MPXH6400AC6T1 - 20-400 kPa Absolute Pressure Sensor 8-SOIC | NXP
MPN: MPXH6400AC6T1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.63 | $7.63 |
| 10 | $7.2 | $72.00 |
| 100 | $6.4 | $640.00 |
| 500 | $5.85 | $2,925.00 |
| 1,000 | $5.25 | $5,250.00 |
MPXH6400AC6T1 Overview
An absolute pressure sensor is a transducer that measures pressure referenced to a sealed vacuum cavity rather than to ambient atmosphere, allowing the device to report absolute pressure regardless of weather, altitude, or local barometric conditions. Absolute pressure sensors belong to the broader category of piezoresistive silicon sensors -> MEMS pressure sensors -> pressure transducers -> sensor ICs, and they are widely used where altitude, vacuum, or sealed-system pressure must be measured directly.
Key features include a calibrated output span of 4.6 V across 380 kPa, a typical full-scale output of 4.8 V at 400 kPa (5 V supply), a response time of approximately 1 ms, and an operating temperature range spanning -40 C to +125 C suitable for under-hood automotive and industrial environments. The integrated signal chain eliminates the need for external amplifiers, ADC drivers, or discrete temperature-compensation networks.
The MPXH6400AC6T1 uses a piezoresistive Wheatstone-bridge sensing element fabricated with bipolar semiconductor processing, then co-integrated with a precision op-amp, bandgap reference, and calibration EEPROM-trimmed thin-film resistors. This monolithic architecture produces a ratiometric analog output that scales with supply voltage, simplifying ADC interfacing and immune to most supply-rail noise.
Typical applications include engine manifold absolute pressure (MAP) sensing, barometric pressure measurement, weather stations, HVAC controllers, medical respiratory equipment, and industrial process monitoring. The high-temperature rating makes it especially suitable for under-hood automotive ECU applications.
When designing with this sensor, place the device away from heat sources and use a 5 V regulated supply with a 0.1 uF decoupling capacitor close to the supply pin to filter noise. The output is ratiometric, so the ADC reference must be tied to the same supply to preserve accuracy across supply variations.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for evaluation and sourcing.
Drop-in alternatives for MPXH6400AC6T1 — 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 MPXH6400AC6T1 (same form factor and footprint) — differing in Accuracy, Package, Supply Voltage, Output Type, Port Style.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MPXHZ6400AC6T1
✅ Drop-In✓ In Stock
$5.25 / Unit
View Datasheet →MPXH6400AC6U
✅ Drop-In📋 Reference alternative (not in catalog)
MPXH6400A6T1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MPXH6400AC7T1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MPXH6250AC6T1
✅ Drop-In✓ In Stock
$5.95 / Unit
View Datasheet →MPXH6400AC6T1 Maximum Ratings & Electrical Characteristics
| Pressure Type | Absolute |
| Operating Pressure Range | 2.9 PSI to 58.02 PSI (20 kPa to 400 kPa) |
| Output Type | Analog Voltage (ratiometric) |
| Output Voltage Range | 0.2 V to 4.8 V (at 5 V supply) |
| Supply Voltage | 4.75 V to 5.25 V (5 V typical) |
| Port Style | Top port, male 0.13 in (3.3 mm) tube |
| Package | 8-SOIC (0.335 in, 8.50 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +125 C |
| Response Time | 1000 us (1 ms typical) |
| Calibration | On-chip, factory trimmed |
| Temperature Compensation | On-chip, integrated |
MPXH6400AC6T1 Pin Configuration
| Pin 1 | VCC — 5 V supply input |
| Pin 2 | GND — Ground |
| Pin 3 | VOUT — Analog ratiometric output (0.2 V to 4.8 V) |
| Pin 4 | NC — Not connected (per datasheet) |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
Typical Applications
MPXH6400AC6T1 is suitable for 6 applications: Engine Manifold Absolute Pressure (MAP) Sensing, Barometric Pressure and Altitude Measurement, Industrial Process Pressure Monitoring, Medical Respiratory and Vacuum Equipment, HVAC and Refrigeration System Monitoring, Weather Station and Environmental Sensing.
Engine Manifold Absolute Pressure (MAP) Sensing
The MPXH6400AC6T1 fits engine MAP sensing because its 20-400 kPa range spans atmospheric pressure (~100 kPa) plus turbo boost, and its ratiometric 0.2-4.8 V analog output interfaces directly to automotive ECU ADCs. Its -40 C to +125 C operating range handles under-hood temperatures without derating, and the on-chip factory calibration removes module-level trim. Placed on the intake manifold via the top pressure port, it feeds the ECU's fueling and ignition strategy. The 1 ms response time is sufficient for 4-stroke engine control loops running at hundreds of RPM.
Recommended
Barometric Pressure and Altitude Measurement
The MPXH6400AC6T1's absolute (vacuum-referenced) sensing and 20-400 kPa span make it well suited for barometric pressure and altitude measurement in weather stations, GPS augmentation, and drone flight controllers. With the standard pressure-to-altitude barometric formula, the device can resolve altitude changes of better than 1 meter near sea level. The ratiometric output simplifies battery-powered designs where the supply is not perfectly regulated. On-chip temperature compensation maintains reading stability across diurnal weather swings.
