST2 | Digital self-test input; logic high injects +45°/sec equivalent signal into RATEOUT. |
| 5F, 5G | ST1 | Digital self-test input; logic high injects −45°/sec equivalent signal into RATEOUT; ±2% match with ST2. |
| 6D, 7D | CP5 | HV filter capacitor terminal; connects to 100 nF capacitor for charge pump stabilization. |
| 6A–7C, 5A–4B | CP1–CP4 | Charge pump capacitor terminals; four 22 nF caps required unless external 18–20 V supply is used. |
| 1D, 2D | NC | No connection; must remain unconnected per datasheet; floating or tied pins risk parametric shift. |
| 6G, 7F | PGND | Charge pump ground return; isolated from AGND to prevent switching noise coupling into analog output. |
| 6E, 7E | VDD | Positive charge pump supply; accepts 4.75–5.25 V; powers internal HV generation circuitry. |
| 3A, 3B | AVCC | Analog supply input; powers core sensor and signal chain; must be same voltage as VDD. |
Key Features
| Feature | Design Value |
|---|---|
| Z-axis (yaw) angular rate sensing | Single-axis measurement aligned normal to package top; optimized for rotational motion about vertical axis in stabilization systems. |
| Quad-sensor vibration rejection | Mechanical coupling of four resonant structures converts vibration into common-mode signals, rejected by differential readout architecture. |
| Digital self-test with dual inputs | ST1 and ST2 independently inject calibrated −45°/sec and +45°/sec responses, enabling functional verification without physical rotation. |
| Integrated temperature sensor | Output at 3F/3G provides real-time die temperature data (~9 mV/°C) for software-based bias and sensitivity compensation. |
| Ratiometric output architecture | RATEOUT, TEMP, ST1, ST2 all scale with VRATIO; eliminates gain error from supply drift when used with ratiometric ADCs. |
| On-chip charge pump | Generates 18–20 V internally from 5 V supply; eliminates need for external HV source while maintaining resonator performance. |
Applications
| Platform Stabilization | Inertial Measurement Units (IMUs) |
|---|---|
Use Scenario: Active stabilization of antenna mounts, camera gimbals, or robotic arms subjected to vehicle motion or wind gusts. IC Role / Device Role / Timing Role: Yaw rate feedback sensor providing real-time angular velocity to closed-loop servo controllers. Use Value: 20°/hour bias stability and 0.02°/√second angle random walk enable sub-degree pointing accuracy over minutes without recalibration. | Use Scenario: Core angular rate element in 6-DOF IMUs for industrial navigation, surveying equipment, or autonomous mobile robots. IC Role / Device Role / Timing Role: Z-axis gyroscope delivering vibration-immune yaw data synchronized with accelerometer and magnetometer outputs. Use Value: 0.0002°/s/g² vibration rectification ensures minimal heading drift during operation on vibrating machinery or rough terrain. |
| Severe Mechanical Environments | Industrial Automation Feedback |
Use Scenario: Rate sensing in downhole drilling tools, construction equipment, or rail-mounted inspection systems exposed to shock and broadband vibration. IC Role / Device Role / Timing Role: Primary angular rate transducer operating continuously under 10,000 g shock loads and 25 g rms random vibration. Use Value: 10,000 g powered shock survivability and ceramic BGA packaging ensure uninterrupted operation where silicon MEMS devices typically fail. | Use Scenario: Motion feedback in CNC machine tool rotary tables, robotic joint controllers, or conveyor alignment systems requiring precise angular velocity monitoring. IC Role / Device Role / Timing Role: High-stability yaw sensor feeding real-time rate data to motion control ASICs or FPGA-based servo loops. Use Value: Ratiometric 5 V operation and −40°C to +105°C rating support reliable deployment in factory-floor enclosures with wide ambient swings and EMI exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar yaw rate sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXRS622BBGZ-RL | Same 32-ball CBGA package, −40°C to +105°C rating, and pinout; but lower vibration rejection and no enhanced noise floor specification. | Lacks ADXRS642BBGZ-RL's improved vibration rectification (0.0002°/s/g² vs. unspecified) and angle random walk (0.02°/√s vs. 0.03°/√s typical). | Select ADXRS622BBGZ-RL only if cost sensitivity outweighs requirement for highest vibration immunity and lowest noise in harsh environments. |
| ADXRS652BBGZ-RL | Identical pinout, package, and temperature range; shares same enhanced vibration rejection and self-test architecture as ADXRS642BBGZ-RL. | Offers ±500°/s range (vs. ±250°/s), higher bandwidth (up to 3000 Hz), and improved bias instability (15°/hour vs. 20°/hour). | Choose ADXRS652BBGZ-RL when wider dynamic range or tighter bias stability is required; otherwise ADXRS642BBGZ-RL provides optimal balance for ±250°/s applications. |
Compared with ADXRS622BBGZ-RL, the ADXRS642BBGZ-RL delivers measurably lower vibration-induced error and better long-term bias stability-critical for precision stabilization. Against ADXRS652BBGZ-RL, it trades extended range and marginally better bias for identical footprint and lower power consumption in standard ±250°/s use cases.
