A3251LLT Allegro Microsystems Inc, A3251LLT Datasheet - Page 13

• Manufacturer Part Number: A3251LLT
• Description: IC SW HALL EFFECT UNI SOT-89
• Manufacturer: Allegro Microsystems Inc
• Type: Unipolar Switchr

Specifications of A3251LLT

• Sensing Range: 50G
• Voltage - Supply: 4.2 V ~ 24 V
• Current - Supply: 10mA
• Current - Output (max): 20mA
• Output Type: Digital, Open Collector
• Features: Regulated Voltage
• Operating Temperature: -40°C ~ 150°C
• Package / Case: SOT-89-3
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A3250
A3251
For additional general application information, visit the Allegro
MicroSystems Web site at www. allegromicro.com.
Typical Application Circuit
It is strongly recommended that an external ceramic bypass
capacitor, C
between the VCC pin and the supply and GND pin to reduce
both external noise and noise generated by the chopper-stabiliza-
tion technique. (The diagram at the right shows C
C
A3250/A3251 are no greater than 5 mm in length. (For program-
ming the device, the capacitor may be further away from the
device, including mounting on the board used for programming
the device.)
The series resistor R
for EMI pulses. (Additional information on EMC is provided
on the Allegro MicroSystems Web site.) R
of approximately 800 mV. This must be taken into consider-
ation when determining the minimum VCC requirement for the
A3250/A3251. The pull-up resistor, R
limit the current through the output transistor; do not exceed the
maximum continuous output current of the device.
BYP
should be installed so that the traces that connect it to the
BYP
, in the range of 0.01 μF to 0.1 μF be connected
and
S
, in combination with C
L
, should be chosen to
S
will have a drop
BYP
creates a filter
Application Information
BYP
Field-Programmable, Chopper-Stabilized,
at 0.1 μF.)
Unipolar Hall-Effect Switches
Typical application circuit
A
V
Maximum separation 5 mm
from C
Supply
100 Ω
R
S
BYP
to device
C
0.1 μF
BYP
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
A
A
A3250/A3251
VCC
GND
VOUT
5V
R
1.2 kΩ
L
12