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Infineon Technologies KP126
- Part No.:
- KP126
- Manufacturer:
- Infineon Technologies
- Category:
- Pressure Sensors, Transducers
- Package:
- 8-SMD Module
- Datasheet:
-
KP126.pdf
- Description:
- SENSOR 16.68PSIA 4.5V DSOF8
- Quantity:
- Payment:
- Shipping:
Inventory:4,999
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Product details
Overview
KP126 from Infineon Technologies is an absolute pressure sensor IC based on capacitive MEMS sensing with monolithic BiCMOS signal conditioning. It delivers ratiometric analog output (0.5–4.5 V) over 40–115 kPa pressure range, ±1.0 kPa max error, and operates from −40 °C to +125 °C ambient. Designed for barometric air pressure (BAP) measurement in automotive and consumer systems, it integrates on-board diagnostics (OBD) for broken-wire detection and optional clamping.
For engineers reviewing the KP126 datasheet, KP126 pinout, KP126 application, or KP126 equivalent, this page provides verified technical context, calibrated transfer function details, OBD behavior under open-circuit conditions, clamping thresholds, and package-specific layout guidance for PG-DSOF-8-12 with cap.
Technical Context
The KP126 implements a 10-bit ADC followed by digital linearization using third-order polynomial calculation, with calibration coefficients stored in 90+22-bit EEPROM. Its analog output is ratiometric to VDD, enabling supply-voltage-independent scaling across 5.0 V ±10% operation.
On-board diagnostics monitor continuity via JFET-based pull-up/pull-down behavior: open GND pulls VOUT toward VDD; open VDD pulls VOUT toward GND. Clamping-when enabled-limits VOUT between programmable upper/lower thresholds, simplifying fault window validation in microcontroller firmware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pressure Range | 40–115 kPa absolute; calibrated for barometric air pressure (BAP) measurement in engine control and weather stations. |
| Output Voltage | 0.5–4.5 V ratiometric; scales linearly with VDD, eliminating need for external reference in supply-tolerant designs. |
| Accuracy | ±1.0 kPa maximum total error over −40 °C to +125 °C; includes nonlinearity, hysteresis, temperature drift, and calibration uncertainty. |
| Supply Voltage | 5.0 V ±10%; powers internal BiCMOS signal chain and EEPROM without external regulators. |
| Operating Temp | −40 °C to +125 °C ambient; full specification guaranteed, enabling under-hood automotive deployment. |
| OBD Function | Detects open-circuit faults on VDD or GND: VOUT saturates near rail voltages, allowing firmware-level wire-break diagnosis. |
| Clamping | Optional internal voltage limiting at programmable thresholds; reduces post-processing burden for fault classification. |
Pinout & Package
Package: PG-DSOF-8-12 with integrated cap - lead-free, RoHS-compliant 8-pin surface-mount housing optimized for low-cost, high-volume pressure sensing applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 TEST | Digital test interface | Used only during factory calibration; must be left floating in end application to avoid interference with analog output. |
| 2 CLOCK / VPROG | Serial programming clock / programming voltage input | Accepts external clock for EEPROM programming; also serves as VPROG during calibration-no connection required in normal operation. |
| 3 DATA IN | Serial data input | Configures EEPROM parameters (e.g., clamping thresholds); inactive after programming-leave floating in system use. |
| 4 DATA OUT | Serial data output | Reads back calibration data or status; not used during analog sensing mode-floating in functional operation. |
| 5 VDD | Positive supply terminal | 5.0 V ±10% supply input; powers entire IC including sensor cell, signal chain, and EEPROM. |
| 6 GND | Main ground reference | Primary 0 V reference for analog circuitry; must be connected with low-impedance path to minimize noise coupling into VOUT. |
| 7 VOUT | Analog pressure output | Ratiometric voltage proportional to applied absolute pressure; drives standard ADC inputs with ≤10 kΩ load. |
| 8 GND | Secondary ground terminal | Redundant ground pin; recommended to connect both GND pins to same PCB ground plane for improved thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ratiometric analog output | Eliminates need for precision voltage reference; output scaling tracks VDD variation, simplifying power architecture in 5 V systems. |
| On-board diagnostics (OBD) | Hardware-level open-wire detection via JFET saturation behavior-no firmware overhead required for basic continuity checks. |
| Programmable clamping | Configurable upper/lower output limits stored in EEPROM; enables deterministic fault boundaries for safety-critical validation logic. |
| Calibrated transfer function | Third-order polynomial linearization with factory-trimmed coefficients stored in 90+22-bit EEPROM-no host-side compensation needed. |
| Green SMD package | PG-DSOF-8-12 with cap meets RoHS and WEEE requirements; supports automated reflow assembly without special handling. |
Applications
| Engine Control Unit (ECU) | Weather Station Barometer |
|---|---|
|
Use Scenario: Measuring intake manifold absolute pressure (MAP) or ambient barometric pressure for air mass calculation in gasoline/diesel engines. IC Role / Device Role / Timing Role: Primary absolute pressure transducer feeding real-time analog signal to ECU's ADC for fuel injection and ignition timing correction. Use Value: ±1.0 kPa accuracy ensures <1% air mass error across −40 °C to +125 °C, directly improving combustion efficiency and emissions compliance. |
Use Scenario: High-stability atmospheric pressure monitoring in portable or fixed-location environmental sensors. IC Role / Device Role / Timing Role: Standalone BAP sensor interfacing to low-power MCU ADC; operates continuously with minimal self-heating drift. Use Value: Ratiometric output and −40 °C to +125 °C spec allow battery-powered deployments without temperature-compensation firmware overhead. |
