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Analog Devices Inc. ADXL372BCCZ-RL7
- Part No.:
- ADXL372BCCZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Accelerometers
- Package:
- 16-TFLGA
- Datasheet:
-
ADXL372BCCZ-RL7.pdf
- Description:
- ACCELEROMETER 200G SPI 16LGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADXL372BCCZ-RL7 from Analog Devices is an ultralow-power, 3-axis ±200 g MEMS accelerometer with 12-bit digital output at 100 mg/LSB scale factor, 3200 Hz ODR consuming only 22 µA at 2.5 V, and integrated autonomous impact detection for shock monitoring in battery-powered edge nodes.
For engineers reviewing the ADXL372BCCZ-RL7 datasheet, ADXL372BCCZ-RL7 pinout, ADXL372BCCZ-RL7 application, or ADXL372BCCZ-RL7 equivalent, key selection criteria include instant-on 1.4 µA impact wake-up latency (<1 ms), deep FIFO for transient capture without host intervention, selectable 200–3200 Hz bandwidth with 4-pole antialiasing filter, and dual SPI/I²C interface support in a 3 mm × 3.25 mm × 1.06 mm LGA package.
Technical Context
The ADXL372BCCZ-RL7 implements a polysilicon surface-micromachined capacitive sensing element with phase-sensitive demodulation, enabling true dc-coupled acceleration measurement up to ±200 g. Its digital architecture includes a 4-pole low-pass antialiasing filter (200–ODR/2 Hz) and a user-selectable first-order IIR high-pass filter (0.24–30.48 Hz) to reject temperature- and supply-induced offset drift.
Three autonomous operating modes-measurement (22 µA @ 3200 Hz), instant-on (1.4 µA impact-triggered), and wake-up (0.77–5.8 µA)-are managed by on-chip logic that eliminates processor polling. The device captures peak acceleration values per axis and stores them in dedicated highest-peak registers, while its 512-byte FIFO supports burst-mode data acquisition synchronized to external triggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Measurement Range | ±200 g - enables direct detection of severe shocks (e.g., drop impacts, machinery hammer strikes) without external signal conditioning. |
| Output Resolution | 12-bit at 100 mg/LSB - provides 0.1 g effective resolution across full range, sufficient for precise peak-g quantification in concussion or asset health applications. |
| Power Consumption | 22 µA @ 3200 Hz ODR - allows continuous high-bandwidth monitoring for >1 year on a CR2032 coin cell (220 mAh). |
| Instant-On Wake-Up | 1.4 µA standby + <1 ms transition to full bandwidth - ensures transient events (e.g., impact onset) are captured before decay, critical for shock forensics. |
| Bandwidth Control | User-selectable 200–3200 Hz ODR with 4-pole antialiasing filter - prevents frequency folding in high-slew applications like vibration-based structural monitoring. |
| Interface Support | SPI (up to 10 MHz) and limited I²C (1 MHz standard / 3.4 MHz fast mode) - enables flexible host integration with microcontrollers lacking native SPI peripherals. |
| Operating Temperature | −40°C to +105°C - supports deployment in automotive under-hood, industrial machinery, and outdoor IoT edge environments. |
Pinout & Package
ADXL372BCCZ-RL7 is housed in a 16-pin, 3 mm × 3.25 mm × 1.06 mm LGA (Land Grid Array) package with exposed thermal pad. Pin 12, 13, and 16 are GND; pins 2, 5, and 15 are NC or reserved; all GND pins must be connected to system ground for optimal noise immunity and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI/O (Pin 1) | Digital I/O supply | Independent 1.6–3.5 V rail decoupled with 1.1 µF capacitor; isolates digital noise from analog sensor core. |
| SCLK (Pin 4) | SPI clock input | Accepts 0.1–10 MHz clock; timing-critical for register access and FIFO readout in high-speed burst capture. |
| MOSI/SDA (Pin 6) | SPI data in / I²C data bidirectional | Shared function pin; mode selected via power-up configuration; requires pull-up for I²C operation. |
| MISO (Pin 7) | SPI data output | 3-state output driven only when CS is low; supports daisy-chaining multiple ADXL372 devices on shared bus. |
| CS/SCL (Pin 8) | SPI chip select / I²C clock | Active-low enable for SPI; functions as SCL in I²C mode; internal pull-down ensures safe default state. |
| INT1 (Pin 11) | Interrupt 1 output / external clock input | Configurable as motion-triggered interrupt or sync source for time-aligned multi-sensor sampling. |
