MPXA4100A6U - 20-105kPa Absolute Pressure Sensor
MPN： MPXA4100A6U ✓ 啟用中MPXA4100A6U 概覽
An absolute pressure sensor is a transducer that measures pressure referenced to a sealed vacuum rather than to ambient atmospheric pressure. As a board-mount sensor with on-chip signal conditioning, temperature compensation, and calibration, the MPXA4100A6U belongs to the broader category of MEMS pressure sensors (micro-electro-mechanical systems) used in automotive engine control, environmental monitoring, and industrial process control hierarchies where reliable absolute pressure measurement is required.
Key features of the MPXA4100A6U include a transfer function of 54 mV/kPa, an accuracy of approximately +/-1.5% over 0 to 85 C, an operating temperature range of -40 C to +125 C, and a single 5 V supply (4.85 V to 5.35 V). The on-chip ASIC normalizes the raw piezoresistive bridge signal and applies factory calibration, eliminating the need for external compensation components. The output is ratiometric to Vcc, which improves noise immunity in noisy electrical environments.
The sensor integrates a silicon MEMS diaphragm with a Wheatstone piezoresistive bridge and a bipolar ASIC for signal conditioning. The bridge converts mechanical deflection into a differential voltage, while the ASIC amplifies, calibrates, and temperature-compensates the signal to produce a near-linear voltage output. The sealed vacuum reference underneath the diaphragm provides absolute pressure measurement independent of ambient conditions.
Typical applications include automotive manifold absolute pressure (MAP) sensing in engine control units, barometric pressure measurement for altitude correction, HVAC pressure monitoring, and industrial pneumatic system control. The wide temperature range and calibrated output make it suitable for under-hood automotive applications where PCB space is constrained and external compensation components are undesirable.
When designing with this device, ensure the supply is well-regulated within 4.85 V to 5.35 V for specified accuracy. The output is ratiometric to Vcc, so any supply noise will scale with the output. Decoupling capacitors (typically 100 nF) close to Vcc and GND pins are recommended to suppress high-frequency supply noise.
This page synthesizes distributor pricing, drop-in alternatives from the MPX4100A series, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 MPXA4100A6U — 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。
此系列的變體
與下列產品可直接替換的同系列型號： MPXA4100A6U （相同外形與佔位） — 差異在於 Output Type, Accuracy, Package / Case, Mounting Type, Operating Pressure Range.
MPXAZ4100A6U
✅ 直接替換聯絡詢價
查看資料表 →MPX4115A6U
✅ 直接替換📋 參考替代品（不在目錄中）
MPXA4100A
✅ 直接替換📋 參考替代品（不在目錄中）
MPX4100A
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MPXA4100A7U
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MPXA4100A6U 最大額定值與電氣特性
| Pressure Type | Absolute (Manifold Absolute Pressure) |
| Operating Pressure Range | 20 kPa to 105 kPa (2.9 PSI to 15.23 PSI) |
| Maximum Overload Pressure | 16.7 PSI (per distributor listing) |
| 輸出電壓範圍 | 0.3 V to 4.9 V |
| 輸出類型 | Analog voltage, ratiometric to Vcc |
| Transfer Function | 54 mV/kPa |
| 供應電壓 | 4.85 V to 5.35 V (5 V typical) |
| 工作溫度 | -40 C to +125 C |
| Port Style | Vertical (axially aligned to package) |
| 封裝 / 外殼 | 8-SMD Module (SOP with port) |
| 安裝類型 | Surface Mount |
| Technology | Piezoresistive (MEMS silicon) |
| On-Chip Signal Conditioning | Yes (calibrated and temperature compensated) |
MPXA4100A6U 腳位配置
| 腳位 1 | NC — Not connected (per datasheet) |
| 腳位 2 | NC — Not connected (per datasheet) |
| 腳位 3 | Vcc — 5 V supply (4.85 V to 5.35 V) |
| 腳位 4 | GND — Ground |
| 腳位 5 | NC — Not connected (per datasheet) |
| 腳位 6 | NC — Not connected (per datasheet) |
| 腳位 7 | Vout — Analog output (0.3 V to 4.9 V) |
| 腳位 8 | NC — Not connected (per datasheet) |
典型應用
MPXA4100A6U 適用於 6 應用s: Automotive Manifold Absolute Pressure (MAP) Sensing, Barometric Pressure Measurement for Altitude Correction, HVAC Pressure Monitoring, Industrial Pneumatic System Control, Weather Stations and Environmental Monitoring, Dataloggers and Telematics.
