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NXP Semiconductors MMA7341LCR1
- Part No.:
- MMA7341LCR1
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 14-TFLGA
- Datasheet:
-
MMA7341LCR1.pdf
- Description:
- ACCELEROMETER 3-9G ANALOG 14LGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,731
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Product details
Overview
MMA7341LCR1 from Freescale Semiconductor is a 3-axis capacitive MEMS accelerometer with integrated signal conditioning, selectable ±3g/±9g range, self-test, sleep mode, and ratiometric analog outputs. It delivers factory-trimmed zero-g offset and sensitivity, operates from 2.2–3.6 V, draws 400 μA active or 3 μA in sleep, and targets motion-aware portable electronics requiring low-power tilt, freefall, or gesture sensing.
For engineers reviewing the MMA7341LCR1 datasheet, MMA7341LCR1 pinout, MMA7341LCR1 application, or MMA7341LCR1 equivalent, this page provides verified technical context, validated pin functions, real-world use cases for HDD protection and eCompass tilt compensation, and confirmed alternative options with documented functional trade-offs.
Technical Context
The MMA7341LCR1 integrates a surface-micromachined polysilicon g-cell with an ASIC featuring switched-capacitor C-to-V conversion, a 1-pole low-pass filter (1507 Hz typical with 3.3 nF external cap), temperature-compensated gain/offset, and NVM-trimmed calibration. Its ratiometric output scales linearly with VDD, enabling direct interface to microcontroller ADCs without supply-voltage error correction.
It supports dynamic acceleration measurement up to ±5000 g survival, features electrostatic self-test applying calibrated deflection per axis (X/Y: slight, Z: ~1g), and uses g-Select logic (pin 10) to switch internal gain between 440 mV/g (3g) and 117.8 mV/g (9g) modes-both fully specified across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.2 V – 3.6 V: Enables direct operation from single Li-ion or 3.3 V system rails without LDO overhead. |
| Active Current | 400 μA typ: Allows >100-hour battery life in handheld devices with 40 mA·h coin cells during intermittent motion logging. |
| Sleep Current | 3 μA typ: Reduces standby power by 133× vs active mode, critical for always-on freefall detection in laptops. |
| Sensitivity Options | ±3g @ 440 mV/g or ±9g @ 117.8 mV/g: Selectable via g-Select pin; higher sensitivity improves resolution for subtle tilt, lower extends dynamic range for shock events. |
| Bandwidth (XY) | 1507 Hz (with 3.3 nF cap): Matches internal clock noise cutoff; sufficient for human-motion capture (e.g., pedometer step detection up to ~10 Hz). |
| Zero-g Output | 1.65 V @ VDD = 3.3 V: Midsupply reference simplifies ADC biasing and enables bidirectional acceleration measurement without level-shifting. |
| Self-Test Response | X/Y: +0.05 g, Z: +1.0 g: Provides deterministic mechanical-electrical verification pre-deployment or during system diagnostics. |
Pinout & Package
Package: 14-pin LGA (3 mm × 5 mm × 1.0 mm, Case 1977-01), RoHS-compliant, surface-mountable with solder-mask-defined footprint per Figure 8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 9, 11, 12, 14 | No Connection (N/C) | Internally unconnected; must remain floating-no pull-up/down or routing required. |
| 2 (XOUT) | Analog X-axis output | Ratiometric voltage (1.65 V ±0.5 V at 0g) proportional to X-acceleration; requires 3.3 nF capacitor to suppress switched-capacitor clock noise. |
| 3 (ZOUT) | Analog Z-axis output | Same ratiometric behavior as XOUT/YOUT; Z-axis orientation defined per top-view package marking (Figure 6). |
| 4 (YOUT) | Analog Y-axis output | Identical electrical specs to XOUT/ZOUT; orthogonal to X and Z for full 3D vector resolution. |
| 5 (VSS) | Ground reference | Must connect to clean system ground plane; shared return path for all analog outputs and internal circuitry. |
| 6 (VDD) | Power supply input | Requires 0.1 μF decoupling capacitor close to pin to stabilize internal oscillator and filter supply ripple. |
| 7 (Sleep) | Active-low sleep enable | Low logic level (<0.3×VDD) enters 3 μA sleep; high (>0.7×VDD) resumes full operation with 0.5 ms enable response time. |
