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Analog Devices Inc. ADXL202AQC-REEL
- Part No.:
- ADXL202AQC-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Accelerometers
- Package:
- 14-CSOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADXL202AQC-REEL.pdf
- Description:
- DUAL-AXIS IMEMS ACCELEROMETER
- Quantity:
- Payment:
- Shipping:
Inventory:305
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Product details
Overview
ADXL202AQC-REEL from Analog Devices is a dual-axis surface-micromachined iMEMS® accelerometer with ±2 g measurement range, 12.5 %/g duty cycle sensitivity, and 500 µg/√Hz noise density. It delivers digital duty cycle outputs for X/Y axes, operates from +3.0 V to +5.25 V, and is rated for –40°C to +85°C industrial temperature range-enabling tilt sensing in battery-powered vehicle security systems and inertial navigation subsystems.
For engineers reviewing the ADXL202AQC-REEL datasheet, ADXL202AQC-REEL pinout, ADXL202AQC-REEL application, or ADXL202AQC-REEL equivalent, this page provides verified technical context, confirmed pin functions, real-world bandwidth configuration rules, and validated alternative options for dual-axis motion sensing designs requiring stable low-power analog/digital acceleration measurement.
Technical Context
The ADXL202AQC-REEL integrates polysilicon surface-micromachined X/Y sensors with on-chip signal conditioning, phase-sensitive demodulation, and duty cycle modulation (DCM). Its open-loop architecture measures both static (gravity) and dynamic (vibration) acceleration without external ADCs.
Bandwidth is set per axis via external capacitors CX/CY at XFILT/YFILT pins (e.g., 0.01 µF → 500 Hz), while output period T2 (0.5–10 ms) is controlled by a single RSET resistor connected to pin 5. The device shares T2 between axes and supports analog reconstruction via RC filtering of duty cycle outputs or direct buffered use of XFILT/YFILT pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Measurement Range | ±2 g - supports tilt sensing across full gravity vector (±1 g) with margin for vibration-induced overrange |
| Duty Cycle Sensitivity | 12.5 %/g - enables direct microcontroller counter/timer decoding without A/D conversion |
| Noise Density | 500 µg/√Hz - resolves signals below 5 mg at ≤60 Hz bandwidth, critical for precision tilt applications |
| Supply Voltage | +3.0 V to +5.25 V - compatible with standard logic rails and battery-backed 3.3 V/5 V systems |
| Quiescent Current | 0.6 mA - allows >1-year operation on coin-cell batteries when combined with power cycling |
| Operating Temperature | –40°C to +85°C - qualified for automotive cabin, industrial control, and outdoor equipment environments |
| Shock Survival | 1000 g - withstands mechanical handling and field deployment shocks without calibration loss |
Pinout & Package
The ADXL202AQC-REEL is housed in a hermetic 14-lead Surface Mount CERPAK package (QC-14), with dual VDD (pins 13–14) and dual COM (pins 4–7) for robust power/ground distribution.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6, 8 | No Connect | Must remain unconnected; no internal bonding or function |
| 2 | Test Point | VTP - reserved for factory testing; leave open-circuit in application |
| 3 | Self-Test Control | ST - apply VDD to induce 10% duty cycle shift (≈800 mg) for functional verification |
| 4, 7 | Common Ground | COM - connect both pins together and tie to system ground for noise immunity |
| 5 | T2 Period Set | T2 - connect RSET resistor (e.g., 125 kΩ for 1 ms period) to ground to define DCM timing |
| 9 | Y-Axis Duty Cycle Output | YOUT - digital PWM signal proportional to Y-axis acceleration; decoded via MCU timer |
| 10 | X-Axis Duty Cycle Output | XOUT - digital PWM signal proportional to X-axis acceleration; shares T2 with YOUT |
| 11 | Y-Axis Analog Filter Node | YFILT - connect capacitor CY (e.g., 0.01 µF) to set 500 Hz anti-aliasing bandwidth |
| 12 | X-Axis Analog Filter Node | XFILT - connect capacitor CX (e.g., 0.01 µF) to set 500 Hz anti-aliasing bandwidth |
| 13, 14 | Positive Supply | VDD - connect pins 13 and 14 directly; decouple with 0.1 µF CDC to COM |
Key Features
| Feature | Design Value |
|---|---|
| Dual-axis monolithic integration | Single-chip X/Y sensing eliminates inter-device alignment error (<±0.01°) and reduces PCB area vs. discrete solutions |
| User-adjustable bandwidth | Per-axis 0.01 Hz–5 kHz setting via external CX/CY capacitors enables application-specific noise/bandwidth trade-offs |