| INT2 (Pin 9) | Interrupt 2 output / sync trigger input | Dedicated event flag (e.g., FIFO full, activity detected); also accepts external pulse for synchronized ODR alignment. |
| VS (Pin 14) | Analog core supply | 1.6–3.5 V main supply; PSRR −20 dB (100 Hz–1 kHz) ensures stable bias under noisy power conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous peak capture | Hardware-accelerated storage of maximum X/Y/Z acceleration per event in dedicated registers-eliminates host CPU overhead for post-processing transient peaks. |
| Deep 512-byte FIFO | Stores up to 85 full 3-axis samples (16-bit each) before host readout-reduces interrupt frequency and enables burst capture of impact waveforms without data loss. |
| Adjustable high-pass filter | Configurable −3 dB corner from 0.24 Hz to 30.48 Hz-removes thermal drift and mounting stress offsets while preserving impact transients above 200 Hz. |
| Multi-mode wake-up logic | Three independent detection paths (activity/inactivity/motion warning) with programmable thresholds and timers-enables adaptive power cycling in intermittent-use assets. |
| External trigger synchronization | INT1/INT2 accept external pulses to align ODR sampling across multiple sensors-critical for phase-coherent vibration analysis in multi-axis test rigs. |
Applications
| Impact Detection | Asset Health Monitoring |
|---|---|
|
Use Scenario: Real-time detection of mechanical shock during product drop testing or transportation handling. IC Role / Device Role / Timing Role: Primary impact sensor capturing sub-millisecond transients with hardware-triggered wake-up and peak hold. Use Value: Captures peak g-value and waveform envelope without host CPU involvement, enabling reliable pass/fail classification in unattended test fixtures. |
Use Scenario: Long-term vibration signature logging on rotating industrial equipment (pumps, motors, gearboxes). IC Role / Device Role / Timing Role: Low-duty-cycle event monitor that wakes only on anomaly thresholds, then records high-fidelity burst data to local memory. Use Value: Extends battery life beyond 5 years in wireless condition-monitoring nodes while preserving diagnostic-grade acceleration data for spectral analysis. |
| Concussion Assessment | IoT Edge Node Sensing |
|
Use Scenario: Helmet-mounted detection of head acceleration exceeding 10 g during contact sports or military training. IC Role / Device Role / Timing Role: Instant-on impact detector with <1 ms wake latency and configurable 10 g or 30 g threshold to minimize false alarms. Use Value: Ensures clinically relevant impact magnitude and timing are preserved for medical review, even when host MCU is in deep sleep. |
Use Scenario: Battery-powered environmental sensor node collecting motion context alongside temperature/humidity data. IC Role / Device Role / Timing Role: Ultra-low-power motion presence detector enabling duty-cycled radio transmission only upon sustained activity. Use Value: Reduces average system current to <5 µA by eliminating continuous accelerometer polling-extending field deployment to 10+ years on single coin cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-g, low-power accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL362BCCZ-RL7 | Lower range (±2 g / ±4 g / ±8 g), higher noise floor (175 µg/√Hz), no instant-on mode-requires host polling for activity detection. | Better suited for low-g motion tracking (e.g., human activity recognition), not shock/impact capture. | Select ADXL362BCCZ-RL7 only if measuring subtle motion rather than transient impacts; lacks peak capture and <1 ms wake-up. |
| ICM-20948 | 9-axis IMU (3-axis accel + 3-axis gyro + 3-axis mag), 3.6 mA typical active current, no sub-µA standby-no autonomous impact detection logic. | Targeted at AHRS and navigation where orientation matters more than shock fidelity. | Choose ICM-20948 when angular rate and heading data are required; ADXL372BCCZ-RL7 delivers superior impact resolution and 15× lower power for pure shock sensing. |
Compared with ADXL362BCCZ-RL7 and ICM-20948, the ADXL372BCCZ-RL7 uniquely combines ±200 g range, hardware-accelerated peak capture, and 1.4 µA instant-on mode-making it the only viable choice for battery-operated impact forensics where event fidelity and multi-year runtime are both mandatory.
