MPXM2102AST1 - 100kPa Absolute Pressure Sensor | STMicroelectronics
부품 번호: MPXM2102AST1 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.85 | $1,385.00 |
| 500 | $12.1 | $6,050.00 |
| 1,000 | $10.65 | $10,650.00 |
MPXM2102AST1 개요
A piezoresistive pressure sensor converts applied force on a silicon diaphragm into a small resistance change in an embedded Wheatstone bridge; the resulting millivolt-level differential output is directly proportional to pressure. The MPX2102 series sits in the pressure sensor -> sensor -> transducer hierarchy used in industrial, medical, and consumer systems where a clean, temperature-stable analog pressure signal is required.
Key features include 0 mV to 40 mV full-scale span (10V supply), 5.0 µV/V/kPa typical sensitivity offset, 1.0% max linearity error, and on-chip temperature compensation from 0 °C to +85 °C. The M-PAK 5-SMD module provides a single axial 0.12" (2.97 mm) tube port for vertical mounting, plus surface-mount gull-wing leads for PCB attachment and a tab for mechanical stability. The series draws ~6 mA from a 10V typical supply (16V max).
The device is a silicon piezoresistive transducer in which the diaphragm strain gauge forms one leg of a Wheatstone bridge; laser-trimmed thin-film resistors null the bridge and calibrate the temperature coefficient, removing the need for external compensation networks. The four-active-lead M-PAK pinout plus grounded tab provides clean EMI behavior when the tab is soldered to a grounded copper pour.
Typical applications include medical respiratory and patient monitoring, industrial process pressure measurement, HVAC transducers, altimeters/barometers, and portable barometric instruments. The absolute-pressure reference (vacuum sealed on the back side of the die) makes the device particularly suitable for barometric / weather-station use. The differential 0-40 mV output requires an external low-offset amplifier (e.g., instrumentation amp) for high-resolution ADC interfaces.
Design tip: use a low-noise, low-offset instrumentation amplifier (such as TI INA122 or similar) to condition the 0-40 mV bridge output, route the analog traces over a continuous ground pour, and add 0.1 µF decoupling close to the supply pin to keep switching noise out of the bridge measurement.
This page synthesizes distributor pricing, drop-in alternative sourcing from the MPX2102 family, and practical conditioning design notes not consolidated in the manufacturer datasheet, helping engineers select, source, and integrate the MPXM2102AST1 quickly.
드롭인 대체품: MPXM2102AST1 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MPXM2102AST1 (동일 폼 팩터 및 풋프린트) — 차이점: Mounting Type, Operating Pressure Range, Operating Temperature, Pressure Type, Supply Voltage.
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이 제품에는 사용 가능한 드롭인 대체품이 없습니다.
대체품 요청MPXM2102AST1 최대 정격 & 전기적 특성
| Operating Pressure (Absolute) | 20 kPa to 100 kPa (14.5 PSI max) |
| Pressure Type | Absolute |
| 출력 유형 | Wheatstone Bridge (analog, differential) |
| 출력 전압 | 0 mV to 40 mV at 10V excitation |
| 공급 전압 | 10 V typical (16 V max) |
| 공급 전류 | 6 mA typical at 10V |
| Linearity | ±1.0 % max (full scale) |
| 동작 온도 | 0 °C to +85 °C (compensated) |
| 패키지 | 5-SMD Module, M-PAK (4 leads + Tab) |
| Port Style | Top port, axial 0.12" (2.97 mm) tube |
| Port Type | Male tube |
| Termination Style | Surface Mount (gull-wing) |
| 실장 유형 | Surface Mount, top port |
| Technology | Silicon piezoresistive, on-chip temperature compensated |
| RoHS 상태 | Compliant |
| Lead-Free | Yes |
MPXM2102AST1 핀 구성
| 핀 1 | Vout+ — Bridge differential output positive |
| 핀 2 | Vs+ — Supply voltage (10 V typical) |
| 핀 3 | Vout- — Bridge differential output negative |
| 핀 4 | GND — Supply ground / bridge reference |
| 핀 5 | Tab — Metal tab - mechanical anchor and thermal/EMI ground (solder to PCB ground pour) |
일반적인 애플리케이션
MPXM2102AST1 적합 용도: 6 애플리케이션s: Medical Respiratory Monitoring, Industrial Process Pressure Measurement, Barometric / Weather Station Instruments, HVAC Airflow and Filter Monitoring, Portable Altimeter / Handheld GPS, Appliance Pressure Switch Replacement.
