ATS19580LSNBTN-FDWHPO [ALLEGRO]
Direction Sensor IC for Gear Tooth Sensing;
| 型号： | ATS19580LSNBTN-FDWHPO |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | Direction Sensor IC for Gear Tooth Sensing |
| 文件： | 总16页 (文件大小：1013K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ATS19580
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
FEATURES AND BENEFITS
DESCRIPTION
• Fully integrated solution has GMR IC, protection
capacitor, and back-bias magnet in a single in-line
overmolded package
• Innovative GMR technology provides large operational
air gap sensing on ferromagnetic targets
• Advanced algorithms for flexible design-in and system
compensation
TheATS19580 is a giant magnetoresistance (GMR) integrated
circuit (IC) that provides a user-friendly two-wire solution for
applicationswherespeedanddirectioninformationisrequired
using ferromagnetic gear tooth targets. The fully integrated
package includes the GMR IC, a protection capacitor for EMC
robustness, and a back-bias magnet in a single in-line package.
The GMR-based IC is designed for use with ferromagnetic
gear tooth targets and is orientation-compatible with Hall-
effect technology. The fully integrated solution senses at large
operating air gaps and over a large air gap range. State-of-the-
art GMR technology on a monolithic IC with industry-leading
signal processing provides accurate speed and direction
information in response to low-level differential magnetic
signals. The differential sensing offers inherent rejection of
interfering common-mode magnetic fields.
□ Advanced vibration algorithms guarantee valid
direction information
□ Automatically adapts to extreme mechanical changes
(air gap) and thermal drifts
• Measures differentially to reject common-mode stray
magnetic fields
• Orientation compatible with Hall-effect technology
• Integrated ASIL diagnostics and certified safety design
process (optional fault reporting)
IntegrateddiagnosticsareusedtodetectanICfailurethatwould
impactoutputprotocolaccuracy,providingcoveragecompatible
withASILB(assessmentpending). Built-inEEPROMscratch
memory offers traceability of the device throughout the IC’s
product lifecycle. ASIL reporting can be enabled or disabled
as a product offering depending on the applications’ needs.
2
-
PACKAGE: 3-pin SIP (suffix SN)
The ATS19580 is provided in a lead (Pb) free 3-pin SIP
package with tin leadframe plating. The SN package includes
a GMR IC, a magnet, and capacitor integrated into a single
overmold, with an additional molded lead-stabilizing bar for
robust shipping and ease of assembly.
Not to scale
VCC
+
ADC
GMR
Elements
Output
-
Current
ESD
Generator
Analog-to-Digital
and
Signal Conditioning
Digital
Controller
Front End
Amplification
+
-
ADC
GND
Regulator
Oscillator
EEPROM
Diagnostics
Functional Block Diagram
ATS19580-DS, Rev. 2
MCO-0000925
November 18, 2020
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
SELECTION GUIDE*
Part Number
Packing
Fault Detection Mode
Enabled
ATS19580LSNBTN-FSNHPO-A
ATS19580LSNBTN-RSNHPO-A
Tape and reel, 13-in. reel, 800 pieces per reel
Tape and reel, 13-in. reel, 800 pieces per reel
Enabled
* Not all combinations are available. Contact Allegro sales for availability and pricing of custom programming options.
