Self-Calibrating TPOS Gear Tooth Sensor ICs
Optimized for Automotive Cam Sensing Applications
ATS673 and
ATS674
2
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
performance independent of air gap and also to dynamically adapt
device performance to the typical operating conditions found in
automotive applications, particularly cam sensing applications
(reduced vibration sensitivity).
High-resolution (9-bit) peak detecting DACs are used to set the
adaptive switching thresholds of the devices, ensuring high accuracy
even in the presence of gear eccentricity. Hysteresis in the thresholds
reduces the negative effects of anomalies in the magnetic signal
(such as magnetic overshoot) associated with the targets used in
many automotive applications. The ATS673 and 674 also include
a low bandwidth filter that increases the noise immunity and the
signal to noise ratio of the IC.
Two options are available for output polarity, low over tooth (LT)
and high over tooth (HT). For applications requiring absolute
accuracy use the ATS674. The ATS673 should be used for targets
with high wobble.
? AGC and reference adjust circuit
? Undervoltage lockout
Features and Benefits (continued)
Description (continued)
Absolute Maximum Ratings
Characteristic
Symbol
Notes
Rating Units
Supply Voltage
V
CC
28
V
Reverse-Supply Voltage
V
RCC
18
V
Continuous Output Current
I
OUT
20
mA
Reverse Output Current
I
ROUT
50
mA
Operating Ambient Temperature
T
A
Range L
40 to 150 篊
Maximum Junction Temperature
T
J
(max)
165
篊
Storage Temperature
T
stg
65 to 170 篊
Terminal List
Name
Description
Number
VCC
Connects power supply to chip
1
VOUT
Device output
2
TEST
For Allegro use, float or tie to GND
3
GND
Ground terminal
4
2 4
3
1
Pin-out Diagram
Selection Guide
Part Number V
OUT
(Over Tooth)
Application
Packing
*
ATS673LSETN-LT-T
Low
High target wobble
13-in. reel, 450 pieces/reel
ATS673LSETN-HT-T
High
ATS674LSETN-LT-T
Low
High absolute edge detection accuracy
ATS674LSETN-HT-T
High
*
Contact Allegro for additional packing options.
发布紧急采购，3分钟左右您将得到回复。
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