A1140LUA Allegro Microsystems Inc, A1140LUA Datasheet - Page 9

• Manufacturer Part Number: A1140LUA
• Description: IC SWITCH HALL EFFECT UNI 3-SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Unipolar Switchr

Specifications of A1140LUA

• Sensing Range: 110G Trip, 45G Release
• Voltage - Supply: 3.5 V ~ 24 V
• Current - Supply: 5mA
• Output Type: Digital, Open Drain
• Features: Regulated Voltage
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 3-SIP
• Magnetic Type: Unipolar
• Operating Supply Voltage (min): 3.5V
• Operating Supply Voltage (typ): 5/9/12/15/18V
• Operating Supply Voltage (max): 24V
• Mag Sensor Operate Point (g): 110Gs
• Mag Sensor Release Point (g): 45Gs
• Mag Sensor Hysteresis(g): 15Gs
• Package Type: Ultra Mini SIP
• Pin Count: 3
• Mounting: Through Hole
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output (max): -
• Lead Free Status / Rohs Status: Not Compliant

A1140, A1142, and
A1143
Typical Application Circuit
The A114x 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 A114x 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 A114x 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, RS (not shown), in combina-
tion with C
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
, creates a filter for EMI pulses.
, installed in parallel with the A114x.
BYP
BYP
must ensure that the traces that connect it to
, connected between the supply, VCC,
S
For additional general application information, visit the Allegro
Web site at www. allegromicro.com.
CC
and the ECU sense resistor,
requirement of the A114x
BYP
reduces both external
BYP
, and it serves
Application Information
Sensitive Two-Wire Chopper-Stabilized
Unipolar Hall Effect Switches
Figure 3. Typical application circuit
V+
A
GND
A114x
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 μF
BYP
9