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NXP Semiconductors MMA5248LW
- Part No.:
- MMA5248LW
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-VFLGA
- Datasheet:
-
MMA5248LW.pdf
- Description:
- ACCELEROMETER 480G PCM/SPI 16LGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,067
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Product details
Overview
MMA5248LW from NXP Semiconductors (formerly Freescale) is a PSI5-compliant, X-axis satellite accelerometer designed for automotive airbag crash detection systems. It delivers ±480g full-scale range, 10-bit digital output with ≤±7% total sensitivity error, and operates across -40°C to +125°C per AEC-Q100 Grade 1. Its overdamped g-cell (ζ = 1.26) and 26 kHz natural frequency enable high-fidelity crash pulse capture in front/side impact sensing.
For engineers reviewing the MMA5248LW datasheet, MMA5248LW pinout, MMA5248LW application, or MMA5248LW equivalent, this page provides verified PSI5 timing parameters (125/190.5 kBaud), daisy-chain configuration details, low-pass filter options (400 Hz, 4-pole), internal 4 MHz oscillator specs, and validated AEC-Q100 qualification evidence - all critical for safety-critical automotive sensor integration.
Technical Context
The MMA5248LW implements a ΣΔ ADC with SINC filtering, followed by programmable IIR low-pass (400 Hz, 4-pole) and single-pole high-pass filters with fast startup. Its PSI5 v1.3 interface supports synchronous/asynchronous modes, 8- or 10-bit data length, and 3-bit CRC or even parity error detection.
Internally regulated supplies include VBUF (3.6–4.0 V), VREG (2.425–2.575 V digital), and VREGA (2.425–2.575 V analog), each requiring external decoupling capacitors. The device uses OTP-programmable registers for time slot assignment (0.5 μs resolution), baud rate selection, and daisy-chain control via BUS_SW gate drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±480g - Enables detection of high-deceleration side-impact and rollover events without clipping. |
| Output Resolution | 10-bit digital output - Provides 1 LSB/g sensitivity at ±480g range for precise acceleration quantization. |
| PSI5 Compliance | PSI5 v1.3, P10P-500/3L - Ensures interoperability with standard automotive PSI5 master controllers and daisy-chain topologies. |
| Filter Configuration | Selectable 400 Hz, 4-pole LPF - Suppresses high-frequency noise while preserving crash pulse fidelity up to 200 Hz. |
| Operating Temperature | -40°C to +125°C (AEC-Q100 Grade 1) - Validated for under-hood and passenger compartment deployment. |
| Internal Oscillator | 4.0 MHz ±5% - Drives all timing-critical functions including interpolation, filtering, and PSI5 bit timing. |
| Supply Architecture | VBUF-regulated VREG/VREGA - Isolates analog/digital domains for EMC robustness and supply dropout immunity. |
Pinout & Package
Pb-free 16-pin QFN package (Case 2086-01, 6 mm × 6 mm, 0.5 mm pitch) with exposed thermal pad internally connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | PSI5 Power & Data Line Supply | Supplies device via resistor-limited PSI5 bus; requires 2.2 nF decoupling to VSS. |
| IDATA | PSI5 Response Current Modulator | Modulates current on PSI5 line for digital communication; supports 125/190.5 kBaud. |
| VBUF | Buffer Regulator Input | Feeds internal regulators (VREG/VREGA); requires 500–1500 nF capacitor to VSS for stability. |
| BUS_SW | Daisy-Chain Low-Side Switch Driver | Drives external N-MOSFET gate to enable VSS_OUT connection in multi-sensor chains. |
| VREG / VREGA | Digital / Analog Core Supplies | Require 1 μF X7R ceramic caps to VSS/VSSA; monitored for undervoltage lockout (2.15 V threshold). |
| VSS / VSSA | Digital / Analog Ground | Separate return paths prevent noise coupling; corner pads tied to VSS for thermal conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Overdamped X-axis g-cell (ζ = 1.26) | Eliminates resonance-induced measurement artifacts during high-slew crash events. |
| Programmable PSI5 time slots (0.5 μs resolution) | Enables deterministic multi-sensor scheduling on shared bus without arbitration delays. |
| Two-wire programming mode | Allows field reconfiguration of baud rate, data length, and error detection without SPI hardware. |
| Internal 16 μs sample rate with 1 μs interpolation | Delivers sub-microsecond timestamp resolution for precise crash pulse edge detection. |
| Self-test with calibrated output (112 LSB @ ±480g) | Validates sensor functionality and signal chain integrity during power-on or periodic diagnostics. |
Applications
| Airbag Front Crash Detection | Airbag Side Impact Detection |
|---|---|
Use Scenario: Mounted on vehicle firewall or B-pillar to detect rapid longitudinal deceleration during frontal collisions. IC Role / Device Role / Timing Role: Primary X-axis acceleration transducer feeding PSI5 data stream to airbag control unit (ACU) with <100 μs latency. Use Value: ±480g range captures severe crashes without saturation; 4-pole LPF rejects road noise while preserving 0–200 Hz crash signature. |
Use Scenario: Integrated into door module or seat structure to sense lateral acceleration during T-bone or side-swipe impacts. IC Role / Device Role / Timing Role: Satellite accelerometer in daisy-chained PSI5 network, using BUS_SW to isolate faulty nodes. Use Value: Overdamped response prevents false triggers from door slam or suspension bounce; AEC-Q100 Grade 1 ensures reliability at cabin temperatures. |
| Rollover Detection System | Occupant Position Sensing |
Use Scenario: Mounted near vehicle center of gravity to monitor angular acceleration during potential rollover events. IC Role / Device Role / Timing Role: High-bandwidth inertial sensor providing real-time X-axis data for roll-rate estimation algorithms. Use Value: 26 kHz g-cell resonance and 1 μs interpolation support accurate derivative-based roll calculations; 125 kBaud PSI5 enables low-latency streaming. |
Use Scenario: Embedded in seatback to detect occupant presence, posture, and movement relative to airbag deployment zone. IC Role / Device Role / Timing Role: Low-noise acceleration monitor feeding occupancy classification logic in ACU via PSI5. Use Value: 1.0 LSB RMS noise (1–1 kHz) enables discrimination of subtle occupant motion; programmable HPF removes seat vibration artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PSI5 accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP MMA5224LW | ±240g full-scale range; lower sensitivity (2 LSB/g), reduced g-cell clipping margin (2300g vs 2065g). | Suitable for less severe crash environments; lower system cost where ±240g suffices. | Select when crash pulse amplitudes are consistently below ±200g and cost optimization is prioritized. |
| Infineon KMR2200 | PSI5 v1.3 compliant but uses different internal architecture (capacitive sensing, no ΣΔ ADC); ±200g range. | Lacks daisy-chain BUS_SW driver; requires external switch for multi-node configurations. | Choose for legacy Infineon ecosystem compatibility or where integrated self-test differs in diagnostic coverage. |
Compared with MMA5224LW and KMR2200, the MMA5248LW offers the highest full-scale range (±480g) and integrated daisy-chain control, making it optimal for high-deceleration side-impact and rollover detection where headroom and bus topology flexibility are critical.
