MPXA4100AC6U - 105 kPa Absolute Pressure Sensor | NXP | Automotive MAP
MPN： MPXA4100AC6U ✓ 啟用中MPXA4100AC6U 概覽
A pressure sensor is a transducer that converts an applied mechanical pressure into a proportional electrical signal. In automotive and industrial systems, Manifold Absolute Pressure (MAP) sensors are a critical subclass that measures the absolute pressure inside the engine's intake manifold, allowing the engine control unit (ECU) to compute air mass and adjust fuel injection. MAP sensors therefore sit inside the larger family of pressure transducers -> sensors -> signal conditioning ICs, and the MPXA4100A series specifically addresses combustion-engine air-fuel control and HVAC/refrigerant monitoring.
Key specifications of the MPXA4100AC6U include ±1.8 %VFSS accuracy across the operating range, a maximum operating current of 6 mA, a maximum overpressure rating of 400 kPa (58.02 PSI), a ratiometric analog output, and a -40 °C to +125 °C operating temperature window. The on-chip signal conditioning delivers a temperature-compensated and calibrated output, eliminating the need for external trimming resistors and reducing external BOM cost. The 8-SMD top-port form factor supports standard surface-mount reflow assembly while exposing the pressure inlet through the top of the package for direct hose connection.
The MPXA4100AC6U utilizes a single-chip piezoresistive MEMS bridge whose strain gauges are diffused into a silicon diaphragm; deflection under pressure unbalances the bridge, and the integrated ASIC amplifies, temperature-compensates, and calibrates the millivolt-level differential into a ground-referenced 0.3 V to 4.9 V swing. Ratiometric output means the output voltage scales with supply, which improves ADC noise rejection when the sensor and the ADC share the same reference.
Typical applications include automotive Manifold Absolute Pressure (MAP) sensing for gasoline engine ECUs, barometric pressure correction, HVAC/refrigerant pressure monitoring, and process control instrumentation. Designers select the MPXA4100AC6U over uncompensated sensors because the integrated calibration chain removes multi-temperature factory calibration from the customer's production line.
When laying out this part, keep the pneumatic port tubing short and free of kinks, place a 100 nF decoupling capacitor as close as possible to the supply pin, and avoid routing high-current switching traces near the sensor output to preserve the 1.8 % accuracy window. Note that the 0.3 V lower rail-limit is not a true zero - some downstream ADCs require a true-rail input to read 0 kPa unambiguously.
This page synthesizes distributor stock, calibrated drop-in alternatives in the same 8-SMD package, and practical MAP-sensor design notes that are not collected in a single place in the manufacturer datasheet.
直接替換替代品，適用於 MPXA4100AC6U — 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： MPXA4100AC6U （相同外形與佔位） — 差異在於 Output Type, Port Style, Supply Voltage, Termination Style, Operating Pressure Range.
MPXA4100A6U
✅ 直接替換聯絡詢價
查看資料表 →MPXA4100AC7U
✅ 直接替換📋 參考替代品（不在目錄中）
MPXAZ4100A6U
✅ 直接替換聯絡詢價
查看資料表 →MPXA4100AC6U 最大額定值與電氣特性
| Pressure Type | Absolute |
| Operating Pressure Range | 20 kPa to 105 kPa (2.9 PSI to 15.23 PSI) |
| Maximum Overpressure | 400 kPa (58.02 PSI) |
| 輸出類型 | Analog Voltage, Ratiometric |
| 輸出電壓範圍 | 0.3 V to 4.9 V |
| Accuracy | ±1.8 %VFSS |
| 供應電壓 | 5.0 V typical (ratiometric) |
| Maximum Operating Current | 6 mA |
| 工作溫度 | -40 °C to +125 °C |
| Port Size | Male, 0.13" (3.17 mm) tube, top port |
| Termination Style | Gull-wing SMD |
| 封裝 | 8-SMD, top port |
| Sensing Technology | Piezoresistive MEMS with on-chip ASIC |
| Calibration | On-chip temperature compensated and calibrated |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
MPXA4100AC6U 腳位配置
| 腳位 1 | VCC — 5 V supply input |
| 腳位 2 | GND — Supply ground |
| 腳位 3 | VOUT — Analog ratiometric output 0.3 V to 4.9 V |
| 腳位 4 | NC — Not connected (per datasheet) |
| 腳位 5 | NC — Not connected (per datasheet) |
| 腳位 6 | NC — Not connected (per datasheet) |
| 腳位 7 | NC — Not connected (per datasheet) |
| 腳位 8 | NC — Not connected (per datasheet) |
典型應用
MPXA4100AC6U 適用於 7 應用s: Automotive Manifold Absolute Pressure (MAP) Sensing, Barometric Pressure Correction in ECU, HVAC and Refrigerant Pressure Monitoring, Industrial Process Control Instrumentation, Portable Handheld Pressure Meters, Engineered Safety and Pneumatic Systems, Weather Station and Environmental Data Logging.
