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Analog Devices Inc. AD22279-A-R2
- Part No.:
- AD22279-A-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Accelerometers
- Package:
- 8-CLCC
- Datasheet:
-
AD22279-A-R2.pdf
- Description:
- ACCELEROMETER 35G ANALOG 8CLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,297
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Product details
Overview
AD22279-A-R2 from Analog Devices is a single-axis, high-g iMEMS® accelerometer with ±35 g full-scale range, 400 Hz Bessel filter, and ratiometric voltage output. It delivers 0.2% linearity, 1.3 mA quiescent current, and operates across −40°C to +105°C for automotive airbag collision sensing and industrial shock detection.
For engineers reviewing the AD22279-A-R2 datasheet, AD22279-A-R2 pinout, AD22279-A-R2 application, or AD22279-A-R2 equivalent, key selection criteria include its self-test capability, differential EMI/RFI immunity, prefilter headroom of 280 g, and ceramic LCC package compatibility with Sn/Pb and Pb-free reflow.
Technical Context
The AD22279-A-R2 implements a fully differential surface-micromachined sensor with electrical zero-force feedback, eliminating net electrostatic force on the movable frame. Its 24 kHz resonant frequency lies well above the 400 Hz signal bandwidth, preventing resonance-induced distortion in vibration monitoring.
It integrates a 2-pole Bessel anti-aliasing filter, ratiometric output scaling relative to VDD, and digital self-test activation via the ST pin - enabling full mechanical and electrical verification without external stimulus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±35 g - supports front/side impact airbag triggering with margin against saturation |
| Nonlinearity | 0.2% of full scale - ensures accurate acceleration magnitude estimation over full range |
| −3 dB Bandwidth | 400 Hz (Bessel) - preserves transient fidelity while rejecting aliasing above signal band |
| Supply Current | 1.3 mA - enables low-power operation in battery-backed safety systems |
| Self-Test Output Change | 440–660 mV at VDD = 5 V - provides unambiguous pass/fail verification of sensor path integrity |
| Output Noise Density | 1.1–3 mg/√Hz (10–400 Hz) - maintains resolution for low-amplitude vibration analysis |
| Quiescent Supply Range | 3.5 V to 6 V - accommodates automotive battery fluctuations without regulation |
Pinout & Package
AD22279-A-R2 is housed in an 8-terminal ceramic leadless chip carrier (LCC), measuring 5 mm × 5 mm × 2 mm, qualified for automotive use and compatible with standard Pb-free reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 5 | NC | No internal connection - must remain unconnected per design |
| 3 | COM | Common reference node - serves as analog ground return for differential sensing |
| 4 | ST | Self-test digital input - activates electrostatic forcing cells to verify full signal chain |
| 6 | XOUT | Single-ended analog output - voltage ratiometric to VDD, centered at VDD/2 at 0 g |
| 7, 8 | VDD / VDD2 | Power supply inputs - dual pins reduce IR drop and improve PSRR in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential sensor & signal path | Rejects common-mode EMI/RFI up to 400 kHz clock frequency without external filtering |
| On-chip 2-pole Bessel filter | Provides linear-phase response and minimal overshoot for crash pulse fidelity |
| Comprehensive self-test | Validates mechanical displacement, demodulation, amplification, and filtering in one command |
| Ratiometric output | Scales output voltage proportionally with VDD - eliminates need for precision voltage reference |
| High prefilter clipping headroom | 280 g - prevents saturation during high-slew transients before filtering |
Applications
| Frontal Airbag Deployment | Side-Impact Occupant Sensing |
|---|---|
Use Scenario: Detects rapid deceleration during frontal collisions to trigger airbag inflation within <10 ms. IC Role / Device Role / Timing Role: Primary acceleration measurement element providing time-critical analog voltage output to airbag controller MCU. Use Value: ±35 g range and 400 Hz bandwidth capture crash onset with minimal phase distortion; self-test confirms readiness before vehicle power-up. | Use Scenario: Mounted in door pillar to sense lateral acceleration during side collisions or rollovers. IC Role / Device Role / Timing Role: Single-axis inertial sensor delivering ratiometric output for real-time side-impact decision logic. Use Value: Ceramic LCC package withstands mechanical shock and temperature cycling; COM pin enables robust grounding in constrained space. |
| Industrial Shock Monitoring | Heavy Equipment Vibration Control |
Use Scenario: Installed on hydraulic press frames to detect abnormal impact events indicating tool failure or misalignment. IC Role / Device Role / Timing Role: High-g analog sensor feeding into PLC analog input module for event logging and shutdown control. Use Value: 0.2% linearity ensures repeatable threshold detection; 1.3 mA consumption allows direct 24 V loop-powered operation with local regulation. | Use Scenario: Embedded in diesel generator mounts to monitor torsional vibration and prevent resonance damage. IC Role / Device Role / Timing Role: Signal-conditioned acceleration transducer interfacing with vibration analysis DSP via ADC. Use Value: Differential architecture rejects engine EMI; 24 kHz resonant frequency avoids interference with dominant 50–200 Hz machinery harmonics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-axis high-g accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD22280-R2 | ±50 g full-scale range; higher sensitivity tolerance (±2% vs. ±2.75% for AD22279-A-R2) | Better suited for higher-threshold crash detection where ±35 g is insufficient | Select when system requires extended dynamic range beyond ±35 g without changing PCB layout |
| AD22281-R2 | ±70 g full-scale range; lower sensitivity (25.65–28.35 mV/g vs. 52.25–57.75 mV/g) | Optimized for extreme shock environments like artillery or drop-test instrumentation | Choose for applications demanding maximum overload survivability and reduced output swing per g |
Compared with AD22280-R2 and AD22281-R2, the AD22279-A-R2 offers the highest sensitivity and optimal balance of range, noise, and self-test margin for mainstream automotive airbag systems - making it the preferred choice where ±35 g coverage aligns with regulatory crash pulse requirements.