Availability
ADXL372BCCZ-RL7 is available at Aetrix Electronics and suitable for impact detection, asset health monitoring, concussion assessment, and portable IoT edge nodes requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for ADXL372BCCZ-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 with precision sensing and power management solutions.
The ADXL372BCCZ-RL7 belongs to Analog Devices' micropower MEMS accelerometer product line, engineered specifically for battery-constrained shock and impact monitoring applications where autonomous event detection and multi-year operation are essential design requirements.
FAQ
What is the minimum detectable impact threshold for ADXL372BCCZ-RL7 in instant-on mode?
The ADXL372BCCZ-RL7 supports two factory-calibrated instant-on thresholds: a default target of 10 g ±5 g and an optional elevated setting of 30 g ±10 g. These thresholds are programmable via the X/Y/Z-Axis Activity Threshold Registers and apply independently per axis. The device achieves <1 ms wake-to-data latency at either setting, ensuring transient capture integrity. Threshold accuracy is confirmed across −40°C to +105°C per the datasheet's activity detection characterization.
Does ADXL372BCCZ-RL7 support true simultaneous sampling across all three axes?
Yes, the ADXL372BCCZ-RL7 performs true simultaneous sampling of X, Y, and Z axes using a shared internal ADC and timing engine. All three axis measurements within a single ODR cycle are captured at the exact same timestamp, eliminating inter-axis phase skew. This is verified in the "Synchronized Data Sampling" section and Figure 45 of the Rev. C datasheet, and is essential for accurate vector magnitude calculation and impact direction analysis.
Can ADXL372BCCZ-RL7 operate reliably from a 1.8 V supply?
Yes, ADXL372BCCZ-RL7 operates across a certified 1.6 V to 3.5 V supply range. At 1.8 V, it maintains full functionality-including ±200 g range, 12-bit resolution, and all operating modes-with typical current draw of 22 µA at 3200 Hz ODR. The device's PSRR remains −20 dB from 100 Hz to 1 kHz, ensuring robustness against supply ripple common in DC-DC converter outputs feeding low-voltage systems.
How does the ADXL372BCCZ-RL7 FIFO handle overflow during sustained high-g events?
The ADXL372BCCZ-RL7 FIFO operates in overwrite mode: when full, new samples replace the oldest entries. Its 512-byte depth holds up to 85 complete 3-axis samples (16-bit each). Overflow behavior is controlled by the FIFO_CONTROL register's FIFO_MODE bits. Critical impact data is preserved via the dedicated Highest Peak Registers, which retain the maximum acceleration per axis regardless of FIFO state-ensuring peak g-value is never lost even during prolonged saturation.
Is the ADXL372BCCZ-RL7 RoHS-compliant and qualified for automotive applications?
The ADXL372BCCZ-RL7 is RoHS-compliant and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3). While it is rated for −40°C to +105°C operation and used in automotive aftermarket systems, it is not AEC-Q200 qualified. For production automotive applications requiring AEC-Q200 certification, Analog Devices recommends the ADXL375 (AEC-Q200 qualified, ±200 g, but higher power) or consultation with their automotive team for qualified alternatives.
ADXL372BCCZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Digital
- Axis:
- X, Y, Z
- Acceleration Range:
- ±200g
- Sensitivity (LSB/g):
- 10
- Sensitivity (mV/g):
- -
- Bandwidth:
- 3.2kHz
- Output Type:
- SPI
- Voltage - Supply:
- 1.6V ~ 3.5V
- Features:
- Adjustable Bandwidth
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LGA (3x3.25)
ADXL372BCCZ-RL7 FAQ
1.How can I place an order for ADXL372BCCZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADXL372BCCZ-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 ADXL372BCCZ-RL7 reliable?
The price and inventory of ADXL372BCCZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADXL372BCCZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADXL372BCCZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADXL372BCCZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADXL372BCCZ-RL7?
ADXL372BCCZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADXL372BCCZ-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 ADXL372BCCZ-RL7?
For technical support, including ADXL372BCCZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADXL372BCCZ-RL7 requirements.
6.How does Aetrix verify that ADXL372BCCZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADXL372BCCZ-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 ADXL372BCCZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADXL372BCCZ-RL7?
All ADXL372BCCZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADXL372BCCZ-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 ADXL372BCCZ-RL7 part is unused and in its original packaging.
Return procedure for ADXL372BCCZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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