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NXP Semiconductors MMA7361LCR2
- Part No.:
- MMA7361LCR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 14-TFLGA
- Datasheet:
-
MMA7361LCR2.pdf
- Description:
- ACCEL 1.5-6G ANALOG 14LGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,340
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Product details
Overview
MMA7361LCR2 from Freescale Semiconductor is a surface-micromachined capacitive 3-axis accelerometer with integrated signal conditioning, selectable ±1.5g/±6g ranges, 0g-detect for freefall protection, self-test capability, and sleep mode (3 μA). It delivers ratiometric analog outputs (XOUT/YOUT/ZOUT), operates from 2.2 V to 3.6 V, and is used in HDD drop protection, laptop anti-theft, and motion-enabled mobile interfaces.
For engineers reviewing the MMA7361LCR2 datasheet, MMA7361LCR2 pinout, MMA7361LCR2 application, or MMA7361LCR2 equivalent, key selection considerations include its LGA-14 package footprint, g-select logic-controlled sensitivity switching, 0g-detect digital output timing, and low-power sleep activation via pin 7 - all critical for battery-powered motion-sensing designs.
Technical Context
The MMA7361LCR2 integrates a polysilicon MEMS g-cell with an ASIC using switched-capacitor measurement, temperature-compensated offset/sensitivity trimming, and a single-pole switched-capacitor low-pass filter (no external components required). Its ratiometric output scales linearly with VDD, enabling direct interfacing with microcontroller ADCs without supply-induced error compensation.
It features dedicated digital logic outputs: pin 9 (0g-Detect) asserts high when all axes read near 0g, and pin 13 (Self Test) triggers electrostatic deflection of internal beams for mechanical/electrical integrity verification. Sensitivity selection (pin 10) configures internal gain to deliver either 800 mV/g (±1.5g) or 206 mV/g (±6g), with factory pull-down defaulting to 1.5g mode if left unconnected.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.2 V – 3.6 V - Enables operation from single Li-ion or regulated 3.3 V rails without level-shifting. |
| Operating Current | 400 μA typical - Supports >100-hour runtime on 40 mAh coin cell in active mode. |
| Sleep Current | 3 μA typical - Reduces power by >99% during idle periods; activated by low logic on pin 7. |
| Sensitivity Options | ±1.5g @ 800 mV/g or ±6g @ 206 mV/g - Configurable via pin 10; higher range trades resolution for extended dynamic range. |
| 0g-Detect Output | Digital logic high when |X|, |Y|, |Z| < 0.4 g - Directly drives MCU interrupt pins for freefall event capture. |
| Bandwidth (XY) | 400 Hz typical - Sufficient for human-motion detection (e.g., pedometer, tilt UI) without aliasing at 11 kHz internal sampling. |
| Enable Response Time | 0.5 ms - Ensures rapid wake-up from sleep for responsive motion-triggered actions. |
Pinout & Package
Package: 3 mm × 5 mm × 1.0 mm LGA-14 (Case 1977-01), RoHS-compliant, surface-mountable with solder-mask-defined footprint per AN3484.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 11, 12, 14 | No Connection | Internally unconnected; must remain floating or grounded per layout guidelines - no routing or vias. |
| 2 (XOUT) | Analog Output (X-axis) | Ratiometric voltage (1.65 V at 0g); requires 3.3 nF capacitor to suppress switched-capacitor clock noise. |
| 3 (ZOUT) | Analog Output (Z-axis) | Same ratiometric behavior as XOUT/YOUT; polarity inverted relative to gravity orientation per Figure 6. |
| 4 (YOUT) | Analog Output (Y-axis) | Full-scale range = VDD ± 0.1 V; output impedance = 32 kΩ - mandates ≥10 MΩ input impedance for A/D. |
| 5 (VSS) | Ground Reference | Must connect to solid ground plane beneath device; decoupled with 0.1 μF capacitor near pin 6. |
| 6 (VDD) | Power Input | Supplies both MEMS cell and ASIC; noise-sensitive - requires local 0.1 μF ceramic decoupling. |