Availability
AD22279-A-R2 is available at Aetrix Electronics and suitable for frontal airbag deployment, side-impact occupant sensing, and industrial shock monitoring requiring stable component supply across automotive production lifecycles.
Supply support for AD22279-A-R2 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 company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The ADXL78 family - including AD22279-A-R2 - was designed specifically for automotive safety systems, delivering robust, temperature-stable acceleration measurement with integrated self-test for ASIL-B–aligned applications.
FAQ
What is the operating temperature range of the AD22279-A-R2?
The AD22279-A-R2 is specified to operate from −40°C to +105°C, meeting automotive under-hood and passenger compartment environmental requirements. This range is fully supported by its ceramic LCC package and internal circuitry, with all key parameters - including offset, sensitivity, and self-test output - guaranteed across the full span.
Does the AD22279-A-R2 require external calibration for production use?
No, the AD22279-A-R2 is factory calibrated and does not require end-user calibration. Its tight sensitivity tolerance (±2.75% over temperature), low 0 g offset (±200 mV), and ratiometric output eliminate the need for system-level gain/offset trimming in most automotive and industrial implementations.
How is the self-test function of the AD22279-A-R2 activated and verified?
The AD22279-A-R2 self-test is activated by applying a logic-high signal (≥3.5 V) to the ST pin. This triggers electrostatic forcing cells, producing a 440–660 mV step change at XOUT when VDD = 5 V. Verification is performed by measuring this output shift - confirming integrity of the sensor, demodulator, amplifier, and filter stages.
Can the AD22279-A-R2 be used with a 3.3 V supply?
No - the AD22279-A-R2 requires a minimum supply of 3.5 V and is optimized for 5 V operation. While its functional supply range extends to 6 V, operation below 3.5 V is not guaranteed and may result in degraded performance, failed self-test, or undefined output behavior.
What packaging and compliance certifications apply to the AD22279-A-R2?
The AD22279-A-R2 is supplied in an 8-terminal ceramic LCC (E-8-1) package, RoHS compliant, and qualified for automotive applications per AEC-Q100 stress testing. It supports both Sn/Pb and Pb-free solder reflow profiles, with peak temperature rated at 240°C for Sn/Pb and 260°C for Pb-free processes.
AD22279-A-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iMEMS®
- Package/Case:
- 8-CLCC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Analog
- Axis:
- X
- Acceleration Range:
- ±35g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 55
- Bandwidth:
- 400Hz
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-CLCC (5x5)
AD22279-A-R2 FAQ
1.How can I place an order for AD22279-A-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD22279-A-R2 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 AD22279-A-R2 reliable?
The price and inventory of AD22279-A-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD22279-A-R2 is usually 5 days.
3.What payment methods are accepted for AD22279-A-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD22279-A-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD22279-A-R2?
AD22279-A-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD22279-A-R2 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 AD22279-A-R2?
For technical support, including AD22279-A-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD22279-A-R2 requirements.
6.How does Aetrix verify that AD22279-A-R2 is sourced from the original manufacturer or authorized distributors?
All AD22279-A-R2 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 AD22279-A-R2 meets industry standards.
7.What is the process for return or replacement of AD22279-A-R2?
All AD22279-A-R2 units undergo pre-shipment inspection (PSI). If there is an issue with AD22279-A-R2, 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 AD22279-A-R2 part is unused and in its original packaging.
Return procedure for AD22279-A-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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