Infineon Technologies KP124

Overview

KP124 from Infineon Technologies is a monolithic absolute pressure sensor IC based on capacitive surface micromachining, featuring ratiometric analog output (0.2 V to 4.7 V), calibrated transfer function over 15–115 kPa, ±1.5% FS accuracy, and integrated On-Board Diagnostics for broken-wire detection - deployed in barometric air pressure (BAP) measurement for automotive engine control and climate systems.

For engineers reviewing the KP124 datasheet, KP124 pinout, KP124 application, or KP124 equivalent, key selection criteria include its ratiometric voltage output scaling with VDD, EEPROM-stored calibration coefficients, BiCMOS signal conditioning, OBD fault detection logic, and PG-DSOF-8-12 SMD package compatibility with automated assembly.

Technical Context

The KP124 integrates a capacitive pressure-sensing cell array with a 10-bit ADC, 12-bit DAC, digital linearization using third-order polynomial calculation, and temperature compensation derived from on-chip thermal sensing. Calibration parameters - including offset, gain, and their temperature coefficients - are factory-programmed into 90+22-bit EEPROM.

Its functional block includes a clock generator (30 kHz internal, extendable via external CLOCK/VPROG), serial test interface (DATA IN/OUT), and OBD circuitry that pulls VOUT toward VDD or GND under open-ground or open-power faults - enabling microcontroller-level fault flagging without additional components.

Key Specifications

Pinout & Package

Package: PG-DSOF-8-12 - green-compliant, 8-pin surface-mount SOIC variant with integrated cap, optimized for low-cost automated placement and hermetic pressure port sealing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BMP280 and MPX5700, the KP124 uniquely combines ratiometric analog output, factory-calibrated EEPROM, and hardware-level OBD - reducing BOM count and firmware complexity in automotive BAP applications where wire integrity and supply tolerance are critical.

Availability

KP124 is available at Aetrix Electronics and suitable for automotive engine control units, climate control modules, and industrial altitude monitoring systems requiring stable component supply, long-lifecycle support, and AEC-Q200-aligned reliability.

Supply support for KP124 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 electronics, and sensor solutions, with global R&D and manufacturing infrastructure.

The KP124 belongs to Infineon's XENSIV™ pressure sensor family - designed specifically for high-accuracy, cost-sensitive automotive and industrial absolute pressure measurement with integrated signal conditioning and diagnostics.

FAQ

Is the KP124 pin-compatible with other Infineon pressure sensors like KP123 or KP125?

No. The KP124 uses a unique 8-pin PG-DSOF-8-12 package with dedicated TEST, CLOCK/VPROG, DATA IN, and DATA OUT pins not present in KP123 (5-pin) or KP125 (different pinout and calibration). Pin mapping and interface functionality differ significantly - direct substitution requires PCB redesign and firmware adaptation.

Does the KP124 require external components for basic analog operation?

No. With properly decoupled 4.5–5.5 V supply and dual GND connections, the KP124 delivers calibrated analog output on VOUT without external resistors, capacitors, or op-amps. Only optional external filtering (e.g., 10 nF ceramic capacitor near VOUT) is recommended for high-noise environments.

What is the role of the TEST, CLOCK/VPROG, DATA IN, and DATA OUT pins in normal use?

These pins are exclusively for factory calibration and post-production testing. In end applications, they must remain unconnected (floating) - applying signals or loading them risks disrupting internal biasing, degrading accuracy, or triggering unintended test modes that disable analog output.

How does the On-Board Diagnostics (OBD) function detect wiring faults?

OBD uses internal JFETs that become conductive when VDD or GND is disconnected. An open GND pulls VOUT to VDD (~5 V); an open VDD pulls VOUT to GND (~0 V). Host MCU monitors VOUT voltage boundaries - values outside 0.2–4.7 V indicate wiring faults, enabling immediate error logging without additional hardware.