Infineon Technologies KPY53-AK

Overview

KPY53-AK from Infineon Technologies is a silicon piezoresistive absolute pressure sensor with 0–1.6 bar full-scale range, integrated silicon temperature sensor (R25 ≈ 2 kΩ), and TO-8-5 metal can package. It delivers 5.6–8.8 mV/Vbar sensitivity, ±0.15% V_fin linearity (BFS), and operates from −40 °C to +125 °C - used in precision barometric sensing and HVAC static pressure monitoring.

For engineers reviewing the KPY53-AK datasheet, KPY53-AK pinout, KPY53-AK application, or KPY53-AK equivalent, key selection criteria include absolute pressure range (0–1.6 bar), bridge resistance (4–8 kΩ), temperature coefficient of output (−0.19 to −0.15 %/K), and TO-8-5 mechanical interface compatibility for hermetic mounting.

Technical Context

The KPY53-AK implements a monocrystalline silicon diaphragm with four piezoresistors in a Wheatstone bridge configuration, biased by a 5 V supply. Its output voltage (V_fin) scales linearly with applied absolute pressure and exhibits low hysteresis (±0.1% V_fin) and high long-term stability due to fatigue-free silicon structure.

Integrated dual-terminal silicon temperature sensor (R25 = 2 kΩ, TCR ≈ +0.095 %/K) enables on-board thermal compensation. The device requires external signal conditioning - no internal amplification or ADC - and is specified at 5 V excitation with output swing of 45–150 mV across its pressure range.

Key Specifications

Pinout & Package

TO-8-5 metal can package with glass-sealed feedthroughs and capillary tube port for absolute pressure reference. Hermetically sealed, weight ≈ 4.1 g, dimensions per GMX05635 outline (ø10.92 mm body, 17.3 mm height).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPX53GP and SSCDANT015PGAA3, the KPY53-AK offers higher full-scale range (1.6 bar vs. 1.5/1.03 bar), raw bridge output for maximum signal fidelity, and TO-8-5 hermeticity - making it optimal for high-reliability analog designs requiring thermal and mechanical robustness.

Availability

KPY53-AK is available at Aetrix Electronics and suitable for barometric weather stations, HVAC static pressure control, automotive cabin pressure sensing, and medical ventilator airway monitoring requiring stable component supply across extended product lifecycles.

Supply support for KPY53-AK 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 leadership in silicon-based pressure and motion sensing technologies.

The KPY series belongs to Infineon's legacy high-stability piezoresistive pressure sensor product line, designed specifically for industrial and automotive applications demanding long-term accuracy, hermetic reliability, and wide temperature operation.

FAQ

What excitation voltage is required for KPY53-AK operation?

The KPY53-AK is characterized at 5 V DC excitation, with absolute maximum supply voltage of 12 V. Operation at 5 V ensures compliance with specified sensitivity (5.6–8.8 mV/Vbar), linearity (±0.15%), and thermal coefficients. Lower excitation reduces output amplitude proportionally but maintains ratiometric behavior.

Is the KPY53-AK calibrated or compensated out-of-the-box?

No, the KPY53-AK is an unamplified, uncompensated bridge sensor. It provides raw differential analog output (V_OUT+ – V_OUT−) and requires external signal conditioning - including instrumentation amplification, offset nulling, and temperature compensation using its integrated 2 kΩ silicon temperature sensor.

Can KPY53-AK be used for gauge or differential pressure measurements?

No - the KPY53-AK is strictly an absolute pressure sensor with a sealed vacuum reference cavity behind its diaphragm. Its capillary tube (Pin 1) is for ambient pressure access only; it cannot be plumbed to a second pressure source. For gauge or differential use, dedicated MPX or XG series sensors are required.

What is the purpose of Pin 8 (NC) in the TO-8-5 package?

Pin 8 is internally not connected and serves no electrical function. It must remain unconnected in PCB layout and schematic design. This pin exists for mechanical symmetry and package standardization across the KPY family (e.g., KPY52–KPY56), not for signal routing or grounding.