MMA3202EG - ±112.5g/±56.3g Dual-Axis Analog Accelerometer | NXP
料号： MMA3202EG ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.95 | $1,395.00 |
| 500 | $11.8 | $5,900.00 |
| 1,000 | $10.4 | $10,400.00 |
MMA3202EG 概述
An accelerometer is a micro-electromechanical (MEMS) sensor that converts gravitational or inertial acceleration along one or more axes into an electrical signal proportional to the applied force. Capacitive accelerometers like the MMA3202EG use a movable proof mass and fixed electrode plates to form a differential capacitor; acceleration changes the gap and therefore the capacitance, which is read out by an on-chip ASIC. This sub-family belongs to the wider hierarchy of inertial sensors (accelerometer → motion sensor → sensor IC → semiconductor), of which the MMA3202EG represents a high-g, dual-axis analog variant used primarily in automotive crash-detection systems.
Key features include ±112.5g / ±56.3g full-scale ranges, 20 mV/g and 40 mV/g nominal sensitivity, a self-test pin for in-system verification, an external g-select pin for switching between two factory-trimmed sensitivities, a 4-pole low-pass filter on each channel, and ratiometric analog outputs centered at Vdd/2 (≈2.5 V) at 0 g. The 20-pin SOIC wide-body package provides a robust mechanical mounting for under-dash automotive environments and supports standard surface-mount reflow.
The MMA3202EG is built on a high-volume silicon capacitive MEMS process with an integrated BiCMOS ASIC, achieving tight sensitivity tolerance, low zero-g offset drift over temperature, and automotive-grade reliability. The on-chip 4-pole Butterworth-type filter limits aliasing and band-limits noise without external components, simplifying the analog interface to the host microcontroller's ADC.
Typical applications include automotive airbag front and side crash sensors, electronic stability control rollover detection, industrial high-shock event recorders, vibration monitoring in heavy machinery, and seatbelt pretensioner triggers. The wide -40 °C to +125 °C operating range and AEC-Q100 qualification make it well-suited for under-hood and chassis-mounted designs.
When designing with this part, place the device close to the system ground reference, decouple Vdd with a 0.1 µF ceramic capacitor placed within 5 mm of the supply pin, and route the X and Y outputs as differential pairs back to the host ADC with proper guarding. The g-select pin must be tied to a defined logic level (not left floating) to prevent indeterminate output during power-up.
This page synthesizes real distributor pricing, drop-in pin-compatible alternatives, and practical PCB design notes not found in a single manufacturer datasheet, giving engineers a one-stop reference for the MMA3202EG.
直接替换替代料： MMA3202EG ——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： MMA3202EG （相同外形与封装尺寸） ——差异在于 Output Type, Package, RoHS Status, Supply Voltage, Bandwidth.
快速对比工具——选择替代料号进行并排对比：
MMA3202KEG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MMA3202EG
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$10.4 / 个
查看数据手册 →MMA3204KEG
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$8.25 / 个
查看数据手册 →MMA3201KEG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MMA3222KEG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MMA3202EG 最大额定值与电气特性
| 传感器类型 | Accelerometer, Dual-Axis (X, Y) |
| Sensing Technology | Capacitive MEMS |
| X-Axis Full-Scale Range | ±112.5 g |
| Y-Axis Full-Scale Range | ±56.3 g |
| X-Axis Sensitivity | 19 mV/g to 21 mV/g |
| Y-Axis Sensitivity | 38 mV/g to 42 mV/g |
| Bandwidth | 400 Hz (4-pole low-pass filter) |
| 输出类型 | Analog, ratiometric |
| 电源电压 | 5 V typical |
| 工作温度范围 | -40 °C to +125 °C |
| 封装 | 20-pin SOIC wide-body (SOW) |
| 安装类型 | Surface Mount |
| Zero-g Offset | ≈ Vdd/2 (2.5 V nominal) |
| Self-Test Pin | Yes |
| g-Select Pin | Yes (dual sensitivity) |
| Temperature Compensation | On-chip |
| Filter Type | 4-pole low-pass Butterworth |
| Automotive Grade | AEC-Q100 qualified |
| RoHS 状态 | Compliant by Exemption |
| Lead-Free Status | Lead Free |
MMA3202EG 引脚配置
| 引脚 1 | NC — Not connected (per datasheet) |
| 引脚 2 | NC — Not connected (per datasheet) |
| 引脚 3 | Vdd — 5 V analog supply |
| 引脚 4 | GND — Ground |
| 引脚 5 | NC — Not connected (per datasheet) |
| 引脚 6 | NC — Not connected (per datasheet) |
| 引脚 7 | ST — Self-test input |
| 引脚 8 | NC — Not connected (per datasheet) |
| 引脚 9 | NC — Not connected (per datasheet) |
| 引脚 10 | NC — Not connected (per datasheet) |
| 引脚 11 | NC — Not connected (per datasheet) |
| 引脚 12 | NC — Not connected (per datasheet) |
| 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) |
| 引脚 17 | NC — Not connected (per datasheet) |
| 引脚 18 | OUTX — X-axis analog output |
| 引脚 19 | OUTY — Y-axis analog output |
| 引脚 20 | GSEL — g-select (dual sensitivity) |
典型应用
MMA3202EG 适用于 6 应用s: Automotive Front Airbag Crash Sensor, Side Impact Airbag Detection, Industrial Vibration and Shock Monitoring, Rollover Detection in Electronic Stability Control, Seatbelt Pretensioner Trigger, Drop and Shock Recorder in Heavy Equipment.
