A3251LLT Allegro Microsystems Inc, A3251LLT Datasheet - Page 8

• 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
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
Package Thermal Resistance
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
20
Characteristic
40
1-layer PCB, Package LT
and
(R
V+
θJA
1-layer PCB, Package UA
(R
60
= 180 ºC/W)
θJA
Power Derating Curve
2-layer PCB, Package LT
Hysteresis of ΔV
Switching Due to ΔB
Output voltage in relation to impinging magnetic flux density in a south polarity magnetic
field of sufficient strength. Transition through B
(R
= 165 ºC/W)
θJA
80
= 78 ºC/W)
T
A3250
A
B
100
(ºC)
HYS
120
OUT
Symbol
140
R
θJA
B+
V
V
160
Field-Programmable, Chopper-Stabilized,
OUT(off)
OUT(on)(sat)
Hysteresis Curves
Package UA, 1-layer PCB with copper limited to solder pads
Package LT, 1-layer PCB with copper limited to solder pads
Package LT, 2-layer PCB with 0.94 in
180
V
V
CC(min)
CC(max)
OP
must precede transition through B
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
Unipolar Hall-Effect Switches
900
800
700
600
500
400
300
200
100
Test Conditions
0
20
40
V+
2
60
copper each side
Switching Due to ΔB
Hysteresis of ΔV
Power Dissipation
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Temperature (°C)
80
A3251
B
HYS
100
RP
.
120
OUT
B+
140
Value
165
180
78
V
V
OUT(off)
OUT(on)(sat)
160
Units
ºC/W
ºC/W
ºC/W
180
7