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Home > Products > Sensors, Transducers > Pressure Sensors, Transducers

Infineon Technologies KP235XTMA1

Name: KP235XTMA1
Brand: Infineon Technologies
SKU: KP235XTMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KP235XTMA1

Manufacturer:: Infineon Technologies

Category:: Pressure Sensors, Transducers

Package:: 8-SMD Module

Datasheet:: KP235XTMA1.pdf

Description:: SENSOR 16.68PSIA 4.5V DSOF8-16

Quantity:: RFQ Add To RFQ list

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Inventory:10,212

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Product details

Overview

KP235 from Infineon Technologies is an analog absolute pressure sensor IC based on capacitive MEMS sensing with monolithic BiCMOS signal conditioning. It delivers ratiometric 0.5–4.5 V output over 40–115 kPa pressure range, operates from −40 °C to +125 °C, and features broken-wire detection. It is used in automotive barometric air pressure measurement for engine control and altitude compensation.

For engineers reviewing the KP235 datasheet, KP235 pinout, KP235 application, or KP235 equivalent, key selection criteria include absolute pressure accuracy (±1.2 kPa), ratiometric output stability, automotive qualification per AEC-Q100, and PG-DSOF-8-16 package compatibility with SMT reflow profiles.

Technical Context

The KP235 integrates a surface-micromachined capacitive pressure-sensing element with on-chip BiCMOS signal conditioning, including voltage reference, amplifier, and temperature compensation circuitry. Its transfer function is factory-calibrated to map 40–115 kPa linearly to 0.5–4.5 V output referenced to supply voltage.

It implements broken-wire detection by monitoring output voltage limits under open-circuit or short-circuit conditions, and supports operation across full automotive temperature range without external calibration. The ratiometric architecture ensures output scaling remains proportional to V_SUPPLY, reducing sensitivity to supply variation.

Key Specifications

Parameter	Value and Actual Design Meaning
Pressure Range	40 kPa to 115 kPa absolute - covers sea-level to ~15,000 m altitude, suitable for barometric and altimeter applications.
Output Voltage	0.5 V to 4.5 V ratiometric - scales linearly with supply voltage; enables direct ADC interfacing without external reference.
Accuracy	±1.2 kPa total error (including nonlinearity, hysteresis, tempco) - meets stringent requirements for engine ECU baro compensation.
Operating Temp	−40 °C to +125 °C - qualified for under-hood automotive use and industrial environments without derating.
Supply Voltage	4.75 V to 5.25 V - tight tolerance ensures stable internal reference and consistent output scaling.
Response Time	≤10 ms (90% step response) - sufficient for dynamic barometric tracking during vehicle ascent/descent.
Thermal Resistance	R_thJA = 120 K/W (JEDEC JESD51-2) - defines PCB thermal design margin for continuous operation at max ambient.

Pinout & Package

Package: PG-DSOF-8-16 - leadless, green-compliant, 8-pin surface-mount package with exposed thermal pad; dimensions 4.0 × 4.0 × 1.0 mm (L × W × H); RoHS and halogen-free compliant.

Pin/Terminal	Circuit Role	Design Meaning
V_SUPPLY	Positive supply input	Accepts 4.75–5.25 V; powers internal reference, oscillator, and analog signal chain.
GND	Ground reference	Common return for supply, output, and internal bias; must be low-impedance for noise immunity.
V_OUT	Analog output	Ratiometric 0.5–4.5 V signal; requires ≤10 kΩ load impedance to maintain linearity and accuracy.
NC	No connect	Internally unconnected; must remain floating - no external connection permitted.
NC	No connect	Internally unconnected; must remain floating - no external connection permitted.
NC	No connect	Internally unconnected; must remain floating - no external connection permitted.
NC	No connect	Internally unconnected; must remain floating - no external connection permitted.
NC	No connect	Internally unconnected; must remain floating - no external connection permitted.

Key Features

Feature	Design Value
Capacitive MEMS sensing element	Monolithic silicon diaphragm with integrated electrode structure - provides long-term stability and low hysteresis (<0.1 kPa).
On-chip BiCMOS signal conditioning	Includes trimmed bandgap reference, chopper-stabilized amplifier, and temperature-compensated gain/offset - eliminates need for external calibration.
Ratiometric output	Output voltage scales precisely with V_SUPPLY; removes dependency on absolute reference voltage drift in host system.
Broken-wire detection	Active fault monitoring asserts output beyond 0.5–4.5 V range upon open or short circuit - enables fail-safe diagnostics in safety-critical systems.
AEC-Q100 Grade 0 qualification	Validated for operation up to +125 °C ambient and 1000-hour HTOL stress - meets automotive powertrain and chassis requirements.

Applications

Automotive Engine Control

Portable Altimeters

Use Scenario: Real-time barometric pressure measurement for MAP-based fuel injection and turbo boost control in gasoline and diesel engines.

IC Role / Device Role / Timing Role: Primary absolute pressure transducer providing analog feedback to ECU ADC with ≤10 ms response latency.

Use Value: Enables accurate air mass calculation across wide temperature and altitude ranges, improving emissions compliance and fuel economy.

Use Scenario: Altitude estimation in handheld GPS devices and hiking watches where size, power, and accuracy are constrained.

IC Role / Device Role / Timing Role: Standalone barometric sensor feeding low-power microcontroller ADC; operates continuously at 1–10 Hz sampling.

