True Zero Speed Miniature Differential Peak-
Detecting Gear Tooth Sensor IC
ATS645LSH
3
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
OPERATING CHARACTERISTICS using reference target 60-0, T
A
and V
CC
within speci cation, unless otherwise noted
CHARACTERISTIC
Symbol
Test Conditions
Min. Typ.
1
Max. Units
ELECTRICAL CHARACTERISTICS
Supply Voltage
2
V
CC
Operating; T
J
< 165 癈
4.0
24
V
Undervoltage Lockout
V
CC(UV)
V
CC
0 ?5 V and 5 ?0 V
4.0
V
Supply Zener Clamp Voltage V
Z
I
CC
= I
CC(max)
+ 3 mA; T
A
= 25?/SPAN>C
28
V
Supply Zener Current
I
Z
Test conditions only; V
Z
= 28 V
I
CC(max)
+
3 mA
mA
Supply Current
I
CC(Low)
ATS645LSH-I1
4.0
6
8.0 mA
ATS645LSH-I2
5.9
7
8.4 mA
I
CC(High)
ATS645LSH-I1
12.0 14.0 16.0 mA
ATS645LSH-I2
11.8 14.0 16.8 mA
Supply Current Ratio
I
CC(High)
/
I
CC(Low)
Ratio of high current to low current
1.85 3.05
POWER-ON STATE CHARACTERISTICS
Power-On State
POS t > t
PO
I
CC(High)
Power-On Time
3
t
PO
Target gear speed < 100 rpm
1
2
ms
OUTPUT STAGE
Output Slew Rate
4
dI/dt R
LOAD
= 100 ? C
LOAD
= 10 pF
10
mA/約
Continued on the next page.