ATS632LSA

HALL-EFFECT

GEAR-TOOTH SENSOR

SUBASSEMBLY

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APPLICATIONS INFORMATION — Continued

Operation From a Regulated Power Supply. These

devices require minimal protection circuitry during opera-

tion from a low-voltage regulated line. The on-chip

voltage regulator provides immunity to power supply

variations between 4.5 V and 24 V. However, even while

operating from a regulated line, some supply and output

filtering is required to provide immunity to coupled and

injected noise on the supply line. A basic RC low-pass

filter circuit (R1C1) on the supply line and an optional

output capacitor (C2) is recommended for operation in

noisy environments. In extremely noisy environments, a

filter capacitor at pin 3 may also be required. Because the

device has an open collector output, an output pull-up

resistor must be added either at the sensor module or at

the controller.

The protection circuitry can easily be added to a PC

board for use with this device. Provisions have been

made for easy mounting of a PC board on the back of the

unit. PC board installation parallel to the device axis is

also possible.

Dwg. AH-007

1

2

3

4

3

Dwg. EH-008-3A

12

4

Vcc

20

Ω

R L

0.033

µF

100 pF

100 pF

OUTPUT

SUPPLY

C3

C2

C 1

R 1

X