±600V basic isolation, 20Arms 80kHz Hall-effect current sensor with external reference

The TMCS1100 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 < 1% full-scale error

across the device temperature range.

The input current flows through an internal 1.8mΩ

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 600V lifetime working voltage and 3kVRMS 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 four sensitivity options. Fixed sensitivity allows the TMCS1100 to operate from a single 3V to 5.5V power supply,

eliminates ratiometry errors, and improves supply noise rejection. The current

polarity is considered positive when flowing into the positive input pin. The VREF input pin provides

a variable zero-current output voltage, enabling bidirectional or unidirectional

current sensing.

The TMCS1100 draws a maximum

supply current of 6mA, and all sensitivity options are specified over the operating

temperature range of –40°C to +125°C.