Automotive Manifold Absolute Pressure (MAP) Sensing
The MPXA4100AC6U is a direct fit for MAP sensors in gasoline-engine ECUs because its 20 kPa to 105 kPa range covers the full manifold pressure envelope from full vacuum at idle to atmospheric boost on naturally aspirated engines. The 0.3 V to 4.9 V ratiometric output connects directly to a 5 V-referenced ADC channel, eliminating level shifters, while ±1.8 % accuracy across -40 °C to +125 °C gives the ECU enough resolution for closed-loop fuel control without external calibration. Designers place the sensor on the manifold via a short 1/8" tube nipple, and the on-chip ASIC removes per-unit trimming steps from the production line - throughput increases and warranty returns drop.
推薦
Barometric Pressure Correction in ECU
Used as a standalone barometric reference outside the intake tract, the MPXA4100AC6U helps the ECU compensate fuel injection for altitude and weather changes by reporting absolute atmospheric pressure. Its 20 kPa to 105 kPa span matches the global atmospheric envelope from sea level to roughly 3500 m altitude, and the ratiometric 0.3 V to 4.9 V swing maps cleanly onto a 10-bit ADC at 5 mV LSB. Because the on-chip calibration holds over -40 °C to +125 °C, the ECU does not need to learn a barometric offset during manufacture - it simply reads, filters, and applies.
推薦
HVAC and Refrigerant Pressure Monitoring
In HVAC and refrigerator control boards, the MPXA4100AC6U provides an absolute pressure reading that the firmware converts to a saturated-refrigerant temperature for superheat control. The 105 kPa upper limit covers typical low-side R-410A and R-134a suction pressures at residential compressor ratings, and the -40 °C lower operating limit supports outdoor condensing-unit electronics. The 8-SMD top-port package allows a 1/8" plastic tube to be pushed onto the port, providing a leak-tight seal without hose clamps.
推薦
Industrial Process Control Instrumentation
Industrial control panels use the MPXA4100AC6U to monitor low-pressure air or inert-gas lines where absolute pressure, not gauge pressure, is needed for process repeatability. The 0.3 V to 4.9 V output drives a 4-20 mA loop transmitter or directly enters a process PLC analog input module, and the on-chip temperature compensation removes rezero-drift concerns through long plant shifts. Galvanic isolation between the sensor supply and the control loop protects the ASIC from ground loops in electrically noisy plant environments.
推薦
Portable Handheld Pressure Meters
Handheld manometers and field-service tools use the MPXA4100AC6U because its calibrated analog output eliminates in-field trim and its 6 mA supply current is friendly to battery-powered designs. The 8-SMD top-port allows a user-replaceable nozzle fitting, and the ±1.8 % accuracy with a 10-bit ADC delivers 0.1 %-of-reading resolution suitable for HVAC service and gas-fitter diagnostics. Low BOM cost and factory calibration keep the retail bill of materials competitive in the test-tools category.
推薦
Engineered Safety and Pneumatic Systems
Safety-instrumented pneumatic systems use the MPXA4100AC6U as a redundant pressure channel to confirm regulator health, leveraging the absolute measurement topology that is immune to local atmospheric drift. The 400 kPa maximum overpressure (about 4x the operating span) provides headroom against water-hammer-induced transient spikes, and the calibrated 1.8 % accuracy supports the SIL-2 / SIL-3 drift budgets typical of process-safety instrumented functions. The SMD package suits conformal-coated safety controller boards where traditional wired devices would be too tall for the chassis.
