MMA2301EG - ±225g X-Axis Analog Accelerometer | NXP
料号： MMA2301EG ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.85 | $1,385.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.95 | $9,950.00 |
MMA2301EG 概述
An accelerometer is a MEMS (micro-electro-mechanical systems) sensor that converts mechanical acceleration into an electrical signal. Within the broader sensor hierarchy it sits under motion sensors, itself a branch of the broader transducer family that includes gyroscopes, magnetometers, and inertial measurement units. The MMA series from NXP/Freescale represents one of the earliest widely adopted analog-output single-axis automotive accelerometers, prized for their robust g-range and factory calibration simplicity.
Key features include an integrated 4-pole low-pass filter (fc ≈ 400 Hz) that limits aliasing and out-of-band noise before downstream ADC sampling, factory-calibrated zero-g offset and sensitivity that remove the need for production-line trimming, and an internal temperature compensation scheme that holds sensitivity and offset within tight limits across the automotive –40 °C to +125 °C range. The SOIC-16 wide-body package offers a stable mechanical anchor for the MEMS element and eases hand-rework compared to smaller QFN-based accelerometers.
The MMA2301EG is built on NXP's surface micromachining silicon capacitive process: a proof mass suspended by compliant beams forms a differential capacitor with fixed stator fingers; acceleration deflects the mass and unbalances the capacitance, which the on-chip ASIC conditions, filters, and converts to a ratiometric analog output. This architecture delivers high shock survivability and stable operation across the full automotive temperature range with no external clock or reference components required.
Typical applications include automotive airbag crash detection (front and side impact sensors), industrial vibration monitoring of rotating machinery, mechanical shock logging in shipping containers and freight, sports impact analysis (helmets, body protectors), and ride-harshness or road-surface sensing in vehicle chassis systems. The high ±225 g full-scale range is specifically sized for short-duration crash pulses that saturate lower-g consumer accelerometers.
When designing with this part, place a 0.1 µF decoupling capacitor close to the supply pin and route the analog output away from switching converters to preserve signal integrity. Because the part is ratiometric, the ADC reference should share the same supply rail to retain calibrated sensitivity.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not found in the manufacturer datasheet, giving engineers a single source for part selection and second-source qualification.
直接替换替代料： MMA2301EG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MMA2301EG （相同外形与封装尺寸） ——差异在于 Package, Bandwidth, RoHS Status, Lead Free Status, Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
MMA2202EG
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$10.85 / 个
查看数据手册 →MMA3202EG
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$10.4 / 个
查看数据手册 →MMA2301EGR2
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$7.4 / 个
查看数据手册 →MMA1270EG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MMA6261EG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MMA2301EG 最大额定值与电气特性
| 传感器类型 | Accelerometer, single-axis (X) |
| 测量范围 | ±225 g (full scale); 200 g nominal |
| Bandwidth | 400 Hz (4-pole low-pass filter, factory trimmed) |
| 输出类型 | Analog, ratiometric voltage |
| Axis | X (single axis) |
| 电源电压 | 5.0 V typical (ratiometric output) |
| Filter Type | 4-pole low-pass (Bessel-type), internal |
| 工作温度 | −40 °C to +125 °C (automotive) |
| 封装 | 16-SOIC (SOP-16 wide-body, 7.5 mm) |
| 安装类型 | Surface Mount |
| Technology | MEMS, silicon capacitive surface micromachined |
| Signal Conditioning | Integrated ASIC; on-chip temperature compensation |
| External Components Required | None (zero-g, full-scale, and filter factory calibrated) |
| Lead Free Status | Lead Free – Compliant by Exemption |
| RoHS 状态 | RoHS Compliant |
MMA2301EG 引脚配置
| 引脚 1 | NC — Not connected (per datasheet) |
| 引脚 2 | NC — Not connected (per datasheet) |
| 引脚 3 | NC — Not connected (per datasheet) |
| 引脚 4 | GND — Ground return |
| 引脚 5 | NC — Not connected (per datasheet) |
| 引脚 6 | NC — Not connected (per datasheet) |
| 引脚 7 | NC — Not connected (per datasheet) |
| 引脚 8 | VDD — 5 V supply (ratiometric reference) |
| 引脚 9 | ST — Self-test input (active high) |
| 引脚 10 | NC — Not connected (per datasheet) |
| 引脚 11 | NC — Not connected (per datasheet) |
| 引脚 12 | OUT — Analog ratiometric output voltage proportional to X-axis acceleration |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | NC — Not connected (per datasheet) |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | NC — Not connected (per datasheet) |
典型应用
MMA2301EG 适用于 6 应用s: Automotive Airbag Crash Sensing, Industrial Vibration Monitoring, Mechanical Shock and Impact Logging, Sports and Helmet Impact Analysis, Ride Harshness and Road Surface Sensing, Drop and Tilt Test for Portable Electronics.
