MMA6341LT - ±3g/±9g 2-Axis Low-g Accelerometer | NXP
MPN: MMA6341LT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.5 | $65.00 |
| 100 | $5.75 | $575.00 |
| 500 | $5.2 | $2,600.00 |
| 1,000 | $4.65 | $4,650.00 |
| 3,000 | $4.1 | $12,300.00 |
MMA6341LT Overview
An accelerometerometer is a micro-electromechanical sensor (MEMS) that transduces gravitational or inertial acceleration into a proportional electrical signal. The MMA6341LT belongs to the capacitive-sensing MEMS family, in which a proof mass moves between fixed interdigitated electrodes and the change in capacitance is read out by an on-chip ASIC. In the broader hierarchy it sits under: accelerometerter -> inertial sensor -> MEMS device -> semiconductor sensor, and it is typically used as a tilt/inclination or motion-front-end in a power-management or user-interface subsystem.
Key features include selectable ±3 g / ±9 g full-scale range via the g-Select pin, ±5 % sensitivity trim accuracy over temperature, 1-pole low-pass filter with 400 Hz bandwidth, ratiometric analog output, and an ultra-low 3 µA Sleep Mode current. The 14-pin LGA (3x5) package measures only 3 mm × 5 mm × 1 mm and provides a robust industrial temperature range of -40 °C to +85 °C.
The MMA6341LT uses Freescale/NXP's high-aspect-ratio micromachined sense element with a BiCMOS signal-chain ASIC, which yields better than 5 % sensitivity accuracy, factory-set zero-g offset (no external trim components required), and a low ratiometric output noise density suitable for tilt and motion-detection bandwidths.
Typical applications include portable consumer-electronics tilt and orientation (eBook readers, remote controls, gaming controllers), hard-disk drive free-fall detection, motion-activated user interfaces, vibration monitoring in industrial equipment, and anti-tamper / inclinometer modules. Because the output is ratiometric to VDD, designers can read it directly with an MCU ADC without an external precision reference.
When designing with this device, place 0.1 µF decoupling capacitors as close as possible to the VDD pin and keep the g-Select pin tied either to GND or VDD with a defined logic level (never floating). The exposed pad on the LGA must be soldered to the PCB ground plane to provide mechanical stability and thermal dissipation.
This page synthesizes distributor pricing, drop-in alternatives in the same 14-LGA footprint, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for MMA6341LT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MMA6340LT
✅ Drop-In📋 Reference alternative (not in catalog)
MMA6344LT
✅ Drop-In📋 Reference alternative (not in catalog)
MMA7331LT
✅ Drop-In📋 Reference alternative (not in catalog)
MMA7341LT
✅ Drop-In📋 Reference alternative (not in catalog)
MMA6351LT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MMA7361LT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MMA6341LT Maximum Ratings & Electrical Characteristics
| Sensor Type | Accelerometer, 2-axis (X, Y) |
| Sensing Technology | Capacitive MEMS |
| Full-Scale Range | ±3 g, ±9 g (selectable via g-Select) |
| Sensitivity (3 g mode) | 550 mV/g (typical at 3.0 V) |
| Sensitivity (9 g mode) | 180 mV/g (typical at 3.0 V) |
| Output Type | Analog, ratiometric to VDD |
| Bandwidth | 400 Hz (1-pole LPF) |
| Supply Voltage | 2.2 V to 3.6 V |
| Supply Current (Normal) | 500 µA (typical) |
| Supply Current (Sleep) | < 3 µA |
| Zero-g Offset (factory trim) | ±50 mg (typical) |
| Sensitivity Trim Accuracy | ±5 % (over temperature) |
| Operating Temperature | -40 °C to +85 °C |
| Package | 14-LGA (3 mm × 5 mm × 1 mm) |
| Mounting Type | Surface Mount (LGA, exposed pad) |
| MSL Level | 3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant (lead-free) |
| g-Select Logic Input | Yes (selects ±3 g / ±9 g full-scale) |
MMA6341LT Pin Configuration
| Pin 1 | NC — Not connected (per datasheet) |
| Pin 2 | NC — Not connected (per datasheet) |
| Pin 3 | NC — Not connected (per datasheet) |
| Pin 4 | NC — Not connected (per datasheet) |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | XOUT — X-axis analog output (ratiometric to VDD) |
| Pin 7 | YOUT — Y-axis analog output (ratiometric to VDD) |
| Pin 8 | g-Select — Range select logic input: 0 = ±3 g, 1 = ±9 g |
| Pin 9 | NC — Not connected (per datasheet) |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | VDD — Power supply (2.2 V to 3.6 V) |
| Pin 13 | GND — Ground reference |
| Pin 14 | NC — Not connected (per datasheet) |
Typical Applications
MMA6341LT is suitable for 6 applications: Tilt & Orientation Sensing in Consumer Electronics, Hard-Disk Drive Free-Fall Detection, Portable Medical Motion & Activity Monitors, Industrial Vibration & Inclinometer Modules, Gaming & Motion Controller Input, Anti-Tamper & Security Orientation Detection.
