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CT220 Datasheet(PDF) 1 Page - Allegro MicroSystems |
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CT220 Datasheet(HTML) 1 Page - Allegro MicroSystems |
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1 / 25 page  The CT220 is a high-linearity and high-resolution contactless current sensor from Allegro developed on its patented XtremeSense™ TMR technology. The CT220 measures the magnetic field of the current flowing through a busbar or printed circuit board (PCB) trace and converts it to an analog output voltage that represents the field and therefore current. As a contactless current sensor, it has an inherently high isolation, making it an ideal solution for applications where product safety compliance is a requirement due to high operating voltages combined with human interaction with the product. The CT220 achieves XtremeSense performance with a typical total output error of ±0.5% while sensing field (current) as low as 5 mA. The device supports a wide operating voltage range of 2.7 to 5.5 V. The CT220 is an ideal contactless current sensing solution for applications that must have excellent isolation and accurate current measurements. There are four variants of the CT220 that will sense the following magnetic fields: ±1.5 mT, ±5.0 mT, ±10.0 mT, and ±15.0 mT. The device also integrates a FLAG output that is active low and indicates when the field is above 90% and below 10% the full field range. The CT220 is available in an industry standard 5-lead SOT23 package. CT220-DS, Rev. 1 MCO-0001516 • AC or DC contactless current sensing • Inherently high isolation • Magnetic field (current) range: □ ±1.5 mT □ ±5.0 mT □ ±10.0 mT □ ±15.0 mT • Stable performance over temperature • Supply current: ~1.2 mA • FLAG Pin to indicate 90% and 10% of full field range □ Active low digital output (push-pull) • Supply voltage: 2.7 to 5.5 V • Operating temperature ranges: □ Industrial: –40°C to 85°C □ Extended industrial: –40°C to 125°C • Package: 5-lead SOT23 XtremeSense™ High-Linearity, High-Resolution TMR Current Sensor with FLAG Output in Miniature Form Factor PACKAGE: Not to scale CT220 FEATURES AND BENEFITS DESCRIPTION December 15, 2023 • Contactless current sensing measurements • Motor control • Solar inverters • Power distribution units (PDUS) • UPS, SMPS, and telecom power supplies • Smart appliances • IoT smart plugs/energy devices • Battery management systems • Battery chargers • PC and servers APPLICATIONS 5-lead SOT23-5 Figure 1: CT220 with Analog and FLAG Outputs in SOT23-5 Package Block Diagram XtremeSense TMR State Machine Analog Front-End Digital (Push-pull) Analog 2 1 3 4 ANA VDD VDD FLAG GND |
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