Automotive Airbag Crash Sensing
The MMA2301EG's ±225 g full-scale range is dimensioned to capture the short-duration, high-amplitude acceleration pulses generated during front and side impact crash events, where peak pulses routinely exceed 100 g and saturate lower-g sensors. Placed at the front crumple zone or side B-pillar of the vehicle, it feeds an analog ratiometric signal directly to the airbag control unit's ADC for crash discrimination and deployment timing. The integrated 4-pole 400 Hz low-pass filter removes high-frequency mechanical and electrical noise that would otherwise alias into the crash algorithm, reducing false deployment risk. Compared with digital-output modern alternatives, the MMA2301EG's analog interface simplifies legacy airbag ECU designs that already assume a ratiometric voltage input.
推荐
Industrial Vibration Monitoring
Industrial rotating machinery (pumps, motors, fans, compressors) emits characteristic vibration signatures whose RMS and spectral content indicate bearing wear, imbalance, and cavitation. The MMA2301EG's wide ±225 g range captures both routine vibration levels and transient shock events such as blade-pass frequencies or coupling impacts without saturating, making it useful as a low-cost machine-condition monitor. Mounted on the equipment housing, it outputs an analog signal that an external ADC samples; the integrated 400 Hz filter naturally limits aliasing from high-frequency electrical noise on factory floors. The automotive –40 °C to +125 °C rating handles harsh industrial enclosures without derating. Compared with piezoelectric accelerometers, the MMA2301EG is lower cost and lower impedance but does not cover ultrasonic vibration bands.
推荐
Mechanical Shock and Impact Logging
Freight-handling shock logging requires a sensor that survives and quantifies drops, drops-on-corners, and conveyor impacts without saturating or clipping. The MMA2301EG's ±225 g range captures the peak acceleration of a 1 m drop of typical parcel mass (which can briefly exceed 150 g) while its on-chip 4-pole low-pass filter attenuates the high-frequency mechanical ringing that would otherwise saturate downstream electronics. Battery-powered shock data loggers benefit from the integrated signal conditioning that eliminates external analog filter components, reducing BOM cost and quiescent current draw. Compared with consumer-grade ±16 g accelerometers, the MMA2301EG provides the headroom needed to characterize, not just detect, severe impacts in supply-chain insurance and warranty investigations.
推荐
Sports and Helmet Impact Analysis
Concussion research, helmet certification, and contact-sport impact telemetry all require sensors that capture the full biomechanical pulse of a head impact, often with peaks between 50 g and 200 g. The MMA2301EG's ±225 g range covers the worst-case American football and hockey impacts without saturating, while the analog output allows direct connection to a small instrumentation amplifier and 12-bit ADC inside a head-impact patch or mouthguard. The on-chip temperature compensation holds sensitivity within tight limits across the body-temperature range an athlete generates during exertion, so impact magnitudes remain comparable across measurements. Compared with consumer 6-axis IMUs, the MMA2301EG provides dedicated single-axis g-range without oversampling burden on the host MCU.
推荐
Ride Harshness and Road Surface Sensing
Vehicle chassis engineers quantify ride comfort through vertical and lateral acceleration spectra measured at the seat rail or suspension member during standardized road profiles. The MMA2301EG's high g-range captures not only normal ride events but also severe pothole strikes and expansion-joint impacts that lower-g accelerometers would clip, providing unaliased data for suspension tuning and NVH analysis. The 400 Hz internal filter naturally limits aliasing from suspension structural modes that lie above the bandwidth of interest for body-bounce analysis. Compared with chassis-only ±5 g sensors, the MMA2301EG extends the analysis range to include one-off severe events without resorting to a separate high-g transducer.
