A3422LKA Allegro Microsystems Inc, A3422LKA Datasheet - Page 8

• Manufacturer Part Number: A3422LKA
• Description: IC SENSOR DIRECT/DETECT 5-SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Special Purposer

Specifications of A3422LKA

• Sensing Range: 75G Trip, -75G Release
• Voltage - Supply: 4.5 V ~ 18 V
• Current - Supply: 18mA
• Current - Output (max): 30mA
• Output Type: Digital, Open Collector
• Features: High Sensitivity
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 5-SIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Operation with Fine-Pitch Ring Magnets. For
targets with a circular pitch of less than 4mm, a perfor-
mance improvement can be observed by rotating the front
face of the device (see below). This device rotation
decreases the effective element-to-element spacing,
provided that the Hall elements are not rotated beyond the
width of the target.
A
www.allegromicro.com
1
2
1.50 mm
0.059"
3
4
5
TARGET FACE WIDTH, F
>0.059 SIN
>1.50 SIN
α
α
(mm)
(inch)
Applications Information
α
Applications. It is strongly recommended that an
external 0.01 µF bypass capacitor be connected (in close
proximity to the Hall elements) between the supply and
ground of the device to reduce both external noise and
noise generated by the internal logic.
cation Note 27701, or at
devices is a ring magnet. Other methods of operation,
such as linear magnets, are possible. Extensive applica-
tions information on magnets and Hall-effect devices is
also available in the “Hsall-Effect IC Applications Guide”
which can be found in the latest issue of the Allegro
MicroSystems Electronic Data Book, AMS-702 or Appli-
The simplest form of magnet that will operate these
Dwg. MH-024
www.allegromicro.com
DIRECTION-DETECTION
Rotated device for
fine-pitch ring
magnets
HALL-EFFECT,
SENSOR IC
3422
7