| Ratiometric analog outputs | XFILT/YFILT provide supply-voltage-referenced voltage outputs (e.g., 300 mV/g at 5 V) for high-bandwidth (5 kHz) analog interfacing |
| Low-power duty cycle interface | 0.6 mA quiescent current + software-controllable power cycling enables <20 µA average current in battery systems |
| On-chip self-test | Electrostatic beam actuation via ST pin verifies sensor functionality and signal chain integrity without mechanical stimulus |
Applications
| 2-Axis Tilt Sensing | Vehicle Security Systems |
|---|---|
Use Scenario: Detecting unauthorized vehicle inclination during towing or lifting using gravity vector decomposition. IC Role / Device Role / Timing Role: ADXL202AQC-REEL serves as the primary static acceleration reference, measuring X/Y components of Earth's gravity to compute pitch/roll angles via ASIN(Ax/1g) and ASIN(Ay/1g). Use Value: ±2 g range and 5 mg resolution at 60 Hz allow detection of sub-degree tilt changes while surviving 1000 g shock events during installation or tampering. | Use Scenario: Triggering alarm activation when vehicle experiences sudden lateral or longitudinal acceleration beyond idle thresholds. IC Role / Device Role / Timing Role: ADXL202AQC-REEL acts as the motion event detector, generating duty cycle outputs decoded by MCU to identify jerk, impact, or tow events in real time. Use Value: Digital outputs eliminate external ADC cost; 0.6 mA supply current extends battery life in standalone security modules operating for months without recharge. |
| Inertial Navigation | Battery Powered Motion Sensing |
Use Scenario: Providing short-term orientation tracking in GPS-denied environments (e.g., tunnels, underground parking) for dead reckoning. IC Role / Device Role / Timing Role: ADXL202AQC-REEL supplies calibrated X/Y acceleration data to fusion algorithms, enabling integration into velocity and position estimates over limited time windows. Use Value: Low noise floor (500 µg/√Hz) and stable zero-g offset (±2 g initial) minimize drift accumulation during brief GPS outages. | Use Scenario: Enabling wake-on-motion functionality in portable medical monitors or asset trackers powered by CR2032 cells. IC Role / Device Role / Timing Role: ADXL202AQC-REEL operates in ultra-low-power mode-powered only during scheduled sampling intervals-to detect movement and trigger host MCU wake-up. Use Value: Power cycling capability reduces average current to <20 µA, achieving multi-year battery life while maintaining responsiveness to motion events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-axis acceleration sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL320ARUZ-REEL | Provides analog voltage outputs (±1 g range, 1000 mV/g) instead of duty cycle; requires external ADC; higher supply current (0.9 mA) | Better suited for high-speed analog acquisition systems where duty cycle timing overhead is unacceptable | Select ADXL320ARUZ-REEL when analog interface simplicity outweighs power and component count advantages of ADXL202AQC-REEL |
| ADXL203CE-REEL7 | Successor part with improved stability (±0.01° alignment error), lower noise (200 µg/√Hz), and extended temperature range (–40°C to +105°C); pin-compatible but requires updated RSET/CX/CY values | Preferred for new designs requiring higher accuracy, lower noise, or automotive under-hood deployment | Choose ADXL203CE-REEL7 for next-generation products where long-term calibration stability and enhanced noise performance justify migration effort |
Compared with ADXL202AQC-REEL, ADXL320ARUZ-REEL trades digital simplicity for analog fidelity and higher power, while ADXL203CE-REEL7 offers measurable improvements in noise, alignment, and temperature range-making it the recommended upgrade path for new designs demanding higher metrological performance.
Availability
ADXL202AQC-REEL is available at Aetrix Electronics and suitable for vehicle security systems, battery-powered motion sensing, inertial navigation subsystems, and 2-axis tilt sensing applications requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for ADXL202AQC-REEL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADXL202AQC-REEL belongs to Analog Devices' iMEMS® accelerometer product line, designed specifically for cost-sensitive, low-power dual-axis motion sensing applications including tilt measurement, seismic monitoring, and motion-triggered control.
FAQ
What is the measurement range and sensitivity of the ADXL202AQC-REEL?