Automotive Manifold Absolute Pressure (MAP) Sensing
Why this part fits: The MPXA4100A6U's 20-105 kPa absolute range directly covers the manifold pressure window of naturally aspirated gasoline engines, where manifold vacuum at idle (~30 kPa) and atmospheric pressure (~100 kPa) set the operating envelope. The 54 mV/kPa transfer function and 0.3-4.9 V analog output feed directly into an ECU ADC without external gain stages. How it is used: The sensor mounts on the intake manifold via a vacuum hose to the vertical port; the ECU converts Vout to kPa using the calibration curve and uses it to compute engine air mass. The ratiometric output tracks Vcc variation, so a regulated 5 V supply preserves accuracy under cranking and load-dump transients.
推薦
Barometric Pressure Measurement for Altitude Correction
Why this part fits: The MPXA4100A6U's 20-105 kPa range spans the full sea-level-to-altitude barometric pressure window (101.3 kPa sea level down to ~70 kPa at 3000 m), and its calibrated output removes the need for software compensation. The -40 C to +125 C range supports outdoor and automotive underhood environments. How it is used: Mounted on the engine control board or weather station PCB, the sensor outputs a voltage proportional to local barometric pressure; a microcontroller reads the ADC and applies altitude correction to GPS, engine timing, or environmental telemetry. The 8-SMD footprint simplifies integration into compact IoT and telematics enclosures.
推薦
HVAC Pressure Monitoring
Why this part fits: HVAC refrigerant and air-handling systems operate in the 0-100 kPa range, which the MPXA4100A6U's 20-105 kPa span comfortably accommodates. The on-chip temperature compensation eliminates drift across the -40 C to +125 C operating range, critical for rooftop and outdoor HVAC units. How it is used: Installed in the air duct or refrigerant line, the sensor's analog output feeds a microcontroller that drives variable-speed fans or compressor inverters. The 5 V single-supply simplifies power design in 24 VAC-powered HVAC controllers when rectified and regulated locally.
推薦
Industrial Pneumatic System Control
Why this part fits: Factory pneumatic systems typically operate at 0-100 kPa, well within the MPXA4100A6U's 20-105 kPa window. The calibrated 0.3-4.9 V output interfaces directly with industrial PLC analog inputs without signal conditioning. How it is used: Mounted at manifold points along a pneumatic line, the sensor provides feedback to a PLC or industrial controller that regulates solenoid valves and actuators. The 8-SMD package supports high-density manifold PCB designs where multiple pressure points are monitored.
推薦
Weather Stations and Environmental Monitoring
Why this part fits: The MPXA4100A6U's absolute pressure reference and calibrated output make it a low-cost alternative to dedicated barometric modules for hobbyist and prosumer weather stations. The 54 mV/kPa sensitivity produces a large signal swing that simplifies low-resolution ADC readings. How it is used: Combined with temperature and humidity sensors, the MPXA4100A6U provides a third environmental axis; firmware converts voltage to hPa using the calibrated transfer function. The vertical port orientation accepts a flexible tube for enclosure-mounted designs.