推荐
Drop and Tilt Test for Portable Electronics
Reliability laboratories characterize drop performance of handheld products (mobile phones, two-way radios, medical handhelds) against standards such as IEC 60068-2-31 and MIL-STD-810. The MMA2301EG's ±225 g range captures the peak deceleration of a 1.5 m drop onto concrete (which can momentarily exceed 200 g) while its integrated 4-pole low-pass filter attenuates the high-Q mechanical ringing of the device under test. The analog output enables direct connection to high-speed oscilloscopes or data acquisition boards without digital-protocol overhead. Compared with on-board consumer IMUs, the MMA2301EG provides an independent calibrated reference channel for verifying DUT sensor accuracy during qualification testing.
推荐
推荐产品汇总
工程参考数据： MMA2301EG ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MMA2202EG | MMA3202EG | MMA2301EGR2 | MMA1270EG | MMA6261EG |
|---|---|---|---|---|---|---|
| Package | 16-SOIC | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Acceleration Range | ±225 g (200 g nominal) | ±50 g | ±50 g | ±225 g (identical) | ±10 g | ±1.5 g to ±10 g selectable |
| Axis | X single axis | X single axis | X single axis | X single axis | Z single axis | X+Y dual axis |
| Output Type | Analog ratiometric | Analog ratiometric | Analog ratiometric | Analog ratiometric | Analog ratiometric | Analog ratiometric |
| Supply Voltage | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 3.3 V or 5.0 V |
| Operating Temperature | −40 °C to +125 °C | −40 °C to +125 °C | −40 °C to +125 °C | −40 °C to +125 °C | −40 °C to +125 °C | −40 °C to +85 °C |
关键差异点
- Wide ±225 g full-scale range specifically tuned for crash-pulse capture （对比 MMA2202EG / MMA3202EG)
- Single-axis X-axis sensing matches legacy airbag ECU front-end architectures （对比 MMA6261EG)
- Factory-calibrated 4-pole 400 Hz filter eliminates external anti-alias components （对比 MMA1270EG)
设计说明
The MMA2301EG is ratiometric: its analog output is proportional to VDD, so the ADC reference MUST share the same 5 V rail to retain the factory-calibrated sensitivity. Place a 0.1 µF ceramic decoupling capacitor within 3 mm of the VDD pin (pin 8) and add a bulk 1 µF tantalum or ceramic at the supply entry. A series ferrite bead is recommended when the 5 V rail is shared with digital or switching circuitry, since supply noise couples directly into the analog output through the ratiometric architecture.
Route the analog output (pin 12) as a short, guarded trace away from switching converters, motor drivers, and PWM lines. Maintain a ground plane under the SOIC-16 footprint; do not route digital signals across the package because capacitive coupling into the MEMS element will appear as acceleration noise. The self-test pin (pin 9) is high-impedance and should be left open or pulled to GND through a 100 kΩ resistor in normal operation; do not drive it with active signals unless invoking self-test.
The integrated 4-pole low-pass filter with 400 Hz cut-off sets the maximum useful signal bandwidth. Above ~400 Hz the analog output is attenuated by 80 dB/decade, so any spectral content from mechanical resonances above this band will not appear in the output. If higher bandwidth is required, select an alternative accelerometer with a wider filter (e.g., FXLS8471Q supports user-configurable bandwidth up to ~1.6 kHz in digital mode). For crash-pulse fidelity, verify the host ADC sample rate exceeds 2× the filter cut-off (≥ 800 Hz) to satisfy Nyquist.
Estimated: do not assume the SOIC-16 footprint implies drop-in compatibility with all 16-SOIC MMA-series parts - the pinout of pin 12 (OUT) and pin 9 (ST) varies by g-range, and the g-range itself is set by factory trim rather than by external components. Substituting MMA2202EG (±50 g) or MMA3202EG (±50 g) into an MMA2301EG (±225 g) position will produce a valid signal but will saturate at 1/4.5 of the expected full-scale. Always re-validate the crash-discrimination thresholds after any g-range substitution. Additionally, the part is lead-free by RoHS exemption - some procurement systems may flag the exemption; coordinate with the compliance team.
合规信息
RoHS compliant by exemption (lead-free status per NXP/Freescale datasheet). AEC-Q100 not explicitly stated in retrieved data; automotive temperature grade implies automotive qualification but should be verified against the latest NXP qualification report before reuse. REACH, halogen-free, and conflict-minerals status not present in retrieved data.
