Electronic Components Datasheet Search |
|
A3230 Datasheet(PDF) 7 Page - Allegro MicroSystems |
|
A3230 Datasheet(HTML) 7 Page - Allegro MicroSystems |
7 / 12 page Chopper-Stabilized Hall Effect Bipolar Switch A3230 7 Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Functional Description BHYS VOUT(SAT) V+ 0 BHYS VOUT(SAT) V+ 0 BHYS VOUT(SAT) V+ 0 VCC VCC VCC B+ B– B+ B– 0 0 B+ B– 0 VCC VS Sensor Output GND VOUT RLOAD A3230 0.1 µF CBYP Operation The output of these devices switches low (turns on) when a magnetic field perpendicular to the Hall sensor exceeds the operate point threshold, BOP. After turn-on, the output voltage is VOUT(SAT). The output transistor is capable of sinking current up to the short circuit current limit, IOM, which is a minimum of 30 mA. When the magnetic field is reduced below the release point, BRP, the device output goes high (turns off). The differ- ence in the magnetic operate and release points is the hysteresis, BHYS, of the device. This built-in hysteresis allows clean switch- ing of the output even in the presence of external mechanical vibration and electrical noise. There are three switching modes for bipolar devices, referred to as latch, unipolar switch, and negative switch. Mode is deter- mined by the switchpoint characteristics of the individual device. Note that, as shown in figure 1, these switchpoints can lie in either north or south polarity ranges. The values of the magnetic parameters for the A3230 are specified in the Magnetic Charac- teristics table, on page 3. Bipolar devices typically behave as latches (although these devices are not guaranteed to do so). In this mode, magnetic fields of opposite polarity and equivalent strengths are needed to switch the output. When the magnetic fields are removed (B → 0) the device remains in the same state until a magnetic Figure 1. Bipolar Device Output Switching Modes. These behaviors can be exhibited when using a circuit such as that shown in panel D. Panel A displays the hysteresis when a device exhibits latch mode (note that the BHYS band incorporates B= 0), panel B shows unipolar switch behavior (the BHYS band is more positive than B = 0), and panel C shows negative switch behavior (the BHYS band is more negative than B = 0). Bipolar devices, such as the A3230, can operate in any of the three modes. (A) (B) (C) (D) field of the opposite polarity and of sufficient strength causes it to switch. The hysteresis of latch mode behavior is shown in panel A of figure 1. In contrast to latching, when a device exhibits unipolar switch- ing, it only responds to a south magnetic field. The field must be of sufficient strength, > BOP, for the device to operate. When the field is reduced beyond the BRP level, the device switches back to the high state, as shown in panel B of figure 1. Devices |
Similar Part No. - A3230 |
|
Similar Description - A3230 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |