MMA2201DR2 - 45g X-Axis Analog Accelerometer | NXP | 16-SOIC
MPN： MMA2201DR2 ✗ 停產MMA2201DR2 概覽
An accelerometer is a micro-electromechanical systems (MEMS) sensor that measures proper acceleration (the rate of change of velocity) along one or more axes and converts it into an analog voltage or digital signal. The MMA2201DR2 belongs to the analog-output accelerometer category within the broader motion sensor hierarchy: accelerometer -> motion sensor -> MEMS sensor -> semiconductor. The device uses a silicon capacitive sensing cell whose differential capacitance changes with deflection of a proof mass, producing an analog ratiometric output proportional to applied acceleration.
Key specifications include a 4.75 V to 5.25 V supply range, ratiometric analog output, 400 Hz 4-pole Butterworth low-pass filter, self-test pin for built-in diagnostics, and -40 °C to +125 °C industrial operating temperature range. The 16-SOIC package enables standard surface-mount assembly with gull-wing leads compatible with reflow soldering. Zero-g output is trimmed at the factory, eliminating the need for external potentiometers or calibration routines during board bring-up.
The MMA2201DR2 architecture combines a MEMS mechanical structure with a bipolar/CMOS signal-conditioning ASIC on the same die. The capacitive sensing element is followed by a switched-capacitor charge amplifier, demodulator, and output buffer, with the 4-pole filter implemented on-chip. This integrated approach yields a stable, low-noise analog signal without the user needing to select external filter components or gain-setting parts. Typical uses include automotive airbag systems, industrial vibration monitoring, appliance balance control, and tilt/inclination sensing where a simple analog interface is preferred.
When designing with this device, observe the 5.25 V supply-specified ceiling. Single-coil designs should use the self-test pin to validate sensor health during manufacturing and field service.
直接替換替代品，適用於 MMA2201DR2 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
MMA2201D
✅ 直接替換📋 參考替代品（不在目錄中）
MMA2201DR2G
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MMA2204DR2
✅ 直接替換📋 參考替代品（不在目錄中）
MMA2202DR2
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MMA3202DR2
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MMA2201DR2 最大額定值與電氣特性
| 感測器類型 | Accelerometer |
| Axis | X (single) |
| Acceleration Range | ±45 g |
| Sensitivity (typ) | 50 mV/g (ratiometric) |
| Bandwidth | 400 Hz (4-pole LPF) |
| 輸出類型 | Analog, ratiometric |
| 供應電壓 | 4.75 V to 5.25 V |
| Supply Current (typ) | 5 mA |
| Zero-g Output (typ) | 2.5 V at VS = 5 V |
| 工作溫度 | -40 °C to +125 °C |
| 封裝 | 16-SOIC |
| 安裝類型 | Surface Mount |
| Self-Test Pin | Yes (active high) |
| Technology | MEMS, silicon capacitive |
| RoHS 狀態 | Non-Compliant (Contains Lead) |
| Lead-Free Status | Contains Lead |
MMA2201DR2 腳位配置
| 腳位 1 | VDD — 5 V supply |
| 腳位 2 | ST — Self-test input (active high) |
| 腳位 3 | RESERVED — Reserved - do not connect |
| 腳位 4 | NC — Not connected (per datasheet) |
| 腳位 5 | GND — Ground |
| 腳位 6 | VREF — Reference voltage (2.5 V) |
| 腳位 7 | NC — Not connected (per datasheet) |
| 腳位 8 | NC — Not connected (per datasheet) |
| 腳位 9 | NC — Not connected (per datasheet) |
| 腳位 10 | NC — Not connected (per datasheet) |
| 腳位 11 | NC — Not connected (per datasheet) |
| 腳位 12 | VOUT — Analog acceleration output |
| 腳位 13 | NC — Not connected (per datasheet) |
| 腳位 14 | NC — Not connected (per datasheet) |
| 腳位 15 | NC — Not connected (per datasheet) |
| 腳位 16 | ST2 — Auxiliary self-test / reserved |
典型應用
MMA2201DR2 適用於 6 應用s: Automotive Airbag Crash Sensing, Industrial Vibration Monitoring, Appliance Balance Control, Tilt and Inclination Sensing, Hard-Drive Shock Detection, Gaming Controller Force Feedback.
Automotive Airbag Crash Sensing
The MMA2201DR2's ±45 g full-scale range and 400 Hz 4-pole low-pass bandwidth position it as a satellite crash sensor in airbag systems. Its ratiometric 50 mV/g output feeds the airbag ECU's ADC directly, and the self-test pin provides the diagnostic capability required by ISO 26262 functional-safety architectures. Industrial -40 to +125 °C operation supports under-dash mounting without thermal derating. Compared with a discrete accelerometer + op-amp chain, the integrated MMA2201DR2 reduces PCB area by approximately 60% and eliminates external filter-component selection.
推薦
Industrial Vibration Monitoring
The MMA2201DR2's 400 Hz analog bandwidth covers rotating-equipment frequencies up to several thousand RPM on pumps, motors, and fans when sampled by the host MCU. Its -40 to +125 °C industrial rating tolerates factory-floor ambient swings, and the SOIC-16 package withstands conformal coating and through-hole repair. The factory-calibrated zero-g output lets the firmware apply a single-point bias correction rather than a two-point calibration per axis. Versus a piezoelectric vibration transducer the MMA2201DR2 needs no charge amplifier and runs from a 5 V rail, simplifying mixed-signal industrial boards.
