Highly robust, easy-to-use mono-Hall speed sensor with Twist Independent Mounting (TIM)

TLE4922
1
Product Description
The TLE4922 is an active mono cell Hall sensor suited to detect the motion and
position of ferromagnetic and permanent magnet structures. An additional selfcalibration module has been implemented to achieve optimum accuracy during
normal running operation.
1.1
Target Application
The TLE4922 is a speed sensor for small engine (2- and 3 wheeler) applications.
Figure 1-1
Crankshaft speed and position sensing
Transmission speed on output shaft
Speedometer application
Excellent sensitivity and accuracy combined with its wide operational temperature
range makes the sensor ideally suited for harsh environments.
1.2
•
•
•
•
•
•
•
•
•
•
•
Package PG-SSO-4-1
Key Features and benefits
Twist independent mounting (TIM) “enables one sensor fits all”.
Small thin package (PG-SSO-4-1)
Protected against harsh environment due to
– Short-circuit at the output
– Over temperature shutdown at the output and
– Reverse voltage protection
Supreme performance due to adaptive symmetrical hysteresis / threshold
Independent of back bias magnet polarity due to ±440mT full scale range
Enhanced EMC & ESD robustness - ESD : ±4kV HBM
Wide operating temperature range - Tjunction: -40 °C - 155 °C
True zero speed up to 8kHz signal frequency
Enabling Low Power Application: Idd = 5mA at Vdd = 9V
Large operating voltage range of 4.5V up to 18V
Robustness against wheel run outs enables to sense broad range of wheels
Figure 1-2
Pinning, Sensitive Area
VDD
Hall
Supply
Analog
Supply
Digital
Supply
GND
Chopped
Hall Probe
Tracking
ADC
Figure 1-3
D-Core
(Min/Max, Offset,
Comparator)
Open Drain
Blockdiagram TLE4922
V BATT
V LOAD
R SERIES
200 Ω
VBATT
Figure 1-4
Product Type
Marking
Ordering Code
Package
TLE4922-XAN-F
22BAA1
SP001106758
PG-SSO-4-1
TLE4922-XIN-F
22BAA2
SP001154230
PG-SSO-4-1
Product Information
1
VQ
RLOAD
1.2 k Ω
V DD
CV DD
47 nF
Q
GND
IC1
TLE4922
VQ
IQ
CQ
4.7 nF
CLOAD
50 pF
Application circuit TLE4922
Figure 1-5 Wheel with sensor
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TLE4922
Specification
2
Specification
The listed characteristics are ensured over the operating range and lifetime of the integrated circuit.
2.1
Absolute Maximum Ratings
Table 2-1
Absolute Maximum Ratings
Parameter
Symbol
Values
Unit
Note or Test Condition
Min. Typ. Max.
Supply voltage
Output OFF voltage
Output ON voltage
Junction temperature
Passive overall lifetime
-18
-
-
V
-
-
18
V
valid for TLE4922-XAN-F
-
-
24
V
max. 1 hour, valid for TLE4922-XIN-F
VSAC
-
-
30
V
max. 1 min with RSERIES = 200Ω
VQ
-1
-
-
V
max. 60 min @ TA = 25°C
-0.3
-
18
V
-
-
18
V
195
°C
3h
150
°C
0.2 years for TLE4922-XAN-F
VS
VQ
1)
TJ
TPol
2)
-40
-
0.5 years for TLE4922-XIN-F
ESD compliance
1)
2)
ESDHBM
-40
-
50
°C
15 years
-4
-
4
kV
HBM according ANSI/ESDA/JEDEC JS-001
In temperature range between operating temperature and absolute maximum temperature no functionality is guaranteed.
Maximum exposure time at other junction temperatures shall be calculated based on the values specified using the Arrhenius-model.
Note:
Stresses above the max. values listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability. Maximum ratings are absolute ratings; exceeding only one of these values may cause irreversible
damage to the integrated circuit.
