TI Launches TMCS1100/1101 Current Sensors
Consistent and Accurate Measurements in
High-Voltage Systems Across Time and Temperature Changes


Texas Instruments (TI) announced on the 9th the launch of zero-drift Hall-effect current sensors 'TMCS1100' and 'TMCS1101'.

The two new sensors deliver minimal drift, maximum accuracy, and 3-kVrms isolation even over time and temperature variations. In particular, the 3-kVrms isolation functionality is useful in AC and DC high-voltage systems such as industrial motor drives, solar inverters, energy storage equipment, and power supplies.

Based on zero-drift architecture and real-time sensitivity calibration functionality, the TMCS1100 and TMCS1101 deliver high performance even under operating conditions such as temperature variations and equipment aging.

TI stated, "The two new sensors provide at least 200% lower total sensitivity drift than other magnetic current sensors at a maximum of 0.45% over temperature, and maximum full-scale offset drift of less than 0.1%," and added, "With 0.5% lifetime sensitivity drift, which is at least 100% lower than competing magnetic current sensors, the sensors reduce the possibility of performance degradation due to system aging."

The TMCS1100 (maximum 1%) and TMCS1101 (maximum 1.5%) offer high accuracy requiring no calibration, which reduces the frequency of equipment maintenance over time. They provide typical linearity of 0.05% to minimize signal distortion and maintain accuracy across temperature ranges of -40 to 125°C.

The TMCS1100 and TMCS1101 comply with UL (Underwriters Laboratories) 1577 standards related to demanding environmental conditions of grid-connected or power systems and provide galvanic isolation capable of 3-kVrms 60-second isolation.

Both devices are offered in 8-pin SOIC packages, support ±600V lifetime operating voltage up to 40% higher than competing devices, and have undergone rigorous testing procedures in accordance with UL and VDE (Verband der Elektrotechnik Elektronik Informationstechnik) requirements.

The TMCS1100 requires an external voltage reference for differential measurements. The TMCS1101 features an integrated voltage reference, enabling industry-standard pin-to-pin compatibility while delivering high performance, thereby simplifying design while reducing total cost.

The TMCS1100 and TMCS1101 are available through TI and authorized distributors. Pricing starts at $1.5 per unit in quantities of 1,000, and full or custom quantity reel orders are also available through TI.com and other distribution channels.

The TMCS1100EVM and TMCS1101EVM evaluation modules are available for purchase at $59 each on TI.com, with various payment methods and shipping options to choose from.