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True Zero-Speed, High Accuracy Gear Tooth Sensor IC 
ATS667LSG
3
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
OPERATING CHARACTERISTICS Valid over operating voltage and temperature ranges; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.   Typ.
1
Max.    Unit
Electrical Characteristics
Supply Voltage
2
V
CC
Operating, T
J
 < T
J
(max)
4.0
     24
V
Undervoltage Lockout (UVLO)
V
CC(UV)

3.5    3.95
V
Reverse Supply Current
I
RCC
V
CC
 = 18 V

      10    mA
Supply Zener Clamp Voltage
V
Z
I
CC
 = 15 mA, T
A
 = 25 癈
26.5    

V
Supply Zener Current
I
Z
T
A
 = 25癈, T
J
 < T
J
(max), continuous, V
Z
 = 26.5 V   
     15
mA
Supply Current
I
CC
Output off
4
7
12
mA
Output on
4
7
12
mA
Power-On State Characteristics
Power-On State
POS   Connected as in figure 6
     High    

Power-On Time
3
t
PO
S
ROT
 < 200 rpm; V
CC
 > V
CC
(min)


2
ms
OUTPUT STAGE
Low Output Voltage
V
OUT(SAT)
I
OUT
 = 10 mA, Output = on
     100    250    mV
Output Zener Clamp Voltage
V
ZOUT
I
OUT
 = 3 mA, T
A
 = 25癈
26.5    

V
Output Current Limit
I
OUT(LIM)
V
OUT
 = 12 V, T
J
 < T
J
(max)
25    45    70
mA
Output Leakage Current
I
OUT(OFF)
Output = off, V
OUT
 = 24 V

     10
糀
Output Rise Time
t
r
R
PULLUP
 = 1 k? C
L
 = 4.7 nF, V
PULLUP
 = 12 V,
10% to 90%, connected as in figure 6
      10

約
Output Fall Time
t
f
R
PULLUP
 = 1 k? C
L
 = 4.7 nF, V
PULLUP
 = 12 V,
90% to 10%, connected as in figure 6
     0.6
2
約
D-to- A Converter (DAC) Characteristics
Allowable User Induced Differential
Offset
4,5
B
DIFFEXT
User induced differential offset
     ?0    
G
Calibration
Initial Calibration
6
CAL
I
Possible reduced edge detection accuracy, duty
cycle not guaranteed

1
6    edge
Update Method
Running mode operation, bounded for
increasing AG, unlimited for decreasing AG
    Continuous   

Operating Characteristics (with Allegro 60-0 Reference Target)
Operational Air Gap Range
7
AG
OP
Repeatability and duty cycle within specification   0.5
     2.5    mm
Maximum Operational Air Gap Range   AG
OPMAX
Output switching only (no missing edges)

     3.1    mm
Relative Repeatability
8
T
窫
100 G
pk-pk
 ideal sinusoidal signal, T
A
 = 150癈,
S
ROT
 = 1000 rpm (f = 1000 Hz)
     0.06         deg.
Maximum Single Outward Sudden Air
Gap Change
9
擜G
MAX
Percentage of most recent AG
pk-pk
, single
instantaneous air gap increase, f < 500 Hz,
V
PROC(pk-pk)
 > V
LOE
 after sudden AG change
     40

%
Duty Cycle
D
Measured as V
OUT
, connected as in figure 6;
Wobble < 0.5 mm, AG
OP
 < AG
OP
(max) , direction
of target rotation pin 4 to pin 1
42    47    52
%
Continued on the next page&
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