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NXP Semiconductors MMA7361LCR1
- Part No.:
- MMA7361LCR1
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 14-TFLGA
- Datasheet:
-
MMA7361LCR1.pdf
- Description:
- ACCEL 1.5-6G ANALOG 14LGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,833
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Product details
Overview
MMA7361LCR1 from Freescale Semiconductor is a 3-axis capacitive MEMS accelerometer with integrated signal conditioning, selectable ±1.5g/±6g ranges, 0g-detect for freefall protection, self-test, and sleep mode. It delivers 800 mV/g sensitivity at ±1.5g, operates from 2.2–3.6 V, draws only 400 μA active or 3 μA in sleep, and uses an LGA-14 package for compact handheld motion sensing.
For engineers reviewing the MMA7361LCR1 datasheet, MMA7361LCR1 pinout, MMA7361LCR1 application, or MMA7361LCR1 equivalent, key selection criteria include its ratiometric analog outputs, fast 0.5 ms enable response, factory-trimmed zero-g offset, and support for tilt compensation, HDD drop detection, and motion-triggered UI functions in battery-constrained devices.
Technical Context
The MMA7361LCR1 integrates a surface-micromachined polysilicon g-cell with a dedicated ASIC using switched-capacitor measurement, temperature-compensated gain/offset trimming, and a single-pole switched-capacitor low-pass filter. Its internal 11 kHz sampling clock drives all axes synchronously without external components.
It implements digital control logic for g-select (pin 10), sleep mode (pin 7), and self-test (pin 13), while providing three independent ratiometric analog voltage outputs (XOUT/YOUT/ZOUT) referenced to VDD, plus a dedicated open-drain 0g-detect output (pin 9) that asserts high when all axes read near 0g.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.2 V – 3.6 V - Enables direct interface with 2.5 V/3.3 V microcontrollers without level-shifting. |
| Active Current | 400 μA typ - Supports >1-year battery life in intermittent-sampling portable devices. |
| Sleep Current | 3 μA typ - Reduces power by >99% during idle periods while retaining configuration state. |
| Sensitivity (±1.5g) | 800 mV/g - Delivers ~1.32 V to 1.815 V output swing per axis at 3.3 V supply for high-resolution ADC capture. |
| Bandwidth (XY) | 400 Hz - Sufficient for human-motion detection (e.g., pedometer, tilt) without aliasing from mechanical vibration. |
| 0g-Detect Output | Digital open-drain signal - Directly connects to MCU interrupt pin for immediate freefall event handling. |
| Self-Test Response | 2.0 ms typ - Confirms functional integrity of both mechanical g-cell and analog signal chain pre-deployment. |
Pinout & Package
Package: 3 mm × 5 mm × 1.0 mm LGA-14 (Case 1977-01), RoHS-compliant, surface-mountable with solder-mask-defined footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 11, 12, 14 | No Connect | Internally unconnected - Must remain floating; no PCB trace or pad required. |
| 2 (XOUT) | Analog X-Axis Output | Ratiometric voltage (VDD/2 ± ΔV) 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 by top-side marking - critical for gravity-referenced applications. |
| 4 (YOUT) | Analog Y-Axis Output | Independent analog output with identical scaling and noise profile - enables full 3D vector reconstruction. |
| 5 (VSS) | Ground Reference | Primary return path for analog and digital sections - must connect to solid ground plane beneath package. |
| 6 (VDD) | Power Input | Supplies both ASIC and g-cell - requires 0.1 μF ceramic decoupling capacitor placed within 2 mm. |
| 7 (Sleep) | Logic Control Input | Low-active enable: <0.3×VDD = Sleep Mode (3 μA); >0.7×VDD = Active Mode - compatible with standard GPIOs. |
| 9 (0g-Detect) | Digital Event Output | Open-drain, active-high signal asserted when |X|, |Y|, |Z| < 0.4 g - used for immediate system-level freefall response. |
| 10 (g-Select) | Sensitivity Control | Logic input selecting ±1.5g (low) or ±6g (high) range - internal pull-down defaults to 1.5g if left unconnected. |
| 13 (Self Test) | Diagnostic Activation | Pulse-high (>100 ns) initiates electrostatic deflection test - X/Y deflect ~0.05 g, Z deflects ~1.0 g for verification. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Trimmed Zero-G Offset | ±0.5 mV/g temperature coefficient ensures stable 1.65 V mid-scale output across –40°C to +85°C without calibration. |
| Ratiometric Output Architecture | Output offset and sensitivity scale linearly with VDD - eliminates supply-induced errors when digitized by same-supply ADC. |
| Integrated Low-Pass Filtering | On-chip switched-capacitor filter sets bandwidth without external RC components - simplifies layout and improves repeatability. |
| Linear Freefall Detection | 0g-Detect pin provides hardware-level event flag for HDD protection or anti-theft activation - no firmware polling required. |
| Configurable Sensitivity Range | g-Select pin switches between high-resolution (±1.5g/800 mV/g) and high-range (±6g/206 mV/g) modes dynamically during operation. |
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: MMA7361LCR1 monitors all three axes continuously in low-power sleep mode, triggering 0g-Detect output within milliseconds. Use Value: Enables hard disk head retraction before impact - prevents data loss and mechanical damage in <100 ms. |
Use Scenario: Portable music player experiences freefall during pocket or bag movement. IC Role / Device Role / Timing Role: MMA7361LCR1 operates in ±1.5g mode with 400 Hz bandwidth to distinguish drop events from normal motion. Use Value: Halts write operations and parks read/write heads preemptively - extends device lifetime and preserves audio file integrity. |
| Smartphone Motion UI | Pedometer Step Counting |
|
