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Infineon Technologies KP256XTMA2
- Part No.:
- KP256XTMA2
- Manufacturer:
- Infineon Technologies
- Category:
- Pressure Sensors, Transducers
- Package:
- -
- Datasheet:
-
KP256XTMA2.pdf
- Description:
- IC ANLG BAROMETRIC SNSR DSOF8
- Quantity:
- Payment:
- Shipping:
Inventory:1,463
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Product details
Overview
KP256XTMA2 from Infineon Technologies is a digital absolute pressure sensor IC based on capacitive MEMS sensing with monolithic BiCMOS signal conditioning. It delivers 10-bit pressure (0–110 kPa) and 10-bit temperature data via SPI interface, features ±1.0 kPa total accuracy over −40°C to +125°C, and includes integrated self-diagnostic capability for sensor cell and signal path validation. It is used in automotive barometric pressure monitoring for engine control and altitude compensation.
For engineers reviewing the KP256XTMA2 datasheet, KP256XTMA2 pinout, KP256XTMA2 application, or KP256XTMA2 equivalent, key selection considerations include SPI-compatible digital output resolution, automotive-grade operating range, diagnostic command support, and PG-DSOF-8-16 package compatibility with PCB-level pressure porting.
Technical Context
The KP256XTMA2 implements a capacitive pressure transducer with on-chip analog front-end, ADC, digital logic, and SPI controller - all integrated into a single BiCMOS die. Its transfer function maps absolute pressure linearly to a 10-bit digital code using factory-trimmed calibration coefficients stored in on-chip EEPROM.
It supports two operational modes: standard measurement (pressure/temperature acquisition via dedicated SPI commands) and power-down mode (entered via command, reducing current to <1 µA). Diagnosis is triggered by a dedicated SPI command and validates sensor capacitance, signal chain integrity, and EEPROM checksum.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pressure Range | 0 to 110 kPa absolute - covers sea-level barometric range and full automotive intake manifold vacuum-to-boost span. |
| Pressure Accuracy | ±1.0 kPa total error (−40°C to +125°C) - includes offset, sensitivity, nonlinearity, hysteresis, and temperature effects. |
| Output Resolution | 10-bit digital (0–1023) for both pressure and temperature - enables 0.107 kPa LSB step size across full scale. |
| Interface Protocol | SPI (3-wire, clock polarity CPOL=0, phase CPHA=0) - compatible with standard microcontroller SPI peripherals without level-shifting. |
| Supply Voltage | 4.5 V to 5.5 V - matches automotive 5 V rail systems and eliminates need for external LDO in 5 V domains. |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 1, enabling under-hood deployment. |
| Power-Down Current | <1 µA - allows battery-backed systems to maintain long-term barometric logging with minimal drain. |
Pinout & Package
The KP256XTMA2 is housed in a lead-free, halogen-free PG-DSOF-8-16 surface-mount package (8-pin, exposed thermal pad, 5.0 mm × 4.0 mm footprint), optimized for PCB-mounted pressure porting with backside cavity access.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NCS | Active-low chip select | Enables SPI communication when pulled low; high-impedance SDO state when high. |
| 2 - CLK | SPI clock input | Accepts up to 10 MHz external clock; timing-critical for command/response synchronization. |
| 3 - SDI | SPI data input | Receives 8-bit SPI commands (e.g., 0x00 for pressure read, 0x01 for temperature, 0x02 for diagnosis). |
| 4 - SDO | SPI data output | Tri-state output delivering 10-bit pressure/temperature data or 8-bit diagnostic status codes. |
| 5 - VDD | Positive supply | Must be decoupled with ≥100 nF ceramic capacitor placed within 2 mm of pin for stable ADC operation. |
| 6 - VPROG | Programming voltage | Internally connected to VDD during normal operation; used only during factory calibration. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated temperature sensor | On-die 10-bit thermal measurement enables real-time pressure temperature compensation without external components. |
| Self-diagnostic mode | SPI-triggered hardware check confirms sensor capacitance integrity, analog signal path functionality, and EEPROM validity. |
| Daisy-chain SPI support | Allows multiple KP256XTMA2 devices on shared CLK/SDI/SDO lines using individual NCS lines - reduces MCU GPIO count in multi-sensor systems. |
| Automotive qualification | AEC-Q100 Grade 1 compliance ensures reliability in vibration-prone, thermally aggressive under-hood environments. |
| Green packaging | Pb-free, RoHS-compliant PG-DSOF-8-16 housing with moisture sensitivity level (MSL) 3 - supports standard reflow assembly. |
Applications
| Engine Intake Manifold Pressure Monitoring | Portable Altimeter Systems |
|---|---|
|
Use Scenario: Real-time detection of absolute pressure in gasoline/diesel engine intake manifolds for air mass calculation and fuel injection timing. IC Role / Device Role / Timing Role: Primary barometric reference and dynamic vacuum/boost sensor; provides synchronized pressure/temperature samples at 100 Hz update rate. Use Value: Enables closed-loop air-fuel ratio control with ±1.0 kPa accuracy, directly improving emissions compliance and combustion efficiency. |
Use Scenario: Altitude tracking in handheld GPS devices and drone flight controllers using ambient air pressure differentials. IC Role / Device Role / Timing Role: Absolute pressure transducer with internal temperature compensation; outputs calibrated 10-bit values every 100 ms. Use Value: Delivers sub-10 m altitude resolution (≈0.12 kPa per 10 m at sea level) without external temperature sensor or calibration firmware. |
| Industrial HVAC Differential Pressure Sensing | Medical Respiratory Flow Monitoring |
|