| Automotive HVAC System | Altitude-Compensated Appliance |
|
Use Scenario: Cabin pressure feedback for automatic climate control systems adjusting blower speed and air mix based on altitude changes. IC Role / Device Role / Timing Role: Analog pressure input to HVAC controller MCU; sampled at ~10 Hz for slow ambient drift tracking. Use Value: Integrated OBD detects wiring faults before HVAC failure, supporting ISO 26262 ASIL-B diagnostic coverage without additional components. |
Use Scenario: Oven or coffee maker compensating cooking time/temperature based on local atmospheric pressure (e.g., high-altitude baking). IC Role / Device Role / Timing Role: Low-cost BAP sensor providing one-time or periodic calibration offset to embedded thermal control algorithm. Use Value: "Green" PG-DSOF-8-12 package enables cost-sensitive consumer appliance integration with no lead-free compliance trade-offs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar absolute pressure sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BMP280 (Bosch) | I²C/SPI digital output; 3.3 V only; ±0.12 hPa typical accuracy; no built-in OBD or clamping. | Requires host MCU for compensation and fault logic; better suited for IoT nodes than automotive harness environments. | Select if digital interface, lower power, or higher resolution is prioritized over analog simplicity and wiring-fault resilience. |
| MPX5700 (NXP) | Analog output; 0–700 kPa range; ±1.5% FS accuracy; no EEPROM or programmable clamping; −40 °C to +125 °C. | Lacks on-chip diagnostics and calibration storage-requires external compensation or lookup tables in firmware. | Choose when measuring higher-pressure ranges (e.g., turbo boost) and OBD/clamping are not required. |
Compared with BMP280 and MPX5700, the KP126 uniquely combines ratiometric analog output, factory-calibrated polynomial linearization, EEPROM-stored clamping, and hardware OBD-all in a single AEC-Q200-aligned package-making it optimal for cost-constrained, safety-aware automotive BAP applications where analog simplicity and wiring integrity are critical.
Availability
KP126 is available at Aetrix Electronics and suitable for engine control units, weather station barometers, automotive HVAC systems, and altitude-compensated appliances requiring stable component supply and long-term calibration retention.
Supply support for KP126 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 manufacturing and quality certification aligned to IATF 16949.
The KP126 belongs to Infineon's XENSIV™ pressure sensor family, engineered specifically for high-accuracy, cost-optimized absolute pressure measurement in harsh automotive and industrial environments.
FAQ
Is the KP126 pin-compatible with other Infineon pressure sensors like KP114 or KP124?
No. The KP126 uses an 8-pin PG-DSOF-8-12 package with dedicated TEST, CLOCK/VPROG, DATA IN, and DATA OUT pins for EEPROM programming-unlike the 4-pin KP114/KP124 analog-only variants. Pin count, function allocation, and footprint differ significantly; direct replacement requires PCB redesign and firmware updates for calibration access.
Does the KP126 require external components for basic operation?
No external components are required for analog output functionality. VDD and GND connections plus a clean 5.0 V supply suffice. Optional 100 nF decoupling capacitor near VDD is recommended per datasheet layout guidelines, but no resistors, op-amps, or references are needed for nominal operation.
How is the clamping feature configured, and can it be disabled?
Clamping thresholds are programmed once during manufacturing via the serial interface (CLOCK/VPROG, DATA IN/OUT) and stored in EEPROM. The feature is enabled or disabled by writing to a dedicated configuration bit. Once set, clamping remains active until reprogrammed-no runtime enable/disable control is available in normal operation.
What is the impact of supply voltage variation on KP126 output accuracy?
Because the KP126 output is ratiometric, its voltage scale changes proportionally with VDD-e.g., at VDD = 4.5 V, full-scale output is 0.45–4.05 V. This preserves pressure-to-voltage linearity but shifts absolute voltage levels. Accuracy remains ±1.0 kPa regardless of VDD within 4.5–5.5 V, as ratiometric error is explicitly characterized and bounded in the datasheet.
KP126 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-SMD Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- ±0.145PSI (±1kPa)
- Voltage - Supply:
- 4.5V ~ 5.5V
- Port Size:
- -
- Port Style:
- No Port
- Features:
- Amplified Output, Temperature Compensated
- Termination Style:
- SMD (SMT) Tab
- Maximum Pressure:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
KP126 FAQ
1.How can I place an order for KP126 through Aetrix?
Please submit a Request for Quotation (RFQ) for KP126 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 KP126 reliable?
The price and inventory of KP126 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KP126 is usually 5 days.
3.What payment methods are accepted for KP126?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KP126 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KP126?
KP126 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KP126 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 KP126?
For technical support, including KP126 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KP126 requirements.
6.How does Aetrix verify that KP126 is sourced from the original manufacturer or authorized distributors?
All KP126 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 KP126 meets industry standards.
7.What is the process for return or replacement of KP126?
All KP126 units undergo pre-shipment inspection (PSI). If there is an issue with KP126, 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 KP126 part is unused and in its original packaging.
Return procedure for KP126:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
KP126 Tags
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2511020213301
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