參數(shù)資料
型號(hào): A1181EUA-T
廠商: Allegro MicroSystems, Inc.
英文描述: Sensitive Two-Wire Field-Programmable Chopper-Stabilized Unipolar Hall-Effect Switches
中文描述: 敏感雙線現(xiàn)場(chǎng)可編程斬波穩(wěn)定單極霍爾效應(yīng)開關(guān)
文件頁數(shù): 2/16頁
文件大?。?/td> 356K
代理商: A1181EUA-T
10
A1180-DS, Rev. 2
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
www.allegromicro.com
Allegro MicroSystems, Inc.
Sensitive Two-Wire Field-Programmable Chopper-Stabilized Unipolar Hall Effect Switches
A1180/81/82/83
Application Information
For additional general application information, visit the Allegro
MicroSystems Web site at www. allegromicro.com.
GND
A118x
VCC
V+
0.01 uF
A
B
GND
ECU
Package UA Only
A
B Maximum separation 5 mm
R
SENSE
C
BYP
Figure 3. Typical application circuit
Typical Application Circuit
The A118x family of devices must be protected by an external
bypass capacitor, CBYP, connected between the supply, VCC,
and the ground, GND, of the device. CBYP reduces both external
noise and the noise generated by the chopper-stabilization func-
tion. As shown in gure 3, a 0.01 μF capacitor is typical.
Installation of CBYP must ensure that the traces that connect it to
the A118x pins are no greater than 5 mm in length.
All high-frequency interferences conducted along the supply
lines are passed directly to the load through CBYP, and it serves
only to protect the A118x internal circuitry. As a result, the load
ECU (electronic control unit) must have sufcient protection,
other than CBYP, installed in parallel with the A118x.
A series resistor on the supply side, RS (not shown), in combi-
nation with CBYP, creates a lter for EMI pulses. (Additional
information on EMC is provided on the Allegro MicroSystems
Web site.)
When determining the minimum VCC requirement of the A118x
device, the voltage drops across RS and the ECU sense resistor,
RSENSE, must be taken into consideration. The typical value for
RSENSE is approximately 100 Ω.
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