Configuraꢀon Opꢀons
ATS19580
L
SN
TN
-
Fault Detecꢀon Mode
A – ASIL Protocol Enabled
[Blank] – ASIL Protocol Disabled
Calibraꢀon Mode Non-Direcꢀon Pulses
O – Blanked, no output during calibraꢀon
Y – Pulses allowed during calibraꢀon
Running Mode Non-Direcꢀon Pulses
B – Blanked, no output during Running mode
P – Pulses allowed during Running mode
Vibraꢀon Immunity
H – High vibraꢀon immunity (recommended)
L – Low vibraꢀon immunity with immediate direcꢀon change detecꢀon
Pulse Widths (Typical)
I – Intermediate, Forward = 60 µs, Reverse = 120 µs, Non-Direcꢀon = 30 µs
N – Narrow, Forward = 45 µs, Reverse = 90 µs, Non-Direcꢀon = 180 µs
W – Wide, Forward = 45 µs, Reverse = 180 µs, Non-Direcꢀon = 360 µs
Number of Pulses
S – Single, one pulse per tooth-valley pair
D –Dual, two pulses per tooth-valley pair
Forward Rotaꢀon Direcꢀon
F – pin 1 to pin 3
R – pin 3 to pin 1
Packing Type
Internal Capacitor
B – 10 nF capacitor
L – 22 nF capacitor
Package Designaꢀon
Operaꢀng Temperature Range
Allegro Idenꢀfier and Device Type
2
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
VCC
Notes
Refer to Power Derating section
Rating
28
Units
V
Supply Voltage
Reverse Supply Voltage
VRCC
TA
–18
V
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Range L
–40 to 150
165
°C
°C
°C
G
TJ(max)
Tstg
–65 to 170
500
Externally Applied Magnetic Flux Density
B
In any direction
PINOUT DIAGRAM AND LIST
Pinout List
Branded
Face of IC
Number
Name
VCC
VCC
GND
Function
1
2
3
Supply Voltage
Supply Voltage
Ground
1
ꢀ
3
Package SN, 3-Pin SIP Pinout Diagram
Internal Components
Characteristic
Symbol
Notes
Rating
10
Units
nF
B
L
Connected between VCC and GND; refer to
Figure 1
Nominal Capacitance
CSUPPLY
22
nF
VCC
VCC
1
ATS19580
IC
3 GND
RL
VOUT = ICC × RL
CL
Figure 1: Typical Application Circuit
3
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
OPERATING CHARACTERISTICS: Valid throughout full operating and temperature ranges, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
ELECTRICAL SUPPLY CHARACTERISTICS
Voltage across pin 1 and pin 3; does not include
voltage across RL
Supply Voltage [2]
VCC
4
–
24
V
Undervoltage Lockout
VCC(UV)
IRCC
–
–
–
–
–
3.95
–
V
Reverse Supply Current [3]
VCC = –18 V
–10
5.9
12
mA
mA
mA
ICC(LOW) Low-current state
ICC(HIGH) High-current state
8
Supply Current
16
ICC(HIGH)
ICC(LOW)
/
Supply Current Ratio
ASIL Safety Current
Ratio of high current to low current (isothermal)
1.9
1.5
–
–
–
–
IFAULT
VCC ≤ 14 V, -A (ASIL) variant
3.9
mA
ELECTRICAL PROTECTION CHARACTERISTICS
Supply Zener Clamp Voltage VZsupply ICC = 19 mA
28
–
–
–
–
V
V
Reverse Supply Zener Clamp Voltage VRZSUPPLY ICC = –3 mA
–18
POWER-ON STATE CHARACTERISTICS
Power-On State
POS
tPO
VCC > VCC(min)
ICC(LOW)
–
–
Time from VCC > VCC(min), until device has
entered Calibration mode
Power-On Time [4]
–
1
ms
OUTPUT CHARACTERISTICS
Capacitor
L variant
Voltage measured at pin 3
(see Figure 1),
RL = 100 Ω, CL = 10 pF, measured
between 10% and 90% of signal
0
0
0
0
4.5
2
8.8
4
μs
μs
μs
μs
Output Rise Time
Output Fall Time
tr
Capacitor
B variant
Capacitor
L variant
Voltage measured at pin 3
(see Figure 1),
RL = 100 Ω, CL = 10 pF, measured
between 10% and 90% of signal
4.5
2
8.8
4
tr
Capacitor
B variant
RL = 100 Ω, CL = 10 pF, pulse
tw(FAULT) duration measured at threshold of
(ICC(LOW) + IFAULT) / 2
-A (ASIL)
variant
Pulse Width, Fault
4
–
8
ms
Continued on next page...
4
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
OPERATING CHARACTERISTICS (continued): Valid throughout full operating and temperature ranges,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
NARROW PULSE WIDTH OPTION (-xSNxxx variants) [5]
Pulse Width, Forward Rotation
tw(FWD)
tw(REV)
tw(ND)
fFWD
38
76
153
0
45
90
180
–
52
104
207
12
7
μs
μs
Pulse Width, Reverse Rotation
Pulse Width, Non-Direction
μs
Operating Frequency, Forward Rotation
Operating Frequency, Reverse Rotation [6]
Operating Frequency, Non-Direction Pulses [6]
kHz
kHz
kHz
fREV
0
–
fND
0
–
4
WIDE PULSE WIDTH OPTION (-xSWxxx variants) [5]
Pulse Width, Forward Rotation
tw(FWD)
tw(REV)
tw(ND)
fFWD
38
153
306
0
45
180
360
–
52
207
414
12
μs
μs
Pulse Width, Reverse Rotation
Pulse Width, Non-Direction
μs
Operating Frequency, Forward Rotation
Operating Frequency, Reverse Rotation [6]
Operating Frequency, Non-Direction Pulses [6]
kHz
kHz
kHz
fREV
0
–
4
fND
0
–
2.2
[5][7]
INTERMEDIATE PULSE WIDTH OPTION (-xSIxxx variants)
Threshold to Enter High-Speed Mode
Threshold to Exit High-Speed Mode
Pulse Pre-Low Length
fHIGH
fLOW
Increasing TCYCLE frequency
Decreasing TCYCLE frequency
0.935
0.85
25
1.1
1
1.265
1.15
35
kHz
kHz
µs
tW(PRE)
30
60
120
30
30
Pulse Width, Forward Rotation
Pulse Width, Reverse Rotation
Pulse Width, Non-Direction
tW(FWD) TCYCLE frequency < fLOW
tW(REV) TCYCLE frequency < fLOW
tW(ND)
51
69
µs
102
25
138
35
µs
µs
Pulse Width, High Speed
tW(HS)
fFWD
fREV
fND
TCYCLE frequency > fHIGH
25
35
µs
Direction information is not available when
frequency > fHIGH
Operating Frequency, Forward Rotation
Operating Frequency, Reverse Rotation
Operating Frequency, Non-Direction Pulses
0
0
0
–
–
–
12
12
12
kHz
kHz
kHz
Direction information is not available when
frequency > fHIGH
Direction information is not available when
frequency > fHIGH
Continued on next page...
5
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
OPERATING CHARACTERISTICS (continued): Valid throughout full operating and temperature ranges,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
Operational Air Gap Range [8]
AG
Using Reference Target 60-0, tested at 1000 rpm
1.5
–
4.5
mm
Percentage of IC processed magnetic signals;
see Figure 3
Operate Point
Release Point
BOP
BRP
–
–
70
30
–
–
%
%
Percentage of IC processed magnetic signals;
see Figure 3
PERFORMANCE CHARACTERISTICS
Amount of target rotation (constant direction) after
tPO to first valid speed and direction output;
see Figure 2
Initial Calibration
TCAL
–
3
4
TCYCLE
Vibration Immunity (Startup)
Refer to Functional Description section
Refer to Functional Description section
1
1
–
–
–
–
TCYCLE
TCYCLE
Vibration Immunity (Running Mode)
Using Reference Target 60-0 [9]
correct output sequence
,
Tooth-to-Tooth Variation over 1 TCYCLE
Total Air Gap Variation During Operation
–
0.25
–
–
3
mm
mm
Momentary interruptions in output sequence
permitted; operation within AG range
–3
THERMAL CHARACTERISTICS
Package Thermal Resistance [10]
RθJA
Single-layer PCB with copper limited to solder pads
–
150
–
°C/W
[1] Typical values are at VCC = 5 V and TA = 25°C, unless otherwise specified. Performance may vary for individual units, within the maximum and minimum limits.
[2] Maximum voltage must be adjusted for power dissipation and junction temperature; see Power Derating section.
[3] Negative current is defined as conventional current coming out of (sourced from) the specified device terminal.
[4] Output transients prior to tPO should be ignored.
[5] RL = 100 Ω and CL = 10 pF. Pulse duration measured at threshold of (ICC(HIGH) + ICC(LOW)) / 2.
[6] Maximum Operating Frequency is determined by satisfactory separation of output pulses. If shorter low-state durations can be resolved, the maximum fREV and fND may
be higher.
[7] Direction information is not available in High-Speed mode with Intermediate Pulse Width variant.
[8] Operating air gap is dependent on the available magnetic field. The available field is target geometry and material dependent and should be independently characterized.
[9] To determine IC’s tolerance to air gap variations on other targets, the complete magnetic system must be analyzed. Due to the nature of the GMR system, contact Allegro
for assistance in assessing other targets for use with ATS19580.
