A1180LLHLT Allegro Microsystems Inc, A1180LLHLT Datasheet - Page 10

• Manufacturer Part Number: A1180LLHLT
• Description: IC SWITCH HALL EFFECT UNI SOT-23
• Manufacturer: Allegro Microsystems Inc
• Type: Unipolar Switchr

Specifications of A1180LLHLT

• Sensing Range: 60G ~ 200G Trip - Programmable, Fixed Release
• Voltage - Supply: 3.5 V ~ 24 V
• Current - Supply: 5mA
• Output Type: Digital, Open Collector
• Features: Programmable
• Operating Temperature: -40°C ~ 150°C
• Package / Case: SOT-23W
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output (max): -

A1180, A1181,
A1182,
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 fi gure 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 suffi cient 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.
and
BYP
BYP
, installed in parallel with the A118x.
BYP
A1183
, creates a fi lter for EMI pulses. (Additional
BYP
must ensure that the traces that connect it to
, connected between the supply, VCC,
S
Chopper-Stabilized Unipolar Hall Effect Switches
CC
and the ECU sense resistor,
S
requirement of the A118x
BYP
(not shown), in combi-
reduces both external
BYP
, and it serves
Application Information
Sensitive Two-Wire Field-Programmable
Figure 3. Typical application circuit
V+
A
GND
A118x
ECU
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
VCC
R
GND
SENSE
A
B
Package UA Only
Maximum separation 5 mm
B
B
C
0.01 uF
BYP
9