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Analog Devices Inc. ADXL377BCPZ-RL7
- Part No.:
- ADXL377BCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Accelerometers
- Package:
- 16-LFQFN Exposed Pad, CSP
- Datasheet:
-
ADXL377BCPZ-RL7.pdf
- Description:
- ACCEL 200G ANALOG 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,217
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Product details
Overview
ADXL377BCPZ-RL7 from Analog Devices is a small, low-power, 3-axis analog-output accelerometer with ±200 g full-scale range, 300 µA typical supply current, and user-adjustable bandwidth (up to 1300 Hz on X/Y axes) via external capacitors CX/CY/CZ. It operates from 1.8 V to 3.6 V and delivers ratiometric voltage outputs (6.5 mV/g typ.) for high-force event detection in compact, battery-powered systems.
For engineers reviewing the ADXL377BCPZ-RL7 datasheet, ADXL377BCPZ-RL7 pinout, ADXL377BCPZ-RL7 application, or ADXL377BCPZ-RL7 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts for high-g sensing use cases.
Technical Context
The ADXL377BCPZ-RL7 implements an open-loop polysilicon surface-micromachined sensor with differential capacitive detection and phase-sensitive demodulation. Its output amplifiers drive three analog voltage outputs (XOUT/YOUT/ZOUT) through internal 32 kΩ resistors, enabling bandwidth control via external capacitors per axis.
Each axis features independent low-pass filtering with −3 dB bandwidth defined by f = 1/(2π × 32 kΩ × C), supporting configurable trade-offs between noise floor (2.7 mg/√Hz on X/Y) and response speed. The device achieves ±0.5% nonlinearity up to 180 g and survives 10,000 g shock events while maintaining stable zero-g bias over −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±200 g - supports direct measurement of high-impact events like helmet impacts or industrial drop testing without signal clipping. |
| Supply Current | 300 µA typical - enables multi-year operation from coin-cell batteries in wearable concussion monitors. |
| Sensitivity | 6.5 mV/g typical (ratiometric to VS) - allows precise g-level quantization using standard 12-bit ADCs with 3 V reference. |
| Bandwidth (X/Y) | Up to 1300 Hz - sufficient for capturing transient shock pulses with sub-millisecond rise times. |
| Zero-g Bias Tempco | ±12 mg/°C (X/Y), ±30 mg/°C (Z) - defines worst-case offset drift requiring calibration in temperature-varying environments. |
| Noise Density | 2.7 mg/√Hz (X/Y), 4.3 mg/√Hz (Z) - determines minimum detectable acceleration when filtered to target bandwidth. |
| Shock Survival | 10,000 g - ensures functional integrity after mechanical abuse during handling or deployment. |
Pinout & Package
ADXL377BCPZ-RL7 uses a 3 mm × 3 mm × 1.45 mm, 16-lead lead frame chip scale package (LFCSP_LQ, CP-16-28) with exposed pad for mechanical anchoring (not electrically connected). Pin 1 is marked by a dot; pins 1 and 3 are reserved (connect to GND or leave open); pins 8–13 are no-connect; pins 14 and 15 are dual VS inputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3 (RES) | Reserved | Must be tied to GND or left floating - no internal connection; grounding improves noise immunity. |
| 2 (ST) | Self-Test Input | Apply VS to activate electrostatic beam deflection; outputs change by −6.5 mV (X), +6.5 mV (Y), +11.5 mV (Z) - validates sensor functionality without mechanical stimulus. |
| 4 (YOUT), 5 (XOUT), 16 (ZOUT) | Analog Output Channels | Voltage outputs proportional to acceleration (6.5 mV/g typ.); each requires external capacitor (CX/CY/CZ) to set bandwidth and reduce aliasing. |
| 6, 7 (GND) | Ground Reference | Dual ground pins minimize ground loop impedance; must connect directly to low-impedance system ground plane. |
| 14, 15 (VS) | Power Supply | Dual supply pins reduce IR drop; require local 0.1 µF ceramic decoupling capacitor close to pins. |
Key Features
| Feature | Design Value |
|---|---|
| 3-Axis Analog Outputs | Independent XOUT/YOUT/ZOUT pins enable simultaneous sampling with single ADC or three-channel acquisition - eliminates time skew in impact vector analysis. |
| User-Configurable Bandwidth | Per-axis RC filter (32 kΩ + CX/CY/CZ) allows tailored frequency response: e.g., 50 Hz for slow-motion monitoring vs. 1 kHz for crash pulse capture. |
| Ratiometric Output Scaling | Output voltage scales linearly with supply voltage (VS), simplifying system-level calibration when VS varies across operating conditions. |