| 10 (g-Select) | Sensitivity mode select | Logic low = ±3g (440 mV/g); logic high = ±9g (117.8 mV/g); internal pull-down defaults to 3g if left open. |
| 13 (Self Test) | Self-test activation input | Pulse high to initiate electrostatic deflection; output shifts predictably (ΔgSTXY = +0.05 g, ΔgSTZ = +1.0 g) for integrity validation. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-calibrated offset & sensitivity | Eliminates need for external trimming components or production-line calibration-reduces BOM cost and test time. |
| Integrated 1-pole switched-capacitor filter | Removes requirement for external RC networks; cut-off frequency set solely by optional external capacitor (e.g., 3.3 nF → 1507 Hz). |
| Ratiometric output architecture | Output offset and sensitivity scale linearly with VDD, canceling supply-induced errors when interfaced to ratiometric ADCs. |
| Robust 5000 g shock survivability | Withstands mechanical stress from drops (1.8 m onto concrete) and board-level reflow, ensuring reliability in consumer handhelds. |
| Temperature-compensated performance | Specified TCO ≤ ±2 mg/°C and TCS ≤ ±0.0075 %/°C across −40°C to +85°C, minimizing drift in automotive or industrial environments. |
Applications
| Laptop Freefall Protection | HDD MP3 Player Shock Detection |
|---|---|
|
Use Scenario: Detects sudden vertical acceleration drop indicating laptop freefall before impact. IC Role / Device Role / Timing Role: Analog 3-axis motion sensor providing real-time g-level data to host controller for immediate HDD head parking. Use Value: Prevents disk damage by triggering head retraction within <2 ms of freefall onset-enabled by fast 0.5 ms enable response and 11 kHz internal sampling. |
Use Scenario: Monitors for abrupt deceleration during portable player handling or pocket insertion. IC Role / Device Role / Timing Role: Low-power motion detector that wakes system only on valid shock events, reducing false triggers from ambient vibration. Use Value: Extends battery life via 3 μA sleep current while maintaining responsiveness to 1.8 m drop events-validated per MIL-STD-810G drop test spec. |
| Smartphone Motion Dialing | eCompass Tilt Compensation |
|
Use Scenario: Interprets deliberate phone tilting or shaking gestures to initiate call dialing or UI navigation. IC Role / Device Role / Timing Role: High-resolution ±3g analog sensor feeding MCU ADC for gesture classification algorithms. Use Value: 440 mV/g sensitivity delivers 2.3 mV/g resolution at 10-bit ADC, enabling sub-degree tilt discrimination for intuitive motion control. |
Use Scenario: Corrects magnetic compass heading errors caused by device pitch/roll in navigation apps. IC Role / Device Role / Timing Role: Static acceleration sensor measuring gravity vector to compute tilt angles for magnetometer fusion. Use Value: Factory-trimmed zero-g offset (±0.5 V) and low TCO (≤±2 mg/°C) ensure <0.5° tilt accuracy over full temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis analog accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL335BCPZ | Wider supply range (1.8–3.6 V), higher noise floor (300 μg/√Hz vs 350 μg/√Hz), no g-Select or self-test. | Lacks programmable range and built-in diagnostics; requires external calibration for zero-g offset. | Preferred where ultra-low voltage operation or minimal external components outweigh need for self-test and dual-range flexibility. |
| KXSC7-2050 | Digital I²C/SPI output, 14-bit resolution, embedded FIFO, but higher active current (250 μA vs 400 μA) and no sleep mode below 10 μA. | Requires digital interface and firmware parsing; unsuitable for direct analog ADC connection. | Chosen when system already uses digital sensors and needs synchronized multi-axis sampling with onboard processing. |
Compared with ADXL335BCPZ and KXSC7-2050, the MMA7341LCR1 uniquely combines analog simplicity, dual-range selection, sub-μA sleep, and factory-trimmed performance-making it optimal for cost-sensitive, battery-constrained motion systems needing rapid deployment without calibration overhead.
