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参数资料
| 型号： | A3421EKA |
| 厂商： | Allegro MicroSystems, Inc. |
| 英文描述： | HALL-EFFECT, DIRECTION-DETECTION SENSORS |
| 中文描述： | 霍尔效应，方向检测传感器 |
| 文件页数： | 10/12页 |
| 文件大小： | 160K |
| 代理商： | A3421EKA |
3421 AND 3422
HALL-EFFECT,
DIRECTION-DETECTION
SENSORS
www.allegromicro.com
Outputs. The device provides three saturated outputs:
DIRECTION, E1 OUTPUT, and SPEED. DIRECTION
provides the direction output of the sensor and is defined
as OFF (high) for the direction E1 to E2 and ON (low) for
the direction E2 to E1. SPEED provides an XOR’d output
of the two sensors. Because of internal delays, DIREC-
TION will always be updated before SPEED and is
updated at every transition of E1 OUTPUT and E2 OUT-
PUT (internal) allowing the use of up-down counters
without the loss of pulses.
Power-On State. At power on, the logic circutry is reset
to provide an OFF (high) at DIRECTION and an OFF
(high) for E1 and E2 (internal) for magnetic fields less
than BOP. This eliminates ambiguity when the device is
powered up and either sensor detects a field between BOP
and BRP. If either sensor is subjected to a field greater than
BOP, the internal logic will set accordingly.
The integrated circuit contains an internal voltage regula-
tor that powers the Hall sensors and both the analog and
digital circuitry. This regulator allows operation over a
wide supply voltage range and provides some immunity to
supply noise. The device also contains CMOS logic
circuitry that decodes the direction of rotation of the ring
magnet.
Quadrature/Direction Detection. Internal logic
circuitry provides outputs representing speed and direction
of the magnetic field across the face of the package. For
the direction signal to be appropriately updated, a quadra-
ture relationship must be maintained between the ring
magnet pole width*, the sensor-to-sensor spacing, and, to a
lesser extent, the magnetic switch points. For optimal
design, the sensor should be actuated with a ring magnet
pole width* two times the sensor-to-sensor spacing. This
will produce a sinusoidal magnetic field whose period
(denoted as
Τ) is then four times the sensor-to-sensor
spacing. A quadrature relationship can also be maintained
for a ring magnet that has a period that satisfies the rela-
tionship n
Τ/4 = 1.5 mm, where n is any odd integer.
Therefore, ring magnets with pole-pair spacings equal to 6
mm (n = 1), 2 mm (n = 3), 1.2 mm (n = 5), etc. are permit-
ted.
The response of the device to the magnetic field
produced by a rotating ring magnet is shown on page 2.
Note the phase shift between the two integrated sensors.
* “Pole” refers to a single pole (North or South) unless
stated as “pole pair” (North and South).
FUNCTIONAL DESCRIPTION
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A3421LKA | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:HALL-EFFECT, DIRECTION-DETECTION SENSORS |
| A3421XKA | 制造商:未知厂家 制造商全称:未知厂家 功能描述:HALL-EFFECT. DIRECTION-DETECTION SENSORS |
| A3422EKA | 功能描述:IC SENSOR DIRECT/DETECT 5-SIP RoHS:否 类别:传感器，转换器 >> 磁性 - 霍尔效应，数字式开关，线性，罗盘 (IC) 系列:- 标准包装:1 系列:- 传感范围:20mT ~ 80mT 类型:旋转 电源电压:4.5 V ~ 5.5 V 电流 - 电源:15mA 电流 - 输出（最大）:- 输出类型:数字式，PWM，8.5 位串行 特点:可编程 工作温度:-40°C ~ 150°C 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商设备封装:20-SSOP 包装:Digi-Reel® 其它名称:AS5132-HSST-500DKR |
| A3422EKA-T | 功能描述:IC SENSOR DIRECT/DETECT 5-SIP RoHS:是 类别:传感器，转换器 >> 磁性 - 霍尔效应，数字式开关，线性，罗盘 (IC) 系列:- 标准包装:1 系列:- 传感范围:20mT ~ 80mT 类型:旋转 电源电压:4.5 V ~ 5.5 V 电流 - 电源:15mA 电流 - 输出（最大）:- 输出类型:数字式，PWM，8.5 位串行 特点:可编程 工作温度:-40°C ~ 150°C 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商设备封装:20-SSOP 包装:Digi-Reel® 其它名称:AS5132-HSST-500DKR |
| A3422EKA-T | 制造商:Allegro MicroSystems 功能描述:Driver IC Package/Case:5-SIP |
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