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參數(shù)資料
| 型號： | ATS643LSH |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor with Continuous Update |
| 中文描述： | 自校準，零的高速連續(xù)更新差動齒輪齒傳感器 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 501K |
| 代理商： | ATS643LSH |
9
ATS643-DS, Rev. 1
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Self-Calibrating, Zero-Speed Differential GTS with Continuous Update
ATS643LSH
Sensing Technology.
The ATS643 module contains a
single-chip differential Hall effect sensor IC, a samarium cobalt
magnet, and a flat ferrous pole piece (concentrator). As shown
in figure 1, the Hall IC supports two Hall elements, which sense
the magnetic profile of the ferrous gear target simultaneously,
but at different points (spaced at a 2.2 mm pitch), generating a
differential internal analog voltage (V
PROC
) that is processed for
precise switching of the digital output signal.
The Hall IC is self-calibrating and also possesses a tempera-
ture compensated amplifier and offset cancellation circuitry. Its
voltage regulator provides supply noise rejection throughout the
operating voltage range. Changes in temperature do not greatly
affect this device due to the stable amplifier design and the offset
rejection circuitry. The Hall transducers and signal processing
electronics are integrated on the same silicon substrate, using a
proprietary BiCMOS process.
Target Profiling During Operation.
When proper power is
applied to the sensor, it is capable of providing digital informa-
tion that is representative of the mechanical features of a rotating
gear. The waveform diagram in figure 3 presents the automatic
translation of the mechanical profile, through the magnetic
profile that it induces, to the digital output signal of the ATS643.
No additional optimization is needed and minimal processing
circuitry is required. This ease of use reduces design time and
Functional Description
Target (Gear)
Back-biasing Magnet
South Pole
North Pole
Case
(Pin 1 Side)
(Pin
n
>1 Side)
Hall IC
Pole Piece
(Concentrator)
Element Pitch
Dual-Element
Hall Effect Device
Hall Element 1
Hall Element 2
of Sensor
Rotating Target
Branded Face
1
4
incremental assembly costs for most applications.
Determining Output Signal Polarity.
In figure 3, the top
panel, labeled
Mechanical Position
, represents the mechani-
cal features of the target gear and orientation to the device. The
bottom panel, labeled
Sensor Output Signal
, displays the square
waveform corresponding to the digital output signal that results
from a rotating gear configured as shown in figure 2. That direc-
tion of rotation (of the gear side adjacent to the face of the sensor)
is: perpendicular to the leads, across the face of the device, from
the pin 1 side to the pin 4 side. This results in the sensor output
switching from low, I
CC(Low)
, to high, I
CC(High)
, as the leading
edge of a tooth (a rising mechanical edge, as detected by the
sensor) passes the sensor face. In this configuration, the device
output current switches to its high polarity when a tooth is the
target feature nearest to the sensor. If the direction of rotation is
reversed, so that the gear rotates from the pin 4 side to the pin 1
side, then the output polarity inverts. That is, the output signal
goes high when a falling edge is detected, and a valley is the
nearest to the sensor. Note, however, that the polarity of I
OUT
depends on the position of the sense resistor, R
SENSE
(see Operat-
ing Characteristics table).
Continuous Update of Switchpoints
. Switchpoints are the
threshold levels of the differential internal analog signal, V
PROC
,
at which the device changes output signal polarity. The value of
Figure 1. Relative motion of the target is detected by the dual Hall ele-
ments mounted on the Hall IC.
Figure 2. This left-to-right (pin 1 to pin 4) direction of target rotation
results in a high output signal when a tooth of the target gear is nearest
the face of the sensor (see figure 3). A right-to-left (pin 4 to pin 1) rota-
tion inverts the output signal polarity.
Figure 3. The magnetic profile reflects the geometry of the target, allow-
ing the ATS643 to present an accurate digital output response.
B
OP(#1)
B
RP(#1)
B
OP(#2)
On
Off
Off
On
Sensor Internal Switch State
Sensor Orientation to Target
Sensor Internal Differential Analog Signal, V
PROC
Mechanical Position (Target movement pin 1 to pin 4)
Sensor Output Signal, I
OUT
Target
(Gear)
Sensor
Sensor Branded Face
Pin 1
Side
Pin 4
Side
+t
Target Magnetic Profile
+B
+t
+t
This tooth
sensed
earlier
This tooth
sensed
later
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| ATS643LSH-I1 | Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor with Continuous Update |
| ATS643LSHTN-I1-T | Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor with Continuous Update |
| ATS643LSHTN-I2-T | Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor with Continuous Update |
| ATS645LSHTN-I1-T | True Zero Speed Miniature Gear Tooth Sensor |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ATS643LSH-I1 | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor with Continuous Update |
| ATS643LSH-I1TN | 功能描述:IC SENSOR GEAR TOOTH 4-SIP RoHS:否 類別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應(yīng)，數(shù)字式開關(guān)，線性，羅盤 (IC) 系列:- 標(biāo)準包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類型:旋轉(zhuǎn) 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類型:數(shù)字式，PWM，8.5 位串行 特點:可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
| ATS643LSH-I2 | 功能描述:IC SENSOR GEAR TOOTH 4-SIP RoHS:否 類別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應(yīng)，數(shù)字式開關(guān)，線性，羅盤 (IC) 系列:- 標(biāo)準包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類型:旋轉(zhuǎn) 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類型:數(shù)字式，PWM，8.5 位串行 特點:可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
| ATS643LSHTN-I1-T | 功能描述:IC SENSOR GEAR TOOTH 4-SIP RoHS:是 類別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應(yīng)，數(shù)字式開關(guān)，線性，羅盤 (IC) 系列:- 標(biāo)準包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類型:旋轉(zhuǎn) 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類型:數(shù)字式，PWM，8.5 位串行 特點:可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
| ATS643LSHTN-I2-T | 功能描述:IC SENSOR GEAR TOOTH 4-SIP RoHS:是 類別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應(yīng)，數(shù)字式開關(guān)，線性，羅盤 (IC) 系列:- 標(biāo)準包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類型:旋轉(zhuǎn) 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類型:數(shù)字式，PWM，8.5 位串行 特點:可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
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