2.2
Operating Range
The following operating conditions must not be exceeded in order to ensure correct operation of the IC. All parameters specified in the
following sections refer to these operating conditions unless otherwise mentioned.
Table 2-2
Operating Range
Parameter
Symbol
Values
Unit
Note or Test Condition
Min. Typ. Max.
Supply voltage
Continuous output ON current
Operating junction temperature
Frequency range of magnetic
input signal
1)
2)
VS
IQ
TJ
f
1)
4.5
-
16
V
valid for TLE4922-XAN-F
4.5
-
18
V
valid for TLE4922-XIN-F
-
-
8.8
mA
-40
-
155
°C
2000h for TLE4922-XAN-F
-40
-
155
°C
5000h for TLE4922-XIN-F
02)
-
8000
Hz
Typical RthJA is 170K/W. As soon as back bias magnet is attached or customer mold coveres the TLE4922 this value will decrease due to larger
surface and mass of the module. Maximum exposure time at other junction temperatures shall be calculated based on the values specified using
the Arrhenius-model.
Maximum one additional pulse may occur due to temperature variation during stand still.
Product Information
2
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TLE4922
Specification
2.3
Electrical Characteristics
Table 2-3
Electrical Parameters
Parameter
Symbol
Values
Unit
Note or Test Condition
Min. Typ. Max.
Supply current
IS
3.5
5.3
7.0
mA
Output saturation voltage
VQSAT
-
0.15
0.4
V
Output leakage current
IQLEAK
-
-
1
μA
Current limit for short-circuit
protection
IQSHORT1)
40
46
52
mA
Junction temperature for output
protection
TPROT1)
-
195
tbd
°C
Power on time
tON1)
Output fall time
Output rise time
Delay time
1)
2)
3)
tf
IQ = 8.8 mA
Output will shut down (high impedance)
when exceeded
-
0.7
0.9
ms
2)
2.2
2.8
3.8
μs
VLOAD = 5 V, CLOAD =4.7 nF, RLOAD = 1.2 kΩ
1)2)
1
-
20
µs
VLOAD = 5 V, CLOAD =4.7 nF, RLOAD = 1.2 kΩ
1)3)
12.5
18
23.5
μs
VLOAD = 5 V, CLOAD =4.7 nF, RLOAD = 1.2 kΩ,
f=5kHz, see Figure 2-1
tr
td
Parameter is characterized by simulation/verification
Time between 20% and 80% value of VLOAD
Only valid for the falling edge
2.4
Magnetic Characteristics and Self-Calibration Characteristics
Table 2-4
Magnetic Characteristics and Self-Calibration Characteristics: 10 Gauss = 1mT
Parameter
Symbol
Values
Unit
Note / Test Condition
Min. Typ. Max.
Linear Region
BLR
1)
Peak to peak magnetic hysteresis BMIN
1)
-400 -
400
mT
2.0
3.0
5.3
mT
Full frequency range
2.0
3.0
3.8
mT
Up to 3kHz signal frequency
At Ta=25°C, please notice relation between
back bias magnet and linear region as
described in user manual
Back Bias Magnet Range
BBIAS
-400 -
400
mT
Duty Cycle
DC2)
40
50
60
%
30
50
70
%
Including EMC (magnetic distortion)
-
3
-
At 4th falling edge full accuracy reached.
Number of falling output edges
required to be calibrated
nCalib 2)3) -
Relative phase error in calibrated ϕrel2)4)
mode
-
± 0.3 ± 1.5 °crank Forward and backward rotational direction.
Temperature and airgap included.
Output falling edge repeatability ϕjitter2)4)
(phase jitter) in calibrated mode
-
0.05 0.2
1)
2)
3)
4)
°crank 99.7 %, 3 pulses out of 1000 above limit.
