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Analog Devices Inc. ADXL335BCPZ
- Part No.:
- ADXL335BCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Accelerometers
- Package:
- 16-LQFN Exposed Pad, CSP
- Datasheet:
-
ADXL335BCPZ.pdf
- Description:
- ACCELEROMETER 3G ANALOG 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,277
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Product details
Overview
ADXL335BCPZ from Analog Devices is a complete 3-axis MEMS accelerometer with ratiometric analog voltage outputs, measuring ±3 g full-scale acceleration across X/Y/Z axes. It operates from 1.8 V to 3.6 V, consumes only 350 μA typical, and delivers low-noise performance (150 μg/√Hz on X/Y) for tilt and motion sensing in space-constrained portable systems.
For engineers reviewing the ADXL335BCPZ datasheet, ADXL335BCPZ pinout, ADXL335BCPZ application, or ADXL335BCPZ equivalent, this page provides verified technical context, bandwidth configuration guidance, self-test behavior, zero-g bias stability, and RoHS-compliant LFCSP package integration details essential for embedded motion-sensing design.
Technical Context
The ADXL335BCPZ implements an open-loop polysilicon surface-micromachined sensor with differential capacitive detection and phase-sensitive demodulation. Its signal chain includes on-chip amplification and a fixed 32 kΩ output impedance per axis, enabling user-defined bandwidth via external CX/CY/CZ capacitors.
Bandwidth is programmable from 0.5 Hz to 1600 Hz (X/Y) and 0.5 Hz to 550 Hz (Z) using the formula F−3 dB = 1/(2π × 32 kΩ × C). The device exhibits excellent temperature stability: zero-g bias drift ≤ ±1 mg/°C and sensitivity change ≤ ±0.01 %/°C, with no internal temperature compensation circuitry required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Measurement Range | ±3 g minimum full-scale - supports gravity-based tilt sensing and dynamic motion detection without clipping at moderate accelerations. |
| Supply Voltage | 1.8 V to 3.6 V - enables direct interface with common low-voltage microcontrollers and battery-powered systems. |
| Supply Current | 350 μA typical at 3 V - allows multi-year operation from coin-cell batteries in always-on motion wake-up applications. |
| Output Type | Ratiometric analog voltage - XOUT/YOUT/ZOUT scale linearly with VS (e.g., 300 mV/g at 3 V; 360 mV/g at 3.6 V), simplifying ADC reference alignment. |
| Zero-g Output | 1.5 V nominal at X/YOUT (VS/2), 1.5 V at ZOUT - provides stable mid-rail bias for single-supply signal conditioning and ADC input range utilization. |
| Noise Density | 150 μg/√Hz (X/Y), 300 μg/√Hz (Z) - defines minimum detectable acceleration; resolution improves quadratically as bandwidth is reduced via external capacitors. |
| Self-Test Response | −325 mV (X), +325 mV (Y), +550 mV (Z) at VS = 3 V - enables in-system functional verification without mechanical stimulus or external equipment. |
Pinout & Package
ADXL335BCPZ uses a 4 mm × 4 mm × 1.45 mm, 16-lead LFCSP_LQ (CP-16-14) package with exposed pad for mechanical integrity. Pin 1 is marked by a dot; exposed pad is not electrically connected but must be soldered.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 11, 13, 16 | NC | No internal connection; may be tied to COM for mechanical stability or left floating. |
| 2 | ST | Self-test control input - apply VS to activate electrostatic beam deflection; open or tied to COM for normal operation. |
| 3, 5, 6, 7 | COM | Analog ground reference - must be low-impedance connection to system ground to minimize noise coupling into outputs. |
| 8 | ZOUT | Analog voltage output proportional to Z-axis acceleration - 300 mV/g sensitivity, ratiometric to VS, 550 Hz max bandwidth. |
| 10 | YOUT | Analog voltage output proportional to Y-axis acceleration - 300 mV/g sensitivity, ratiometric to VS, 1600 Hz max bandwidth. |
| 12 | XOUT | Analog voltage output proportional to X-axis acceleration - 300 mV/g sensitivity, ratiometric to VS, 1600 Hz max bandwidth. |