Use Value: Delivers ±1.2 kPa accuracy corresponding to ~10 m altitude resolution at sea level, supporting reliable elevation tracking.

Industrial Weather Stations

Medical Respiratory Monitors

Use Scenario: Long-term atmospheric pressure logging in unattended outdoor environmental monitoring nodes.

IC Role / Device Role / Timing Role: Precision analog front-end with built-in temperature compensation; interfaces to 16-bit sigma-delta ADC.

Use Value: Maintains ±1.2 kPa accuracy over −40 °C to +70 °C operating range without recalibration, ensuring data integrity over seasonal cycles.

Use Scenario: Pressure monitoring in portable ventilators and CPAP machines for breath-phase detection and leak compensation.

IC Role / Device Role / Timing Role: Absolute pressure sensor measuring ambient baro reference to normalize flow and pressure readings against atmospheric changes.

Use Value: Enables automatic barometric compensation of tidal volume and PEEP settings, improving therapy consistency across geographic locations.

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog absolute pressure sensing applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BMP280 (Bosch)	Digital I²C/SPI output; ±1.0 Pa RMS noise; no broken-wire detection; lower supply current (2.7 µA standby).	Requires MCU firmware for digital interface and compensation; unsuitable where analog ratiometric simplicity is mandated.	Select BMP280 only if digital interface, lower power, and higher resolution (±0.12 hPa) outweigh need for analog integration and fault diagnostics.
MPX5700 (NXP)	Analog output; wider 0–700 kPa range; ±1.5% FS accuracy (≈±10.5 kPa); −40 °C to +125 °C; no broken-wire detection.	Designed for industrial hydraulic/pneumatic pressure; lacks barometric-grade accuracy and automotive qualification.	Choose MPX5700 only for high-pressure industrial sensing where ±10.5 kPa error is acceptable and AEC-Q100 is not required.

Compared with BMP280 and MPX5700, the KP235 uniquely combines automotive qualification, ±1.2 kPa absolute accuracy over barometric range, ratiometric analog output, and integrated broken-wire diagnostics - making it optimal for safety-aware engine management and portable altitude-critical systems.

Availability

KP235 is available at Aetrix Electronics and suitable for automotive engine control units, portable altimeters, and industrial weather stations requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for KP235 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, sensor, and automotive ICs, with global R&D and manufacturing infrastructure.

The KP235 belongs to Infineon's SensoNor® pressure sensor product line, engineered specifically for high-accuracy, automotive-grade absolute pressure measurement in harsh environments.

FAQ

Is the KP235 calibrated at the factory?

Yes, the KP235 undergoes full factory calibration across temperature and pressure range. Its transfer function (40–115 kPa → 0.5–4.5 V) is trimmed using laser and EEPROM storage for offset, gain, and temperature coefficients - no end-user calibration is required.

What is the recommended PCB layout for optimal thermal and electrical performance?

Mount the KP235 on a 2-layer board with ≥2 cm² copper pour connected to GND under the exposed thermal pad. Keep V_SUPPLY and V_OUT traces short and away from noisy digital lines. Use 100 nF ceramic decoupling capacitor placed within 2 mm of V_SUPPLY/GND pins.

Does the KP235 support operation below 4.75 V supply?

No - the datasheet specifies absolute maximum ratings and operating range strictly between 4.75 V and 5.25 V. Operation below 4.75 V may cause output saturation, loss of ratiometric behavior, or failure of broken-wire detection logic; it is not characterized or guaranteed.

How does broken-wire detection behave during normal operation?

During normal operation with proper load (≤10 kΩ), V_OUT stays strictly within 0.5–4.5 V. If the output line opens or shorts, V_OUT shifts outside this window - e.g., to <0.3 V (short-to-GND) or >4.7 V (open-circuit) - enabling immediate host-system fault flagging without additional circuitry.

KP235XTMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-SMD Module

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: Board Mount

Pressure Type:: Absolute

Operating Pressure:: 5.8PSI ~ 16.68PSI (40kPa ~ 115kPa)

Output Type:: Analog Voltage

Output:: 0.5 V ~ 4.5 V

Accuracy:: ±0.348PSI (±2.4kPa)

Voltage - Supply:: 4.5V ~ 5.5V

Port Size:: -

Port Style:: No Port

Features:: Amplified Output, Temperature Compensated

Termination Style:: SMD (SMT) Tab

Maximum Pressure:: 21.76PSI (150kPa)

Operating Temperature:: -40°C ~ 125°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: -

KP235XTMA1 FAQ

1.How can I place an order for KP235XTMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for KP235XTMA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for KP235XTMA1 reliable?

The price and inventory of KP235XTMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KP235XTMA1 is usually 5 days.

3.What payment methods are accepted for KP235XTMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KP235XTMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KP235XTMA1?

KP235XTMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KP235XTMA1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for KP235XTMA1?

For technical support, including KP235XTMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KP235XTMA1 requirements.

6.How does Aetrix verify that KP235XTMA1 is sourced from the original manufacturer or authorized distributors?

All KP235XTMA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that KP235XTMA1 meets industry standards.

7.What is the process for return or replacement of KP235XTMA1?

All KP235XTMA1 units undergo pre-shipment inspection (PSI). If there is an issue with KP235XTMA1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The KP235XTMA1 part is unused and in its original packaging.

Return procedure for KP235XTMA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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