Equivalent to ± 3sigma of a Gaussian
distribution.
is calculated out of measured sensitivity
Parameter is characterized by simulation/verification
Maximum one additional pulse may occur due to temperature variation during stand still
Performance measured on wheel described in Chapter 2.6 within air gap range 0.5mm to 3.2mm
Product Information
3
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TLE4922
Specification
M agnetic encoder
N
S
N
S
N
Tooth
Gearwheel
Notch
Threshold
crossing
switching
points
Magnetic
input signal
Sensor
output
signal
Threshold crossing
switching points
Delay time td
ᵠ jitter
Delay time td
Figure 2-1
Phase error and delay time definition
2.5
Electromagnetic Compatibility (EMC)
99.7%
Sensor output signal
Phase jitter definition
The TLE4922 is characterized according to the IC level EMC requirements described in the “Generic IC EMC Test
Specification” Version 1.2 from 20071). Additionally, component level EMC characterizations according to ISO 76372:2011, ISO 7637-3:2007 and ISO 16750-2:2010 regarding pulse immunity and CISPR 25 (2009-01) Ed. 3.0 regarding
conducted emissions are performed.
Figure 1-4 on first page outlines all needed external components to operate the DUT under application conditions. They
are treated as inherent part of the DUT during component level EMC characterizations.
Note:
Characterisation of Electro Magnetic Compatibility (EMC) are carried out on sample base of one qualification lot. Not all specification
parameters are monitored during EMC exposure. Only key parameters e.g. switching current and duty cycle are monitored.
Parameter
Symbol
Level
Class
Testpulse 1
VEMC
-100 V
C
Testpulse 2a1)
100 V
A
Testpulse 2b
10 V
C
Testpulse 3a
-150 V
A
Testpulse 3b
100 V
A
-7 V
C
86.5 V
A
Testpulse 4
2)
Testpulse 5b
3)
1)
2)
3)
ISO 7637-2 (2004) describes internal resistance = 2Ω
According to 7637-2 for test pulse 4 the test voltage shall be 12 V +/- 0.2 V.
A central load dump protection of 35V is used.
1)
The document is available online at http://www.zvei.org/Verband/Publikationen/Seiten/Generic-IC-EMCTest-Specification-english.aspx
Product Information
4
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TLE4922
Specification
2.6
Reference Target Wheel
Table 2-5
Toothed wheel performance
Parameter
Symbol
Values
Unit
Note or Test Condition
Min. Typ. Max.
AG1)2)
Operational IC air-gap
-
-
3.2
mm
Field strength of 300mT at 0.7mm above
surface of back-bias magnet;
Air-gap variation over one complete AGGLRO 1)
target revolution. Global run-out.
-
0.5
mm
Difference between min. and max. air-gap
over one complete target revolution.
1)
2)
Parameter is characterized by verification
Measured from surface of package to toothed wheel, explained in Figure 2-2.
Figure 2-2
Infineon reference toothed wheel: dimension in mm
Table 2-6
Reference target wheel geometry
Parameter
Typ value
Unit
Material
ST37
-
Tooth notch ratio
1.00
Product Information
5
Remarks
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TLE4922
Specification
2.7
Performance Graphs
Following graphs of typical sensor behavior will help to optimize application performance:
Supply current @ Vdd=9V
Supply current
6,5
5,5
6
5,25
5,5
[mA]
[mA]
Tj=25°C
5
Tj=100°C
5
4,75
4,5
4
4,5
-60
-30
0
30
60
90
120
150
180
3
5
7
9
Tj[C]
Fall time @ Vout=5V
15
17
19
3
3
[us]
[us]
3,5
2,5
2
2
-50
0
50
100
150
4
6
8
10
Tj [°C]
14
16
18
Minimum magnetic field @ Tj=25°C
4,5
4
4
3,5
3,5
[mTpp]
4,5
3
3
2,5
2,5
2
2
-50
0
50
100
150
100
Duty cycle @ 'B=10mTpp
Duty cycle @ 'B=10mTpp
60
10000
1000
Freq[Hz]
Tj[C]
60
58
58
56
56
54
54
52
52
[%]
[%]
12
VDD [V]
Minimum magnetic field @ f=1kHz
[mTpp]
13
Fall time @ Vout=5V @ Tj=25°C
3,5
2,5
50
50
48
48
46
46
44
44
42
42
40
40
-50
0
50
100
150
10
Tj[C]
Figure 2-3
11
Vdd[V]
100
1000
10000
Freq[Hz]
Typical Performance
Product Information
6
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TLE4922
Specification
2.8
Application
Basic functionality
The TLE4922 is a mono-cell Hall sensor with analog to digital converter and full digital signal processing for detecting the
magnetic field crossing of the threshold levels. A chopped Hall probe is used to get rid of the offset and has advantages
for 0-Hz feature. The Figure 2-1 shows the basic functionality of TLE4922.