Tilt & Orientation Sensing in Consumer Electronics
The MMA6341LT is well suited to tilt and orientation sensing in portable consumer devices such as eBook readers, remote controls and gaming controllers. Its ±3 g low-g mode gives 550 mV/g sensitivity at 3.0 V, so a small tilt of 30° produces a measurable ~440 mV swing at the analog output, easily read by an MCU ADC. The ratiometric output tracks VDD/2 as the zero-g reference, simplifying single-supply designs, while the 3 µA Sleep Mode keeps idle battery drain negligible. The 14-LGA (3x5 mm) package fits inside space-constrained handheld enclosures. Designers typically place the part near the device's center of gravity with the LGA exposed pad soldered to ground for mechanical stability.
Recommended
Hard-Disk Drive Free-Fall Detection
The MMA6341LT's ±9 g full-scale mode and 400 Hz low-pass bandwidth make it appropriate for HDD free-fall detection, where the drive must park its heads within milliseconds when the laptop is dropped. The MMA6341LT generates an analog voltage proportional to the deceleration that can be threshold-detected by a single comparator or an MCU ADC channel; the g-Select pin can be hard-wired to VDD for full ±9 g coverage. Because the part draws only 500 µA active and 3 µA in Sleep, it has negligible impact on battery life. Its LGA footprint fits beneath the HDD connector area without adding to the laptop's z-height.
Recommended
Portable Medical Motion & Activity Monitors
Battery-powered medical wearables and patient-activity monitors use the MMA6341LT to detect posture changes, fall events and ambulation. Its ±3 g range covers normal human-motion acceleration (typical walking cadence is <2 g peak), and the ratiometric output simplifies interface to medical-grade low-power MCUs. The 500 µA active current is acceptable during measurement windows, while Sleep Mode at 3 µA extends battery life between samples. According to the NXP MMA6341L datasheet, the part's industrial -40 °C to +85 °C range also handles clinical-environment temperature swings. The exposed LGA pad provides a stable reference for accurate tilt readings even under mechanical vibration.
Recommended
Industrial Vibration & Inclinometer Modules
The MMA6341LT's ±3 g / ±9 g selectable range and 400 Hz analog bandwidth are sufficient for low-frequency industrial vibration monitoring and inclinometer modules used on construction equipment, agricultural machinery and solar trackers. Its capacitive MEMS architecture is more rugged than piezo alternatives in high-shock environments, and the factory-trimmed zero-g offset removes the need for field calibration. The ratiometric analog output can be routed through a long shielded cable to a centralized PLC analog input, or read locally by a microcontroller. The 14-LGA package's exposed pad helps dissipate thermal stress from -40 °C to +85 °C operating swings, while the 500 µA supply current suits 24 V-loop-powered sensor heads when paired with a 3.3 V LDO.
Recommended
Gaming & Motion Controller Input
Game controllers and motion-sensing remote controls leverage the MMA6341LT for tilt-to-steer and motion-gesture inputs. The ±3 g low-g mode gives the high 550 mV/g sensitivity needed to detect subtle wrist tilts, while the ±9 g mode captures fast flick gestures without saturating. The analog output can be sampled at >1 kHz by the controller MCU, well above the part's 400 Hz -3 dB bandwidth, providing low-latency gesture recognition. Sleep Mode at 3 µA helps the controller meet battery-life targets between play sessions, and the small 14-LGA (3x5 mm) footprint fits inside a slim handset. Designers typically route the LGA exposed pad to ground for stable reference and add a 0.1 µF decoupling cap on VDD.
