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參數(shù)資料
| 型號： | A1186LUA-T |
| 廠商： | Allegro Microsystems Inc |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 509K |
| 描述： | IC SWITCH HALL EFFECT UNI 3-SIP |
| 產(chǎn)品培訓(xùn)模塊： | Current Sensor |
| 標(biāo)準(zhǔn)包裝： | 500 |
| 傳感范圍： | 10G ~ 60G 跳閘 - 可編程，固定釋放 |
| 類型： | 單極開關(guān) |
| 電源電壓： | 3.5 V ~ 24 V |
| 電流 - 電源： | 6.9mA |
| 輸出類型： | 數(shù)字，開路集電極 |
| 特點(diǎn)： | 可編程 |
| 工作溫度： | -40°C ~ 150°C |
| 封裝/外殼： | 3-SIP |
| 供應(yīng)商設(shè)備封裝： | 3-SIP |
| 包裝： | 散裝 |
Ultrasensitive Two-Wire Field-Programmable
Chopper-Stabilized Unipolar Hall Effect Switches
A1185 and
A1186
8
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Application Information
For additional general application information, visit the Allegro
Web site at www. allegromicro.com.
GND
A118x
VCC
V+
0.01 uF
A
B
B
GND
ECU
Package UA Only
A
B
Maximum separation 5 mm
R
SENSE
C
BYP
Figure 3. Typical application circuit
Typical Application and Programming Circuit
The A118x family of devices MUST be protected by an exter-
nal bypass capacitor, C
BYP
, connected between the supply pin,
VCC, and the ground pin, GND, of the device. C
BYP
reduces
both external noise and the noise generated by the chopper-sta-
bilization function. As shown in figure 3, a 0.01 糉 capacitor
is typical. (For programming the device, a 0.1 糉 capacitor is
recommended for proper fuse blowing.)
Installation of C
BYP
must ensure that the traces that connect
it to the A118x pins are no greater than 5 mm in length. (For
programming the device, the capacitor may be further away from
the device, including mounting on the board used for program-
ming the device.)
C
BYP
serves only to protect the A118x internal circuitry. All
high-frequency interferences conducted along the supply lines
are passed directly to the load through C
BYP
. As a result, the
load ECU (electronic control unit) must have sufficient protec-
tion, other than C
BYP
, installed in parallel with the A118x.
A series resistor on the supply side, R
S
(not shown), in combina-
tion with C
BYP
, creates a filter for EMI pulses.
When determining the minimum V
CC
requirement of the A118x
device, the voltage drops across R
S
and the ECU sense resistor,
R
SENSE
, must be taken into consideration. The typical value for
R
SENSE
is approximately 100 ? (All programming, including
code and lock-bit programming, should be done with direct
connections to VCC and GND, with the use of a 0.1uF bypass
capacitor. Programming across the series resistor or sense resis-
tor may not allow enough energy to properly blow the fuses
in the device, as required for proper programming. The result
would be incorrect switchpoints.
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