| Integrated Self-Test | Electrostatic actuation via ST pin verifies sensor path integrity at power-up or runtime - critical for safety-critical head trauma detection systems. |
| High Shock Survivability | 10,000 g rating ensures continued operation after mounting shock, PCB reflow, or field mechanical stress - reduces field failure due to handling damage. |
Applications
| Concussion Detection System | Industrial Drop Tester |
|---|---|
|
Use Scenario: Mounted inside sports helmets or military headgear to detect linear acceleration exceeding 80 g within 10 ms of impact. IC Role / Device Role / Timing Role: Primary high-g analog sensor providing real-time voltage outputs to MCU ADC for impact magnitude and direction calculation. Use Value: ±200 g range captures clinically relevant thresholds; 1300 Hz X/Y bandwidth resolves sub-1 ms shock transients; 300 µA current enables multi-day battery life. |
Use Scenario: Embedded in automated test fixtures that drop consumer electronics from heights up to 2 m onto hard surfaces. IC Role / Device Role / Timing Role: Measures peak deceleration during impact to validate product structural integrity against MIL-STD-810H drop requirements. Use Value: 10,000 g shock survival prevents sensor failure during repeated high-energy drops; ±0.5% nonlinearity ensures repeatable pass/fail thresholds. |
| Automotive Crash Data Recorder | Portable Structural Health Monitor |
|
Use Scenario: Installed in vehicle cabin to record longitudinal/lateral acceleration during low-speed collisions for insurance claims verification. IC Role / Device Role / Timing Role: Analog front-end sensor feeding conditioned voltage signals to automotive-grade microcontroller ADC with configurable sampling rate. Use Value: Ratiometric output compensates for vehicle battery voltage fluctuations (12 V → 9–16 V); −40°C to +85°C rating covers under-hood and cabin environments. |
Use Scenario: Attached to bridges or machinery to log vibration signatures during operational stress or seismic events. IC Role / Device Role / Timing Role: Low-power analog accelerometer capturing long-duration acceleration history for FFT-based spectral analysis. Use Value: 3 mm × 3 mm LFCSP package enables unobtrusive mounting; adjustable bandwidth (0.5–1300 Hz) supports both low-frequency resonance detection and high-frequency fault signature capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-g analog accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL372BCCZ | Digital I²C/SPI output; 200 g range; 22 µA typical supply current; integrated digital filters and wake-up logic. | Better suited for ultra-low-power wireless sensor nodes where host MCU handles digital interface and sleep management. | Select ADXL372BCCZ when system already uses digital interfaces and requires <100 µA average current; ADXL377BCPZ-RL7 remains optimal for analog-sampling simplicity and higher bandwidth headroom. |
| MMA8452Q | 200 g range; I²C interface; 14-bit digital output; embedded motion detection; 150 µA active current. | Designed for tilt and gesture recognition; lacks 10,000 g shock rating and high-bandwidth analog output needed for impact capture. | Choose MMA8452Q only for cost-sensitive consumer applications with moderate shock requirements (<2000 g); ADXL377BCPZ-RL7 is required for medical-grade concussion detection or industrial shock validation. |
Compared with ADXL377BCPZ-RL7, ADXL372BCCZ offers lower power and smarter digital features but sacrifices analog bandwidth and ease of integration with legacy ADCs, while MMA8452Q provides lower cost and built-in intelligence but cannot withstand the mechanical stress or deliver the transient fidelity required for high-g event capture.
Availability
ADXL377BCPZ-RL7 is available at Aetrix Electronics and suitable for concussion detection systems, industrial drop testers, automotive crash data recorders, and portable structural health monitors requiring stable component supply, RoHS-compliant packaging, and guaranteed −40°C to +85°C operation.
Supply support for ADXL377BCPZ-RL7 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 ADXL377 belongs to Analog Devices' high-g MEMS accelerometer product line, engineered specifically for reliable measurement of short-duration, high-magnitude acceleration events in safety-critical and condition-monitoring applications.
