A3423LK-T Allegro Microsystems Inc, A3423LK-T Datasheet - Page 2
![IC DIRECTION SENSOR 2CH 4-SIP](/photos/19/50/195032/a3423lk-t_sml.jpg)
A3423LK-T
Manufacturer Part Number
A3423LK-T
Description
IC DIRECTION SENSOR 2CH 4-SIP
Manufacturer
Allegro Microsystems Inc
Type
Special Purposer
Specifications of A3423LK-T
Package / Case
4-SIP
Sensing Range
55G Trip, -55G Release
Voltage - Supply
3.8 V ~ 24 V
Current - Supply
14mA
Current - Output (max)
30mA
Output Type
Digital, Open Collector
Features
Regulated Voltage
Operating Temperature
-40°C ~ 150°C
Output Current
30mA
Sensor Case Style
SIP
No. Of Pins
4
Supply Voltage Range
3.8V To 24V
Operating Temperature Range
-40°C To +150°C
Base Number
3423
Supply Voltage
RoHS Compliant
Svhc
No SVHC (15-Dec-2010)
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
620-1207
Features and Benefits
▪ Precisely aligned dual Hall elements
▪ Tightly matched magnetic switchpoints
▪ Speed and direction outputs
▪ Individual Hall element outputs (L package)
▪ Fast power-on time
▪ Output short circuit protection
▪ Operation from an unregulated power supply
▪ Wide operating temperature range
▪ Wide operating voltage range
▪ Integrated EMC-ESD protection
Packages
A3423-DS, Rev. 5
8-pin SOIC (suffix L)
Dual Channel Hall Effect Direction Detection Sensor IC
Not to scale
VCC
Regulator
4-pin SIP (suffix K)
Power-on
E1
E2
Logic
Functional Block Diagram
Trim
GND
Description
The A3423 is a dual-channel Hall-effect sensor IC ideal for
use in speed and direction sensing applications incorporating
encoder ring-magnet targets. The A3423 provides various output
signals that indicate speed and direction of target rotation. The
Hall elements are both photolithographically aligned to better
than 1 μm. Maintaining accurate displacement between the two
active Hall elements eliminates the major manufacturing hurdle
encountered in fine-pitch detection applications. The A3423 is
a highly sensitive, temperature-stable magnetic device ideal for
use in harsh automotive and industrial environments.
The Hall elements of the A3423 are spaced 1.63 mm apart,
which provides excellent speed and direction information
for small-geometry targets. Extremely low-drift amplifiers
guarantee symmetry between the switches to maintain signal
quadrature. An on-chip regulator allows the use of this device
over a wide operating voltage range of 3.8 to 24 V.
End-of-line trimming of the Hall element switchpoints provides
tight matching capability. The continuous-time nature of the
Hall elements delivers a fast start-up of the device and low
noise.
The A3423 has integrated protection against transients on
the supply and output pins and short-circuit protection on all
outputs.
The A3423 is available in a 4-pin SIP and a plastic 8-pin
SOIC surface mount package (the SOIC version is currently
in development). Both packages are lead (Pb) free, with 100%
matte tin leadframe plating.
Direction
Logic
L package only
L package only
Current
Current
Current
Current
Output
Output
Output
Output
Limit
Limit
Limit
Limit
OUTA
OUTB
DIR
SPD
A3423