| 14, 15 | VS | Single power supply input - accepts 1.8 V–3.6 V; requires local 0.1 μF decoupling capacitor near pins. |
Key Features
| Feature | Design Value |
|---|---|
| 3-axis integrated MEMS sensor | Single monolithic die with orthogonal X/Y/Z sensing elements - eliminates inter-device alignment error and reduces PCB area vs. discrete axis solutions. |
| User-configurable bandwidth | Independent CX/CY/CZ capacitors set each axis bandwidth - enables optimization of noise vs. response time per axis (e.g., slower Z for tilt, faster X/Y for motion). |
| Ratiometric output scaling | All outputs scale linearly with VS - eliminates need for separate voltage reference when using same supply for ADC and ADXL335BCPZ. |
| On-chip self-test | Digital ST pin activates calibrated electrostatic force - verifies sensor functionality, signal chain integrity, and PCB interconnects without external test fixtures. |
| High shock survivability | 10,000 g survival rating - ensures reliability in drop-prone consumer devices and industrial handling environments. |
Applications
| Mobile Device Tilt Sensing | Disk Drive Free-Fall Protection |
|---|---|
Use Scenario: Detecting orientation changes in smartphones and tablets to auto-rotate display content. IC Role / Device Role / Timing Role: Gravity-referenced static acceleration measurement with <1 mg/°C zero-g drift to maintain accurate tilt angle over temperature. Use Value: Enables reliable portrait/landscape switching across −40°C to +85°C operating range using only analog outputs and standard ADC resources. |
Use Scenario: Triggering head parking before impact during laptop free-fall events. IC Role / Device Role / Timing Role: High-speed dynamic acceleration detection with 1 ms turn-on time and 1600 Hz X/Y bandwidth to capture sudden vertical deceleration. Use Value: Provides sufficient response margin to initiate protective action within 10–20 ms of fall onset, preventing disk damage. |
| Gaming Controller Motion Tracking | Sports Activity Monitor |
Use Scenario: Translating hand gestures and swing motions into real-time game inputs for motion-controlled consoles. IC Role / Device Role / Timing Role: Low-latency analog output with configurable 50–200 Hz bandwidth per axis to balance responsiveness and noise rejection during rapid movements. Use Value: Delivers jitter-free motion vector data without digital filtering delay, supporting sub-10 ms controller-to-display latency requirements. |
Use Scenario: Measuring step count, jump height, and activity intensity in wearable fitness trackers. IC Role / Device Role / Timing Role: Ultra-low-power 350 μA operation with ratiometric outputs - extends battery life while maintaining consistent sensitivity across varying battery voltage. Use Value: Enables multi-week operation on small Li-ion cells without recalibration due to supply voltage drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis analog-output accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL326BCPZ | ±16 g range, higher noise density (270 μg/√Hz), same LFCSP package and pinout. | Better suited for high-shock environments (e.g., industrial vibration monitoring) but less sensitive for tilt sensing. | Select ADXL326BCPZ when full-scale range > ±3 g is required; ADXL335BCPZ remains optimal for gravity-referenced applications. |
| MMA8452Q | I²C digital output, embedded FIFO, lower supply current (150 μA), different 16-pin QFN package (no pin compatibility). | Reduces host MCU ADC resource usage and enables advanced features like orientation detection and configurable interrupts. | Choose MMA8452Q when digital interface, low power, and on-chip intelligence are prioritized over analog simplicity and direct voltage scaling. |
Compared with ADXL335BCPZ, ADXL326BCPZ trades sensitivity for extended range, while MMA8452Q replaces analog flexibility with digital integration and lower power-neither is pin-compatible, requiring layout revision for substitution.
