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04-27-2015

Allegro MicroSystems, LLC Introduces New Customer Programmable Current Sensor IC in a Standard Inline Package

Allegro » A1369

Designed for Use in Customer Provided Steel / Ferromagnetic Core

Allegro MicroSystems introduces a new customer programmable, high accuracy linear Hall effect-based current sensor IC. Allegro’s A1369 is packaged in a thin 3-pin SIP package to allow for easy integration with a magnetic core to create a highly accurate current sensing module. The programmable nature of the A1369 enables it to account for manufacturing tolerances in the final current sensing module assembly. These modules can be used in a variety of applications including electric power distribution and solar and wind power applications.

Allegro - A1369

This temperature-stable device is available in a through-hole single in-line package (TO-92). The accuracy of the device is enhanced via programmability of both the sensitivity and the Quiescent Output Voltage (QVO, the output with no magnetic field present) on the output pin for end-of-line optimization without the added complexity and cost of a fully programmable device. The device features One-Time-Programming (OTP), using non-volatile memory, to store the desired sensitivity & QVO for a given application or circuit. Allegro programs the sensitivity, temperature coefficient and QVO temperature coefficient at Allegro’s end of line testing to simplify programming requirements for the customer.

Functional Block Drawing
Functional Block Drawing.

This ratiometric Hall effect sensor IC provides a voltage output that is proportional to the applied magnetic field. The quiescent voltage output is user adjustable around 50% of the supply voltage and the output sensitivity is programmable within a range of 8.5 mV/G to 12.5 mV/G for the A1369EUA-10-T and 22 mV/G to 26 mV/G for the A1369EUA-24-T. The features of this linear device makes it ideal for use in industrial applications requiring high accuracy and are guaranteed over a wide temperature range of –40 °C to +85 °C.

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