Allegro MicroSystems A3423
The A3423 is a dual-channel Hall-effect sensor IC ideal for use in speed and direction sensing applications incorporating encoder ring-magnet targets.TheA3423 provides various output signals that indicate speed and direction of target rotation. The Hall elements are both photolithographically aligned to better than 1 μm. The A3423 is a highly sensitive, temperature-stable magnetic device ideal for use in harsh automotive and industrial environments.| Part No. | A3423 |
|---|---|
| Datasheet | A3423 Download |
| Manufacturer |  Allegro MicroSystems |
| Description | Dual Channel Hall Effect Direction Detection Sensor |
| Buy | Stock & Price |
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 8-pin SOIC (suffix L) 4-pin SIP (suffix K) Not to scale
DESCRIPTION
Maintaining accurate displacement between the two active Hall elements eliminates the major manufacturing hurdle encountered in fine-pitch detection applications. 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.