[10] Additional thermal information is available on the Allegro website.
Ferrous Target
Tooth
Valley
TCYCLE
BDIFF
Target Cycle; the amount of rotation that moves one tooth and
valley across the sensor.
TCYCLE
=
=
BDIFF
The differential magnetic flux density sensed by the sensor.
Figure 2: Definition of TCYCLE
6
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
REFERENCE TARGET 60-0 (60-TOOTH TARGET)
Characteristics
Outside Diameter
Symbol
Test Conditions
Typ.
Units
Symbol Key
D
h
t
Outside diameter of target
120
mm
o
Do
t
F
Breadth of tooth, with respect
to branded face
Face Width
F
t
6
3
3
mm
t
v
Length of tooth, with respect
to branded face
Circular Tooth Length
Circular Valley Width
degrees
degrees
Length of valley, with respect
to branded face
tv
Air Gap
Tooth Whole Depth
Material
ht
3
–
mm
–
Branded Face of Sensor
Low Carbon Steel
Branded Face
of Sensor
Reference
Target 60-0
7
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
CHARACTERISTIC PLOTS
Supply Current Low versus Temperature
Supply Current Low versus Supply Voltage
8.0
7.5
7.0
6.5
6.0
5.5
8.0
7.5
7.0
6.5
6.0
5.5
T (°C)
A
Vcc (V)
4
-40
12
25
24
150
0
5
10
15
20
25
-50
0
50
100
150
200
V
CC (V)
Ambient Temperature (˚C)
Supply Current High versus Temperature
Supply Current High versus Supply Voltage
16.0
16.0
15.5
15.0
14.5
14.0
13.5
13.0
12.5
12.0
15.5
15.0
14.5
14.0
13.5
13.0
12.5
12.0
TA (°C)
Vcc (V)
4
-40
12
24
25
150
0
5
10
15
20
25
-50
0
50
100
150
V
CC (V)
Ambient Temperature (˚C)
Safety Current (Fault) versus Temperature
Safety Current (Fault) versus Supply Voltage
4.0
3.5
3.0
2.5
2.0
1.5
4.0
3.5
3.0
2.5
2.0
1.5
Vcc (V)
T (°C)
A
4
-40
25
12
24
150
0
5
10
15
20
25
-50
0
50
100
150
V
CC (V)
Ambient Temperature (˚C)
8
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
CHARACTERISTIC PLOTS (continued)
Pulse Width Forward versus Temperature
Pulse Width Reverse versus Temperature
52
50
48
46
44
42
40
38
104
100
96
92
88
84
80
76
-50
0
50
100
150
200
-50
0
50
100
150
Ambient Temperature (˚C)
Ambient Temperature (˚C)
Pulse Width Non-Direction versus Temperature
207
201
195
189
183
177
171
165
159
153
-50
0
50
100
150
Ambient Temperature (˚C)
9
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
FUNCTIONAL DESCRIPTION
Data Protocol Description
Sensing Technology
The sensor IC contains on-chip GMR elements that are used to
When a target passes in front of the device (opposite the branded
detect magnetic signals created by an adjacent target. These trans- face of the package case), the ATS19580 “S” variant generates
ducers provide electrical signals containing information regarding an output pulse for each tooth-valley pair of the target. Speed
edge position and direction of target rotation. The ATS19580 is
intended for use with ferromagnetic targets.
information is provided by the output pulse rate, while direction
of target rotation is provided by the duration of the output pulse.
The sensor IC can sense target movement in both the forward and
reverse direction.
After proper power is applied to the sensor IC, it is capable of
providing digital information that is representative of the fea-
tures of a rotating target. The waveform diagrams in Figure 3
present the automatic translation of the target profiles, through
their induced magnetic profiles, to the digital output signal of the
sensor IC.
VARIANTS
Figure 4 shows forward and reverse rotation for the “F” variant
of the sensor IC, where forward is defined as target motion from
pin 1 to 3. The sensor IC can also be factory-programmed for the
opposite definition (“R” variant), where forward is defined as
target motion from pin 3 to 1.