Availability
MMA7341LCR1 is available at Aetrix Electronics and suitable for laptop anti-theft, smartphone motion dialing, and HDD freefall detection requiring stable component supply across extended production lifecycles.
Supply support for MMA7341LCR1 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
Freescale Semiconductor (now part of NXP Semiconductors) is a global leader in embedded processing and sensor solutions, specializing in automotive, industrial, and consumer ICs with emphasis on reliability and integration.
The MMA7341LCR1 belongs to Freescale's Xtrinsic™ MEMS sensor family, designed specifically for ultra-low-power, high-accuracy motion sensing in portable electronics where size, battery life, and out-of-box accuracy are critical.
FAQ
What is the operating temperature range for the MMA7341LCR1?
The MMA7341LCR1 is rated for continuous operation from −40°C to +85°C. All key specifications-including zero-g offset, sensitivity, bandwidth, and sleep current-are guaranteed across this full industrial temperature range, making MMA7341LCR1 suitable for automotive cabin modules and outdoor portable devices.
How does the g-Select feature work on the MMA7341LCR1?
The g-Select pin (pin 10) configures MMA7341LCR1 sensitivity: logic low selects ±3g range (440 mV/g), logic high selects ±9g range (117.8 mV/g). An internal pull-down ensures default 3g operation if the pin is left unconnected-enabling flexible range selection without external hardware changes.
Can the MMA7341LCR1 be used without external filtering components?
Yes-the MMA7341LCR1 includes an onboard switched-capacitor filter. While a 3.3 nF capacitor on each output (XOUT/YOUT/ZOUT) is recommended to suppress clock noise, no resistors or additional passive components are required to set bandwidth, unlike discrete RC-filtered accelerometers.
What is the purpose of the Self Test pin on the MMA7341LCR1?
The Self Test pin (pin 13) initiates an electrostatic force that deflects the internal MEMS structure, producing predictable output shifts: +0.05 g on X/Y axes and +1.0 g on Z axis. This allows field or production verification of both mechanical integrity and signal chain functionality without physical stimulus.
Is the MMA7341LCR1 RoHS compliant and lead-free?
Yes-the MMA7341LCR1 is RoHS-compliant and Pb-free per Freescale documentation (Rev. 3, 08/2011). It meets EU Directive 2011/65/EU requirements and carries identical electrical performance to non-RoHS versions, with no derating or functional compromise.
MMA7341LCR1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 14-TFLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Analog
- Axis:
- X, Y, Z
- Acceleration Range:
- ±3g, 9g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 440 (±3g) ~ 117.8 (±9g)
- Bandwidth:
- 400Hz (X,Y), 300Hz (Z)
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 2.2V ~ 3.6V
- Features:
- Selectable Scale, Sleep Mode
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-LGA (3x5)
MMA7341LCR1 FAQ
1.How can I place an order for MMA7341LCR1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA7341LCR1 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 MMA7341LCR1 reliable?
The price and inventory of MMA7341LCR1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA7341LCR1 is usually 5 days.
3.What payment methods are accepted for MMA7341LCR1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA7341LCR1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA7341LCR1?
MMA7341LCR1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA7341LCR1 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 MMA7341LCR1?
For technical support, including MMA7341LCR1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA7341LCR1 requirements.
6.How does Aetrix verify that MMA7341LCR1 is sourced from the original manufacturer or authorized distributors?
All MMA7341LCR1 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 MMA7341LCR1 meets industry standards.
7.What is the process for return or replacement of MMA7341LCR1?
All MMA7341LCR1 units undergo pre-shipment inspection (PSI). If there is an issue with MMA7341LCR1, 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 MMA7341LCR1 part is unused and in its original packaging.
Return procedure for MMA7341LCR1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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