Availability
MMA5248LW is available at Aetrix Electronics and suitable for automotive airbag systems, rollover detection modules, and occupant position sensing applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MMA5248LW 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 leader focused on secure connectivity solutions for automotive, industrial, and IoT markets.
The MMA5248LW belongs to NXP's Xtrinsic inertial sensor family, engineered specifically for functional-safety-critical automotive applications demanding PSI5 compliance, AEC-Q100 qualification, and robust crash pulse fidelity.
FAQ
What is the full-scale range and sensitivity of the MMA5248LW?
The MMA5248LW has a factory-set full-scale range of ±480g. Its sensitivity is 1 LSB/g in 10-bit output mode, with total sensitivity error bounded at ±7% across temperature and supply voltage. This is confirmed in Table 52 of the datasheet, where SENS = 1 LSB/g for the ±480g variant, and ΔSENS_480 = ±7% under specified operating conditions.
Does the MMA5248LW support daisy-chain configuration, and how is it implemented?
Yes, the MMA5248LW supports optional daisy chaining via the BUS_SW pin (Pin 15), which drives the gate of an external N-channel MOSFET to connect VSS to VSS_OUT. This enables multi-sensor sharing of a single PSI5 bus. Configuration is controlled through OTP registers DEVCFG2 and DEVCFG6, and is explicitly documented in Section 3.1.3.3 and Figure 1 of the datasheet.
What PSI5 communication parameters does the MMA5248LW support?
The MMA5248LW supports PSI5 v1.3 at two baud rates (125 kBaud and 190.5 kBaud), selectable data lengths (8 or 10 bits), and error detection options (even parity or 3-bit CRC). Time slot assignment is programmable with 0.5 μs resolution, and both synchronous and asynchronous modes are supported - all detailed in the "PSI5 Version 1.3 Compatible" feature list and Section 2.6.
How is the MMA5248LW qualified for automotive use?
The MMA5248LW is qualified to AEC-Q100 Revision G, Grade 1, covering operation from -40°C to +125°C ambient. It meets electrostatic discharge requirements (±4000 V HBM), unpowered shock tolerance (±2500 g), and thermal resistance (θJC = 2.5 °C/W). These qualifications are stated on page 1 and verified in Sections 2.1–2.5 of the datasheet.
What are the key power supply requirements for the MMA5248LW?
The MMA5248LW requires three regulated supplies: VBUF (3.6–4.0 V, 500–1500 nF cap), VREG (2.425–2.575 V digital, 1 μF cap to VSS), and VREGA (2.425–2.575 V analog, 1 μF cap to VSSA). Undervoltage detection thresholds are 3.40 V (VCC), 2.95 V (VBUF), and 2.15 V (VREG/VREGA), with hysteresis to prevent chatter.
MMA5248LW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MMA
- Package/Case:
- 16-VFLGA
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- Type:
- Digital
- Axis:
- X
- Acceleration Range:
- ±480g
- Sensitivity (LSB/g):
- 1
- Sensitivity (mV/g):
- -
- Bandwidth:
- -
- Output Type:
- PCM, SPI
- Voltage - Supply:
- 4.2V ~ 17V
- Features:
- Selectable Low Pass Filter
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LGA (3x3)
MMA5248LW FAQ
1.How can I place an order for MMA5248LW through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA5248LW 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 MMA5248LW reliable?
The price and inventory of MMA5248LW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA5248LW is usually 5 days.
3.What payment methods are accepted for MMA5248LW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA5248LW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA5248LW?
MMA5248LW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA5248LW 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 MMA5248LW?
For technical support, including MMA5248LW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA5248LW requirements.
6.How does Aetrix verify that MMA5248LW is sourced from the original manufacturer or authorized distributors?
All MMA5248LW 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 MMA5248LW meets industry standards.
7.What is the process for return or replacement of MMA5248LW?
All MMA5248LW units undergo pre-shipment inspection (PSI). If there is an issue with MMA5248LW, 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 MMA5248LW part is unused and in its original packaging.
Return procedure for MMA5248LW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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