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| 型號(hào)： | ATS627LSGTN-T |
| 廠商： | Allegro Microsystems Inc |
| 文件頁(yè)數(shù)： | 17/22頁(yè) |
| 文件大?。?/td> | 498K |
| 描述： | IC HALL EFFECT GEAR SENSOR 4-SIP |
| 特色產(chǎn)品： | ATS627 Position Sensor IC |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 傳感范圍： | 3mT ~ 120mT |
| 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 |
| 其它名稱： | 620-1398-6 |
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True Zero Speed, Low Jitter, High Accuracy
Position Sensor IC
ATS627LSG
17
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Undervoltage Lockout
When the supply voltage falls below the undervoltage lockout
voltage, V
CC(UV)
, the device enters Reset, where the output
state returns to the Power-On State (POS) until sufficient V
CC
is supplied. This lockout feature prevents false signals, caused
by undervoltage conditions, from propagating to the output of
the IC.
Power Supply Protection
The device contains an on-chip regulator and can operate over a
wide V
CC
range. For devices that must operate from an unregu-
lated power supply, transient protection must be added externally.
For applications using a regulated line, EMI/RFI protection
may still be required. Contact Allegro
"
for information on the
circuitry needed for compliance with various EMC specifications.
Refer to figure 9 for an example of a basic application circuit.
Automatic Gain Control (AGC)
This feature allows the device to operate with an optimal internal
electrical signal, regardless of the air gap (within the AG speci-
fication). At power-on, the device determines the peak-to-peak
amplitude of the signal generated by the target.
This feature is also active in Running mode, though very conser-
vatively invoked, to optimize the signal amplitude in the scenario
where signal amplitude during the initial calibration period is not
representative of the Running mode signal.
Automatic Offset Adjust (AOA)
The AOA circuitry automatically compensates for the effects of
chip, magnet, and installation offsets. This circuitry is continu-
ously active, including during both Power-on mode and Running
mode, compensating for any offset drift (within the Allowable
User Induced Differential Offset). Continuous operation also
allows it to compensate for offsets induced by temperature varia-
tions over time. This circuitry works with the AGC during cali-
bration to adjust V
PROC
in the internal range to allow the DACs
to acquire the signal peaks.
Bounded Update
The ATS627 continuously updates its switchpoints based on the
actual signal being received from the target. When the output
switches, the sensor resets the tracking DACs so that each proper
magnetic signal peak can be acquired. To prevent establishing
switchpoints on outlier signal maxima, tracking is limited, or
bounded, in magnitude. If such limiting were not applied, then
anomalous target features, such as bent, broken or misformed
teeth, could create significant output accuracy errors (see fig-
ure 8).
Running Mode Lockout
The ATS627 has a Running mode lockout feature to prevent
switching in response to small amplitude input signals that are
characteristic of vibration signals. The internal logic of the chip
interprets small signal amplitudes below a certain level to be the
result of target vibration. The output is held to the state present
prior to lockout, until the amplitude of the signal returns to nor-
mal operational levels.
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