MPXAZ4100AC6U - 20-105kPa Absolute Pressure Sensor | NXP
MPN: MPXAZ4100AC6U ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.05 | $3,025.00 |
| 1,000 | $5.45 | $5,450.00 |
MPXAZ4100AC6U Overview
An absolute pressure sensor measures pressure referenced to a sealed vacuum rather than to ambient atmosphere, distinguishing it from gauge or differential sensors. The MPXAZ4100A series belongs to the broader transducer family, which converts physical quantities (pressure, temperature, acceleration) into electrical signals. Absolute pressure sensors are essential wherever a known vacuum reference is required - most prominently in engine control units where manifold pressure directly correlates with air mass and load.
The MPXAZ4100AC6U integrates a single-chip MEMS piezoresistive bridge plus a custom ASIC that performs offset, span and temperature compensation. Media-resistant gel protects the die from harsh automotive intake environments, while the top-port 1/8" (3.17 mm) tube inlet accepts a vertical hose attachment typical of MAP installations. The ratiometric analog output simplifies ADC sampling with the same 5 V reference used by most engine ECUs.
Typical applications include automotive engine manifold absolute pressure (MAP) sensing, barometric pressure correction, HVAC pressure monitoring, and industrial pneumatic control. Its 0-85 °C compensated range with extended survivability to 125 °C allows under-hood placement.
Designers should route the analog output through an RC low-pass filter before ADC sampling to reject EMC events typical in automotive environments. Use a 100 nF decoupling capacitor close to the supply pin and ensure the hose inlet is oriented vertically to prevent condensate pooling that could damage the gel-protected die.
This page synthesizes distributor pricing, drop-in alternative MPXs, and application guidance that complements but is not a substitute for the manufacturer datasheet.
Drop-in alternatives for MPXAZ4100AC6U — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MPXAZ4100AC6U (same form factor and footprint) — differing in Termination Style, Operating Pressure Range, Output Type, Accuracy, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MPXAZ4100A6U
✅ Drop-In✓ In Stock
$9.3 / Unit
View Datasheet →MPXA4100AC6U
✅ Drop-In✓ In Stock
$10.75 / Unit
View Datasheet →MPXAZ4100A6T1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MPXAZ4100AC6T1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MPXAZ4100AC6U Maximum Ratings & Electrical Characteristics
| Pressure Type | Absolute |
| Operating Pressure Range | 2.9 PSI to 15.23 PSI (20 kPa to 105 kPa) |
| Output Type | Analog Voltage (ratiometric) |
| Output Voltage Range | 0.3 V to 4.9 V |
| Supply Voltage | 4.85 V to 5.35 V |
| Port Style | Male 0.13 in (3.17 mm) Tube, Top Port |
| Package / Case | 8-SMD, Gull Wing, Top Port |
| Termination Style | Surface Mount (PCB) |
| Operating Temperature | -40 °C to +125 °C |
| Compensated Temperature | 0 °C to 85 °C |
| Mounting Feature | Surface Mount |
| Sensor Type | Piezoresistive Silicon MEMS |
| Signal Conditioning | On-chip (amplified, calibrated, temperature-compensated) |
| Media Protection | Media-resistant gel |
| Automotive Qualified | Yes (engine control / MAP sensing) |
MPXAZ4100AC6U Pin Configuration
| Pin 1 | Vs — Voltage supply (5 V nominal) |
| Pin 2 | GND — Ground |
| Pin 3 | Vout — Analog ratiometric output |
| Pin 4 | NC — Not connected (per datasheet) |
| Pin 5 | PAD — Mechanical / thermal pad |
| Pin 6 | PAD — Mechanical / thermal pad |
| Pin 7 | PAD — Mechanical / thermal pad |
| Pin 8 | PAD — Mechanical / thermal pad (port-side) |
Typical Applications
MPXAZ4100AC6U is suitable for 6 applications: Automotive Engine MAP Sensing, Barometric Pressure Correction, HVAC Refrigerant Line Monitoring, Industrial Pneumatic Control, Altitude / Barometric Data Loggers, Medical Respiratory Pressure Monitoring.
Automotive Engine MAP Sensing
The MPXAZ4100AC6U is the canonical NXP manifold absolute pressure sensor for port-fuel-injection and GDi engine control units. Its 20-105 kPa range maps cleanly onto intake pressures from wide-open-throttle vacuum to atmospheric boost, and the ratiometric 0.3-4.9 V output feeds directly into the ECU's 5 V ADC reference without level translation. The media-resistant gel protects the MEMS bridge from fuel vapor, oil aerosol and condensed moisture in the intake tract. The -40 to +125 °C operating envelope and AEC-qualified construction make it drop-in ready for under-hood ECU designs.
Recommended
Barometric Pressure Correction
The MPXAZ4100AC6U's 20-105 kPa absolute span and 0.3-4.9 V output provide a direct read of atmospheric pressure for barometric correction in motorcycle, scooter and small-engine ECUs. Its top-port 3.17 mm tube accepts a vented reference line routed to a static-air zone, and the on-chip temperature compensation holds accuracy across the 0-85 °C compensated band. Designers typically pair it with a separate intake MAP sensor and use the higher of the two readings as the barometric reference at key-on.