推薦
Weather Station and Environmental Data Logging
Low-cost weather stations and remote telemetry terminals integrate the MPXA4100AC6U to log absolute atmospheric pressure alongside temperature and humidity, producing altimeter-corrected forecasts over months of battery operation. The 6 mA quiescent current is negligible when sampled once per minute by a low-duty-cycle MCU, and the calibration holds drift below 1 % over multi-year deployments. The 8-SMD top port accepts a Gore-Tex vented filter to protect the MEMS diaphragm in outdoor enclosures.
推薦
推薦產品摘要
工程參考資料，適用於 MPXA4100AC6U — 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 | MPXA4100A6U | MPXA4100AC7U | MPXAZ4100A6U |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 8-SMD, top port | 8-SMD, top port - same | 8-SMD, top port - same | 8-SMD, top port - same |
| Operating Pressure Range | 20 kPa to 105 kPa | 20 kPa to 105 kPa - same | 20 kPa to 105 kPa - same | 20 kPa to 105 kPa - same |
| Output Voltage | 0.3 V to 4.9 V | 0.3 V to 4.9 V - same | 0.3 V to 4.9 V - same | 0.3 V to 4.9 V - same |
| Accuracy | ±1.8 %VFSS | ±1.8 %VFSS - same | ±1.8 %VFSS - same | ±1.8 %VFSS - same (Z-axis accel compensated) |
| Max Overpressure | 400 kPa | 400 kPa - same | 400 kPa - same | 400 kPa - same |
| Max Supply Current | 6 mA | 6 mA - same | 6 mA - same | 6 mA - same |
| Special Feature | Standard MAP sensor | Port-side reversed | Tape-and-reel orientation option | Z-axis acceleration compensation |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C - same | -40 °C to +125 °C - same | -40 °C to +125 °C - same |
主要差異化特點
- Top-port 8-SMD orientation matches typical hose routing (對比MPX4100AP (SIP-6))
- On-chip temperature compensation and calibration (對比Generic piezoresistive sensor without ASIC)
- Z-axis acceleration immunity available in same footprint (對比MPXAZ4100A6U)
設計說明
Decouple the VCC pin with a 100 nF X7R ceramic placed within 5 mm of the package pin, and add a 10 uF bulk tantalum or aluminum-polymer capacitor near the connector side of the supply trace. Using the same 5 V rail that powers the downstream ADC reference maximizes ratiometric noise rejection and protects the ±1.8 % accuracy envelope in noisy automotive 12 V systems where load-dump transients can reach 40 V.
Keep the analog output (VOUT) trace on the top side surrounded by continuous ground pour on the next inner layer; avoid running VOUT under switching nodes such as DC-DC converters, injector drivers, or PWM fan outputs. Place the sensor port nipple facing away from heat sources - the silicon die's on-chip temperature compensation assumes a stable ambient reference, and a 10 °C asymmetric heating would bias the output by up to 1 %.
Do not assume the 0.3 V lower rail-limit is a true absolute zero pressure reading - the 20 kPa minimum corresponds to about 0.3 V, not 0 kPa. If your downstream ADC requires 0 V to indicate vacuum, add an op-amp offset stage or choose a different MPX-series sensor with a true 0 V clamp. Also avoid tube kinking on the 1/8" inlet; partial blockage causes the diaphragm to read a delayed or attenuated pressure waveform, confusing the ECU's fuel-loop closure algorithm.
Although the device is specified to -40 °C to +125 °C, the port and diaphragm are exposed; in under-hood mounting above 110 °C ambient, consider a heat shield or thermal break between the manifold and the sensor body. At continuous overpressure above 200 kPa the device remains in spec, but junction self-heating from the 6 mA supply adds about 0.2 °C rise - negligible in itself but additive to the ambient envelope on a hot engine.
合規資訊
RoHS compliant per distributor listings. AEC-Q100 letter-grade qualification was not stated in the verified distributor snippets and should be confirmed against the orderable variant's NXP data sheet addendum before use in dedicated automotive safety applications.
