Self-Calibrating TPOS Gear Tooth Sensor ICs
Optimized for Automotive Cam Sensing Applications
ATS673 and
ATS674
3
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
OPERATING CHARACTERISTICS Valid at T
A
= 40癈 to 150癈, T
J
d T
J(max)
, over full range of AG, unless otherwise noted
Characteristic
Symbol
Test Conditions
Min. Typ.
1
Max. Units
Continued on the next page...
ELECTRICAL CHARACTERISTICS
Supply Voltage
V
CC
Operating; T
J
< T
J(Max)
3.3
26.5 V
Undervoltage Lockout
V
CCUV
CC(Min)
V
Supply Zener Clamp Voltage V
ZSupply
I
CC
= I
CC(Max)
+ 3 mA, T
A
= 25癈
28 31 35
V
Supply Zener Current
2
I
ZSupply
V
Supply
= 27 V
14 mA
Supply Current
I
CC
Output = OFF or ON
3
6.5 11 mA
Reverse Supply Current
I
RCC
V
RCC
= 18 V
5 10 mA
POWER-ON CHARACTERISTICS
Power-On Time
3
t
PO
Gear Speed < 100 rpm; V
CC
> V
CC(Min)
500 ms
OUTPUT CHARACTERISTICS
Low Output Voltage
V
OUT(Sat)
I
SINK
= 15 mA, Output = ON
200 450 mV
Output Zener Voltage
V
ZOUT
I
OUT
= 3 mA, T
A
= 25癈
30
V
Output Current Limit
I
OUTLIM
Output = ON, V
OUT
= 12 V
35 57 90 mA
Output Leakage Current
I
OUTOFF
Output = OFF, V
OUT
= V
CC(Max)
10 mA
Output Rise Time
t
r
10/90% points; R
LOAD
= 500 W, C
LOAD
= 10 pF, T
A
= 25癈
0.9
5
ms
Output Fall Time
t
f
10/90% points; R
LOAD
= 500 W, C
LOAD
= 10 pF, T
A
= 25癈
0.5
5
ms
Output Polarity
V
OUT
HT device option
Over tooth
HIGH
V
Over valley
LOW
V
LT device option
Over tooth
LOW
V
Over valley
HIGH
V
t+
100
Output Rise and Fall Time
0
t
r
90
10
t
f
V
OUT(High)
V
OUT(Low)
V+
%
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