My Inquiry
My Account
NXP Semiconductors MMA5148LCWR2
- Part No.:
- MMA5148LCWR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-QFN Exposed Pad
- Datasheet:
-
MMA5148LCWR2.pdf
- Description:
- ACCELEROMETER 480G PCM/SPI 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,199
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMA5148LCWR2 from NXP Semiconductors is a Z-axis satellite accelerometer with ±480 g full-scale range, PSI5 Version 1.3 interface compliance, and AEC-Q100 Grade 1 qualification (−40 °C to +125 °C). It delivers 10-bit digital output at 16 μs internal sample rate with interpolation to 1 μs resolution, integrated 400 Hz low-pass filter, and daisy-chain capability via external low-side switch - designed for airbag crash detection in automotive safety systems.
For engineers reviewing the MMA5148LCWR2 datasheet, MMA5148LCWR2 pinout, MMA5148LCWR2 application, or MMA5148LCWR2 equivalent, key selection criteria include PSI5 baud rate (125/190.5 kBaud), programmable time slots (0.5 μs resolution), error detection mode (even parity or 3-bit CRC), and ±480 g overload robustness per AEC-Q100.
Technical Context
The MMA5148LCWR2 implements an overdamped MEMS sensing element (natural frequency 16.289 kHz, damping ratio 1.25) coupled with a ΣΔ ADC and configurable DSP signal chain. Its PSI5 physical layer supports synchronous/asynchronous modes, programmable data length (8/10 bits), and two-wire programming - enabling deterministic timing control in distributed automotive sensor networks.
Internal regulation includes independent analog (VREGA = 2.425–2.575 V) and digital (VREG = 2.425–2.575 V) supplies derived from VBUF (3.60–4.00 V), with low-voltage detection thresholds on all rails (e.g., VCC UV threshold = 3.40–4.00 V) and EMC-immune buffer architecture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Full-Scale Range | ±480 g - enables detection of high-g crash events without clipping up to 2.8 kg mechanical overload (per g-cell limits) |
| PSI5 Interface | Version 1.3 compliant - supports 125/190.5 kBaud, 8/10-bit data, even parity or 3-bit CRC, and optional daisy chain |
| Output Resolution | 10-bit digital output - provides 1 LSB/g sensitivity with ±5% total sensitivity error over temperature |
| Filter Configuration | Selectable 400 Hz, 3-pole or 4-pole LPF - suppresses high-frequency noise while preserving crash pulse fidelity |
| Operating Temperature | −40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood and passenger compartment deployment |
| Package | Pb-free 16-pin QFN, 6 mm × 6 mm × 1.98 mm - surface-mount compatible with automotive reflow profiles |
| Supply Current | 4.0–8.0 mA quiescent, +22–30 mA modulation current - enables low-power wake-up and high-fidelity response during crash |
Pinout & Package
Pb-free 16-pin QFN package, 6 mm × 6 mm × 1.98 mm footprint, exposed thermal pad internally connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | PSI5 Power & Data Line Supply | Connects to PSI5 bus via series resistor; powers device and carries modulated response current |
| IDATA | PSI5 Response Current Modulation | Modulates current onto VCC line for PSI5 communication; supports 125/190.5 kBaud bit timing |
| VBUF | Buffer Regulator Input | Supplies regulated 3.6–4.0 V to internal VREG/VREGA; decoupled with ≥500 nF capacitor to VSS |
| VREG / VREGA | Digital / Analog Supply Outputs | Provide stable 2.425–2.575 V to digital logic and analog front-end; each requires ≥500 nF decoupling to respective ground |
| BUS_SW | Daisy Chain Gate Drive | Drives external N-channel FET gate to enable VSS_OUT connection in multi-sensor daisy chain topology |
| VSS / VSSA | Digital / Analog Ground | Separate return paths prevent noise coupling between digital switching and analog signal chain |
Key Features
| Feature | Design Value |
|---|---|
| PSI5 Daisy Chain Support | Enables up to 3 sensors on single bus using BUS_SW-driven external low-side switch and programmable time slots |
| Fast Startup High-Pass Filter | 0.04 Hz HPF with <200 μs startup - eliminates DC offset while preserving crash transient integrity |
| Self-Test Capability | Active electrostatic self-test generates known acceleration (12 LSB @ ±480 g range); verified via PSI5 response |
| Overdamped Z-Axis Sensing Element | Natural frequency 16.289 kHz, damping ratio 1.25 - suppresses resonance artifacts during high-slew crash events |