The ADXL202AQC-REEL has a ±2 g measurement range and a nominal duty cycle sensitivity of 12.5 %/g per axis. This means a 1 g acceleration produces a 12.5 % change in duty cycle from the 50 % zero-g baseline. The specification is guaranteed across the –40°C to +85°C operating temperature range, with nonlinearity of 0.2 % of full scale and alignment error between X/Y axes of ±0.01°. These parameters make ADXL202AQC-REEL suitable for precision tilt sensing where gravity vector resolution is critical.
How do I configure the bandwidth and output period for the ADXL202AQC-REEL?
Bandwidth is set independently for each axis using external capacitors CX and CY connected to pins 12 (XFILT) and 11 (YFILT), respectively-e.g., 0.01 µF yields ~500 Hz. Output period T2 (0.5–10 ms) is set by a single resistor RSET connected from pin 5 (T2) to ground-e.g., 125 kΩ gives ~1 ms. ADXL202AQC-REEL shares T2 between axes, so one resistor configures both XOUT and YOUT timing. The internal 32 kΩ RFILT resistor tolerance (±15 %) must be considered when selecting CX/CY for precise bandwidth targeting.
Can the ADXL202AQC-REEL operate from a 3.3 V supply?
Yes, the ADXL202AQC-REEL operates from +3.0 V to +5.25 V, making it fully compatible with 3.3 V systems. At 3.3 V, its quiescent current drops to approximately 0.4 mA (vs. 0.6 mA at 5 V), improving battery life in portable applications. All specifications-including ±2 g range, 12.5 %/g sensitivity, and 500 µg/√Hz noise density-remain valid across the full supply range. The 0 g duty cycle remains centered at 50 %, and analog outputs at XFILT/YFILT scale ratiometrically (e.g., ~198 mV/g at 3.3 V).
What is the purpose of the ST (Self-Test) pin on the ADXL202AQC-REEL?
The ST pin (pin 3) enables electrostatic self-test: applying VDD to ST exerts force on the MEMS beam, producing a predictable 10 % duty cycle shift at XOUT/YOUT (equivalent to ~800 mg acceleration). This verifies sensor functionality, signal chain integrity, and MCU timing capture without mechanical stimulus. In normal operation, ST may be left open or tied to COM. The test response is repeatable and independent of supply voltage or temperature, providing reliable built-in diagnostics for ADXL202AQC-REEL in safety-critical deployments.
Does the ADXL202AQC-REEL require external components for basic operation?
Yes, minimal external components are required: a 0.1 µF decoupling capacitor (CDC) from VDD (pins 13–14) to COM (pins 4–7); an RSET resistor (e.g., 125 kΩ) from T2 (pin 5) to ground; and filter capacitors CX/CY (e.g., 0.01 µF each) at XFILT (pin 12) and YFILT (pin 11). No external ADC, op amps, or clock sources are needed-the ADXL202AQC-REEL generates self-timed digital outputs and includes internal oscillator, demodulator, and modulator circuitry. All passive components are specified in the datasheet with tolerance guidance.
ADXL202AQC-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-CSOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Analog
- Axis:
- X, Y
- Acceleration Range:
- ±2g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 312
- Bandwidth:
- 0.01Hz ~ 5kHz
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 5.25V
- Features:
- Adjustable Bandwidth, Selectable Low Pass Filter
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-CERPAK
ADXL202AQC-REEL FAQ
1.How can I place an order for ADXL202AQC-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADXL202AQC-REEL 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 ADXL202AQC-REEL reliable?
The price and inventory of ADXL202AQC-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADXL202AQC-REEL is usually 5 days.
3.What payment methods are accepted for ADXL202AQC-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADXL202AQC-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADXL202AQC-REEL?
ADXL202AQC-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADXL202AQC-REEL 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 ADXL202AQC-REEL?
For technical support, including ADXL202AQC-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADXL202AQC-REEL requirements.
6.How does Aetrix verify that ADXL202AQC-REEL is sourced from the original manufacturer or authorized distributors?
All ADXL202AQC-REEL 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 ADXL202AQC-REEL meets industry standards.
7.What is the process for return or replacement of ADXL202AQC-REEL?
All ADXL202AQC-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADXL202AQC-REEL, 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 ADXL202AQC-REEL part is unused and in its original packaging.
Return procedure for ADXL202AQC-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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