Infineon Technologies KP120T

Overview

KP120T from Infineon Technologies is a surface-mount capacitive silicon absolute pressure sensor IC with monolithic BiCMOS signal conditioning, ratiometric analog output (0.25–4.85 V), 40–115 kPa full-scale range, ±1.2 kPa overall accuracy over –40 to +125 °C, and P-DSOF-8-5 package-used in automotive manifold air pressure (MAP) sensing and barometric pressure (BAP) measurement for engine air-fuel ratio control.

For engineers reviewing the KP120T datasheet, KP120T pinout, KP120T application, or KP120T equivalent, key selection criteria include its calibrated linear transfer function (V_OUT = V_DD × (0.01067 × p − 0.32667)), CMOS-compatible micromachined sensing element, SPI interface capability, and 2 kV HBM ESD rating-critical for under-hood automotive environments.

Technical Context

The KP120T integrates a surface-micromachined capacitive pressure transducer with a sigma-delta A/D converter, digital filter, and SPI interface on a single die using 0.8 µm BiCMOS technology. Its ratiometric output scales directly with V_DD, ensuring stability against supply variation.

It operates across 4.75–5.25 V supply, draws 2–9 mA, delivers ±0.25 mA output drive, and maintains ±1.2 kPa accuracy over its rated pressure span (75 kPa) and extended temperature range (–40 to +125 °C), with burst pressure tolerance up to 400 kPa.

Key Specifications

Pinout & Package

Packaged in P-DSOF-8-5: 8-pin surface-mount SOIC variant with exposed thermal pad, optimized for reflow soldering and board-level stress relief in automotive modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPX5700AP and SSCDANT030PDAA3, the KP120T offers tighter absolute accuracy (±1.2 kPa vs. ±1.05 kPa FS), native 5 V compatibility, and plug-and-play analog output-reducing validation time in existing MAP/BAP architectures without redesigning signal chain hardware.

Availability

KP120T is available at Aetrix Electronics and suitable for automotive engine control units, barometric compensation modules, and two-stroke powertrain monitoring systems requiring stable component supply with full traceability and long lifecycle support.

Supply support for KP120T 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, automotive ICs, and sensor solutions, with global R&D and manufacturing infrastructure.

The KP120T belongs to Infineon's KP-series absolute pressure sensor family, designed specifically for high-volume automotive applications demanding precision, reliability, and cost-effective SMT integration in harsh environments.

FAQ

What is the recommended PCB layout practice for KP120T to ensure pressure port integrity?

Mount the KP120T with its pressure port facing an unobstructed cavity or gasket-sealed vent channel to ambient or manifold pressure. Avoid solder mask over the port, minimize thermal vias near the die, and use stiffening ribs in the PCB cutout to prevent membrane deformation under mechanical stress during assembly.

Does KP120T require external calibration after soldering?

No. The KP120T is fully calibrated at wafer and package level before shipment. Its transfer function remains stable post-reflow; no end-of-line calibration is needed unless the application demands sub-kPa accuracy under extreme thermal cycling beyond –40 to +125 °C.

Can KP120T operate with a 3.3 V supply?

No. The KP120T is specified only for 4.75–5.25 V operation. At 3.3 V, the internal BiCMOS circuitry fails to bias correctly, resulting in invalid output or no response. A dedicated 5 V LDO regulator is required in 3.3 V system designs.

How does the KP120T handle condensation or oil exposure in under-hood environments?

The KP120T's silicon capacitive sensing element is hermetically sealed within the P-DSOF-8-5 package. It tolerates non-corrosive condensate and hydrocarbon vapors but must be protected from direct liquid ingress or oil immersion via proper gasketing and orientation-exposure to contaminants may cause long-term drift or port clogging.