推薦
Appliance Balance Control
Washing machines and dryers use single-axis analog accelerometers like the MMA2201DR2 to detect drum imbalance before the motor controller limits spin speed, protecting bearings and reducing noise. The 400 Hz bandwidth captures the dominant imbalance harmonics for 600-1400 RPM drum speeds. The integrated 4-pole filter removes high-frequency motor drive transients, allowing the ADC to sample at 1 kHz without aliasing. Compared with discrete tilt-switch solutions the MMA280 provides proportional bal-dimming duty cycles, enabling variable-speed compensation rather than binary cut-off.
推薦
Tilt and Inclination Sensing
Static tilt/inclination measurement uses the 1 g component of Earth's gravity projected on the X-axis to compute roll or pitch angles. The MMA2201DR2's ±45 g range is overkill for 1 g applications, but its ratiometric output gives clean 2.5 V zero-g and ±2.25 V full-scale swing that maps to ±90° tilt on a single axis. In solar tracker, antenna positioner, and construction-machinery level sensors, the integrated filter removes vibration noise that would otherwise require a discrete op-amp chain. For multi-axis tilt a stacked pair of MMA2201DR2 ICs provides X/Y measurement, replacing more expensive two-axis IMUs.
推薦
Hard-Drive Shock Detection
Portable computers and external SSDs use ±45 g single-axis analog accelerometers like the MMA2201DR2 to detect drop events and park the drive head before impact. The 400 Hz bandwidth covers typical drop-acceleration pulse widths, and the ratiometric output interfaces directly to the storage ASIC's analog comparator. Its -40 to +125 °C rating supports chassis-mounted operation in laptops, while the SOIC-16 package fits a 5 mm x 10 mm board area. Compared with discrete shock sensors the integrated MMA2201DR2 eliminates firmware calibration.
推薦
Gaming Controller Force Feedback
Game controllers and VR accessories embed ±45 g single-axis analog accelerometers like the MMA2201DR2 to detect shake, gesture, and impact events for force-feedback algorithms. The 400 Hz analog bandwidth captures hand-shake and table-impact transients cleanly, and the SOIC-16 package fits inside slim controller enclosures. The factory-calibrated zero-g and sensitivity eliminate per-unit trim, which matters at consumer production volumes of millions of units per year. Versus a discrete piezoelectric impact sensor the MMA2201DR2 provides directional axis data, enabling richer gesture vocabularies.
推薦
推薦產品摘要
工程參考資料，適用於 MMA2201DR2 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MMA2201D | MMA2201DR2G | MMA2204DR2 | MMA2202DR2 | MMA3202DR2 |
|---|---|---|---|---|---|---|
| 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 | ±45 g | ±45 g | ±45 g | ±17.5 g | ±56 g | ±50 g (dual axis) |
| Sensitivity | 50 mV/g | 50 mV/g | 50 mV/g | 133 mV/g | 40 mV/g | 40 mV/g |
| Bandwidth | 400 Hz | 400 Hz | 400 Hz | 400 Hz | 400 Hz | 400 Hz |
| Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Output Type | Analog | Analog | Analog | Analog | Analog | Analog |
| Axes | X (single) | X (single) | X (single) | X (single) | X (single) | X/Y (dual) |
| Self-Test Pin | Yes | Yes | Yes | Yes | Yes | Yes |
| RoHS | Non-Compliant | Non-Compliant | Non-Compliant | Non-Compliant | Non-Compliant | Non-Compliant |
主要差異化特點
- Wider ±45 g full-scale range than MMA2204DR2 (對比MMA2204DR2)
- Single X-axis vs dual X/Y of MMA3202DR2 (對比MMA3202DR2)
- Higher sensitivity than MMA2202DR2 (對比MMA2202DR2)
設計說明
The MMA2201DR2 requires a 4.75 V to 5.25 V supply with the analog output ratiometric to that rail. Use an LDO with <50 mV noise (e.g. a TPS7A4701 or LP38690) instead of a switching regulator to avoid coupling switching noise into the 400 Hz analog signal. Place a 0.1 µF ceramic decoupling capacitor within 5 mm of the VDD pin and a 10 µF bulk capacitor at the regulator output.
Do not load VOUT with less than 100 kΩ or more than 100 nF; the output amplifier cannot drive heavy loads. Shielded cable or guard rings should be used when routing VOUT over long PCB traces, otherwise capacitive coupling injects noise. The self-test pin must be left floating or tied low during normal operation; driving it high during measurement corrupts the output.
Estimated: at VIN = 5 V and 5 mA supply current, power dissipation is approximately 25 mW, well within the SOIC-16 thermal envelope. For best EMI performance, place a ground plane under the package and keep digital traces (e.g. self-test, MCU ADC lines) at least 5 mm away. Orient the long axis of the SOIC-16 along the X-axis sensing direction.
合規資訊
MMA2201DR2 contains lead (SnPb finish) and is RoHS non-compliant per DigiChip datasheet. Originally qualified to Freescale automotive-grade standards but AEC-Q100 status not explicitly stated in distributor data - set as not_applicable. REACH and conflict-minerals compliance inferred from NXP documentation.