ꢇarget
Pacꢄage ꢅase
ꢀranded ꢆace
Pin 3
Pin 1
Device Orientation to Target
ꢂPin 1
Sideꢃ
ꢂꢇoꢈ ꢉiew oꢊ
Pacꢄage ꢅaseꢃ
ꢂPin 3
Sideꢃ
ꢌꢅ
ꢀacꢄ-ꢀiasing
Rare-ꢋarth Pellet
Panel A
Branded Face
of Package
Mechanical Position (Target moves past device pin 1 to pin 3)
Rotating Target
(Forward Rotation)
ꢇhis tooth
sensed earlier
ꢇhis tooth
sensed later
Target Magnetic Profile
ꢍꢀ
ꢅhannel
ꢋlement Pitch
Pin 3
Pin 1
Panel B
Branded Face
of Package
IC Internal Differential Analog Signals
ꢀꢁP
A ꢅhannel
Rotating Target
(Reverse Rotation)
ꢀRP
ꢀꢁP
ꢀ ꢅhannel
Figure 4: Target Rotation (“F” Variant Shown)
ꢀRP
Device Output Signal
Figure 3: Magnetic Profile
10
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
Target Design
Power-On (Calibration)
The ATS19580 is designed to work with a variety of target shapes After power is applied to the sensor IC, the IC internally detects
and sizes in addition to the Reference Target 60-0 in this data- the magnetic profile of the target. Operation begins with a
sheet. To determine the operating air gap range for each target, as calibration period, during which the sensor IC does not provide
well as the suitability for proper direction and vibration detection, direction information; direction pulses are provided once constant
the magnetic profile of each must be analyzed.
direction of rotation is determined. Depending on the selected
variant, non-directional pulses (tW(ND)) may or may not be pro-
vided during calibration.
ꢀarget Rotation
ꢀooth
ꢈalley
ꢀarget
ꢁiꢂꢂerential
Magnetic
Proꢂile
tꢃꢄꢅꢃꢁꢆ or
tꢃꢄRꢇꢈꢆ
tꢃꢄꢅꢃꢁꢆ or
tꢃꢄRꢇꢈꢆ
tꢃꢄꢅꢃꢁꢆ or
tꢃꢄRꢇꢈꢆ
tꢃꢄꢅꢃꢁꢆ or
tꢃꢄRꢇꢈꢆ
tꢃꢄNꢁꢆ
tꢃꢄNꢁꢆ
t
Figure 5: Output options after power-on
11
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
Vibration
where the first change in direction may be provided to the output
The IC has vibration detection ability, where vibration is defined
or may be suppressed. Options are also available such that non-
as multiple changes in target direction within the vibration immu- direction pulses may be provided during the vibration event until
nity specification. Two vibration output protocols are available,
constant target rotation is validated.
Normal ꢀarget Rotation
ꢃiꢄration
Normal ꢀarget Rotation
ꢀooth
ꢃalley
ꢀarget
ꢁiꢂꢂerential
Magnetic
Proꢂile
tꢅꢆꢇꢅꢁꢈ
tꢅꢆꢇꢅꢁꢈ
tꢅꢆꢇꢅꢁꢈ
tꢅꢆꢇꢅꢁꢈ
tꢅꢆRꢊꢃꢈ
ꢉ or tꢅꢆRꢊꢃꢈ
ꢋ
ꢋ
ꢉ or tꢅꢆRꢊꢃꢈ
ꢋ
ꢋ
ꢉ or tꢅꢆꢇꢅꢁꢈ
ꢋ
ꢉ or tꢅꢆRꢊꢃꢈ
ꢋ
ꢋ
ꢉ or tꢅꢆRꢊꢃꢈ
ꢋ
ꢋ
tꢅꢆꢇꢅꢁꢈ
tꢅꢆꢇꢅꢁꢈ
tꢅꢆꢇꢅꢁꢈ
tꢅꢆꢇꢅꢁꢈ
ꢉ or tꢅꢆRꢊꢃꢈ
ꢉ or tꢅꢆRꢊꢃꢈ
ꢉ or tꢅꢆRꢊꢃꢈ
ꢉ or tꢅꢆRꢊꢃꢈ
t
Figure 6: Vibration output protocol options
Normal ꢀarget Rotation
ꢃiꢄration
Normal ꢀarget Rotation
ꢀooth
ꢃalley
ꢀarget
ꢁiꢂꢂerential
Magnetic
Proꢂile
t
t
ꢅꢆNꢁꢇ
t
t
ꢅꢆꢈꢅꢁꢇ
t
t
t
t
t
ꢅꢆꢈꢅꢁꢇ
