Texas Instruments TMCS1126CEVM

Overview

TMCS1126CEVM from Texas Instruments is a high-voltage evaluation module designed to characterize the TMCS1126C-series isolated Hall-effect current-sense amplifiers with 0.1×VS reference point (0.33 V at 3.3 V supply), supporting all five fixed sensitivities (25–150 mV/A) across a single PCB. It enables safe, reinforced-isolation testing up to ±1100 V common-mode voltage and 90 A DC input current while providing test points, large copper planes for thermal management, and breakable sub-boards for individual sensitivity validation.

For engineers reviewing the TMCS1126CEVM datasheet, TMCS1126CEVM pinout, TMCS1126CEVM application, or TMCS1126CEVM equivalent, this EVM supports rapid functional verification of isolated current sensing in high-side/low-side configurations, overcurrent threshold customization via on-board jumper options, and output filtering evaluation - critical for industrial motor drives, energy storage systems, and EV charging infrastructure design.

Technical Context

The TMCS1126CEVM implements a modular, snap-apart PCB architecture with five detachable segments - each populated with one TMCS1126C variant (C1–C5) - enabling side-by-side comparison of 25 mV/A through 150 mV/A sensitivities under identical thermal and layout conditions. Each segment includes dedicated IN+/IN− lug connectors, VOUT/GND/VS test points, and configurable overcurrent (nOC) circuitry using either potentiometer-adjusted or resistor-divider-based VOC references.

Reinforced isolation compliance is maintained via physical separation between high-voltage (HV) and low-voltage (LV) domains: HV inputs route through fused lead-frame terminals rated for 90 A DC, while LV supply (3–5.5 V) powers the TMCS1126's secondary side. The board integrates 0.1 µF ceramic bypass capacitors per device and optional 10 pF/0 Ω output filter footprints, but omits EMI-optimized layout - confirming its role as a functional, not compliance-grade, evaluation tool.

Key Specifications

Availability

TMCS1126CEVM is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and EV charging infrastructure requiring stable component supply and rapid prototyping support for isolated current sensing.

Supply support for TMCS1126CEVM 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 headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in precision signal conditioning and power management ICs.

The TMCS1126CEVM belongs to TI's high-voltage evaluation module (HV EVM) family, engineered specifically to accelerate development of reinforced-isolation current sensing solutions for applications demanding safety-certified measurement integrity at up to ±1100 V.

FAQ

What is the primary function of the TMCS1126CEVM?

The TMCS1126CEVM is a dedicated evaluation module for the TMCS1126C-series isolated Hall-effect current-sense amplifiers. It provides a ready-to-use platform to validate device performance - including sensitivity accuracy, output linearity, overcurrent response, and isolation behavior - across all five C-variant options (C1–C5) under real-world high-voltage, high-current conditions. The TMCS1126CEVM itself is not a semiconductor component but a test fixture enabling rapid characterization of the underlying TMCS1126CEVM-compatible ICs.

Does the TMCS1126CEVM support all TMCS1126 sensitivity options?

Yes - the TMCS1126CEVM includes five physically separable sub-boards, each populated with one TMCS1126C device: C1 (25 mV/A), C2 (50 mV/A), C3 (75 mV/A), C4 (100 mV/A), and C5 (150 mV/A). This allows direct comparison of output swing, noise, and thermal behavior across the full sensitivity range without changing hardware or rework, all while maintaining the same 0.1×VS (0.33 V) reference point defined for the C-series.

Can the TMCS1126CEVM be used for electromagnetic compatibility (EMC) testing?

No - the TMCS1126CEVM is explicitly not laid out for EMC or EMI compliance testing. Its PCB design prioritizes functional evaluation and accessibility (e.g., large test points, breakable segments, thermal copper planes) rather than controlled impedance, shielding, or layout techniques required for radiated/conducted emissions certification. TI states in the user's guide that the TMCS1126CEVM "is not laid out for electromagnetic compatibility (EMC) testing" and should be used solely for lab-based functional validation.

What safety precautions apply when using the TMCS1126CEVM?

The TMCS1126CEVM is classified as a Texas Instruments High Voltage Evaluation Module (TI HV EVM), requiring strict adherence to HV safety protocols: de-energize before probing, use insulated tools, maintain observer presence during energized operation, install emergency power-off (EPO) protection for supplies >50 Vrms/75 VDC, and never touch HV terminals. Warning labels ("DANGER HIGH VOLTAGE", "CAUTION HOT SURFACE") are printed directly on the board, and TI mandates qualified professional users only - the TMCS1126CEVM must never be deployed in end-product systems.

How does the overcurrent (nOC) functionality work on the TMCS1126CEVM?

The TMCS1126CEVM implements configurable overcurrent detection via the TMCS1126's active-low nOC pin. Users select VOC reference mode using jumper J1_x: short pins 1–2 for potentiometer-adjustable VOC (0.3–0.85×VS), pins 2–3 for fixed 90% divider, or leave open for external VOC drive. Resistor R1_x pulls nOC high; when VOUT exceeds VOC, the internal comparator asserts nOC low - allowing immediate system-level fault signaling. This behavior is fully testable on the TMCS1126CEVM using the OC test point and onboard circuitry.