Infineon Technologies KP212K1409XTMA1

Overview

KP212K1409 from Infineon Technologies is an analog absolute pressure sensor IC based on capacitive surface micromachining with monolithic BiCMOS signal conditioning. It delivers ratiometric 0.5–4.5 V output across 15–115 kPa pressure range, ±1.0 kPa accuracy, and operates from −40 °C to +125 °C in automotive manifold air pressure measurement.

For engineers reviewing the KP212K1409 datasheet, KP212K1409 pinout, KP212K1409 application, or KP212K1409 equivalent, key selection criteria include calibrated ratiometric transfer function, integrated EEPROM-based calibration storage, broken wire detection via clamping thresholds, and PG-DSOF-8-16 SMD package compatibility with automotive ECU PCB layouts.

Technical Context

The KP212K1409 implements a third-order polynomial digital linearization algorithm using stored EEPROM coefficients (90+22-bit), enabling precise pressure-to-voltage conversion independent of supply variation. Its analog output is ratiometric to VDD, with internal clamping at over/under-voltage thresholds to support open bond detection (OBD) without external circuitry.

Capacitive sensing cells are temperature-compensated in real time using on-chip thermal sensors and digitally adjusted gain/offset parameters. The device integrates a 12-bit ADC, 1-bit DAC, clock generator, and test interface-though TEST, CLOCK/VPROG, DATA IN, and DATA OUT pins are reserved for factory calibration and must remain floating in end applications.

Key Specifications

Pinout & Package

Package: PG-DSOF-8-16 - 8-pin surface-mount, dual-row, exposed pad variant optimized for thermal stability and automotive vibration resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BMP388 and MPX5700, the KP212K1409 uniquely combines automotive-grade analog ratiometric output, factory-calibrated EEPROM coefficients, and hardware-level OBD-ready clamping-enabling drop-in replacement in safety-critical analog ECU designs without firmware changes.

Availability

KP212K1409 is available at Aetrix Electronics and suitable for two-wheeler engine control, industrial vacuum monitoring, and medical respiratory devices requiring stable component supply, AEC-Q100 compliance, and long-lifecycle availability.

Supply support for KP212K1409 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, sensor, and automotive ICs, with global manufacturing and automotive qualification infrastructure.

The KP212K1409 belongs to Infineon's XENSIV™ pressure sensor family, designed specifically for high-accuracy, safety-compliant analog pressure measurement in harsh automotive and industrial environments.

FAQ

What is the recommended PCB layout for KP212K1409 to ensure optimal thermal and EMC performance?

Use separate analog and digital ground planes joined at a single point near the sensor's dual GND pins (pins 6 and 8). Place a 100 nF ceramic decoupling capacitor between VDD and GND within 2 mm of pin 5. Avoid routing high-speed signals under the sensor body and maintain ≥1 mm clearance from board edges to minimize stress-induced drift.

Does KP212K1409 require external calibration after soldering?

No. The KP212K1409 is fully calibrated at wafer and package level; all coefficients-including offset, gain, temperature coefficients, and third-order linearization parameters-are stored in on-chip EEPROM and applied automatically. No post-solder calibration is needed or supported.

How does broken wire detection work without external components?

Internal JFET-based clamping circuitry pulls VOUT to VDD if GND is disconnected or to GND if VDD fails. These hard-clamped states (≥4.8 V or ≤0.2 V) are detectable by the host MCU's ADC, enabling immediate OBD flagging without additional comparators or resistors.

Can KP212K1409 be used outside its specified 15–115 kPa range?

Operation below 15 kPa or above 115 kPa is not characterized or guaranteed. Output may saturate or deviate nonlinearly; clamping thresholds remain active, but accuracy and reliability are not assured beyond the calibrated range per datasheet Section 2.3.