Self-Calibrating, Zero-Speed Differential
Gear Tooth Sensor IC with Continuous Update
ATS643LSH
8
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
Characteristic
Symbol
Test Conditions
Min. Typ. Max Units
Package Thermal Resistance
R
窲A
Minimum-K PCB (single-sided with copper limited to
solder pads)
126 篊/W
Low-K PCB (single-sided with copper limited to solder
pads and 3.57 in.
2
(23.03 cm
2
) of copper area)
84 篊/W
6
7
8
9
2
3
4
5
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
20 40 60 80 100 120 140 160 180
T
J(max)
= 165篊; I
CC
= I
CC(max)
Power Derating Curve
(R
窲A
= 126 篊/W)
Minimum-K PCB
(R
窲A
= 84 篊/W)
Low-K PCB
V
CC(min)
V
CC(max)
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
20 40 60 80 100 120 140 160 180
Temperature (癈)
T
J(max)
= 165篊; V
CC
= V
CC(max)
;
I
CC
= I
CC(max)
Maximum Power Dissipation, P
D(max)
(
R
?/DIV>
J
A
=
1
2
6
?/DIV>
C
/
W
)
M
i
n
i
m
u
m
-
K
P
C
B
(
R
?/DIV>
J
A
=
8
4
?/DIV>
C
/
W
)
L
o
w
-
K
P
C
B
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