Availability
ADXRS642BBGZ-RL is available at Aetrix Electronics and suitable for platform stabilization, inertial measurement units, severe mechanical environments, and industrial automation feedback requiring stable component supply across extended temperature ranges and high-reliability operation.
Supply support for ADXRS642BBGZ-RL 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
Analog Devices, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision sensing, signal conditioning, and power management.
The ADXRS642 product line delivers industrial-grade MEMS gyroscopes designed specifically for high-vibration, high-shock applications where traditional gyros fail-enabling robust inertial sensing in downhole, aerospace, and heavy machinery systems.
FAQ
What is the primary sensing axis of the ADXRS642BBGZ-RL?
The ADXRS642BBGZ-RL is a z-axis (yaw rate) gyroscope: its sensitive axis is perpendicular to the top surface of the package. Clockwise rotation about this axis produces a positive voltage at RATEOUT (pins 1B/2A). This orientation makes it ideal for heading-rate measurement in rotating platforms and stabilization systems where vertical-axis motion dominates.
Does the ADXRS642BBGZ-RL require external high-voltage components?
No-the ADXRS642BBGZ-RL integrates an on-chip charge pump that generates the 18–20 V required for its resonant polysilicon structure from a standard 5 V supply. Four 22 nF capacitors (CP1–CP4) and one 100 nF capacitor (CP5) are required externally for charge pump stability, but no external HV source is needed unless bypassing the pump entirely.
How does the self-test function work on the ADXRS642BBGZ-RL?
The ADXRS642BBGZ-RL features two independent digital self-test inputs: ST1 (pins 5F/5G) and ST2 (pins 4F/4G). Applying logic high to ST1 injects a −45°/sec equivalent signal at RATEOUT; ST2 injects +45°/sec. Their ±2% mismatch is characterized and usable for diagnostic validation without mechanical stimulus-ensuring sensor and signal chain integrity before deployment.
Can the ADXRS642BBGZ-RL operate without the VRATIO pin connected?
No-VRATIO (pins 1E/2E) must be connected to a stable reference voltage (≤ AVCC) because RATEOUT, TEMP, ST1, and ST2 are all ratiometric to it. Omitting VRATIO causes undefined scaling, loss of supply-noise rejection, and invalid output calibration. The datasheet specifies VRATIO = AVCC = 5 V for nominal operation and full-range output swing.
What is the purpose of the SUMJ pin on the ADXRS642BBGZ-RL?
SUMJ (pins 1C/2C) is the summing junction node for the output amplifier. It allows analog null adjustment by injecting current-shifting the RATEOUT baseline without altering sensitivity. This enables asymmetric output swing optimization in systems with unipolar ADCs or constrained voltage rails, and is distinct from digital offset trimming which is not supported on the ADXRS642BBGZ-RL.
ADXRS642BBGZ-RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-BFCBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Analog
- Axis:
- Z (Yaw)
- Range °/s:
- ±250
- Sensitivity (LSB/(°/s)):
- -
- Sensitivity (mV/°/s):
- 7
- Bandwidth:
- 2kHz
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 4.75V ~ 5.25V
- Current - Supply:
- 3.5 mA
- Features:
- Adjustable Bandwidth, Temperature Sensor
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
ADXRS642BBGZ-RL FAQ
1.How can I place an order for ADXRS642BBGZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADXRS642BBGZ-RL 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 ADXRS642BBGZ-RL reliable?
The price and inventory of ADXRS642BBGZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADXRS642BBGZ-RL is usually 5 days.
3.What payment methods are accepted for ADXRS642BBGZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADXRS642BBGZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADXRS642BBGZ-RL?
ADXRS642BBGZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADXRS642BBGZ-RL 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 ADXRS642BBGZ-RL?
For technical support, including ADXRS642BBGZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADXRS642BBGZ-RL requirements.
6.How does Aetrix verify that ADXRS642BBGZ-RL is sourced from the original manufacturer or authorized distributors?
All ADXRS642BBGZ-RL 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 ADXRS642BBGZ-RL meets industry standards.
7.What is the process for return or replacement of ADXRS642BBGZ-RL?
All ADXRS642BBGZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADXRS642BBGZ-RL, 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 ADXRS642BBGZ-RL part is unused and in its original packaging.
Return procedure for ADXRS642BBGZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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