NXP Semiconductors KMZ10C,112

Overview

KMZ10C from Philips Semiconductors is a magnetoresistive magnetic field sensor based on thin-film permalloy, configured as a 4-terminal Wheatstone bridge. It delivers 1.5 mV/V sensitivity at 5 V supply, ±7.5 kA/m field range, and 1–1.8 kΩ bridge resistance, enabling precise analog field measurement in proximity detection and position sensing systems.

For engineers reviewing the KMZ10C datasheet, KMZ10C pinout, KMZ10C application, or KMZ10C equivalent, this page provides verified technical context, pin-level design meaning, real-world use scenarios, and validated alternative options for current/field measurement circuits requiring stable offset (±1.5 mV/V) and linearity ≤0.8% FS up to ±3.75 kA/m.

Technical Context

The KMZ10C operates as a passive, voltage-excited magnetoresistive bridge with no internal amplification or signal conditioning. Its output is differential (+VO/−VO) and ratiometric to VCC, requiring external instrumentation amplification and offset trimming.

Bridge temperature operation spans −40 °C to +150 °C, with thermal resistance of 180 K/W and sensitivity temperature coefficient of −0.5 %/K. An auxiliary field (Hx = 3 kA/m) is required for reset before first use when Hx < 3 kA/m, per SOAR compliance.

Key Specifications

Pinout & Package

Package: SOT195 - plastic single-ended flat package with 4 in-line leads, 14.5 mm body length, 5.2 mm width, and 0.8 mm max height.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar magnetic field transduction applications.

Compared with KMZ10C, SS495A simplifies signal chain integration but sacrifices field resolution and high-temperature bridge stability, while A1302 trades range and ruggedness for tighter low-field accuracy and smaller footprint-making KMZ10C optimal for demanding industrial field measurement where external signal conditioning is acceptable.

Availability

KMZ10C is available at Aetrix Electronics and suitable for current sensing, rotary position detection, and linear displacement measurement requiring stable component supply across automotive, industrial automation, and energy metering programs.

Supply support for KMZ10C 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

Philips Semiconductors (now NXP Semiconductors) is a global semiconductor innovator with leadership in analog, RF, and sensor technologies since the 1950s.

The KMZ10C belongs to Philips' discrete magnetic sensor family designed for high-reliability, contactless field measurement in harsh thermal and EMI environments-targeting automotive subsystems, industrial motion control, and power electronics monitoring.

FAQ

What is the operating temperature range of the KMZ10C?

The KMZ10C bridge operates from −40 °C to +150 °C, with storage temperature rated from −65 °C to +150 °C. Its thermal resistance is 180 K/W, and performance specifications-including sensitivity, offset, and linearity-are guaranteed at Tamb = 25 °C with VCC = 5 V and Hx = 3 kA/m. The KMZ10C maintains functional integrity across its full bridge temperature range, making it suitable for under-hood automotive and industrial motor control applications.

Does the KMZ10C require an external amplifier?

Yes, the KMZ10C requires an external instrumentation amplifier because it outputs a differential, unamplified Wheatstone bridge signal (±mV/V level). Its typical sensitivity is 1.5 mV/V at 5 V supply, yielding only ~7.5 mV full-scale output-insufficient for direct ADC interfacing without gain. The KMZ10C does not include any on-chip amplification, regulation, or signal conditioning, distinguishing it from integrated Hall-effect sensors like the SS495A or A1302.

What is the purpose of the auxiliary field (Hx) requirement in the KMZ10C?

The KMZ10C requires an auxiliary magnetic field of Hx = 3 kA/m for reset before initial operation when Hx < 3 kA/m, ensuring consistent magnetic domain alignment in the permalloy film. This reset step eliminates hysteresis-related uncertainty and guarantees repeatable zero-field offset and sensitivity. Failure to apply this reset may cause unpredictable output drift or non-monotonic behavior in the KMZ10C, especially in angular position applications where repeatability is critical.

Can the KMZ10C measure both DC and AC magnetic fields?

Yes, the KMZ10C measures both DC and AC magnetic fields across its full 0–1 MHz operating bandwidth. Its magnetoresistive bridge responds instantaneously to field changes with no inherent low-frequency roll-off, supporting true DC-coupled field measurement. At 1 MHz, the KMZ10C maintains full amplitude response, enabling use in high-speed current monitoring (e.g., switching power supply ripple analysis) and dynamic position tracking where timing fidelity matters.

How is linearity specified for the KMZ10C, and what does %·FS mean?

Linearity for the KMZ10C is specified as %·FS (percent of Full Scale), meaning deviation from ideal straight-line output relative to the full ±7.5 kA/m range. At ±3.75 kA/m, linearity is ≤0.8%·FS; at ±6.0 kA/m, it degrades to ≤2.4%·FS. This metric quantifies absolute error in field measurement-e.g., 0.8%·FS at ±3.75 kA/m equals ±0.03 kA/m error-enabling engineers to determine usable field range for target accuracy in their KMZ10C-based designs.