Description
The Allegro® A1386 programmable, linear, Hall effect sensor IC is designed for low power, high accuracy, and small package size applications. The accuracy of this device is enhanced via programmability on the output pin for end-of-line optimization without the added complexity and cost of a fully programmable device.
The A1386 has two operating modes, normal and low power. In normal operation mode the A1386 operates much like its predecessors, the A1381, A1382, A1383, and A1384, as a highly accurate, user-programmable linear sensor IC with a ratiometric output. In low power mode, the device actually disengages some internal components in order to reduce power consumption. Although the accuracy of the device is substantially reduced during low power operation, it remains effective as a detector of magnetic regions (such as north and south poles on a rotating ring magnet). This unique feature allows the device to be used in systems that are put to sleep, during which time there may be only 3 V available, or in applications that have start-up conditions where the available supply voltage may drop below 4.5 V for a period of time.

Features and Benefits
• Low power consumption using 3 V supply
• Factory programmed sensitivity temperature coefficient
   (0.13%/°C nominal)
• Programmability at end-of-line
• Ratiometric sensitivity, quiescent voltage output, and
   clamps for interfacing with application DAC
• Temperature-stable quiescent voltage output and sensitivity
• Precise recoverability after temperature cycling
• Output voltage clamps provide short circuit diagnostic capabilities
• Wide ambient temperature range: –40°C to 150°C
• Resistant to mechanical stress
• Miniature package options