Use Scenario: User rotates phone to scroll text or initiate motion dialing. IC Role / Device Role / Timing Role: MMA7361LCR1 delivers synchronized X/Y/Z analog outputs sampled at ≥1 kHz via MCU ADC for real-time tilt vector calculation. Use Value: Enables responsive, low-latency gesture recognition without external timing references or complex sensor fusion algorithms. |
Use Scenario: Wearable device detects repetitive vertical acceleration peaks during walking. IC Role / Device Role / Timing Role: MMA7361LCR1 configured in ±1.5g mode captures foot-strike dynamics with 350 μg/√Hz noise floor for reliable peak detection. Use Value: Achieves >95% step-count accuracy over varied terrain and walking speeds using only analog output thresholding. |
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 | Wider supply range (1.8–3.6 V), higher noise (500 μg/√Hz), no 0g-detect or self-test. | Lacks hardware freefall interrupt; requires firmware-based zero-g detection and calibration. | Choose ADXL335BCPZ when lower supply voltage or broader temperature tolerance is prioritized over event-driven features. |
| KXSC7-2050-FR | Digital I²C/SPI output, integrated FIFO, programmable interrupts, 2.5 V–3.6 V supply, 3 μA sleep. | Requires MCU firmware support for register configuration and interrupt handling instead of direct analog interfacing. | Choose KXSC7-2050-FR when digital interface, on-chip motion detection, or multi-event interrupt capability is needed over analog simplicity. |
Compared with ADXL335BCPZ and KXSC7-2050-FR, the MMA7361LCR1 uniquely combines analog output simplicity, built-in 0g-detect hardware interrupt, and sub-μA sleep current - making it optimal for cost-sensitive, battery-powered systems requiring immediate freefall response without MCU intervention.
Availability
MMA7361LCR1 is available at Aetrix Electronics and suitable for laptop anti-theft systems, portable media player drop protection, smartphone motion UI, pedometer designs, and robotics motion sensing requiring stable component supply and long-term manufacturability.
Supply support for MMA7361LCR1 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 system integration.
The MMA7361LCR1 belongs to Freescale's Xtrinsic™ family of intelligent sensors, designed specifically for ultra-low-power motion-aware portable electronics where analog simplicity, rapid wake-up, and hardware-accelerated event detection are critical.
FAQ
What is the operating voltage range for the MMA7361LCR1?
The MMA7361LCR1 operates from 2.2 V to 3.6 V DC. Within this range, it maintains full specification compliance including factory-trimmed offset, sensitivity, and bandwidth. Operation below 2.2 V or above 3.6 V may result in undefined behavior or permanent damage, as specified in the absolute maximum ratings table of the MMA7361LCR1 datasheet.
How does the g-Select pin configure sensitivity on the MMA7361LCR1?
The g-Select pin (Pin 10) selects between ±1.5g (logic low) and ±6g (logic high) full-scale ranges. When left unconnected, an internal pull-down resistor sets MMA7361LCR1 to ±1.5g mode with 800 mV/g sensitivity. This allows dynamic range switching during operation without changing external circuitry.
What is the purpose of the 0g-Detect output on the MMA7361LCR1?
The 0g-Detect output (Pin 9) is an open-drain digital signal that goes high when acceleration magnitude on all three axes falls below ±0.4 g - indicating freefall. It enables immediate hardware-level response in applications like HDD head parking or laptop anti-theft, eliminating software polling latency in the MMA7361LCR1 implementation.
Can the MMA7361LCR1 be used without external filtering components?
Yes - the MMA7361LCR1 includes an onboard single-pole switched-capacitor filter. However, a 3.3 nF capacitor is recommended on each analog output (XOUT/YOUT/ZOUT) to suppress internal clock noise, and a 0.1 μF capacitor is required on VDD for power supply decoupling. These are not optional for stable MMA7361LCR1 operation.
What is the typical current draw of the MMA7361LCR1 in Sleep Mode?
The MMA7361LCR1 draws 3 μA typical current in Sleep Mode, activated by pulling the Sleep pin (Pin 7) low. This ultra-low quiescent current extends battery life significantly in intermittently active portable devices, and the MMA7361LCR1 resumes full operation within 0.5 ms after Sleep pin is driven high.
MMA7361LCR1 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)
MMA7361LCR1 FAQ
1.How can I place an order for MMA7361LCR1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA7361LCR1 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 MMA7361LCR1 reliable?
The price and inventory of MMA7361LCR1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA7361LCR1 is usually 5 days.
3.What payment methods are accepted for MMA7361LCR1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA7361LCR1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA7361LCR1?
MMA7361LCR1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA7361LCR1 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 MMA7361LCR1?
For technical support, including MMA7361LCR1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA7361LCR1 requirements.
6.How does Aetrix verify that MMA7361LCR1 is sourced from the original manufacturer or authorized distributors?
All MMA7361LCR1 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 MMA7361LCR1 meets industry standards.
7.What is the process for return or replacement of MMA7361LCR1?
All MMA7361LCR1 units undergo pre-shipment inspection (PSI). If there is an issue with MMA7361LCR1, 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 MMA7361LCR1 part is unused and in its original packaging.
Return procedure for MMA7361LCR1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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