| 7 (Sleep) | Active-Low Enable | Pull low to enter 3 μA sleep; pull high for normal operation - compatible with standard GPIO drive. |
| 9 (0g-Detect) | Digital Output | Open-drain or CMOS-compatible; asserts high when all axes within ±0.4 g - used for freefall interrupts. |
| 10 (g-Select) | Sensitivity Control | Logic low = ±1.5g (800 mV/g); logic high = ±6g (206 mV/g); internal pull-down defaults to 1.5g. |
| 13 (Self Test) | Test Activation | Pulse high to initiate electrostatic beam deflection; verifies mechanical response and signal chain integrity. |
Key Features
| Feature | Design Value |
|---|---|
| 0g-Detect Logic Output | Enables immediate system-level freefall response (e.g., HDD head retraction) without software polling or threshold calculation. |
| Selectable Sensitivity (g-Select) | Hardware-configurable range allows one BOM to support both high-resolution (1.5g) and high-dynamic-range (6g) use cases. |
| Integrated Signal Conditioning | Eliminates need for external op-amps or filters - full analog signal path (gain, temp-comp, LPF) is monolithic. |
| Sleep Mode Power Reduction | Reduces current from 400 μA to 3 μA - extends battery life in always-on motion-aware devices like wearables or remote controls. |
| Ratiometric Output Architecture | Output offset and sensitivity scale linearly with VDD, removing supply-voltage drift errors in ADC-based systems. |
Applications
| Laptop Freefall Protection | HDD MP3 Player Drop Detection |
|---|---|
|
Use Scenario: Laptop detects sudden vertical acceleration loss during accidental drop. IC Role / Device Role / Timing Role: MMA7361LCR2 monitors Z-axis acceleration; 0g-Detect pin asserts within <2 ms of freefall onset. Use Value: Triggers immediate HDD head parking before impact - prevents disk damage in <1.8 m drop tests. |
Use Scenario: Portable music player experiences abrupt deceleration during pocket or bag drop. IC Role / Device Role / Timing Role: MMA7361LCR2's 0g-Detect output signals MCU to halt motor and buffer audio. Use Value: Prevents mechanical shock damage to flash memory controller and audio DAC during 1.8 m concrete drop. |
| Smartphone Motion UI | Pedometer Step Counting |
|
Use Scenario: User tilts phone to scroll text or rotate game view in real time. IC Role / Device Role / Timing Role: MMA7361LCR2 provides continuous analog X/Y/Z outputs sampled at ≥100 Hz by MCU ADC. Use Value: 400 Hz XY bandwidth and 800 mV/g sensitivity enable sub-degree tilt resolution for smooth UI responsiveness. |
Use Scenario: Wearable device detects vertical hip acceleration peaks during walking/running. IC Role / Device Role / Timing Role: MMA7361LCR2 operates in ±1.5g mode with 0.5 ms wake-up to capture transient step events. Use Value: Low 3 μA sleep current enables multi-day battery life while maintaining motion-triggered wake capability. |
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 |
|---|---|---|---|
| ADXL335BCPZ | Fixed ±3g range; no 0g-detect or sleep mode; higher noise floor (300 μg/√Hz vs. 350 μg/√Hz). | Lacks hardware freefall interrupt - requires firmware thresholding and increases MCU load. | Choose ADXL335BCPZ only if fixed 3g range suffices and system-level power budget permits ~350 μA continuous draw. |
| KXSC7-2050 | ±2g/±4g/±8g programmable via I²C; includes FIFO and interrupt registers; 2.5 μA sleep current. | Digital interface adds complexity but enables advanced features (tap detection, orientation lock) not in MMA7361LCR2. | Choose KXSC7-2050 when firmware flexibility, multi-event detection, or lower sleep current outweighs analog simplicity. |
Compared with ADXL335BCPZ and KXSC7-2050, the MMA7361LCR2 uniquely combines hardware-accelerated 0g-detect, ultra-low 3 μA sleep, and dual-range analog outputs in a minimal 14-pin LGA - making it optimal for cost-sensitive, battery-constrained freefall and tilt applications requiring deterministic interrupt latency.