| OTP User Programmable Registers | Configurable BAUD, DATASIZE, P_CRC, TIMESLOTx, and LOCK_U via PSI5 - enables field calibration and security locking |
Applications
| Airbag Front Crash Detection | Airbag Side Impact Detection |
|---|---|
Use Scenario: Mounted on vehicle firewall to detect frontal collision deceleration exceeding 20 g within 10 ms. IC Role / Device Role / Timing Role: Z-axis accelerometer providing PSI5-synchronized 10-bit acceleration data at ≤16 μs latency for airbag ECU decision logic. Use Value: ±480 g range prevents saturation during high-speed barrier impacts; AEC-Q100 Grade 1 ensures reliability across thermal cycling and vibration stress. | Use Scenario: Integrated into door module to sense lateral acceleration during side pole impact or T-bone collision. IC Role / Device Role / Timing Role: Satellite sensor transmitting synchronized PSI5 data via daisy chain to central airbag controller. Use Value: BUS_SW pin enables compact multi-sensor daisy chain without additional wiring; 0.5 μs time slot resolution ensures deterministic channel allocation. |
| Seat Belt Pretensioner Activation | Occupant Classification System |
Use Scenario: Mounted near B-pillar to trigger pretensioner within 25 ms of crash onset based on Z-axis jerk profile. IC Role / Device Role / Timing Role: High-bandwidth inertial sensor feeding real-time acceleration derivative (jerk) to pretensioner control algorithm. Use Value: 400 Hz LPF preserves crash pulse rise time (<2.5 ms) while rejecting road noise; 16 μs internal sampling enables accurate jerk calculation. | Use Scenario: Embedded in seat structure to distinguish adult vs. child occupant via low-g motion signature analysis. IC Role / Device Role / Timing Role: Low-noise Z-axis transducer delivering 10-bit output with RMS noise ≤1.0 LSB (1 Hz–1 kHz) for occupancy classification. Use Value: 0.04 Hz HPF removes seat flexure drift; ±480 g range accommodates aggressive seat adjustment without clipping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inertial sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMA5148LCW | Tubes packaging only; identical electrical and functional specs to MMA5148LCWR2 | Not suitable for automated SMT assembly; requires manual loading or tube-to-tape conversion | Select MMA5148LCWR2 for pick-and-place production; choose MMA5148LCW only for prototyping or low-volume hand-soldered builds |
| ADXL313WBRMZ-RL | I²C/SPI interface, ±400 g range, 13-bit resolution, no PSI5 support, different package (10-lead LFCSP) | Requires host microcontroller with I²C/SPI; lacks automotive PSI5 network integration and AEC-Q100 Grade 1 certification | Use ADXL313WBRMZ-RL only in non-automotive industrial or consumer applications where PSI5 is not required |
Compared with MMA5148LCW and ADXL313WBRMZ-RL, the MMA5148LCWR2 uniquely combines AEC-Q100 Grade 1 qualification, PSI5 v1.3 compliance, ±480 g range, and tape-and-reel packaging - making it the only drop-in solution for high-volume automotive airbag ECU designs requiring deterministic network timing and zero-layout change migration from other MMA51xxL variants.
Availability
MMA5148LCWR2 is available at Aetrix Electronics and suitable for automotive airbag systems, seat belt pretensioner modules, and occupant classification subsystems requiring stable component supply across extended product lifecycles.
Supply support for MMA5148LCWR2 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The MMA51xxL product line delivers SafeAssure-certified PSI5 accelerometers optimized for automotive crash detection - engineered to meet stringent AEC-Q100 reliability requirements and integrate seamlessly into distributed sensor networks.
FAQ
What is the full-scale range and sensitivity of the MMA5148LCWR2?
The MMA5148LCWR2 has a full-scale range of ±480 g and delivers 10-bit digital output with nominal sensitivity of 1 LSB/g. Total sensitivity error is ±5% over temperature (−40 °C to +125 °C), and system output noise is ≤1.0 LSB RMS (1 Hz–1 kHz). The device uses an overdamped MEMS element with natural frequency of 16.289 kHz and damping ratio of 1.25 to ensure stable response under high-slew crash conditions. This specification set makes MMA5148LCWR2 suitable for high-g automotive crash detection where signal fidelity and overload margin are critical.
How does the PSI5 interface of the MMA5148LCWR2 operate in daisy-chain mode?
