Differential Hall Effect Transmission Speed Sensors TLE4951CB

TLE4954C/51C
Differential Hall Effect Transmission Speed Sensors
TLE4954C
TLE4954C-E1
TLE4954C-E2
TLE4954C-E4
TLE4954CB
TLE4954CB-E1
TLE4954CB-E2
TLE4951C
TLE4951CB
Product Information
2013-10-15
Sense & Control
TLE4954C/51C
Table of Contents
Table of Contents
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1
1.1
1.2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Target Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
2.1
2.2
2.2.1
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sensor assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vibration Suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
3.1
3.2
3.3
3.4
3.5
3.6
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ESD Robustness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Timing Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operation characteristics - TLE4951CB, TLE4954CB, TLE4954CB-E1, TLE4954CB-E2 . . . . . . . . . . 9
Reference Target Wheel for TLE4951CB, TLE4954CB, TLE4954CB-E1, TLE4954CB-E2 . . . . . . . . 10
4
4.1
4.2
Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Package Information TLE4954C, TLE4954C-E1, TLE4954C-E2, TLE4951C . . . . . . . . . . . . . . . . . . 11
Package Information TLE4951CB, TLE4954CB, TLE4954CB-E1, TLE4954CB-E2 . . . . . . . . . . . . . 13
Product Information
2
4
4
4
6
2013-10-15
TLE4954C/51C
General
1
General
1.1
Target Application
TLE4954C/51C is an integrated differential Hall effect sensor for transmission applications with two wire PWM
current interface. Its basic function is to provide information about rotational speed and direction of rotation to the
transmission control unit. TLE4954C/51C includes a sophisticated algorithm which actively suppresses vibration
while keeping excellent airgap performance. Infineon also offers customers the possibility to purchase sensors
with already attached back bias magnets (CB versions).
1.2
Features
Product Name
CCW1)
CW2)
Pre Low time
TLE4954C
60 μs
120 μs
30 μs
TLE4954C-E1
45 μs
180 μs
30 μs
TLE4954C-E2
45 μs
90 μs
30 μs
TLE4954C-E4
45 μs
90 μs
15 μs
TLE4951C
Speed signal only
Direction signal
Speed
30 μs above 1kHz
Direction signal up to 8kHz typ.
(ccw) and 12kHz typ. (cw)
none
180 μs
Direction signal up to 8kHz min. 30 μs
(ccw) and 12kHz min. (cw)
All sensors with a B in the product name have an integrated back bias magnet.
TLE4954CB
60 μs
120 μs
30 μs
TLE4954CB-E1
45 μs
180 μs
30 μs
TLE4954CB-E2
45 μs
90 μs
30 μs
TLE4951CB
Speed signal only
30 μs above 1kHz
Direction signal up to 8kHz typ.
(ccw) and 12kHz typ. (cw)
none
180 μs
1) Rotation direction left 2) Rotation direction right
Note: More specific information about the timer-characteristics can be found in the FAQ for TLE4954C/51C.
Product Name
Order Code
Marking
Package
TLE4954C
SP000848260
54C00A
PG-SSO-2-53
TLE4954C-E1
SP000848264
54CE1A
PG-SSO-2-53
TLE4954C-E2
SP000848268
54CE2A
PG-SSO-2-53
TLE4954C-E4
SP001050144
54CE4A
PG-SSO-2-53
TLE4954CB
SP000913564
54CB0A
PG-SSOM-2-11
TLE4954CB-E1
SP000913568
54CB1A
PG-SSOM-2-11
TLE4954CB-E2
SP000913572
54CB2A
PG-SSOM-2-11
TLE4951C
SP000848256
51C00A
PG-SSO-2-53
TLE4951CB
SP000913560
51CB0A
PG-SSOM-2-11
Product Information
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2013-10-15
TLE4954C/51C
Functional Description
2
Functional Description
2.1
General
The differential Hall sensor IC detects the motion of tooth and magnet encoder applications. To detect the motion
of ferromagnetic objects, the magnetic field must be provided by a back biasing permanent magnet. Either south
or north pole of the magnet can be attached to the rear unmarked side of the IC package. The magnetic
measurement is based on three equally spaced Hall elements, integrated on the IC. Both magnetic and
mechanical offsets are cancelled by a self calibration algorithm. The sensor includes a current output PWM
protocol.
