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參數(shù)資料
| 型號(hào)： | ATS612LSG |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | DYNAMIC, SELF-CALIBRATING, PEAK-DETECTING, DIFFERENTIAL HALL-EFFECT GEAR-TOOTH SENSOR |
| 中文描述： | 動(dòng)態(tài)，自校準(zhǔn)，峰值檢測(cè)，差分霍爾效應(yīng)齒輪齒傳感器 |
| 文件頁(yè)數(shù)： | 14/16頁(yè) |
| 文件大?。?/td> | 208K |
| 代理商： | ATS612LSG |
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115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ATS612LSB
DYNAMIC, SELF-CALIBRATING, PEAK-DETECTING,
DIFFERENTIAL HALL-EFFECT GEAR-TOOTH SENSOR
14
Operation From a Regulated Power Supply
. These
devices require minimal protection circuitry during opera-
tion from a low-voltage regulated line. The on-chip voltage
regulator provides immunity to power supply variations
between 3.6V and 24V. However, even while operating
from a regulated line, some supply and output filtering is
required to provide immunity to coupled and injected noise
on the supply line. A basic RC low-pass circuit (R
1
C
1
) on
the supply line and an optional output capacitor (C
2
) is
recommended for operation in noisy environments.
Because the device has an open-collector output, an
output pull-up resistor (R
L
) must be included either at the
sensor output (pin 2) or by the signal processor input.
sufficiently high reverse breakdown capabilities so as to
withstand the most negative transient. The current-limiting
resistor (R
Z
) and the Zener diode should be sized for
power dissipation requirements.
Capacitor Requirements.
The choice of the capacitor at
pin 3 (C
3
) defines the minimum operating speed of the
target. This capacitor (0.1
μ
F minimum) is required to
stabilize the internal amplifiers as well as to eliminate the
signal offsets. Typically, a 0.22
μ
F low-leakage ceramic
capacitor is recommended. Values greater than 0.47
μ
F
should not be used as this may cause high-speed perfor-
mance degradation.
Capacitor leakage current at pin 3 will cause degra-
dation in the low-speed performance of the device. Ex-
cess capacitor leakage can result in the sensor changing
output state without movement of the gear tooth being
sensed. In addition to the capacitor leakage, it is ex-
tremely important to minimize the leakage at the PC board
and between the pins of the sensor. Up to 50nA of
external leakage can be tolerated at the capacitor pin node
to ground. Choice of low-leakage-current potting com-
pounds and the use of clean PC board techniques are
extremely important.
Additional applications Information on gear-tooth
and other Hall-effect sensors is provided in the
Allegro
Integrated and Discrete Semiconductors Data Book
or
Application Note
27701.
3
X
X
+
-
1
2
4
Vcc
Dwg. EH-008A
20
R 1
R
0.033
μ
F
0.22
μ
F
C
100 pF
OUTPUT
SUPPLY
0.033
μ
F
C S
2.5 k
6.8 V
C
C
R Z
3
X
X
Dwg. EH-008-1A
+
-
1
2
4
Vcc
20
R 1
R L
0.033
μ
F
0.22
μ
F
C3
100 pF
OUTPUT
SUPPLY
C2
C1
Operation From an Unregulated Power Supply
. In
automotive applications, where the device receives its
power from an unregulated supply such as the battery, full
protection is generally required so that the device can
withstand the many supply-side transients. Specifications
for such transients vary between car manufacturers, and
protection-circuit design should be optimized for each
application. In the circuit below, a simple Zener-controlled
regulator is constructed using discrete components. The
RC low-pass filter on the supply line (R
1
C
1
) and a low-
value supply bypass capacitor (C
S
) can be included, if
necessary, so as to minimize susceptibility to EMI/RFI.
The npn transistor should be chosen with sufficiently high
forward breakdown voltage so as to withstand supply-side
transients. The series diode should be chosen with
APPLICATIONS INFORMATION — Continued
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| ATS-61300R-C1-R0 | 功能描述:散熱片 FANSINK ASSY 29.25 X 29.25 X 19.5 (MM) RoHS:否 制造商:Ampro By ADLINK 產(chǎn)品:Heat Sink Accessories 安裝風(fēng)格:Through Hole 散熱片材料: 散熱片樣式: 熱阻: 長(zhǎng)度: 寬度: 高度: 設(shè)計(jì)目的:Express-HRR |
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