DESCRIPTION

The ATS696PSM 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

ATS696 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 a ferromagnetic target.

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 ATS696 is provided in a 3-pin SIP package (SM) that is

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

ATS696PSM-DS

MCO-0000519

FEATURES AND BENEFITS

• Allegro SM package with integrated EMC components

reduces need for external EMI protection

• Integrated back-biasing rare-earth pellet

• Digital output with speed and direction information

provides ferromagnetic target position information

• Enhanced algorithms provide low jitter and high output

accuracy performance

• Center of package switching alignment

• 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

Position Sensor IC

with Speed and Direction Output

Figure 1: Functional Block Diagram

ATS696PSM

Not to scale

PACKAGE:

Current

Limit

Hall

Amp

ADC

GND

Internal Regulator

(Analog)

VCC

Die

Package

OUT

Internal Regulator

(Digital)

Hall

Amp

Low Pass

Filter

Low Pass

Filter

ADC

EEPROM

Synchronous

Digital Controller

Direction Detection Logic

Stop Mode Timer

Application Trim

Temperature Compensation

Temperature

Transducer

October 26, 2018

3-pin SIP (suffix SM)