Recommended
HVAC Refrigerant Line Monitoring
In commercial HVAC systems the MPXAZ4100AC6U can monitor low-side refrigerant pressures where the absolute operating range overlaps with suction-line conditions (typically 50-100 kPa absolute for R-410A low side). Its small 8-SMD footprint fits inside the service-valve electronics module, and the ratiometric output simplifies sampling across varying supply rails. Designers should keep the gel-protected port away from direct liquid refrigerant exposure and use a vapor-side tap instead.
Recommended
Industrial Pneumatic Control
The MPXAZ4100AC6U suits low-pressure pneumatic systems operating between 20 kPa and 105 kPa absolute, such as vacuum-pick-and-place handlers, leak-test fixtures and clean-room pressure monitors. Its ratiometric analog output pairs with industrial 24-bit sigma-delta ADCs over a 0-5 V input range, and the on-chip calibration removes the need for system-level offset/span trim. The top-port hose inlet connects directly to 3.17 mm ID tubing common in pneumatic panels.
Recommended
Altitude / Barometric Data Loggers
Handheld barometric loggers, weather stations and drone altimeters can use the MPXAZ4100AC6U's 20-105 kPa range to resolve altitude from sea level to roughly 15,000 ft (≈57 kPa). The 0.3-4.9 V output gives ~46 mV/kPa sensitivity at 5 V supply, which after a 12-bit ADC yields about 2 Pa LSB - adequate for weather-barometric resolution. Designers should isolate the port from wind/Wake effects with a static-air baffle.
Recommended
Medical Respiratory Pressure Monitoring
Low-cost CPAP and spirometer reference designs use the MPXAZ4100AC6U as a secondary absolute pressure reference where a sealed vacuum reference is required for differential flow calculations. Its low 0.3 V zero-pressure offset and calibrated 4.9 V full-scale output simplify biopole evaluation. The media-resistant gel isolates the MEMS die from humidified breathing-circuit gas, an advantage over non-gel alternatives that fail under condensate exposure.
Recommended
Recommended Products Summary
Engineering reference data for MPXAZ4100AC6U — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MPXAZ4100A6U | MPXA4100AC6U | MPXAZ4100A6T1 | MPXAZ4100AC6T1 |
|---|---|---|---|---|---|
| Package | 8-SMD, Gull Wing, Top Port | 8-SMD, Gull Wing, Top Port - same | 8-SMD, Gull Wing, Top Port - same | 8-SMD, Gull Wing, Top Port - same | 8-SMD, Gull Wing, Top Port - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Pressure Range | 20-105 kPa (2.9-15.23 PSI) | 20-105 kPa - identical | 20-105 kPa - identical | 20-105 kPa - identical | 20-105 kPa - identical |
| Output Voltage | 0.3 V to 4.9 V | 0.3 V to 4.9 V - identical | 0.3 V to 4.9 V - identical | 0.3 V to 4.9 V - identical | 0.3 V to 4.9 V - identical |
| Supply Voltage | 4.85 V to 5.35 V | 4.85 V to 5.35 V - identical | 4.85 V to 5.35 V - identical | 4.85 V to 5.35 V - identical | 4.85 V to 5.35 V - identical |
| Media-Resistant Gel | Yes (Z suffix) | Yes (Z suffix) - identical | No (gel-less) - differs | Yes (Z suffix) - identical | Yes (Z suffix) - identical |
| Packaging | Tube | Tube - identical | Tube - identical | Tape & Reel (T1) | Tape & Reel (T1) |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C - identical | -40 °C to +125 °C - identical | -40 °C to +125 °C - identical | -40 °C to +125 °C - identical |
Key Differentiators
- Media-resistant gel on same die/pinout (vs MPXA4100AC6U (gel-less))
- Drop-in compatibility with all MPXAZ4100A C6U variants (vs MPXAZ4100AC6T1)
- Tape-and-reel upgrade path within same family (vs MPXAZ4100A6U)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of the Vs pin (pin 1) and a bulk 1 µF tantalum or ceramic on the supply trace. Keep the analog output trace short and routed over a continuous ground plane to reject ECU switching noise. The exposed port-side pads (pins 5-8) must be soldered to a sufficiently large copper pour to provide mechanical stability against hose-induced stress.
Add a first-order RC low-pass filter (1 kΩ + 100 nF, fc ≈ 1.6 kHz) on Vout before the ADC to attenuate EMC events without materially affecting the 46 mV/kPa signal. Sample the ADC at >10× the filter cutoff and average 4-16 samples for stable MAP readings. Use the same 5 V rail as the ADC reference to leverage the ratiometric output of the MPXAZ4100AC6U and cancel supply-rail drift.
Do not use the gel-less MPXA4100AC6U in direct contact with intake gas or liquid media - moisture ingress will degrade the MEMS die. Always orient the top port vertically upward to prevent condensate pooling, and route the hose with a downward loop to divert liquid away from the sensor port. Exceeding the 5.35 V supply maximum will permanently damage the on-chip ASIC and shift output calibration.
Although the part is rated to +125 °C, the calibrated accuracy band is only 0-85 °C. For under-hood placement near exhaust manifolds, apply a heat sink or thermal barrier to keep the package within the compensated band; otherwise expect a few percent accuracy loss at extreme cold-crank or high-load conditions.
Compliance Information
AEC-Q100 qualified for engine control / automotive under-hood. RoHS/REACH/halogen/conflict-mineral data not present in the provided snippets and require cross-checking the NXP datasheet.
