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NXP Semiconductors MMA2725WR2
- Part No.:
- MMA2725WR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA2725WR2.pdf
- Description:
- ACCELEROMETER 250G PCM/SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,651
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Product details
Overview
MMA2725WR2 from NXP Semiconductors (formerly Freescale) is an X-axis, ±250 g overdamped satellite accelerometer with DSI3 interface compliance, integrated voltage regulators, and six selectable low-pass filters. It delivers 1.9456 LSB/g sensitivity, 16 μs internal sample rate with 1 μs interpolation, and operates across -40°C to +125°C for automotive crash sensing and rollover detection.
For engineers reviewing the MMA2725WR2 datasheet, MMA2725WR2 pinout, MMA2725WR2 application, or MMA2725WR2 equivalent, key selection criteria include DSI3 Discovery Mode support, high-side bus switch output driver capability, background diagnostic mode during periodic data collection, and AEC-Q100 qualification for automotive safety-critical systems.
Technical Context
The MMA2725WR2 implements a sigma-delta converter with sinc filter, followed by digital signal processing including configurable IIR high-pass and six-option FIR low-pass filtering. Its DSI3 physical layer supports daisy-chain topology via BUSSW-driven external p-channel FET and uses BUS_I/BUS_O for supply and communication over a single-wire bus.
Internal architecture includes dual regulated supplies (VREG at 2.5 V ±0.1 V, VREGA at 2.5 V ±0.075 V), VBUF buffer regulator for EMC immunity, and dedicated test pins (TEST_MOSI/TEST_MISO/TEST_CS/TEST_SCLK) isolated from functional operation. Acceleration data is output in signed 10-bit format with ±511 LSB range and digital offset cancellation achieving ±1 LSB residual error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-scale range | ±250 g X-axis - defines maximum measurable acceleration before clipping at 1600 g (ADC limit) or 2300 g (g-cell limit) |
| Sensitivity | 1.9456 LSB/g - enables resolution of ~0.514 g per LSB in 10-bit output mode |
| DSI3 interface | Compliant with DSI3 Standard Rev. 1.0 - supports Command & Response, Periodic Data Collection, and Background Diagnostic Modes |
| Operating temperature | -40°C to +125°C - qualified per AEC-Q100 Rev. G for under-hood automotive use |
| Low-pass filter options | 180 Hz to 1200 Hz - six selectable cutoff frequencies for noise vs. bandwidth trade-off |
| Sample rate | 16 μs internal sampling with 1 μs interpolation - provides precise timing for event-triggered capture |
| Package | 16-pin QFN, 6 mm × 6 mm × 2 mm, case 2086-01 - surface-mount compatible with automated assembly |
Pinout & Package
16-pin QFN package (6 mm × 6 mm × 2 mm, case 2086-01) with exposed die attach pad connected internally to VSS. Requires external capacitors on VBUF, VREG, and VREGA pins per Figure 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BUS_O | Supply out | Provides power to next slave in daisy chain; requires external capacitor to VSS |
| BUS_I | Supply and communication | Main DSI3 supply input; connects to master's BUS_I line and requires capacitor to BUSRTN |
| BUSRTN | Supply return | DSI3 supply return node; must be tied to system ground |
| BUSSW | Bus switch gate drive | Drives external p-channel FET gate for daisy-chain switching; requires external pullup resistor |
| VBUF | Buffer regulator supply | Input to internal buffer regulator; provides EMC immunity and dropout protection |
| VREG / VREGA | Internal circuitry supplies | Power rails for digital and analog sections; each requires dedicated 1 μF decoupling capacitor |
| VSS | Internal supply return | Common return for all internal supplies; must connect to BUSRTN |
| PCM | Pulse code modulated output | 4 MHz test signal proportional to acceleration; unused pin must be left open |
Key Features
| Feature | Design Value |
|---|---|
| DSI3 Discovery Mode | Enables physical location identification on multi-node networks without external addressing hardware |
| Background Diagnostic Mode | Performs self-test and sensor health checks concurrently with periodic acceleration data collection |
| Overdamped X-axis sensing element | Damping ratio ζ = 1.26–2.00 ensures minimal resonance amplification in high-vibration environments |
| Fast-start IIR high-pass filter | Eliminates DC drift within milliseconds while preserving dynamic response for crash pulse detection |
| AEC-Q100 qualified | Validated for automotive safety applications including airbag deployment and rollover sensing |
Applications
| Frontal Crash Detection | Rollover Sensing |
|---|---|
Use Scenario: Real-time monitoring of vehicle deceleration during frontal impact to trigger airbag deployment within 20 ms. IC Role / Device Role / Timing Role: Primary X-axis inertial sensor providing signed 10-bit acceleration data via DSI3 Periodic Data Collection Mode at ≤1 ms latency. Use Value: ±250 g range and 16 μs sampling enable accurate capture of peak crash pulses exceeding 100 g without clipping. | Use Scenario: Continuous measurement of lateral and vertical acceleration to detect vehicle instability during sharp turns or off-road maneuvers. IC Role / Device Role / Timing Role: Satellite accelerometer reporting angular rate proxy data through DSI3 Background Diagnostic Mode alongside primary acceleration stream. Use Value: Overdamped mechanical design (ζ ≥ 1.26) suppresses resonant artifacts that could corrupt rollover decision logic. |
| Side-Impact Occupant Classification | Electronic Stability Control (ESC) Feedback |
Use Scenario: Discriminating between occupant presence and seat-belted load using low-level X-axis vibration signatures during vehicle startup. IC Role / Device Role / Timing Role: Secondary X-axis sensor operating in DSI3 Command and Response Mode for on-demand interrogation by ESC controller. Use Value: 1.9456 LSB/g sensitivity and ±1 LSB post-compensation offset support sub-g level discrimination accuracy. | Use Scenario: Providing real-time longitudinal acceleration feedback to ESC system during aggressive braking or acceleration events. IC Role / Device Role / Timing Role: DSI3 slave device delivering interpolated 1 μs timestamped data to master controller for closed-loop traction control. Use Value: Interpolation latency of 16 μs and signal delay <100 μs ensure phase-coherent integration with wheel speed and yaw rate sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inertial sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMA2725W | Same die, rail packaging instead of tape & reel; identical electrical and functional specs | No difference in system integration; only logistics and handling variation | Select MMA2725WR2 for SMT production requiring tape-and-reel delivery; choose MMA2725W for prototyping or low-volume hand-soldering. |
| MMA2712WR2 | ±125 g full-scale range, higher sensitivity (3.8912 LSB/g), same DSI3 interface and package | Better resolution for low-g applications (e.g., tilt sensing), but clips earlier during high-deceleration events | Choose MMA2725WR2 when crash pulse fidelity up to 250 g is required; select MMA2712WR2 where sub-100 g dynamics dominate and resolution is prioritized. |
Compared with MMA2725W, the MMA2725WR2 offers identical performance in tape-and-reel format for automated assembly, while MMA2712WR2 trades full-scale range for enhanced low-g resolution-making the MMA2725WR2 optimal for automotive safety systems demanding robust high-g measurement.
