125ARMS 500kHz Hall-effect current sensor with OCP, reference and AFR

The TMCS1148 is a galvanically

isolated Hall-effect current sensor with industry leading isolation and accuracy. An output

voltage proportional to the input current is provided with excellent linearity and low drift

at all sensitivity options. Precision signal conditioning circuitry with built-in drift

compensation is capable of less than 1.5% maximum sensitivity error

over temperature and lifetime with no system level calibration, or less than 1% maximum sensitivity

error including both lifetime and temperature drift 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, on-chip, Hall-effect sensors.

Core-less construction eliminates the need for magnetic concentrators. Differential Hall

sensors reject interference from stray external magnetic fields. Low conductor resistance

increases measurable current ranges up to ±160A while minimizing power

loss and easing thermal dissipation requirements. Insulation capable of withstanding

5kVRMS, coupled with a minimum of 8.8mm creepage

and clearance, provides high levels of reliable lifetime reinforced working voltage. Integrated

shielding enables excellent common-mode rejection and transient immunity.

Fixed sensitivity allows the device to operate

from a single 3V to 5.5V power supply, eliminating ratiometry errors and improving supply

noise rejection.