Automotive Front Airbag Crash Sensor
The MMA3202EG's ±112.5 g X-axis full-scale range and 20 mV/g sensitivity are aligned with the high-shock transients of a frontal automotive crash event, where peak chassis accelerations routinely exceed 80 g. Its AEC-Q100 qualification, 4-pole 400 Hz on-chip low-pass filter, and ratiometric analog output centered at 2.5 V allow direct connection to the airbag ECU's ADC without an external op-amp stage. The integrated temperature compensation holds zero-g offset and sensitivity stable over the -40 °C to +125 °C automotive under-dash environment. Compared to a discrete piezoelectric sensor, the MMA3202EG adds self-test capability through a dedicated pin, simplifying end-of-line ECU diagnostics.
推荐
Side Impact Airbag Detection
The MMA3202EG's separate X and Y analog outputs make it well suited to side-impact airbag applications where both lateral and longitudinal acceleration must be monitored simultaneously. Its ±56.3 g Y-axis range captures the typical side-pole intrusion pulse profile, while the X-axis path provides redundant longitudinal data for safing logic. The 400 Hz on-chip filter rejects high-frequency door-slam and road-noise components, and the 5 V ratiometric output simplifies interface to the side-satellite sensor's low-cost 5 V ADC. Compared to a single-axis side sensor, the dual-axis architecture reduces ECU component count by half.
推荐
Industrial Vibration and Shock Monitoring
Industrial machines such as stamping presses, forging hammers, and large rotating equipment generate peak accelerations that exceed the range of typical low-g MEMS accelerometers but are well within the MMA3202EG's ±112.5 g X-axis window. Its analog output drives a 4-20 mA loop transmitter or a stand-alone data logger, while the 400 Hz bandwidth captures shock spectral energy without aliasing. The wide -40 °C to +125 °C operating temperature range supports outdoor and factory-floor deployment, and the SOIC wide-body package tolerates the high-vibration PCB mounting used in NEMA enclosures. Compared to a piezoelectric IEPE accelerometer, the MMA3202EG runs from a single 5 V rail and needs no charge amplifier.
推荐
Rollover Detection in Electronic Stability Control
The MMA3202EG's Y-axis (±56.3 g) is matched to the lateral acceleration experienced during a vehicle rollover event, while its X-axis provides longitudinal redundancy for ESC algorithms that combine yaw rate and lateral acceleration. The on-chip 4-pole low-pass filter rejects high-frequency road noise that would otherwise trigger false rollover events, and the g-select pin allows the ECU to switch to a higher-g range when the vehicle enters a near-rollover state. The AEC-Q100 qualification and SOIC wide-body package support under-seat mounting near the vehicle center of gravity, where lateral g is most accurately measured.
推荐
Seatbelt Pretensioner Trigger
Seatbelt pretensioners must fire within a few milliseconds of a confirmed crash event, requiring a sensor with high analog bandwidth and a wide dynamic range. The MMA3202EG's 400 Hz bandwidth captures the leading ramp of the crash pulse, while the ±112.5 g X-axis full-scale range accommodates severe front impacts. Its low output impedance analog output drives the pretensioner ECU directly without a buffering op-amp, reducing BOM cost. The integrated temperature compensation holds sensitivity within the prime factor across -40 to +125 °C, ensuring consistent deployment threshold.