Availability
ADXL335BCPZ is available at Aetrix Electronics and suitable for mobile device tilt sensing, disk drive protection, gaming controller motion tracking, sports activity monitoring, and image stabilization requiring stable component supply and long-term manufacturability.
Supply support for ADXL335BCPZ 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, headquartered in Norwood, MA, with decades of expertise in precision motion sensing and inertial measurement.
The ADXL335BCPZ belongs to Analog Devices' legacy low-power analog-output MEMS accelerometer product line, designed specifically for cost-sensitive, battery-operated tilt and motion applications where simplicity, stability, and minimal external components are critical.
FAQ
What is the recommended decoupling capacitor for ADXL335BCPZ?
A 0.1 μF ceramic capacitor (CDC) placed as close as possible to the VS pins is recommended for most applications. If noise at the 50 kHz internal clock frequency is present, add a 100 Ω resistor or ferrite bead in series with VS and a bulk 1 μF capacitor in parallel with CDC. Ground connection impedance must remain low to prevent noise coupling into ADXL335BCPZ outputs.
How does supply voltage affect ADXL335BCPZ output sensitivity and zero-g bias?
ADXL335BCPZ output is ratiometric: sensitivity scales linearly with VS (e.g., 300 mV/g at 3 V → 360 mV/g at 3.6 V), and zero-g bias equals VS/2 (e.g., 1.5 V at 3 V → 1.8 V at 3.6 V). This eliminates need for separate voltage references but requires matching ADC reference if used with variable supply rails.
Can ADXL335BCPZ measure static tilt accurately over temperature?
Yes. ADXL335BCPZ achieves ±1 mg/°C zero-g bias drift and ±0.01 %/°C sensitivity drift, enabling stable tilt angle calculation across −40°C to +85°C. Its polysilicon MEMS structure and innovative design eliminate quantization error and provide low temperature hysteresis (<3 mg over −25°C to +70°C).
What is the maximum achievable bandwidth on each axis of ADXL335BCPZ?
Maximum bandwidth is 1600 Hz on XOUT and YOUT, and 550 Hz on ZOUT, achieved with no external filter capacitor (CX = CY = CZ = 0). Bandwidth is set by F−3 dB = 1/(2π × 32 kΩ × C); for example, 0.0047 μF yields ~1.6 kHz on X/Y and ~500 Hz on Z. Internal RFILT tolerance is ±15%, so actual bandwidth varies accordingly.
How is the self-test function implemented and verified on ADXL335BCPZ?
The ST pin applies electrostatic force to the MEMS beam when driven to VS. At 3 V, this produces −325 mV (X), +325 mV (Y), and +550 mV (Z) output shifts - measurable with a multimeter or ADC. ST can be left open or tied to COM during normal operation. Never exceed VS + 0.3 V on ST; use clamping diode if system has multiple supplies.
ADXL335BCPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-LQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Analog
- Axis:
- X, Y, Z
- Acceleration Range:
- ±3g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 300
- Bandwidth:
- 1.6kHz (X,Y), 550Hz (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 (4x4)
ADXL335BCPZ FAQ
1.How can I place an order for ADXL335BCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADXL335BCPZ 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 ADXL335BCPZ reliable?
The price and inventory of ADXL335BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADXL335BCPZ is usually 5 days.
3.What payment methods are accepted for ADXL335BCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADXL335BCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADXL335BCPZ?
ADXL335BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADXL335BCPZ 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 ADXL335BCPZ?
For technical support, including ADXL335BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADXL335BCPZ requirements.
6.How does Aetrix verify that ADXL335BCPZ is sourced from the original manufacturer or authorized distributors?
All ADXL335BCPZ 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 ADXL335BCPZ meets industry standards.
7.What is the process for return or replacement of ADXL335BCPZ?
All ADXL335BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with ADXL335BCPZ, 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 ADXL335BCPZ part is unused and in its original packaging.
Return procedure for ADXL335BCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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