Medical Respiratory Monitoring
The MPXM2102AST1's 0-100 kPa absolute range covers the full pressure excursion profile of breathing circuits, CPAP machines, and ventilator flow paths, and its on-chip temperature compensation from 0-85 °C holds calibration stable across patient-room and operating-room thermal environments. The 0-40 mV differential Wheatstone bridge output is conditioned by a low-offset instrumentation amplifier (e.g., TI INA128) for 0-5 V ADC input, preserving the small 1% FS linearity of the MPX2102 die. Unlike disposable blood-pressure sensors, the AST1's surface-mount M-PAK form factor suits reusable medical transducers and OEM modules, and the top axial 2.97 mm port accepts standard silicone tubing. For designs subject to IEC 60601-1, the bridge output's differential topology inherently rejects common-mode mains interference when routed over a continuous ground pour.
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Industrial Process Pressure Measurement
The MPXM2102AST1 delivers a linear millivolt output across 20-100 kPa with ±1% FS linearity, suiting HVAC duct pressure, gas-line monitoring, and vacuum-pump feedback loops in industrial settings. Its 16 V max supply tolerance accepts a wide range of factory 24 V-derived rails after dropping through a 10 V linear regulator, and the surface-mount M-PAK package enables automated pick-and-place assembly on factory-floor controller boards. Unlike sealed gauge sensors, the absolute-pressure reference built into the die means the device tracks true atmospheric variations in process vessels, eliminating ambient drift. The 5-SMD module is rated for the same 0-85 °C compensation range that most factory enclosures span, eliminating per-unit firmware calibration in volume production. Recommended pairing: TVS diode across the supply for surge protection on long cable runs back to the PLC.
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Barometric / Weather Station Instruments
Because the MPXM2102AST1 is an absolute-pressure sensor with a vacuum reference sealed on the back of the die, it directly reports barometric pressure in standard meteorological units (hPa, mbar, inHg) without needing a separate reference port. The 20-100 kPa operating range encompasses the full atmospheric envelope from high-pressure systems to deep low-pressure storms, and the 1% FS linearity is sufficient for consumer-grade weather stations and altimeter functions in handheld GPS devices. Its 6 mA typical quiescent current at 10 V is acceptable for battery-powered outdoor weather loggers when duty-cycled by an external MOSFET, and the on-chip temperature compensation removes the secondary temp sensor often required in discrete weather designs. Recommended pairing: a microcontroller's internal 12-bit ADC or an external 16-bit ADC for sub-hPa pressure resolution.
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HVAC Airflow and Filter Monitoring
Differential pressure sensing across HVAC filters, fans, and duct constrictions is a classic application for the MPX2102 family, and the MPXM2102AST1 brings the same silicon in a surface-mount form factor for space-constrained thermostat and air-handler PCBs. The 0-40 mV output covers typical filter-loaded pressure drops of 50-250 Pa when amplified by ~40x, and the absolute reference allows the device to be referenced to either ambient or downstream duct air. The M-PAK 5-SMD package is small enough to fit inside a smart thermostat housing alongside WiFi/BLE radios, and the top axial port accepts standard 2.97 mm silicone tubing run to the duct pickup. Recommended pairing: low-cost MEMS humidity/temperature sensor on the same I2C bus for combined IAQ nodes.
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Portable Altimeter / Handheld GPS
Handheld GPS receivers, two-way radios, and outdoor navigation devices benefit from the MPXM2102AST1's absolute pressure reading for altitude computation above sea level, and its small M-PAK surface-mount package fits inside consumer-grade handheld form factors. The 0-100 kPa operating range maps to altitudes from -500 m to +9000 m after standard atmosphere conversion, well within hiking, climbing, and aviation-handheld use cases. The 0-40 mV differential output, when paired with a low-power instrumentation amplifier, draws less than 1 mA total conditioning current, extending battery life on multi-day trips. Recommended pairing: low-power MCU with integrated 12-bit ADC and on-chip temperature sensor for software-based pressure/temp compensation.
