ATS674LSETN-LT Allegro Microsystems Inc, ATS674LSETN-LT Datasheet - Page 5

• Manufacturer Part Number: ATS674LSETN-LT
• Description: IC SENSOR GEAR TOOTH 4LEAD
• Manufacturer: Allegro Microsystems Inc
• Type: Special Purposer

Specifications of ATS674LSETN-LT

• Sensing Range: 30% of Air Gap Trip, 40% of Air Gap Release
• Voltage - Supply: 3.3 V ~ 26.5 V
• Current - Supply: 11mA
• Current - Output (max): 20mA
• Output Type: Digital, Open Collector
• Features: Gear Tooth Type
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 4-SIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ATS673 and
ATS674
OPERATING CHARACTERISTICS, continued
SWITCHPOINT CHARACTERISTICS
Tooth Speed
Bandwidth
Operate
Release
CALIBRATION CHARACTERISTICS
Initial Calibration
AGC Disable
Calibration Update
PERFORMANCE CHARACTERISTICS
TPOS Air Gap Range
Operational Air Gap Range
Extended Minimum Air Gap
Extended Maximum Air Gap
Relative Timing Accuracy
Phase Delay
1
2
3
4
Falling edge: from tooth to approaching valley.
5
a tooth when powered-on over a tooth and correctly detecting a valley when powered-on over a valley, using reference target 8X or equivalent, as
specified in the Target/Gear Parameters for Correct TPOS Operation section in this document.
6
tures but TPOS is NOT guaranteed to be fully accurate, possibly evaluating the initial valley as a tooth.
7
target features but TPOS is not guaranteed to be fully accurate, possibly evaluating the intiial tooth as a valley.
8
Gap Range, AG, and Operating Ambient Temperature, T
9
ent temperature, T
Typical values are taken at V
I
Using reference target 8X.
The term edge refers to a mechanical edge, such as the side of a gear tooth, passing under the device. Rising edge: from valley to approaching tooth.
The TPOS Air Gap Range is the range of installation air gaps within which the TPOS (True Power-On State) function is guaranteed to correctly detect
The Extended Minimum Air Gap is a range of installation air gaps, smaller than AG
The Extended Maximum Air Gap is an extended range of installation air gaps, greater than AG
Relative Timing Accuracy is the change in edge position before the resulting change in device output; for a single device, over the full Operational Air
Phase Delay is the change in edge position at detection, through the full operational Tooth Speed, S, range for a single device, and at a single ambi-
ZSupply(Max)
Characteristic
is equivalent to I
9
A
, and installation air gap, AG.
5
4,8
6
7
CCON(Max)
CC
= 12 V and T
AG
AG
Symbol
Err
AG
Err
Err
Err
Cal
Cal
Cal
B
B
4
EXTMAX
BW
AG
EXTMIN
Optimized for Automotive Cam Sensing Applications
ICREL
S
TPOS
RELR
RELF
+ 3 mA.
OP
RP
AGC
UPD
SREL
3
IC
A
Tooth frequency, target generating sinusoidal signal
Corresponds to output switching frequency – 3 dB
ATS673 % of peak-to-peak, referenced to tooth signal,
ATS674
ATS673 % of peak-to-peak, referenced to tooth signal,
ATS674
Quantity of rising edges required to complete edge detec-
tion calibration
Quantity of rising edges required to complete Automatic
Gain Control calibration
Quantity of rising edges required to update edge detection
calibration while running after initial calibration
TPOS functionality guaranteed
TPOS guaranteed, output switching, running mode
Output switching, running mode; valleys may be detected
as teeth in this range
Output switching, running mode; teeth may be detected as
valleys in this range
ATS673 During initial calibration; rising or falling edges,
ATS674
ATS673 Rising edges; after initial calibration, gear speed
ATS674
ATS673 Falling edges; after initial calibration, gear speed
ATS674
After initial calibration, AG = 1.5 mm, T
= 25°C.
Self-Calibrating TPOS Gear Tooth Sensor ICs
A
AG < AG
AG < AG
gear speed = 1000 rpm, target eccentricity
< 0.1 mm
= 1000 rpm, target eccentricity < 0.1 mm
= 1000 rpm, target eccentricity < 0.1 mm
, range.
Valid at T
(Max)
(Max)
Test Conditions
A
= –40°C to 150°C, T
(Min)
A
= 25°C
, within which the the device will accurately detect target fea-
J
≤ T
(Max)
J(max)
, within which the the device will accurately detect
, over full range of AG, unless otherwise noted
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Min.
0.5
0.5
2.5
0
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
1.6 x 10
Contin-
Typ.
uous
0.5
0.4
0.8
0.6
40
40
30
50
40
–
–
–
–
–
–
–
3
3
1
–4
Max.
2.5
2.5
0.5
0.8
0.8
1.2
1.2
8
–
–
–
–
–
3
3
–
5
6
6
–
deg/rpm
edges
edges
edges
Units
kHz
kHz
mm
mm
mm
mm
deg
deg
deg
deg
deg
deg
%
%
%
%
4