ALLEGRO MICROSYSTEMS ACS709LLFTR-20BB-T Current Sensor, High Bandwidth, Unidirectional, Bidirectional, ± 2%, QSOP, 24 Pins

ACS709LLFTR-20BB-T is an Allegro� high-bandwidth, fast fault response current sensor IC in thermally enhanced package. It provides economical and precise means for current sensing applications in industrial, automotive, commercial, communications system. It is offered in a small footprint surface mount package that allows easy implementation in customer applications. It consists of precision linear hall sensor integrated circuit with copper conduction path located near the surface of the silicon die. Applied current flows through the copper conduction path, the analog output voltage from the Hall sensor IC linearly tracks the magnetic field generated by the applied current. The accuracy of maximized with this patented packaging configuration because the hall element is situated in extremely close proximity to the current to be measured. Application includes motor control and protection, load management and overcurrent detection, power conversion and battery monitoring / UPS systems.

• Current sensing range is ±20A
• Bandwidth is 120KHz typ (-3dB, TA = 25°C), supply voltage range from 3 to 5.5V (TA = -40 to 150°C)
• Primary conductor resistance is 1.10mohm typ (TA = 25°C, VCC= 5V)
• Linear sensing range is 37.5A max (TA = -40 to 150°C, VCC = 5V)
• High isolation voltage, suitable for line-powered applications
• 1.1mohm primary conductor resistance for low power loss
• User-settable overcurrent fault level, filter pin capacitor sets analog signal bandwidth
• Overcurrent fault signal typically responds to an overcurrent condition in < 2?s
• Factory-trimmed sensitivity, quiescent output voltage, and associated temperature coefficients
• 24 pin QSOP package, operating ambient temperature range from -40 to 150°C