ALLEGRO CT427-HSN830MR

The CT427 is a high bandwidth and ultra-low noise integrated contact current sensor that uses Allegro patented XtremeSense™ TMR technology to enable high accuracy current measurements for many industrial, consumer, and automotive applications. The device supports eight current ranges where the integrated current carrying conductor (CCC) will handle up to 65 A of current and generates a current measurement as a linear analog output voltage. The device achieves a total output error of less than ±1.0% full-scale (FS). The device has a 300 ns output response time while the current consumption is ~6.0 mA and is immune to common mode fields. The CT427 has an integrated overcurrent detection (OCD) circuitry to identify out of range currents (OCD) with the result output to the fault-bar (FLT) pin. The FLT is an open drain, active low digital signal that is activated by the CT427 to alert the microcontroller that a fault condition has occurred. The CT427 is offered in an industry-standard 8-lead SOIC package that is green and RoHS compliant.

• Integrated contact current sensing for low to medium current ranges: 0 to 20 A, 0 to 50 A, ±20 A, ±50 A, 0 to 30 A, 0 to 65 A, ±30 A, ±65 A
• Integrated current carrying conductor (CCC)
• Linear analog output voltage
• Total error output ≤±1.0% FS
• 1 MHz bandwidth
• Response time: ~300 ns
• UL/IEC 62368-1 and UL1577 certification
• Rated isolation voltage: 3.5 kVRMS
• Working voltage for basic isolation: 560 VRMS
• Working voltage for reinforced isolation: 280 VRMS
• Low noise: 9.5 to 19.0 mARMS (ω fBW = 100 kHz)
• Supply voltage: 3.0 to 3.6 V
• Filter function to reduce noise on output pin
• Immunity to common mode fields: -54 dB
• Overcurrent detection
• Out of range currents
• AEC-Q100 grade 1
• 8-lead SOIC package

• Solar/power inverters
• Power utility meter
• UPS, SMPS, and telecom
• Overcurrent fault power supplies protection
• Motor control