ats643 Allegro MicroSystems, Inc., ats643 Datasheet - Page 4

• Manufacturer Part Number: ats643
• Description: Ats643lsh Self-calibrating Zero-speed Differential Gear Tooth Sensors With Continuous Update
• Manufacturer: Allegro MicroSystems, Inc.

ATS643LSH
OPERATING CHARACTERISTICS (continued) using reference target 60-0, T
SWITCHPOINT CHARACTERISTICS
Rotation Speed
Bandwidth
Operate Point
Release Point
CALIBRATION
Initial Calibration Period
AGC Calibration Disable
Start Mode Hysteresis
DAC CHARACTERISTICS
Dynamic Offset Cancellation
Tracking Data Resolution
FUNCTIONAL CHARACTERISTICS
Air Gap Range
Maximum Operable Air Gap
Duty Cycle Variation
Input Signal Range
Minimum Operable Input Signal
1
2
of the bypass capacitor, if one is used.
3
4
characterized. The field available from the reference target is given in the reference target parameter section of the datasheet.
Power-On Time includes the time required to complete the internal automatic offset adjust. The DACs are then ready for peak acquisition.
dI is the difference between 10% of I
Continuous Update (calibration) functions continuously during Running mode operation.
AG is dependent on the available magnetic field. The available field is dependent on target geometry and material, and should be independently
Characteristic
4
3
CC(Low)
AG
Sig
Symbol
PO
S
ΔDC
B
BW
B
AG
Sig
(opmax)
(opmin)
C
C
ROT
and 90% of I
OP
RP
HYS
I
f
Gear Tooth Sensor with Continuous Update
Reference Target 60-0
Equivalent to f – 3dB
Quantity of rising output (current) edges required for
accurate edge detection
Quantity of rising output (current) edges used for
calibrating AGC
Quantity of bits available for PDAC/NDAC tracking of
both positive and negative signal peaks
ΔDC within specification
Output switching (no missed edges); ΔDC not
guaranteed
Wobble < 0.5 mm, AG within specification
ΔDC within specification
Output switching (no missed edges); ΔDC not
guaranteed
% of peak to peak referenced from PDAC to NDAC,
AG < AG
% of peak to peak referenced from PDAC to NDAC,
AG < AG
CC(High)
Self-Calibrating, Zero-Speed Differential
, and dt is time period between those two points. Note: dI/dt is dependent upon the value
MAX
MAX
Test Conditions
A
and V
CC
within specification, unless otherwise noted
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Min.
0.5
25
40
30
0
–
–
–
–
–
–
–
–
–
Typ.
175
±60
40
65
35
–
–
–
–
–
–
9
–
–
12,000
Max.
1400
2.75
±10
2.5
–
–
–
3
3
–
–
–
–
Units
Edge
Edge
rpm
kHz
mm
mm
mV
Bit
%
%
%
G
G
G
4