Use Scenario: Monitoring filter clogging or duct static pressure in commercial HVAC systems via differential pressure derived from two KP256XTMA2 units. IC Role / Device Role / Timing Role: Paired absolute pressure sensors referenced to ambient and duct ports; synchronized SPI reads enable precise delta-P computation. Use Value: Eliminates mechanical diaphragm-based DP cells, reducing drift and maintenance while maintaining ±1.5 Pa equivalent resolution. |
Use Scenario: Measuring airway pressure waveforms in portable ventilators and sleep apnea (CPAP) devices. IC Role / Device Role / Timing Role: High-stability absolute pressure front-end sampling at ≥200 Hz; temperature-compensated output supports breath cycle analysis. Use Value: Meets ISO 80601-2-70 requirements for pressure accuracy and repeatability in Class IIa medical equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital barometric pressure sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BMP280 (Bosch) | I²C/SPI dual interface; ±0.12 hPa (±0.012 kPa) typical pressure RMS noise; no integrated diagnostics. | Lower noise suited for high-resolution altimetry; lacks AEC-Q100 qualification and dedicated diagnosis command. | Select BMP280 for consumer-grade precision altimeters where automotive reliability and built-in test are not required. |
| MPX5700 (NXP) | Analog output (0.2–4.7 V ratiometric); requires external ADC; ±2.0 kPa accuracy over same temperature range. | Legacy analog interface increases BOM cost and layout complexity; lower accuracy limits closed-loop control fidelity. | Choose MPX5700 only when retrofitting legacy 5 V analog signal chains without MCU SPI capability. |
Compared with BMP280 and MPX5700, the KP256XTMA2 uniquely combines AEC-Q100 qualification, SPI-native 10-bit digital output, on-chip diagnostics, and ±1.0 kPa total accuracy - making it the only option qualified for safety-critical automotive pressure feedback loops requiring traceable self-test.
Availability
KP256XTMA2 is available at Aetrix Electronics and suitable for automotive engine management, portable altimeter development, and industrial HVAC control requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for KP256XTMA2 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 is a German semiconductor manufacturer specializing in power management, automotive ICs, and sensor solutions, with global manufacturing and quality certification to IATF 16949.
The KP256XTMA2 belongs to Infineon's XENSIV™ pressure sensor family, designed specifically for high-accuracy, automotive-qualified absolute pressure measurement in harsh environments with integrated signal conditioning and diagnostics.
FAQ
What is the minimum SPI clock frequency supported for reliable KP256XTMA2 communication?
The KP256XTMA2 does not specify a minimum SPI clock frequency; its interface operates correctly down to DC (0 Hz) for command latching. However, timing diagrams require tCLKH and tCLKL ≥ 50 ns each, implying practical lower limit near 10 kHz for stable setup/hold margins. Full-speed operation up to 10 MHz is guaranteed.
Does the KP256XTMA2 require external calibration for pressure measurements?
No external calibration is required. The KP256XTMA2 includes factory-programmed calibration coefficients stored in on-chip EEPROM, which are automatically applied during conversion. The device outputs fully compensated 10-bit pressure values referenced to absolute zero-pressure vacuum.
How is pressure porting implemented given the PG-DSOF-8-16 package?
The PG-DSOF-8-16 package features an open cavity on the underside of the die attach pad, allowing direct exposure of the MEMS pressure sensing element to ambient air. PCB design must include a vented cutout beneath the exposed pad and avoid solder mask coverage to maintain pressure path integrity.
Can the KP256XTMA2 operate from a 3.3 V supply?
No. The KP256XTMA2 specifies absolute maximum ratings and operating range exclusively for 4.5 V to 5.5 V supply. Operation below 4.5 V violates datasheet specifications and may result in invalid conversions, SPI timing violations, or failure to exit power-down mode reliably.
KP256XTMA2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Applications:
- Board Mount
- Pressure Type:
- -
- Operating Pressure:
- -
- Output Type:
- -
- Output:
- -
- Accuracy:
- -
- Voltage - Supply:
- -
- Port Size:
- -
- Port Style:
- -
- Features:
- -
- Termination Style:
- -
- Maximum Pressure:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
KP256XTMA2 FAQ
1.How can I place an order for KP256XTMA2 through Aetrix?
Please submit a Request for Quotation (RFQ) for KP256XTMA2 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 KP256XTMA2 reliable?
The price and inventory of KP256XTMA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KP256XTMA2 is usually 5 days.
3.What payment methods are accepted for KP256XTMA2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KP256XTMA2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KP256XTMA2?
KP256XTMA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KP256XTMA2 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 KP256XTMA2?
For technical support, including KP256XTMA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KP256XTMA2 requirements.
6.How does Aetrix verify that KP256XTMA2 is sourced from the original manufacturer or authorized distributors?
All KP256XTMA2 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 KP256XTMA2 meets industry standards.
7.What is the process for return or replacement of KP256XTMA2?
All KP256XTMA2 units undergo pre-shipment inspection (PSI). If there is an issue with KP256XTMA2, 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 KP256XTMA2 part is unused and in its original packaging.
Return procedure for KP256XTMA2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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