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FEATURES AND BENEFITS

? Allegro KH package with integrated EMC components

reduces need for external EMI protection

? Digital output with speed and direction information

provides target/ring magnet position information

? Enhanced algorithms provide low jitter and high output

accuracy performance

? Center of package switching alignment

? Highly repeatable across operating temperature range

? EEPROM programming for performance optimization

and production traceability

? Electrical offset compensation through chopper

stabilization

? Zero-crossing switching with internal hysteresis

? Robust test coverage capability using Scan Path and

IDDQ measurement

DESCRIPTION

The A1696PKH is a combined Hall-effect sensor IC and

EMC protection circuit that provides a user-friendly PCB-less

solution for true zero-speed digital crankshaft sensing. The

A1696 provides speed and direction information through a

variable pulse-width output protocol. The open-drain output

provides a voltage output such that the time between falling

electrical edges (period) corresponds to the speed, and the time

between a falling edge and corresponding rising edge (pulse

width) indicates direction. The device can be optimized via

programmable options for crankshaft sensing applications and

can be used to sense either a ring magnet or a ferromagnetic

target (when back-biased with a proper magnet).

Three Hall plates are used to create three differential channels.

These channels, along with advanced direction detection

algorithms, are used to produce a highly accurate output

across the full range of air gap and operating temperatures.

The combination of high accuracy with direction information

provides absolute position on most crank targets in cases of

engine backlash, making it ideal for stop/start engine designs.

The A1696 is provided in a 3-pin SIP package (KH) that is

lead (Pb) free, with 100% tin leadframe plating.