推薦
Dataloggers and Telematics
Why this part fits: Telematics devices that log vehicle or environmental data benefit from the MPXA4100A6U's small 8-SMD footprint, calibrated output, and wide operating temperature. The absolute pressure reference is unaffected by enclosure altitude or weather, ideal for cross-fleet comparisons. How it is used: Mounted inside a telematics box, the sensor records manifold or ambient pressure at intervals and transmits aggregated data over cellular or satellite links. The 5 V supply is easily derived from a 12 V battery rail via a small LDO.
推薦
推薦產品摘要
工程參考資料，適用於 MPXA4100A6U — 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 | MPXAZ4100A6U | MPX4115A6U | MPXA4100A | MPX4100A | MPXA4100A7U |
|---|---|---|---|---|---|---|
| Package | 8-SMD Module (vertical port) | 8-SMD Module (vertical port) - same | 8-SMD Module (vertical port) - same | 8-SMD Module (different case) - same | 8-SMD Module (basic case) - same | 8-SMD Module (horizontal port) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Pressure Range | 20-105 kPa (2.9-15.23 PSI) | 20-105 kPa (2.9-15.23 PSI) | 0-115 kPa (0-16.7 PSI) | 20-105 kPa (2.9-15.23 PSI) | 20-105 kPa (2.9-15.23 PSI) | 20-105 kPa (2.9-15.23 PSI) |
| Output Voltage | 0.3 V to 4.9 V | 0.3 V to 4.9 V | 0.2 V to 4.8 V | 0.3 V to 4.9 V | 0.3 V to 4.9 V | 0.3 V to 4.9 V |
| Transfer Function | 54 mV/kPa | 54 mV/kPa | 46 mV/kPa | 54 mV/kPa | 54 mV/kPa | 54 mV/kPa |
| Supply Voltage | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 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 +125 C |
| Pressure Reference | Absolute (vacuum reference) | Absolute | Absolute | Absolute | Absolute | Absolute |
| Port Style | Vertical | Vertical | Vertical | Vertical/case dependent | Vertical/case dependent | Horizontal |
| Screening Variant | Standard grade | Higher-grade/lot-screened | Standard grade | Standard grade | Standard grade | Standard grade |
主要差異化特點
- Pin-compatible with higher-pressure MPX4115A6U (對比MPX4115A6U)
- Available in higher-screened MPXAZ variant (對比MPXAZ4100A6U)
- Calibrated output eliminates external compensation (對比Discrete piezoresistive bridge)
設計說明
The MPXA4100A6U requires a regulated 5 V supply within 4.85 V to 5.35 V. Use a low-noise LDO such as LP2985 or a switching regulator followed by an LC filter, and place a 100 nF decoupling capacitor as close to the Vcc pin as possible. Because the output is ratiometric to Vcc, any supply noise above ~50 kHz couples directly into the pressure reading - add a bulk 10 uF cap if the supply is shared with switching circuitry.
The 8-SMD module uses a vertical port that requires clearance above the PCB for a vacuum hose or barbed fitting. Reserve at least 8 mm of vertical headroom and avoid placing tall components within 5 mm of the port opening. The package has a sealed vacuum reference on the back side; do not expose this side to conformal coating or mechanical stress, which can shift the absolute pressure calibration.
Do not assume the transfer function is exact across all units without calibration - lot-to-lot variation is typically +/-2% before factory calibration. Avoid exposing the sensor to pressures above 16.7 PSI without confirming the maximum overload rating, as diaphragm damage can permanently shift the output. The output is ratiometric; do not compare two sensors powered from different Vcc rails without accounting for the scaling factor Vcc / 5.0 V.
Route the analog output trace away from switching converter nodes and high-current traces to minimize coupled noise. Add an RC low-pass filter (10 kohm + 100 nF, fc ~160 Hz) at the ADC input if the host samples below 1 kHz to reject HVAC and motor-induced noise. Keep the ground return path short and use a ground plane under the sensor body to stabilize the ratiometric output.
合規資訊
Compliance status not provided in the verified web data; verify with NXP's product environmental compliance page or a lot-specific material declaration before automotive production use.