FAQ
What is the maximum usable bandwidth of ADXL377BCPZ-RL7 on the X and Y axes?
The ADXL377BCPZ-RL7 achieves a maximum small-signal bandwidth of 1300 Hz on the X and Y axes when no external filter capacitor is used (CX = CY = 0). With external capacitors, bandwidth follows f−3dB = 1/(2π × 32 kΩ × C), allowing users to reduce bandwidth for improved noise performance - for example, 0.01 µF yields ~500 Hz. This flexibility makes ADXL377BCPZ-RL7 adaptable to both fast impact capture and low-noise vibration monitoring.
How does the self-test function work on ADXL377BCPZ-RL7, and what output changes should I expect?
The ADXL377BCPZ-RL7 self-test is activated by driving the ST pin to VS. This applies an electrostatic force to the internal MEMS beam, producing calibrated output shifts: −6.5 mV at XOUT, +6.5 mV at YOUT, and +11.5 mV at ZOUT (all referenced to zero-g baseline). These values correspond to −1.08 g, +1.08 g, and +1.83 g equivalents respectively. The ST pin must never exceed VS + 0.3 V; ADXL377BCPZ-RL7's self-test provides deterministic verification without mechanical stimulus.
Can ADXL377BCPZ-RL7 operate from a 1.8 V supply, and how does that affect sensitivity?
Yes, ADXL377BCPZ-RL7 is fully specified to operate from 1.8 V to 3.6 V. Its sensitivity is ratiometric: output voltage scales linearly with supply voltage. At 1.8 V, nominal sensitivity drops to ~3.5 mV/g (6.5 mV/g × 1.8/3.0), preserving measurement proportionality. Zero-g bias also scales ratiometrically (e.g., ~0.9 V at 1.8 V). This behavior simplifies system design across varying battery voltages without recalibration - a key advantage of ADXL377BCPZ-RL7 in portable equipment.
What is the purpose of the exposed pad on the ADXL377BCPZ-RL7 LFCSP package?
The exposed pad on the ADXL377BCPZ-RL7 package is not electrically connected to any internal circuitry but must be soldered to the PCB for mechanical stability. It anchors the 3 mm × 3 mm die to the board, reducing stress-induced offset drift and improving reliability during thermal cycling or mechanical shock. Analog Devices explicitly states in the datasheet that the pad "should be soldered for mechanical integrity" - omitting this step risks micro-fractures and long-term parameter shift in ADXL377BCPZ-RL7 deployments.
How does cross-axis sensitivity impact measurements in ADXL377BCPZ-RL7, and what is its typical value?
ADXL377BCPZ-RL7 exhibits ±1.4% typical cross-axis sensitivity - meaning acceleration applied purely along one axis induces up to 1.4% of full-scale output on orthogonal axes. This arises primarily from mechanical misalignment between sensor die and package, not electrical crosstalk. For accurate vector resolution (e.g., impact direction), system-level calibration is recommended. The monolithic 3-axis structure ensures high orthogonality, making ADXL377BCPZ-RL7 more consistent than discrete single-axis solutions where alignment errors compound.
ADXL377BCPZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-LFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Analog
- Axis:
- X, Y, Z
- Acceleration Range:
- ±200g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 6.5
- Bandwidth:
- 0.5Hz ~ 1.3kHz (X,Y), 0.5Hz ~ 1kHz (Z)
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 1.8V ~ 3.6V
- Features:
- Adjustable Bandwidth
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP-LQ (3x3)
ADXL377BCPZ-RL7 FAQ
1.How can I place an order for ADXL377BCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADXL377BCPZ-RL7 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 ADXL377BCPZ-RL7 reliable?
The price and inventory of ADXL377BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADXL377BCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADXL377BCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADXL377BCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADXL377BCPZ-RL7?
ADXL377BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADXL377BCPZ-RL7 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 ADXL377BCPZ-RL7?
For technical support, including ADXL377BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADXL377BCPZ-RL7 requirements.
6.How does Aetrix verify that ADXL377BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADXL377BCPZ-RL7 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 ADXL377BCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADXL377BCPZ-RL7?
All ADXL377BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADXL377BCPZ-RL7, 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 ADXL377BCPZ-RL7 part is unused and in its original packaging.
Return procedure for ADXL377BCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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