推荐
Drop and Shock Recorder in Heavy Equipment
Heavy construction equipment, mining vehicles, and shipping containers experience shock events during transport and operation that must be logged for warranty and safety analysis. The MMA3202EG's ±112.5 g X-axis and ±56.3 g Y-axis ranges capture impact events up to 100 g in any direction, and its 400 Hz analog bandwidth is sufficient to resolve the energy distribution of a single shock pulse. The single 5 V supply is compatible with battery-powered telematics recorders, and the SOIC wide-body package supports through-hole mechanical mounting on ruggedized PCBs. Compared to a discrete piezoelectric shock recorder, the MMA3202EG eliminates the charge amplifier and high-impedance shielding.
推荐
推荐产品汇总
工程参考数据： MMA3202EG ——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 | MMA3202KEG | MMA3204KEG | MMA3201KEG | MMA3222KEG |
|---|---|---|---|---|---|
| Package | 20-SOIC wide-body (SOW) | 20-SOIC wide-body (SOW) - same | 20-SOIC wide-body (SOW) - same | 20-SOIC wide-body (SOW) - same | 20-SOIC wide-body (SOW) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| X-Axis Full-Scale Range | ±112.5 g | ±112.5 g | ±50 g | ±60 g | ±112.5 g |
| Y-Axis Full-Scale Range | ±56.3 g | ±56.3 g | ±25 g | ±30 g | ±56.3 g |
| X-Axis Sensitivity | 20 mV/g | 20 mV/g | 40 mV/g | 33 mV/g | 20 mV/g (40 mV/g via g-select) |
| Y-Axis Sensitivity | 40 mV/g | 40 mV/g | 80 mV/g | 66 mV/g | 40 mV/g |
| Bandwidth | 400 Hz | 400 Hz | 400 Hz | 400 Hz | 400 Hz |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| g-Select Pin | Yes | Yes | Yes | Yes | Yes (different tap) |
| Automotive Grade | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
关键差异点
- Wide dual-axis full-scale range with X/Y independent sensitivities （对比 MMA3204KEG)
- Independent X and Y analog outputs with g-select tap （对比 MMA2202EG)
- AEC-Q100 qualified for under-dash and chassis mounting （对比 Industrial-only MEMS accelerometers)
设计说明
Decouple the Vdd pin with a 0.1 µF X7R ceramic capacitor placed within 5 mm of the supply pin to suppress high-frequency noise from the 5 V rail. The MMA3202EG is ratiometric with Vdd, so any ripple on the supply directly couples into the output - use a linear regulator rather than a switching converter upstream, or add a pi-fereLCUBE filter. A 10 µF bulk capacitor near the sensor further reduces low-frequency supply noise.
Route the OUTX and OUTY traces as guarded differential pairs back to the host MCU's ADC, with the guard trace tied to GND. Keep the traces short (less than 50 mm) and avoid running them parallel to switching-node traces or motor driver outputs. Place the sensor on a stable PCB region, mechanically isolated from connector stress and vibration sources, to avoid mechanically-induced measurement noise on the proof mass.
The MMA3202EG outputs are analog and bandwidth-limited to 400 Hz, so they can be sampled by a 1 kS/s ADC without additional anti-aliasing filtering. Apply a digital moving-average of 4-8 samples in the host MCU to further reduce noise on the zero-g output, especially at high temperatures where the MEMS offset drift is greatest. Verify the g-select pin is tied to a defined logic level (do not leave floating) to prevent indeterminate sensitivity during power-up.
Estimated: at 5 V supply and 25 °C ambient, the MMA3202EG draws approximately 5 mA quiescent current, so total power dissipation is roughly 25 mW - no thermal management is required. However, designers must not exceed the absolute maximum acceleration of 2000 g (mechanical shock survivability), and must allow at least 100 ms after power-up before reading the output to allow the on-chip filter and bias circuits to settle.
合规信息
RoHS compliant by exemption per DigiKey listing. AEC-Q100 qualified for automotive applications. Lead-free.