Unique Feature: Polarity of Pre Induction
The back bias magnet can be mounted in both directions to TLE4922 without any difference in performance. One polarity
results in switching the output to “LOW” when passing a tooth and to “HIGH” when passing a notch, whereas the other
poarity of back-bias magnet will switch the output to “HIGH” when passing a tooth and to “LOW” when passing a notch.
Figure 2-4
Changing polarity of back bias magnet will change the polarity of TLE4922 output
Start-Up and Running Mode
In Start-Up-Mode the TLE4922 starts with output at “HIGH” and stays there until a first minimum in magnetic field is
detected after start-up time. Calibrated mode is reached after a maximum of four output transitions (3 falling output
edges). At the 4th falling edge full accuracy on output signal is reached. These first transitions are determined by the
detection of magnetic signal maxima and minima. Output transitions in running phase are determined by the hidden
adaptive hysteresis algorithm.
Application circuit
Figure 1-4 on page one shows an option of an application circuit. The resistor RS is recommended due to reason of EMC.
The resistor RL has to be at a value to match the applied VECU to keep IQ limited to the operating range of maximal 8.8mA.
e.g.: VLOAD = 9V: IQ = 9V/1200 Ω = 7.5mA
Consideration on RthJA
The Rth is modified by attaching a back-bias magnet or doing overmolding at the customer. There is a further
dependency on the attached wires: The thicker the attached wire the smaller the value of Rth. Further it depends on
ambient condition: When one end of the module is cooled in oil or through air-flow the RthJA will further decrease.
Global run out
Due to averaging global run out is depending on the number of teeth. The wheel in Chapter 2.6 allows a global run out
of 0.8mm. As designed wheels with equal or more then 8 teeth are still capable of up to 0.5mm global run out.
Product Information
7
V 1.0, 2016-04-26
TLE4922
Package Information
3
Package Information
Green Product (RoHS compliant)
To meet the world-wide customer requirements for environmentally friendly products and to be compliant with
government regulations the device is available as a green product. Green products are RoHS-Compliant (i.e Pb-free finish
on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020).
3.1
Package Information PG-SSO-4-1
Pure tin covering (green lead plating) is used. The product is RoHS (Restriction of Hazardous Substances) compliant and
marked with letter G in front of the data code marking and may contain a data matrix code on the rear side of the package
(see also information note 136/03). Please refer to your key account team or regional sales if your need further
information.
Figure 3-1
Marking pattern
Figure 3-2
PG-SSO-4-1 package dimensions
Product Information
8
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TLE4922
Package Information
Figure 3-3
PG-SSO-4-1 packaging
Product Information
9
V 1.0, 2016-04-26
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TOKO™ of TOKO KABUSHIKI KAISHA TA. UNIX™ of X/Open Company Limited. VERILOG™, PALLADIUM™ of Cadence Design Systems, Inc. VLYNQ™ of Texas
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Last Trademarks Update 2011-11-11
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Edition 2016-04-26
Published by
Infineon Technologies AG
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