The MMA5148LCWR2 supports PSI5 daisy chaining via its BUS_SW pin, which drives the gate of an external N-channel MOSFET to connect VSS to VSS_OUT. When enabled, multiple MMA5148LCWR2 devices share one PSI5 bus using programmable time slots (0.5 μs resolution) and configurable baud rates (125/190.5 kBaud). Each device responds in its assigned slot, eliminating contention. The MMA5148LCWR2 implements PSI5 Version 1.3 compliance including even parity or 3-bit CRC error detection, and supports both synchronous and asynchronous modes. This architecture allows scalable deployment of up to three sensors per bus without additional wiring harness complexity.
What are the power supply requirements and regulation architecture of the MMA5148LCWR2?
The MMA5148LCWR2 requires a single 4.2–17.0 V supply on VCC, from which it derives internal regulated voltages: VBUF (3.60–4.00 V), VREG (2.425–2.575 V), and VREGA (2.425–2.575 V). VBUF feeds both VREG and VREGA regulators, providing EMC immunity and supply dropout resilience. Each regulator requires ≥500 nF ceramic decoupling capacitance to its respective ground (VSS or VSSA). Low-voltage detection thresholds are implemented on all rails (e.g., VCC UV threshold = 3.40–4.00 V), ensuring safe operation during brown-out conditions. Quiescent current is 4.0–8.0 mA, rising to +22–30 mA during PSI5 modulation - a design optimized for low-power standby and high-fidelity crash response.
Can the MMA5148LCWR2 be programmed in-system, and what configuration options are available?
Yes, the MMA5148LCWR2 supports in-system programming via its PSI5 interface using two-wire programming mode. User-accessible OTP registers (DEVCFG2–DEVCFG8) allow configuration of BAUD rate (125/190.5 kBaud), DATASIZE (8/10 bits), P_CRC (even parity or 3-bit CRC), TIMESLOTx (0x000–0x3FF, 0.5 μs resolution), and LOCK_U to permanently disable further writes. Factory-programmed registers (DEVCFG1) define axis (Z), range (±480 g), and serial number. Programming is performed using standard PSI5 "Execute Programming of NVM" commands, with built-in OTP error detection. This enables field calibration, security locking, and variant differentiation without hardware changes - a key advantage for automotive Tier 1 suppliers managing multiple vehicle platforms.
What is the operating temperature range and qualification status of the MMA5148LCWR2?
The MMA5148LCWR2 is qualified per AEC-Q100 Revision G, Grade 1, with guaranteed operation from −40 °C to +125 °C ambient temperature. This qualification includes stress testing for thermal cycling, humidity, mechanical shock (±2000 g powered, ±2500 g unpowered), and electrostatic discharge (±4000 V HBM). The device's internal architecture - including separate analog/digital grounds (VSSA/VSS), buffered regulation (VBUF), and overdamped MEMS element - is specifically designed to maintain parameter stability across this full automotive temperature range. Its 6 mm × 6 mm QFN package meets lead-free reflow profiles and supports long-term reliability in under-hood and passenger compartment environments where MMA5148LCWR2 is deployed for airbag and safety-critical functions.
MMA5148LCWR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MMA
- Package/Case:
- 16-QFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Digital
- Axis:
- Z
- 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-QFN (6x6)
MMA5148LCWR2 FAQ
1.How can I place an order for MMA5148LCWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA5148LCWR2 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 MMA5148LCWR2 reliable?
The price and inventory of MMA5148LCWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA5148LCWR2 is usually 5 days.
3.What payment methods are accepted for MMA5148LCWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA5148LCWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA5148LCWR2?
MMA5148LCWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA5148LCWR2 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 MMA5148LCWR2?
For technical support, including MMA5148LCWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA5148LCWR2 requirements.
6.How does Aetrix verify that MMA5148LCWR2 is sourced from the original manufacturer or authorized distributors?
All MMA5148LCWR2 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 MMA5148LCWR2 meets industry standards.
7.What is the process for return or replacement of MMA5148LCWR2?
All MMA5148LCWR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA5148LCWR2, 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 MMA5148LCWR2 part is unused and in its original packaging.
Return procedure for MMA5148LCWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMA5148LCWR2 Tags
-
MXC4005XC
Memsic Inc.
-
MC3419
Memsic Inc.
-
MC3479
Memsic Inc.
-
MXC6655XA
Memsic Inc.
-
MC3630
Memsic Inc.
.jpg)
-
LIS2HH12TR
STMicroelectronics
-
KX122-1037
Kionix Inc.
-
LIS2DE12TR
STMicroelectronics
-
LIS2DH12TR
STMicroelectronics
-
MC3635
Memsic Inc.
-
LIS2DS12TR
STMicroelectronics
-
LIS3DHTR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
