Description:Integrated contact current sensing for low to medium current ranges:
0 to 20 A
+30 A
+50 A
+20 A
+40 A
0 to 65 A
0 to 30 A
0 to 50 A
±65 A
Integrated current carrying conductor (CCC)
Linear analog output voltage
Total error output ≤ ±1.0% FS, -40°C to 125°C
1 MHz bandwidth
Response time: ~300 ns
UL/IEC 62368-1 and UL1577 certification
Rated isolation voltage: 5 kVRMS
Working voltage for basic isolation: 1287 VRMS
Working voltage for reinforced isolation: 647 VRMS
IEC 61000-4-5 certified
A good PCB layout for the CT431-HSWF65MR should ensure that the Hall sensor is centered over the IC, with the Hall sensor's sensitive axis aligned with the direction of the magnetic field. Keep the PCB traces as short as possible, and use a ground plane to reduce noise and EMI.
The CT431-HSWF65MR's output signal can be noisy due to the Hall effect principle. To filter out noise, use a low-pass filter with a cutoff frequency around 1 kHz to 10 kHz, depending on the application's requirements. You can also use hysteresis or Schmitt trigger circuits to improve signal quality.
The CT431-HSWF65MR is rated for operation from -40°C to 150°C, but the device's accuracy and sensitivity may degrade at extreme temperatures. Ensure proper thermal management and consider derating the device's performance at high temperatures.
Calibration involves adjusting the device's sensitivity and offset to match the specific application's requirements. Use a calibration procedure that involves applying a known magnetic field and adjusting the device's output to match the expected response. Consult Allegro's application notes for more information.
The CT431-HSWF65MR has built-in ESD protection, but it's still important to follow proper handling and storage procedures to prevent damage. Use anti-static wrist straps, mats, and packaging materials, and avoid touching the device's pins or exposed internal components.
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CT431-HSWF65MR Overview
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