2.2
Sensor assembly
Sensor and back bias magnet can be applied in the following ways:
S
N
N
S
S
N
N
S
S
CCW
CW
N
CCW
CW
GYYWW
S 0015
0015
4952
123456
CW
GYYWW
S
S 0015
4952
123456
N
S
VDD
CCW
VDD
GND
GYYWW
S
S 0015
4952
123456
S
N
S
N
GND
VDD
S
N
GND
Figure 2-1 Sensor assembly and definition of rotating directions
The output signals for a south biased sensor with a magnetic encoder and ferromagnetic tooth wheel will be issued
in the following way.
The tooth wheel is rotating in clockwise above the sensor. The output pulse will be issued by reaching the
hysteresis levels after the pre low time. For a tooth wheel with ideal pitch (tooth to tooth) 5mm the direction signal
achieves a phase shift of 90° compared to the speed signal.
CW
GYYWW
S 0015
4952
4952
123456
S
N
VDD
S
N
GND
Figure 2-2 Clockwise rotation; south biased sensor
Product Information
4
2013-10-15
TLE4954C/51C
Functional Description
notch
pre-low
ILow
pre-low
IHigh
tooth
tooth
notch
pre-low
notch
IDD
t
∆Bspeed
Hysteresis
high level
t
Hysteresis
low level
∆Bdir
t
Figure 2-3 Tooth wheel vs. sensor output signal in clockwise rotation; south biased sensor - TLE4954C,
TLE4954C-E1, TLE4954C-E2, TLE4954C-E4
I DD
notch
tooth
notch
tooth
notch
IHigh
ILow
t
∆Bspeed
Hysteresis
high level
t
Hysteresis
low level
∆Bdir
t
Figure 2-4 Tooth wheel vs. sensor output signal in clockwise rotation; south biased sensor - TLE4951C
Product Information
5
2013-10-15
TLE4954C/51C
Specifications
2.2.1
Vibration Suppression
TLE4954C offers two different kinds of vibration suppression:
The magnetic signal amplitude and the direction information are used for detection of parasitic magnetic signals.
Unwanted magnetic signal can be caused by angular or airgap vibrations. If an input signal is identified as a
vibration the output pulse will be suppressed.
•
•
Vibration suppression via hysteresis. This is available after power on
Vibration suppression via direction detection. This is available after start up calibration is performed.
3
Specifications
3.1
Operating Range
Table 3-1
Operating Range
Parameter
Symbol
Values
Min.
Unit
Note / Test Condition
Directly on the IC leads
Typ. Max.
Supply voltage
VDDIC
4
20
V
Operation junction
temperature
Tj
-40
170
°C
Speed signal range
∆Bspeed,range -120
120
mT
3.2
Electrical Characteristics
Table 3-2
Electrical Characteristics
Parameter
Symbol
Values
Min.
Typ.
Unit
Note / Test Condition
Max.