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Appliance Pressure Switch Replacement
Washing machines, dishwashers, and boiler control boards have used the MPX2102 family as a solid-state replacement for mechanical pressure switches, and the MPXM2102AST1's surface-mount M-PAK enables direct integration onto modern high-density appliance control boards. The 1% FS linearity is sufficient for water-level and steam-pressure trip-point detection, and the analog output allows the appliance MCU to implement soft-start water-filling curves rather than the bang-bang behavior of mechanical switches. The on-chip temperature compensation matches the thermal environment of an appliance cabinet, eliminating field calibration. Recommended pairing: a triac/SSR driver stage and zero-cross optocoupler to switch the mains load from the MCU-controlled threshold output.
추천
추천 제품 요약
엔지니어링 참조 데이터: MPXM2102AST1 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MPXM2102GS | MPXM2102AS | MPXV2102GP |
|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics (same) | STMicroelectronics (same) | STMicroelectronics (same) |
| Package | 5-SMD Module (M-PAK, top port) | 5-SMD Module (M-PAK, side port) | 5-SMD Module (M-PAK, top port) | 5-SMD Module (M-PAK, vertical port) |
| Pressure Type | Absolute | Absolute | Absolute | Absolute |
| Operating Pressure Range | 20-100 kPa (14.5 PSI) | 20-100 kPa | 20-100 kPa | 20-100 kPa |
| Output | 0-40 mV (10V excitation) | 0-40 mV (10V) | 0-40 mV (10V) | 0-40 mV (10V) |
| Supply Voltage | 10 V typ / 16 V max | 10 V typ / 16 V max | 10 V typ / 16 V max | 10 V typ / 16 V max |
| Supply Current | 6 mA typical | 6 mA | 6 mA | 6 mA |
| Operating Temperature | 0 °C to +85 °C | 0 °C to +85 °C | 0 °C to +85 °C | 0 °C to +85 °C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
주요 차별점
- Top axial port orientation simplifies tubing runs to the pressure source (vs MPXM2102GS (side port))
- Tape-and-reel packaging for high-volume SMT production (vs MPXM2102AS (tray))
- Absolute-pressure reference sealed on the die (vs MPXV2102GP (vertical-port variant))
설계 노트
The MPXM2102AST1 outputs a 0-40 mV differential signal at 10 V excitation, which is highly susceptible to common-mode noise and ground bounce. Use a low-offset, low-noise instrumentation amplifier (such as the TI INA128 at gain ~125x) located within 50 mm of the sensor. Route the Vout+/Vout- traces as a tightly coupled differential pair over a continuous ground pour; any break in the ground plane injects 50/60 Hz mains hum directly into the bridge output. Keep digital and analog grounds separate at the sensor, joining them only at the ADC ground pin.
Excitation ripple on the 10 V rail translates directly to the bridge output, so use a low-noise linear regulator (e.g., LT3042 or TPS7A47) rather than a switching supply for the sensor excitation. If a switching supply must be used, follow it with a pi-filter (LC + bulk + ceramic) and a ferrite bead to attenuate >100 kHz switching noise. Add a 0.1 µF ceramic decoupling capacitor within 5 mm of the Vs+ pin and a 10 µF bulk capacitor at the regulator output for low-frequency load-step rejection.
The M-PAK 5-SMD module requires the metal tab to be tied to a low-impedance ground plane for both thermal sinking and EMI shielding. Recommended land pattern: follow the manufacturer's IPC-7351 land pattern in the datasheet mechanical drawing, with at least 4 thermal vias under the tab to the inner ground plane. Avoid placing the sensor directly over digital traces, switching regulators, or magnetics; route analog signals on the opposite side of the PCB and guard-band them with ground on both sides. The 2.97 mm axial port must remain unobstructed and clear of nearby tall components that could mechanically stress the tube inlet.
Do not exceed 16 V on the supply pin, as the bridge resistors will drift and the part can be permanently damaged. Do not let the tube port become blocked with conformal coating or potting compound during board assembly - use a mask over the port during PCB wash and conformal coat steps. Always calibrate the system end-to-end (sensor + amplifier + ADC) against a known pressure reference rather than relying on datasheet typicals alone, because the 1% FS linearity spec does not include the gain error of your external amplifier.
규정 준수 정보
RoHS and REACH compliance per ST product page. Not AEC-Q100 qualified - for automotive pressure sensing choose an AEC-Q100 qualified pressure sensor. Halogen-free status not explicitly stated in verified data.
