STMicroelectronics STEVAL-IFS004V1

Overview

STEVAL-IFS004V1 from STMicroelectronics is an evaluation board for the TDE0160FP metal proximity detector IC, implementing eddy-current-based inductive sensing with dual complementary open-collector outputs, adjustable hysteresis, and electronic output disable. It operates from 4 V to 36 V, draws <1.2 mA, supports coil loss resistance from 5 kΩ to 50 kΩ, and features peak current limiting and internal Zener-regulated dipole supply operation.

For engineers reviewing the STEVAL-IFS004V1 datasheet, STEVAL-IFS004V1 pinout, STEVAL-IFS004V1 application, or STEVAL-IFS004V1 equivalent, this board enables rapid validation of inductive metal detection circuits in industrial position sensing, factory automation object presence verification, and non-contact switch replacement designs requiring robust HF coil interface and configurable output logic.

Technical Context

The board implements the TDE0160FP's oscillator-driven inductive sensing architecture, where a 68 µH external coil (Lo) forms the sensing element whose eddy-current-induced HF losses modulate the internal oscillator frequency (<1 MHz) and trigger output switching. The IC integrates dual open-collector NPN transistors rated for 20 mA collector current and <1.1 V saturation voltage.

Hysteresis is set externally via resistor Rh (8.2 kΩ), enabling threshold stability against noise; an electronic disable circuit allows synchronous deactivation of both outputs, while the internal Zener diode ensures stable "dipole" biasing across the full 4–36 V supply range without external regulation.

Key Specifications

Availability

STEVAL-IFS004V1 is available at Aetrix Electronics and suitable for industrial position sensing, factory automation object presence verification, and non-contact switch replacement requiring stable component supply and validated reference design support.

Supply support for STEVAL-IFS004V1 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, analog ICs, power management devices, and sensors for industrial, automotive, and consumer markets.

The STEVAL-IFS004V1 belongs to ST's Industrial Function Solutions evaluation platform series, developed specifically to accelerate prototyping of inductive sensing subsystems using dedicated signal-conditioning ICs like the TDE0160FP.

FAQ

What is the primary sensing principle implemented by STEVAL-IFS004V1?

This board uses eddy-current induction: the TDE0160FP drives an external 68 µH coil (Lo), and metallic objects near the coil alter its high-frequency losses, shifting oscillator behavior to trigger the dual open-collector outputs. No physical contact or magnet is required.

Can STEVAL-IFS004V1 detect non-ferrous metals?

Yes - the TDE0160FP-based design detects all conductive metals (e.g., aluminum, copper, stainless steel) via eddy-current generation, though sensitivity varies with conductivity, permeability, and target thickness. Ferrous metals yield stronger response due to higher magnetic permeability.

How is hysteresis adjusted on this board?

Hysteresis is set by the 8.2 kΩ SMD resistor (Rh) mounted at R_h location on the board. Replacing Rh with a different value changes the hysteresis window - higher resistance increases hysteresis, improving noise immunity at the cost of reduced detection resolution.

Does STEVAL-IFS004V1 require external power regulation?

No - the TDE0160FP incorporates an internal Zener diode that maintains stable "dipole" operation across the full 4–36 V input range, eliminating need for external regulators or voltage dividers when interfacing with standard industrial 24 V DC supplies.