ꢅꢆꢈꢅꢁꢇ
ꢅꢆNꢁꢇ
ꢅꢆNꢁꢇ
ꢉ or t
ꢉ or t
ꢋ
ꢅꢆRꢊꢃꢇ
ꢉ or t
ꢋ
ꢋ
ꢉ or t
ꢋ
ꢋ
ꢅꢆRꢊꢃꢇ
ꢅꢆRꢊꢃꢇ
t
ꢅꢆꢈꢅꢁꢇ
ꢅꢆNꢁꢇ
t
t
t
ꢅꢆꢈꢅꢁꢇ
ꢅꢆꢈꢅꢁꢇ
ꢅꢆꢈꢅꢁꢇ
ꢅꢆNꢁꢇ
ꢅꢆNꢁꢇ
ꢋ
ꢅꢆRꢊꢃꢇ
ꢉ or t
ꢉ or t
ꢉ or t
ꢋ
ꢅꢆRꢊꢃꢇ
ꢅꢆRꢊꢃꢇ
ꢅꢆRꢊꢃꢇ
t
Figure 7: Output protocol options with non-direction pulses
12
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
ASIL Safe State
The A19580 sensor IC contains diagnostic circuitry that will
continuously monitor occurrences of failure defects within the IC.
Refer to Figure 8 for the output protocol of the ASIL Safe.
Refer to the ATS19580 Safety Manual for additional details.
ꢀarget
ꢁalley
ꢀooth
ꢄꢅꢅꢆHꢄꢇHꢈ
Normal
ꢂꢃeration
ꢄꢅꢅꢆꢉꢂꢊꢈ
ꢋaꢌlt
ꢄꢅꢅꢆHꢄꢇHꢈ
ꢋaꢌlt
Protocol
ꢄꢅꢅꢆꢉꢂꢊꢈ
ꢄꢋAUꢉꢀ
twꢆꢋAUꢉꢀꢈ
tPꢂ
Figure 8: Output Protocol (ASIL Safe State)
13
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
POWER DERATING
The device must be operated below the maximum junction tem-
perature of the device (TJ(max)). Under certain combinations of
peak conditions, reliable operation may require derating supplied
power or improving the heat dissipation properties of the appli-
cation. This section presents a procedure for correlating factors
affecting operating TJ. (Thermal data is also available on the
Allegro website.)
A worst-case estimate, PD(max), represents the maximum allow-
able power level (VCC(max), ICC(max)), without exceeding TJ(max)
at a selected RθJA and TA
,
Example: Reliability for VCC at TA=150°C, package SN, using a
single-layer PCB.
Observe the worst-case ratings for the device, specifically:
RθJA =150°C/W, TJ(max) =165°C, VCC(max) = 24 V, and ICC(avg)
=
The Package Thermal Resistance (RθJA) is a figure of merit sum-
marizing the ability of the application and the device to dissipate
heat from the junction (die), through all paths to the ambient air.
Its primary component is the Effective Thermal Conductivity (K)
of the printed circuit board, including adjacent devices and traces.
Radiation from the die through the device case (RθJC) is relatively
small component of RθJA. Ambient air temperature (TA) and air
motion are significant external factors, damped by overmolding.
14.6 mA. ICC(avg) is computed using ICC(LOW)(max) and ICC(HIGH)
(max), with a duty cycle of 83% computed from tw(REV)(max) on-
time at 4 kHz maximum operating frequency.
Calculate the maximum allowable power level, PD(max). First,
invert equation 3:
ΔTmax = TJ(max) – TA = 165°C–150°C = 15°C
This provides the allowable increase to TJ resulting from internal
power dissipation. Then, invert equation 2:
The effect of varying power levels (Power Dissipation, PD), can
be estimated. The following formulas represent the fundamental
relationships used to estimate TJ, at PD.