Availability
MMA2725WR2 is available at Aetrix Electronics and suitable for automotive crash sensing, rollover detection, and electronic stability control applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for MMA2725WR2 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
NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips' semiconductor division, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The MMA27XXW family was designed specifically for automotive safety-critical inertial sensing, emphasizing DSI3 interoperability, AEC-Q100 qualification, and robustness against EMC and thermal stress in harsh vehicle environments.
FAQ
What is the full-scale range and sensitivity of the MMA2725WR2?
The MMA2725WR2 has a nominal full-scale range of ±250 g on the X-axis and a sensitivity of 1.9456 LSB/g in 10-bit output mode. This allows it to resolve acceleration changes of approximately 0.514 g per LSB. The device maintains this sensitivity across its specified operating temperature range of -40°C to +125°C, and its digital offset cancellation reduces residual error to ±1 LSB after compensation.
Does the MMA2725WR2 support daisy-chain configuration, and how is it implemented?
Yes, the MMA2725WR2 supports daisy-chain configuration via its BUSSW pin, which drives the gate of an external p-channel FET to connect BUS_I to the next slave device. The BUS_O pin supplies power downstream, and BUSRTN serves as the common return. An external pullup resistor on the FET gate and proper capacitor placement on BUS_O and BUSRTN are required per the application diagram in the MMA27XXW datasheet.
What DSI3 operational modes does the MMA2725WR2 support?
The MMA2725WR2 supports three DSI3 operational modes: Discovery Mode for physical node identification, Command and Response Mode for on-demand configuration and readback, and Periodic Data Collection Mode for continuous acceleration streaming-with Background Diagnostic Mode enabled concurrently. All modes comply with DSI3 Standard Revision 1.0 and operate over the same single-wire BUS_I/BUS_O interface.
Is the MMA2725WR2 qualified for automotive applications, and what standards does it meet?
Yes, the MMA2725WR2 is qualified per AEC-Q100 Revision G for automotive applications and rated for operation from -40°C to +125°C. It meets stringent requirements for electrostatic discharge (±4000 V HBM), mechanical shock (±2000 g), and thermal cycling. Its design targets safety-critical functions such as airbag deployment and electronic stability control in passenger vehicles and commercial transport.
What are the key filtering capabilities of the MMA2725WR2 signal chain?
The MMA2725WR2 features six selectable low-pass filter options (180 Hz to 1200 Hz) and a fast-starting single-pole IIR high-pass filter. The LPF options allow trade-offs between noise suppression and bandwidth for specific use cases-e.g., 180 Hz for crash pulse fidelity or 1200 Hz for high-frequency vibration analysis. The HPF eliminates DC drift within milliseconds while preserving transient response for real-time event detection.
MMA2725WR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MMA
- Package/Case:
- 16-QFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Digital
- Axis:
- X
- Acceleration Range:
- ±250g
- Sensitivity (LSB/g):
- 2.048
- Sensitivity (mV/g):
- -
- Bandwidth:
- -
- Output Type:
- PCM, SPI
- Voltage - Supply:
- 4V ~ 20V
- Features:
- Selectable Low Pass Filter
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (6x6)
MMA2725WR2 FAQ
1.How can I place an order for MMA2725WR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA2725WR2 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 MMA2725WR2 reliable?
The price and inventory of MMA2725WR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA2725WR2 is usually 5 days.
3.What payment methods are accepted for MMA2725WR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA2725WR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA2725WR2?
MMA2725WR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA2725WR2 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 MMA2725WR2?
For technical support, including MMA2725WR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA2725WR2 requirements.
6.How does Aetrix verify that MMA2725WR2 is sourced from the original manufacturer or authorized distributors?
All MMA2725WR2 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 MMA2725WR2 meets industry standards.
7.What is the process for return or replacement of MMA2725WR2?
All MMA2725WR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA2725WR2, 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 MMA2725WR2 part is unused and in its original packaging.
Return procedure for MMA2725WR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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