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參數(shù)資料
| 型號： | A3425L |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | HALL-EFFECT GEAR-TOOTH SENSORS -ACCOUPLED |
| 中文描述： | 霍爾效應(yīng)齒輪齒傳感器ACCOUPLED |
| 文件頁數(shù)： | 5/10頁 |
| 文件大小： | 144K |
| 代理商： | A3425L |
3059
AND
3060
HALL-EFFECT
GEAR-TOOTH SENSORS
—AC COUPLED
www.allegromicro.com
5
24 V
MAX
0
+B
0
O
DIFFERENTIAL FLUX DENSITY, B
E1
– B
E2
Dwg. GH-034
-B
OP
RP
B
B
V
OUT(SAT)
Figure 2
OP
B
B
E1 E2
GEAR
4300 G
4130 G
150 G
0 G
-150 G
RP
B
V
OUT(SAT)
V
OUT
B & B
OUTPUT DUTY CYCLE
≈
50%
Dwg. WH-003-1
DIRECTION
LEADING
EDGE
TRAILING
EDGE
NORTH
SOUTH
E2
E1
(a)
(b)
(c)
Sensor Operation.
These sensor ICs each contain
two integrated Hall transducers (E1 and E2) that are used
to sense a magnetic field differential across the face of the
IC (see Sensor Location drawing). Referring to Figure 1,
the trigger switches the output ON (output LOW) when
B
E1
- B
E2
<
B
OP
and switches the output OFF (output
HIGH) when B
E1
- B
E2
< B
RP
. The difference between B
OP
and B
RP
is the hysteresis of the device.
Figure 2 relates the output state of a back-biased
sensor IC, with switching characteristics shown in Figure
1, to the target gear profile and position. Assume a north
pole back-bias configuration (equivalent to a south pole at
the face of the device). The motion of the gear produces
a phase-shifted field at E1 and E2 (Figure 2(a)); internal
conditioning circuitry subtracts the fields at the two
elements (Figure 2(b)); this differential field is band-pass
filtered to remove dc offset components and then fed into
a Schmitt trigger; the Schmitt trigger switches the output
transistor at the thresholds B
OP
and B
RP
. As shown
(Figure 2(c)), the IC output is LOW whenever sensor E1
sees a (ferrous) gear tooth and sensor E2 faces air. The
output is HIGH when sensor E1 sees air and sensor E2
sees the ferrous target.
AC-Coupled Operation.
Steady-state magnet and
system offsets are eliminated using an on-chip differential
band-pass filter. The lower frequency cut-off of this
patented filter is set using an external capacitor the value
of which can range from 0.01
μ
F to 10
μ
F. The high-
frequency cut-off of this filter is set at 30 kHz by an
internal integrated capacitor.
The differential structure of this filter enables the IC to
reject single-ended noise on the ground or supply line
and, hence, makes it resistant to radio-frequency and
electromagnetic interference typically seen in hostile
remote sensing environments. This filter configuration
also increases system tolerance to capacitor degradation
at high temperatures, allowing the use of an inexpensive
external ceramic capacitor.
Figure 1
TYPICAL TRANSFER
CHARACTERISTIC
APPLICATIONS INFORMATION (cont’d)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| A3064 | HALL-EFFECT GEAR-TOOTH SENSOR -AC COUPLED |
| A3064LKA | HALL-EFFECT GEAR-TOOTH SENSOR -AC COUPLED |
| A3064LKA-TL | HALL-EFFECT GEAR-TOOTH SENSOR -AC COUPLED |
| A30RBE | Center Tap Chip Resistor |
| A30RDC | Center Tap Chip Resistor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A3425LK | 制造商:Allegro MicroSystems 功能描述:Hall Effect Sensor Bipolar 5V/9V/12V/15V 4-Pin SIP Bulk |
| A3425LK-T | 功能描述:IC SWITCH BIPO DUAL OUT 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(zhǔn)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 |
| A3425LK-T | 制造商:Allegro MicroSystems 功能描述:Hall Effect Switch IC |
| A3425LKTN | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch |
| A3425LKTN-T | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch |
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