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參數(shù)資料
| 型號： | ATS645LSHTN-I2-T |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | True Zero Speed Miniature Gear Tooth Sensor |
| 中文描述： | 真正的零速微型齒輪齒傳感器 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大小： | 418K |
| 代理商： | ATS645LSHTN-I2-T |
True Zero Speed Miniature Differential Peak-
Detecting Gear Tooth Sensor
ATS645LSH
11
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
SENSOR OPERATION
Each operating mode is described in detail below.
Power-On
When power (V
CC
> V
CCMIN
) is applied to the device, a short
period of time is required to power the various portions of the
IC. During this period, the ATS645 is guaranteed to power-on in
the high current state, I
CC(High)
.
Initial Offset Adjust
The sensor intially cancels the effects of chip, magnet, and
installation offsets. Once offsets have been cancelled, the digital
tracking DAC is ready to track the signal and provide output
switching. The period of time required for both Power-On and
Initial Offset Adjust is de
fi
ned as the Power-On Time.
Calibration Mode
The calibration mode allows the sensor to automatically select
the proper signal gain and continue to adjust for offsets. The
AGC is active, and selects the optimal signal gain based on the
amplitude of the V
PROC
signal. Following each adjustment to
the AGC DAC, the Offset DAC is also adjusted to ensure the
internal analog signal is properly centered.
During this mode, the tracking DAC is active and output switch-
ing occurs, but the duty cycle is not guaranteed to be within
speci
fi
cation.
Diagnostics
The regulated current output is con
fi
gured for two wire appli-
cations, requiring one less wire for operation than do switches
with the more traditional open-collector output. Additionally,
the system designer inherently gains diagnostics because there
is always output current flowing, which should be in either of
two narrow ranges. Any current level not within these ranges
indicates a fault condition.
Running Mode
After the initial calibration period, C
I
, during which a signal
gain is established, the device moves to Running mode. During
Running mode, the sensor tracks the input signal and gives an
output edge for every peak of the signal. AOA remains active to
compensate for any offset drift over time.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ATS651LSH | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Two-Wire Self-Calibrating Differential Speed and Direction Sensor with Vibration Immunity |
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| ATS651LSHTN-T | 制造商:Allegro MicroSystems LLC 功能描述:GEAR TOOTH SENSOR 2-WIRE SH MODULE |
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