A1184_06 ALLEGRO [Allegro MicroSystems], A1184_06 Datasheet - Page 8

• Manufacturer Part Number: A1184_06
• Description: Standard Two-Wire Field-Programmable Chopper-Stabilized Unipolar Hall-Effect Switches
• Manufacturer: ALLEGRO [Allegro MicroSystems]

A1184
For additional general application information, visit the Allegro
MicroSystems Web site at www. allegromicro.com.
Typical Application Circuit
The A118x family of devices must be protected by an external
bypass capacitor, C
and the ground, GND, of the device. C
noise and the noise generated by the chopper-stabilization func-
tion. As shown in figure 3, a 0.01 μF capacitor is typical.
Installation of C
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 C
only to protect the A118x internal circuitry. As a result, the load
ECU (electronic control unit) must have sufficient protection,
other than C
A series resistor on the supply side, R
nation with C
information on EMC is provided on the Allegro MicroSystems
Web site.)
When determining the minimum V
device, the voltage drops across R
R
R
SENSE
SENSE
, must be taken into consideration. The typical value for
is approximately 100 Ω.
BYP
BYP
, installed in parallel with the A118x.
BYP
, creates a filter for EMI pulses. (Additional
BYP
must ensure that the traces that connect it to
, connected between the supply, VCC,
S
CC
and the ECU sense resistor,
S
requirement of the A118x
Chopper-Stabilized Unipolar Hall Effect Switch
BYP
(not shown), in combi-
reduces both external
BYP
, and it serves
Application Information
Standard Two-Wire Field-Programmable
Figure 3. Typical application circuit
V+
A
GND
A118x
ECU
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
VCC
R
GND
SENSE
A
B
Package UA Only
Maximum separation 5 mm
B
B
C
0.01 uF
BYP
8