±420V basic isolation, 20Arms 80kHz Hall-effect current sensor with reference

The TMCS1107 is a galvanically

isolated Hall-effect current sensor capable of DC or AC current measurement with

high accuracy, excellent linearity, and temperature stability. A low-drift,

temperature-compensated signal chain provides <3% full-scale error across the

device temperature range.

The input current flows through an internal 1.8-mΩ

conductor that generates a magnetic field measured by an integrated Hall-effect

sensor. This structure eliminates external concentrators and simplifies design. Low

conductor resistance minimizes power loss and thermal dissipation. Inherent galvanic

insulation provides a 420-V lifetime working voltage and

3-kVRMS basic isolation between the current path and

circuitry. Integrated electrical shielding enables excellent common-mode rejection

and transient immunity.

The output voltage is proportional to the input

current with multiple sensitivity options. Fixed sensitivity allows the TMCS1107 to operate from a single 3-V to 5.5-V power supply, eliminates

ratiometry errors, and improves supply noise rejection. The current polarity is

considered positive when flowing into the positive input pin. Both

unidirectional and bidirectional sensing variants are available.

The TMCS1107 draws a maximum supply current of 6 mA, and all sensitivity options are specified over the operating temperature range of –40°C to +125°C.