Recommended
Anti-Tamper & Security Orientation Detection
The MMA6341LT is used in security devices (ATM anti-tamper modules, smart-meter tilt alarms, anti-theft sensors for high-value equipment) to detect unauthorized reorientation or removal. The ±3 g / ±9 g selectable range allows the device to discriminate between small tilts and violent impacts, and the analog ratiometric output can be read by a low-cost comparator to trigger an alarm without waking the main MCU. Sleep Mode at 3 µA supports multi-year battery life on coin-cell-powered wireless anti-tamper tags. The 14-LGA exposed pad mechanically couples the sense element to the PCB, suppressing false alarms from vibration, while the industrial -40 °C to +85 °C range handles outdoor enclosures.
Recommended
Recommended Products Summary
Engineering reference data for MMA6341LT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MMA6340LT | MMA6344LT | MMA7331LT | MMA7341LT | MMA6351LT |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 14-LGA (3x5 mm) | 14-LGA (3x5 mm) - same | 14-LGA (3x5 mm) - same | 14-LGA (3x5 mm) - same | 14-LGA (3x5 mm) - same | 14-LGA (3x5 mm) - same |
| Axes | X, Y (2-axis) | X, Y (2-axis) | Z (1-axis) | X, Y (2-axis) | X, Y (2-axis) | X, Y (2-axis) |
| Full-Scale Range | ±3 g / ±9 g (g-Select) | ±1.5 g / ±6 g | ±3 g / ±9 g (Z only) | ±4 g / ±12 g / ±16 g | ±3 g / ±11 g | ±1.5 g / ±6 g |
| Supply Voltage | 2.2 V to 3.6 V | 2.2 V to 3.6 V | 2.2 V to 3.6 V | 2.2 V to 3.6 V | 2.2 V to 3.6 V | 2.2 V to 3.6 V |
| Sleep Mode Current | < 3 µA | < 3 µA | < 3 µA | < 3 µA | < 3 µA | < 3 µA |
| Output Type | Analog, ratiometric | Analog, ratiometric | Analog, ratiometric | Analog, ratiometric | Analog, ratiometric | Analog, ratiometric |
| Bandwidth | 400 Hz | 400 Hz | 400 Hz | 400 Hz (X, Y); 300 Hz (Z) | 400 Hz | 400 Hz |
Key Differentiators
- Selectable ±3 g / ±9 g range via single logic pin (vs MMA6340LT)
- Pin-compatible Z-axis variant for layout reuse (vs MMA6344LT)
- Wider high-g range than closest sibling (vs MMA6340LT)
Design Notes
Place a 0.1 µF ceramic decoupling capacitor as close as possible to the VDD pin (pin 12) and a 1 µF bulk capacitor within 5 mm of the part. The analog output is ratiometric to VDD, so any ripple on VDD appears directly on the XOUT/YOUT outputs. Use a low-noise LDO (e.g., NXP TLV1117 or TPS7A02 family) rather than a switching regulator for VDD to preserve the part's noise floor for tilt applications.
The 14-LGA (3x5 mm) package has an exposed die pad on the underside that must be soldered to a continuous PCB ground plane. This pad provides the electrical reference for the capacitive MEMS sense element and mechanical coupling to suppress PCB-bend-induced offset. Use a 3x5 mm copper land pattern with at least 6 thermal-via array to inner ground plane. Place no signal traces under the LGA footprint - keep-out is required by the NXP datasheet.
Route XOUT and YOUT as differential-style guarded traces, with ground fill on both sides and a ground-guard via stitch every 5 mm. Keep the traces short (≤25 mm) to minimize capacitive loading on the high-impedance analog outputs. Avoid routing XOUT/YOUT parallel to switching-power or motor-drive traces - the MEMS output bandwidth (400 Hz) is low, but switching transients can couple through VDD and produce rectified offset errors. Reference the NXP MMA6341L datasheet section on PCB layout for a reference design.
Do not leave the g-Select pin (pin 8) floating - tie it firmly to VDD (logic 1, ±9 g mode) or GND (logic 0, ±3 g mode) with a defined driver. A floating g-Select can cause the part to operate in an undefined mode with non-guaranteed sensitivity. Do not exceed the 3.6 V absolute-maximum VDD rating; transients above 4 V can permanently damage the ASIC. Avoid hand-soldering the LGA - use a reflow profile per JEDEC J-STD-020 MSL3 (the part is moisture-sensitive and requires bake-out if the factory seal has been open >168 hours).
Compliance Information
RoHS compliant and lead-free per NXP product page and DigiKey listing. Industrial -40 °C to +85 °C temperature grade (not AEC-Q100 automotive qualified). MSL 3 moisture sensitivity level per JEDEC J-STD-020.
