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參數(shù)資料
| 型號： | ATS667LSGTN-T |
| 廠商： | Allegro Microsystems Inc |
| 文件頁數(shù)： | 8/14頁 |
| 文件大小： | 424K |
| 描述： | IC SENSOR GEAR TOOTH 4SIP |
| 產(chǎn)品培訓(xùn)模塊： | Current Sensor |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 傳感范圍： | 70% 空氣間隙跳閘，30% 空氣間隙釋放 |
| 類型： | 專用型 |
| 電源電壓： | 4 V ~ 24 V |
| 電流 - 電源： | 12mA |
| 電流 - 輸出（最大）： | 25mA |
| 輸出類型： | 數(shù)字，開路集電極 |
| 特點(diǎn)： | 輪齒類型 |
| 工作溫度： | -40°C ~ 150°C |
| 封裝/外殼： | 4-SIP |
| 供應(yīng)商設(shè)備封裝： | 4-SIP |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 1142 (CN2011-ZH PDF) |
| 其它名稱： | 620-1328-6 |
True Zero-Speed, High Accuracy Gear Tooth Sensor IC
ATS667LSG
8
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Functional Description
Hall Technology
The ATS667 contains a single-chip differential Hall-effect sensor
IC, a samarium cobalt pellet, and a flat ferrous pole piece (con-
centrator). 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
compensation circuitry. The Hall transducers and signal process-
ing electronics are integrated on the same silicon substrate, using
a proprietary BiCMOS process.
Target Profiling During Operation
An operating device is capable of providing digital information
that is representative of the mechanical features of a rotating gear.
The waveform diagram in figure 3 presents the automatic transla-
tion of the mechanical profile, through the magnetic profile that
it induces, to the digital output signal of the ATS667. No addi-
tional optimization is needed and minimal processing circuitry is
required. This ease of use reduces design time and incremental
assembly costs for most applications.
Determining Output Signal Polarity
In figure 3, the top panel, labeled Mechanical Position, represents
the mechanical features of the target gear and orientation to the
device. The bottom panel, labeled IC Output Signal, displays the
square waveform corresponding to the digital output signal that
results from a rotating gear configured as shown in figure 2, and
electrically connected as in figure 6. That direction of rotation (of
the gear side adjacent to the package face) 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 IC output switching from low state
to high state as the leading edge of a tooth (a rising mechanical
edge, as detected by the IC) passes the package face. In this con-
figuration, the device output switches to its high polarity when a
tooth is the target feature nearest to the package. 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 out-
put signal goes high when a falling edge is detected, and a valley
is nearest to the package.
Target (Gear)
Back-biasing
Rare-earth Pellet
South Pole
North Pole
Case
(Pin 1 Side)
(Pin 4 Side)
Hall IC
Pole Piece
Element Pitch
(Concentrator)
Dual-Element
Hall Effect Device
Hall Element 1
Hall Element 2
of Package
Rotating Target
Branded Face
1
4
B
OP(#1)
B
RP(#1)
B
RP(#2)
B
OP(#2)
On
Off
Off
On
IC Internal Switch State
Package Orientation to Target
IC Internal Differential Analog Signal, V
PROC
Mechanical Position (Target movement pin 1 to pin 4)
IC Output Signal, V
OUT
Target
(Gear)
(Package Top View)
Sensor Branded Face
Pin 1
Side
Pin 4
Side
Branded Face
Hall Element Pitch
Target Magnetic Profile
+B
This tooth
sensed earlier
This tooth
sensed later
Back-Biasing
Pellet
IC
Figure 1. Relative motion of the target is detected by the dual Hall
elements 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 state when a tooth of the target gear is nearest the
package face (see figure 3). A right-to-left (pin 4 to pin 1) rotation inverts
the output signal polarity.
Figure 3. The magnetic profile reflects the geometry of the target, allowing
the ATS667 to present an accurate digital output response.
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| ATS668LSMTN-T | 功能描述:THREE-WIRE DIFFERENTIAL SPEED SE 制造商:allegro microsystems, llc 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1 |
| ATS671LSE | 制造商:Allegro MicroSystems LLC 功能描述: |
| ATS671LSE-T | 制造商:Allegro MicroSystems LLC 功能描述: |
| ATS672LSB | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Self-Calibrating Gear Tooth Sensor with 9-Bit Signal Capture |
| ATS672LSB_03 | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Self-Calibrating Gear Tooth Sensor with 9-Bit Signal Capture |
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