Availability
MMA7361LCR2 is available at Aetrix Electronics and suitable for laptop anti-theft systems, portable media player drop protection, and smartphone motion UIs requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for MMA7361LCR2 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 fabless semiconductor company specializing in embedded processing, sensors, and connectivity solutions for automotive, industrial, and consumer markets.
The MMA7361LCR2 belongs to Freescale's Xtrinsic™ family of intelligent sensors, designed specifically for motion-aware portable electronics where low power, small footprint, and deterministic freefall response are essential.
FAQ
What is the operating voltage range for the MMA7361LCR2?
The MMA7361LCR2 operates from 2.2 V to 3.6 V. Within this range, it maintains full calibration and specified performance including sensitivity, offset, and bandwidth. Operation below 2.2 V or above 3.6 V may yield linear output but is not guaranteed to meet datasheet specifications. The MMA7361LCR2's ratiometric architecture ensures that output voltage scales proportionally with supply voltage, simplifying integration with 3.3 V microcontrollers.
How does the 0g-Detect feature work on the MMA7361LCR2?
The 0g-Detect feature on the MMA7361LCR2 asserts a logic-high signal on pin 9 when the absolute acceleration on all three axes (X, Y, Z) falls within ±0.4 g. This hardware-level detection occurs independently of the host MCU and enables immediate interrupt-driven responses - such as HDD head parking or display blanking - without software polling or threshold computation. The MMA7361LCR2's 0g-Detect timing is optimized for freefall scenarios, with response validated down to 1.8 m drop height onto concrete.
Can the MMA7361LCR2 be used in battery-powered wearable devices?
Yes, the MMA7361LCR2 is well-suited for battery-powered wearables due to its 3 μA typical sleep current and fast 0.5 ms wake-up time. In sleep mode, analog outputs are disabled and only the 0g-Detect and Self Test functions remain responsive to external stimuli. When paired with a low-power MCU that wakes on pin 9 interrupt, the MMA7361LCR2 enables multi-day operation on compact batteries - a key advantage over alternatives lacking hardware freefall detection or deeper sleep states.
What is the purpose of the g-Select pin on the MMA7361LCR2?
The g-Select pin (pin 10) on the MMA7361LCR2 selects between two full-scale ranges: logic low configures ±1.5g (800 mV/g sensitivity), and logic high configures ±6g (206 mV/g). This allows a single design to adapt to varying motion profiles - e.g., high-resolution tilt sensing at 1.5g or shock detection at 6g. The MMA7361LCR2 includes an internal pull-down resistor, so leaving g-Select unconnected defaults to ±1.5g mode without external components.
Does the MMA7361LCR2 require external filtering components?
The MMA7361LCR2 integrates a single-pole switched-capacitor low-pass filter, eliminating the need for external resistors or capacitors to set cutoff frequency. However, Freescale recommends a 3.3 nF capacitor on each analog output (XOUT/YOUT/ZOUT) to suppress clock noise from the internal filter circuitry, and a 0.1 μF capacitor between VDD and VSS for power supply decoupling. These are not filter-setting components but noise mitigation elements specified in the recommended connection diagram.
MMA7361LCR2 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:
- ±1.5g, 6g
- Sensitivity (LSB/g):
- -
- Sensitivity (mV/g):
- 800 (±1.5g) ~ 206 (±6g)
- 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)
MMA7361LCR2 FAQ
1.How can I place an order for MMA7361LCR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA7361LCR2 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 MMA7361LCR2 reliable?
The price and inventory of MMA7361LCR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA7361LCR2 is usually 5 days.
3.What payment methods are accepted for MMA7361LCR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA7361LCR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA7361LCR2?
MMA7361LCR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA7361LCR2 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 MMA7361LCR2?
For technical support, including MMA7361LCR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA7361LCR2 requirements.
6.How does Aetrix verify that MMA7361LCR2 is sourced from the original manufacturer or authorized distributors?
All MMA7361LCR2 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 MMA7361LCR2 meets industry standards.
7.What is the process for return or replacement of MMA7361LCR2?
All MMA7361LCR2 units undergo pre-shipment inspection (PSI). If there is an issue with MMA7361LCR2, 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 MMA7361LCR2 part is unused and in its original packaging.
Return procedure for MMA7361LCR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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