Recommended
Industrial Process Pressure Monitoring
The MPXH6400AC6T1 fits sealed-system pressure monitoring in industrial pneumatic and hydraulic equipment where pressures reach several atmospheres. Its 8-SOIC top-port package with 3.3 mm tubing mating accepts standard pneumatic fittings, and the 400 kPa upper limit covers most low-pressure industrial process loops. The integrated signal chain eliminates external amplifiers and calibration, reducing BOM cost and board space. Designers can run the output directly into a 4-20 mA loop transmitter or industrial MCU ADC.
Recommended
Medical Respiratory and Vacuum Equipment
The MPXH6400AC6T1's ability to read pressures below atmospheric (vacuum) and its on-chip signal conditioning make it suitable for medical CPAP, ventilator, and suction equipment. The ratiometric output simplifies integration with battery-powered medical device ADCs, and the integrated calibration meets the precision needs of breath-delivery control loops. The high-temperature rating supports sterilization environments and continuous-duty operation. The 8-SOIC top-port package simplifies the pneumatic connection to breathing circuits.
Recommended
HVAC and Refrigeration System Monitoring
The MPXH6400AC6T1 measures refrigerant and air-side pressures in HVAC and refrigeration systems where pressures span sub-atmospheric (vacuum during pump-down) up to several bar. The 20-400 kPa range covers low-pressure R-410A and R-32 systems, and the analog output simplifies interface with legacy HVAC controllers that lack digital sensor support. The on-chip temperature compensation maintains accuracy across the wide ambient swings typical of outdoor HVAC units. The top pressure port accepts standard 3.3 mm tubing used in refrigeration service.
Recommended
Weather Station and Environmental Sensing
The MPXH6400AC6T1 provides calibrated absolute pressure readings for weather stations, environmental data loggers, and IoT sensor nodes that report barometric conditions. Its absolute (rather than gauge) reference means it reports correctly without exposing a vent port to atmosphere, simplifying weatherproof enclosure design. The ratiometric output pairs cleanly with low-power MCUs and 12-bit ADCs in battery-operated deployments. On-chip temperature compensation avoids the drift that plagues uncompensated piezoresistive elements in outdoor installations.
Recommended
Recommended Products Summary
Engineering reference data for MPXH6400AC6T1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MPXHZ6400AC6T1 | MPXH6400AC6U | MPXH6400A6T1 | MPXH6400AC7T1 | MPXH6250AC6T1 |
|---|---|---|---|---|---|---|
| Package | 8-SOIC (top port) | 8-SOIC (top port) - same | 8-SOIC (top port) - same | 8-SOIC (top port) - same | 8-SOIC (side port) - same package, different port | 8-SOIC (top port) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Pressure Range | 20-400 kPa (absolute) | 20-400 kPa (absolute) | 20-400 kPa (absolute) | 20-400 kPa (absolute) | 20-400 kPa (absolute) | 15-250 kPa (absolute) |
| Output Voltage (5 V supply) | 0.2 V to 4.8 V | 0.2 V to 4.8 V | 0.2 V to 4.8 V | 0.2 V to 4.8 V | 0.2 V to 4.8 V | 0.2 V to 4.8 V |
| Output Type | Analog ratiometric | Analog ratiometric | Analog ratiometric | Analog ratiometric | Analog ratiometric | Analog ratiometric |
| 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 Port | Top port | Top port | Top port | Top port | Side port | Top port |
Key Differentiators
- Wider pressure range than MPXH6250AC6T1 (vs MPXH6250AC6T1)
- Top port vs side port option in same family (vs MPXH6400AC7T1)
- On-chip calibrated signal chain vs discrete designs (vs Discrete piezoresistive bridge + op-amp)
Design Notes
Use a regulated 5.0 V supply with a 0.1 uF decoupling capacitor placed within 5 mm of the VCC pin. The output is ratiometric, so the ADC reference voltage MUST be derived from the same 5 V rail (not from a separate reference) to preserve calibration accuracy. If the supply is battery-derived, a low-dropout regulator such as LP2985-5.0 or TPS7A4533 is recommended. Estimated: at 5 V supply with 4 mA typical current draw, supply current contribution to battery life is 20 mW.
Do not apply pressure exceeding 400 kPa (58 PSI) - the integrated silicon diaphragm is calibrated only within the specified range and overpressure can permanently damage the sensor. For applications that may see water-hammer or pressure spikes, add a snubber or restrictor upstream. The top port accepts 3.3 mm tubing; mismatched tubing will leak. Use flexible silicone or polyurethane tubing with barbed fittings rated for the pressure range.
Place the MPXH6400AC6T1 at the edge of the PCB with the top port unobstructed; leave at least 10 mm of keep-out above the device for the pneumatic fitting. Keep the device away from PCB heat sources (power resistors, regulators, inductors) - the integrated temperature compensation corrects sensor self-heating but not external thermal gradients. Route VCC and VOUT traces with a ground guard or ground plane to minimize coupled noise.
Compliance Information
Compliance data was not present in the verified web data; consult NXP product page or latest Material Declaration for confirmation. The MPXH6400A series is automotive-derivative in heritage (originally Freescale).
