DESCRIPTION

· The TMCS1123 is a galvanically isolated Hall-effect current sensor with industry-leading isolation and accuracy. It provides an output voltage proportional to the input current with excellent linearity and low drift across all sensitivity options. Precision signal conditioning circuitry with built-in drift compensation ensures less than 1.4% maximum sensitivity error over temperature and lifetime without system-level calibration, or less than 0.9% with a one-time calibration at room temperature. AC or DC input current flows through an internal conductor, generating a magnetic field measured by integrated Hall-effect sensors. Coreless construction eliminates the need for magnetic concentrators, while differential Hall sensors reject interference from stray external magnetic fields. Low conductor resistance allows measurable current ranges up to ±96A, minimizing power loss and easing thermal dissipation requirements. Insulation withstands 5kV RMS with a minimum of 8mm creepage and clearance, ensuring reliable lifetime reinforced working voltage. Integrated shielding provides excellent common-mode rejection and transient immunity. Fixed sensitivity enables operation from a single 3V to 5.5V power supply, eliminating ratiometry errors and improving supply noise rejection.

FEATURES

· High continuous current capability: 80A RMS
· Robust reinforced isolation
· High accuracy: Sensitivity error ±0.1%, Sensitivity thermal drift ±20ppm/°C, Sensitivity lifetime drift ±0.2%, Offset error ±0.2mV, Offset thermal drift ±2μV/°C, Offset lifetime drift ±0.2mV, Non-linearity ±0.1%
· High immunity to external magnetic fields
· Precision zero-current reference output
· Fast response: Signal bandwidth 250kHz, Response time 1µs, Propagation delay 110ns, Overcurrent detection response 100ns
· Overcurrent detection MASK (TMCS1123D71)
· Operating supply range: 3V to 5.5V
· Bidirectional and unidirectional current sensing
· Multiple sensitivity options: 25mV/A to 150mV/A
· Safety-related certifications (planned): UL 1577 Component Recognition Program, IEC/CB 62368-1

APPLICATIONS

· Solar Energy
· Motor control
· EV charging
· Power supplies
· Industrial AC/DC