Two-Wire, Zero Speed
Differential Gear Tooth Sensor IC
ATS685LSH
3
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
OPERATING CHARACTERISTICS V
CC
and T
A
within specification, unless otherwise noted
Characteristics
Symbol
Test Conditions
Min. Typ.
1
Max. Unit
2
Electrical Characteristics
Supply Voltage
3
V
CC
Operating, T
J
< T
J
(max), I
CC
within specification 4.0
24
V
Undervoltage Lockout
V
CC(UV)
V
CC
0 ?5 V or 5 ?0 V
3.5 3.95
V
Reverse Supply Current
4
I
RCC
V
CC
= 18 V
10 mA
Supply Zener Clamp Voltage
V
Z
I
CC
= I
CC
(max) + 3 mA, T
A
= 25癈
28
V
Supply Zener Current
I
Z
T
A
= 25癈, V
CC
= 28 V
19
mA
Supply Current
I
CC(Low)
Low-current state
4
6
8
mA
I
CC(High)
High-current state
12
14
16
mA
Supply Current Ratio
I
CC(High)
/
I
CC(Low)
Ratio of high current to low current
1.85
3.05
Test Pin Zener Clamp Voltage
5
V
ZTEST
6
V
Power-On State Characteristics
Power-On Time
6
t
PO
V
CC
> V
CC
(min), f
OP
< 100 Hz
1
2
ms
Power-On State
7
POS t > t
PO
I
CC(High)
A
Output Stage
Output Slew Rate
8,9
di / dt
攊 / 攖 from 90% to 10% I
CC
level
R
SENSE
= 100 ? C
LOAD
= 10 pF, no C
BYPASS
7
14
mA/約
Performance Characteristics
Operating Frequency
f
OP
0
12
kHz
Analog Signal Bandwidth
BW
16
20
kHz
Operate Point
B
OP
% of peak-to-peak B
SIG
, AG
OP
within
specification
70
%
Release Point
B
RP
% of peak-to-peak B
SIG
, AG
OP
within
specification
30
%
Running Mode Lockout Enable
Threshold
V
LOE(RM)
At peak-to-peak V
PROC
< V
LOE(RM)
,
output
switching disables
170
mV
Running Mode Lockout Release
Threshold
V
LOR(RM)
At peak-to-peak V
PROC
> V
LOR(RM)
, output
switching enables
200
mV
Calibration
Start Mode Hysteresis
PO
HYS
V
LOR(RM)
mV
Initial Calibration
10
CAL
I
Rising output (current) edges, f
OP
< 200 Hz
3 edges
Continued on the next page&
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