Tooth frequency, target generating sinusoidal signal
Corresponds to output switching frequency – 3 dB
ATS673 % of peak-to-peak, referenced to tooth signal,
ATS674 AG < AG
(Max)
ATS673 % of peak-to-peak, referenced to tooth signal,
ATS674 AG < AG
(Max)
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,
gear speed = 1000 rpm, target eccentricity
ATS674 < 0.1 mm
ATS673 Rising edges; after initial calibration, gear speed
ATS674 = 1000 rpm, target eccentricity < 0.1 mm
ATS673 Falling edges; after initial calibration, gear speed
ATS674 = 1000 rpm, target eccentricity < 0.1 mm
After initial calibration, AG = 1.5 mm, T
A
= 25°C
25°C.
Min.
0
–
–
–
–
–
Typ.
1
–
40
40
30
50
40
Max.
8
–
–
–
–
–
Units
kHz
kHz
%
%
%
%
SWITCHPOINT CHARACTERISTICS
CALIBRATION CHARACTERISTICS
4
Initial Calibration
AGC Disable
Calibration Update
Cal
IC
Cal
AGC
Cal
UPD
AG
TPOS
AG
AG
EXTMIN
AG
EXTMAX
Err
ICREL
–
–
–
–
–
Contin-
uous
–
–
–
–
3
3
0.5
0.4
0.8
0.6
1.6 x 10
–4
3
3
–
edges
edges
edges
PERFORMANCE CHARACTERISTICS
3
TPOS Air Gap Range
5
Operational Air Gap Range
Extended Minimum Air Gap
6
Extended Maximum Air Gap
7
0.5
0.5
–
2.5
–
–
–
–
–
–
–
2.5
2.5
0.5
5
6
6
0.8
0.8
1.2
1.2
–
mm
mm
mm
mm
deg
deg
deg
deg
deg
deg
deg/rpm
Relative Timing Accuracy
4,8
Err
RELR
Err
RELF
Phase Delay
9
1
Typical
∆Err
SREL
values are taken at V
CC
= 12 V and T
A
=
2
I
ZSupply(Max)
is equivalent to I
CCON(Max)
+ 3 mA.
3
Using reference target 8X.
4
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.
Falling edge: from tooth to approaching valley.
5
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
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
The Extended Minimum Air Gap is a range of installation air gaps, smaller than AG
(Min)
, within which the the device will accurately detect target fea-
tures but TPOS is NOT guaranteed to be fully accurate, possibly evaluating the initial valley as a tooth.
7
The Extended Maximum Air Gap is an extended range of installation air gaps, greater than AG
(Max)
, within which the the device will accurately detect
target features but TPOS is not guaranteed to be fully accurate, possibly evaluating the intiial tooth as a valley.
8
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
Gap Range, AG, and Operating Ambient Temperature, T
A
, range.
9
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-
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