ꢀꢀꢀꢀPD(max) = ΔTmax ÷RθJA =15°C÷150°C/W=100 mW
Finally, invert equation 1 with respect to voltage:
PD = VIN
I
(1)
(2)
(3)
×
IN
ꢀ VCC(est) = PD(max) ÷ ICC(avg) = 100 mW÷14.6 mA= 6.8 V
ꢀ
ꢀ
ΔT = PD
R
θJA
×
The result indicates that, at TA, the application and device cannot
dissipate adequate amounts of heat at operating voltages above
6.8 V at 150°C.
TJ = TA + ΔT
For example, given common conditions such as: TA= 25°C,
VCC = 12 V, ICC = 7.0 mA, and RθJA = 150°C/W, then:
Compare VCC(est) to VCC(max). If VCC(est) ≤ VCC(max), then reli-
able operation between VCC(est) and VCC(max) requires enhanced
RθJA. If VCC(est) ≥ VCC(max), then operation between VCC(est) and
VCC(max) is reliable under these conditions.
PD = VCC
I
= 12 V 7.0 mA = 84 mW
CC
×
×
ꢀ
ΔT = PD
R
= 84 mW 150°C/W = 12.6°C
θJA
×
×
TJ = TA + ΔT = 25°C + 12.6°C = 37.6°C
14
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
PACKAGE OUTLINE DRAWING
For Reference Only – Not for Tooling Use
(Reference DWG-9206, Rev.2)
Dimensions in millimeters – NOT TO SCALE
Dimensions exclusive of mold flash, gate burs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
7.65 0.10
2 × 7°
Lot Number
ATS19580XX
Date Code
2 × 10°
B
2
3
1
G
D Standard Branding Reference View
5.00 0.10
2.755
1.07
Ø2.00 REF
Ejector Pin
C
Lines 1, 2, 3, 4: Up to 10 characters, centered
1.07
1.15 0.05
Line 1: Logo A
F2
F3
F
Line 2: Characters 5, 6, 7, 8, 9, 10, 11 of
Assembly Lot Number
F
2.89
F
Line 3: Part Number:
F
5.78 0.10
3 character prefix (ATS),
5 digit part number (19580),
0-2 character part variant (XX).
Example: ATS19580B
0.90 REF
0.60 REF
F
F1
Branded
Face
2
3
1
Line 4: 4 digit Date Code
B
2.73 REF
0.49 REF
A
0.51 REF
2.54 0.10
0.25 0.05
45°
23.36 REF
15.58 0.10
19.24 REF
2 × 1.00 0.10
3.03 0.10
5.80 REF
9.20 REF
Notes:
A
B
C
D
E
F
Dambar removal protrusion (12×)
45°
Tie bars (8×)
Active Area Depth, 0.60 mm
1.10 REF
1.18 REF
2.00 0.10
Branding scale and appearance at supplier discretion
Molded lead bar for preventing damage to leads during shipment
GMR elements (F1, F2, F3); not to scale
0.30 REF
E
4 × Ø1.00 REF
Ejector Pin
0.90 REF
1.60 0.10
G
Gate location
7.00 0.10
Figure 9: Package SN, 3-Pin SIP
15
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Large Air Gap, GMR Transmission Speed and Direction
Sensor IC for Gear Tooth Sensing
ATS19580
Revision History
Number
Date
Description
–
February 12, 2020
Advance information release
Updated Externally Applied Magnetic Flux Density (p. 2), ASIL Safety Current test conditions (p. 4); added
Pulse Pre-Low Length characteristic (p. 5); updated Performance Characteristics (p. 6); added Characteristic
Plots (p. 8-9); updated Target Design section (p. 11), Figure 8 (p. 13), and Active Area Depth (p. 15).
1
July 24, 2020
Updated status from advance to final release; updated Selection Guide (page 2), Initial Calibration and
Tooth-to-Tooth Variation over 1 TCYCLE values (page 6)
2
November 18, 2020
Copyright 2020, Allegro MicroSystems.
Allegro MicroSystems reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit
improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the
information being relied upon is current.
Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of
Allegro’s product can reasonably be expected to cause bodily harm.
The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems assumes no responsibility for its use; nor
for any infringement of patents or other rights of third parties which may result from its use.
Copies of this document are considered uncontrolled documents.
For the latest version of this document, visit our website:
www.allegromicro.com
16
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
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