Allegro MicroSystems CT450 XtremeSense® TMR Sensors

Allegro MicroSystems CT450 XtremeSense^® TMR Sensors are high bandwidth and low noise integrated contactless current sensors. The CT450 implements patented XtremeSense TMR technology to enable high-accuracy current measurements for many consumer, enterprise, and industrial applications.

The Allegro CT450 XtremeSense TMR Sensors support eight field ranges where the CT450 senses and translates the magnetic field into a linear analog output voltage. The CT450 device features a total error output of less than ±1.0% over voltage and temperature.

The CT450 has less than 1.0µs output response time while the current consumption is about 5.0mA. The Sensors are equipped with over-field detection (OFD) circuitry to identify out-of-range fields. Additionally, the CT450 has a fault-bar (FLT) pin should over-field faults occur, then an active LOW digital signal will be activated by the CT450 to alert the microcontroller that a fault condition has occurred.

The CT450 is offered in a very low profile, industry-standard 8-lead TSSOP package that is “green” and RoHS compliant.

Features

Integrated Contactless Current/Field Sensing Ranges:
- 0mT to +8mT
- -8mT to +8mT
- 0mT to +12mT
- -12mT to +12mT
- 0mT to +20mT
- -20mT to +20mT
Linear analog output voltage
Total error output < ±1.0%, -40°C to +125°C