Texas Instruments TMAG5124EVM

Overview

TMAG5124EVM from Texas Instruments is a 2-wire Hall-effect sensor evaluation module designed to characterize TMAG5124 family devices-including TMAG5124E1, F1, G1, and H1 variants-over variable wire separation distances using current-mode signaling. It supports VCC operation from 2.5 V to 38 V, features four SOT-23-mounted Z-axis north-pole-sensitive sensors with BOP thresholds of 4 mT, 6 mT, 10 mT, and 15 mT, and delivers active-low output currents of 5–6.9 mA (magnet present) versus 12–15 mA (no magnet), enabling precise magnetic trip-point validation in industrial current-loop systems.

For engineers reviewing the TMAG5124EVM datasheet, TMAG5124EVM pinout, TMAG5124EVM application, or TMAG5124EVM equivalent, this EVM provides hardware-level verification of 2-wire Hall sensor behavior under real-world voltage range, loop integrity, and magnetic sensitivity conditions-critical for automotive position sensing, industrial motor control feedback, and isolated current monitoring designs where signal integrity over distance matters.

Technical Context

The TMAG5124EVM integrates four discrete TMAG5124 SOT-23 coupon boards-U1–U4-each populated with a different sensitivity variant (E1/F1/G1/H1) and configured for Z-axis, active-low, 2-wire operation. Each sensor operates independently across 2.5 V–38 V, producing a current-sink output that transitions between low-current (5–6.9 mA) and high-current (12–15 mA) states based on magnetic flux crossing BOP/BRP thresholds.

A dedicated control board uses the INA303A1IPWR current shunt monitor (36-V common-mode, bidirectional, integrated window comparator) to measure loop current across a precision 3-Ω shunt (R1), driving three LEDs (ON/OFF/ALERT) to indicate device state, trip point correlation, and open-loop fault detection. J5 jumper enables single 5-V supply mode or full-range VCC testing when removed.

Key Specifications

Availability

TMAG5124EVM is available at Aetrix Electronics and suitable for industrial motor control feedback, automotive position sensing, isolated current monitoring, and prototyping of 2-wire Hall-effect sensor interfaces requiring stable component supply and validated reference hardware.

Supply support for TMAG5124EVM 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

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions for industrial, automotive, and personal electronics applications.

The TMAG5124EVM belongs to TI's Hall-effect sensor evaluation platform family, engineered specifically to accelerate development of current-output magnetic sensing systems where long-cable runs, EMI resilience, and deterministic trip-point validation are critical.

FAQ

What is the primary purpose of the TMAG5124EVM?

The TMAG5124EVM is a dedicated evaluation module for the TMAG5124 family of 2-wire Hall-effect sensors. Its core function is to enable engineers to validate magnetic operating points (BOP/BRP), current-mode output behavior, and loop integrity across variable wire lengths and supply voltages-from 2.5 V to 38 V-without custom PCB design. The TMAG5124EVM includes four pre-mounted sensitivity variants and LED-based state feedback to streamline sensor selection and system integration.

Which TMAG5124 variants are included on the TMAG5124EVM coupon boards?

The TMAG5124EVM includes four SOT-23-mounted TMAG5124 variants: U1 = TMAG5124E1CQDBZ (4 mT), U2 = TMAG5124F1CQDBZ (6 mT), U3 = TMAG5124G1CQDBZ (10 mT), and U4 = TMAG5124H1CQDBZ (15 mT). All are Z-axis, north-pole-sensitive, active-low devices with nominal low-state output current of 6 mA and high-state current of 12–15 mA. These match the TMAG5124E1/F1/G1/H1 part numbers listed in the official TMAG5124 datasheet (SLYS016).

Can the TMAG5124EVM be used to test the full 2.5 V–38 V VCC range of the TMAG5124 sensors?

Yes-but with an important limitation. While the TMAG5124 sensors themselves operate up to 38 V, the onboard INA303A1IPWR current monitor has a 36-V common-mode voltage limit. Therefore, the control board's LED feedback remains valid only up to 36 V. For full 38-V validation, users must perform standalone measurements using only the coupon board (U1–U4) with external instrumentation, as described in Section 4.4 of the TMAG5124EVM User's Guide (SLYU055A).

How does the TMAG5124EVM indicate magnetic trip and release points?

The TMAG5124EVM uses dual-color LED feedback: a blue "ON" LED (D1) illuminates when the magnetic flux exceeds the BOP threshold and the TMAG5124 output enters its low-current state (5–6.9 mA); the blue "OFF" LED (D2) illuminates when flux falls below the BRP threshold and the output returns to high-current state (12–15 mA). This real-time visual correlation allows immediate confirmation of magnetic switching behavior without oscilloscope or multimeter dependency.

What role does the J5 jumper play on the TMAG5124EVM?

J5 is a shorting plug that connects the 5-V input to the VCC rail. When installed, it configures the TMAG5124EVM for single-supply operation at 5 V-ideal for quick functional checks. When removed, it decouples the 5-V logic supply from the VCC test rail, allowing independent application of any DC voltage (2.5 V–38 V) to the TMAG5124 coupon boards while powering the control board separately-a necessary setup for evaluating the full operational voltage range and validating loop performance under real-world supply conditions.