Supply current low
ILow
7
mA
Supply current high
IHigh
14
mA
Output rise/fall slew rate
SRr, SRf
17
mA/μs Valid for tr and tf , between 10% and
90% value RM=75 Ω, Tj<175 °C
Reset voltage
VDD Reset
3.7
Power on time
tON
Period Jitter, f ≤ 2500 Hz
SJit-far,
Tj≤150 °C
Period Jitter, 2500Hz< f <
12kHz
SJit-far,
Tj≤150 °C
3.3
ESD Robustness
Table 3-3
ESD Protection
4
V
1
ms
VDD >4V
3.2
%
+3σ value, VDD=12 V, ∆Bspeed>4 mT
peak to peak
4.2
%
+3σ value, VDD=12 V, ∆Bspeed>4 mT
peak to peak
Parameter
Symbol
Test
Unit
Note
ESD-Protection
VESD
± 12
kV
R = 1.5 kΩ, C = 100 pF
Product Information
6
2013-10-15
TLE4954C/51C
Specifications
3.4
Timing Characteristics
Between each magnetic transition and the rising edge of the corresponding output pulse, the output current is low
for tpre-low in order to allow reliable internal conveyance. After pre low time the output current level is set to high.
After power on the speed pulse is being issued. As soon as the sensor has enough information to recognize the
direction of the target wheel, the output pulse will include the direction information.
Rotation direction is evaluated only for low rotation speed. The speed signal will be delivered again if the magnetic
frequency is above fDR,max .
tpre-low
IDD
IHigh
tpre-low
tS
tpre-low
tccw or tcw
tccw or tcw
ILow
t
∆Bspeed
Hysteresis high level
t
Power On
Hysteresis low level
Uncalibrated Speed Signal
with negative offset
Calibrated Speed Signal
Figure 3-1 Definition of PWM Current Interface - TLE4954C, TLE4954C-E2, TLE4954C-E4
Product Information
7
2013-10-15
TLE4954C/51C
Specifications
tpre-low
IDD
tpre-low
tccw or tcw
IHigh
tccw or tcw
ILow
t
∆Bspeed
Hysteresis high level
t
Power On
Hysteresis low level
Uncalibrated Speed Signal
with negative offset
Calibrated Speed Signal
Figure 3-2 Definition of PWM Current Interface - TLE4954C-E1
IDD
IHigh
tDNC
thyst
thyst
ILow
t
∆Bspeed
Hysteresis high level
t
Power On
Hysteresis low level
Uncalibrated Speed Signal
with negative offset
Calibrated Speed Signal
Figure 3-3 Definition of Current interface - TLE4951C
Product Information
8
2013-10-15
TLE4954C/51C
Specifications
3.5
Operation characteristics - TLE4951CB, TLE4954CB, TLE4954CB-E1,
TLE4954CB-E2
Table 3-4
TLE4954CB, TLE4951CB
Parameter
Symbol
Values
min
typ
Unit
Remarks
max
Operational airgap
AG
3.3
mm
Valid in running mode, measured from sensor
housing (branded side) to target tooth. Valid at
25°C & 0h. No missing output pulses.
Minimum speed
signal
ΔBspeed-limit
2.2
mT
Peak to peak value
99% criteria
Minimum direction
signal
ΔBBdir-limit
0.36
mT
Peak to peak value
99% criteria
Table 3-5
TLE4954CB-E1, TLE4954CB-E2
Parameter
Symbol
Values
min
Unit
Remarks
-
mm
Valid in running mode, measured from sensor
housing (branded side) to target tooth. Valid at
25°C & 0h. No missing output pulses.
typ
max
Operational airgap
AG
Minimum speed
signal
ΔBspeed-limit
2.2
mT
Peak to peak value
99% criteria
Minimum direction
signal
ΔBBdir-limit
0.9
mT
Peak to peak value
99% criteria
Product Information
9
2013-10-15
TLE4954C/51C
Specifications
3.6
Reference Target Wheel for TLE4951CB, TLE4954CB, TLE4954CB-E1,
TLE4954CB-E2
Z
Z
X
Y
Figure 3-4 Reference target wheel
Table 3-6
Reference target wheel geometry
Parameter
Symbol
Typ value
Unit
Outside diameter
d
150
mm
Number of teeth
Z
60
-
50:50
%
Pitch Ratio
Material
Product Information
Remarks
ST37
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TLE4954C/51C
Package Information
4
Package Information
4.1
Package Information TLE4954C, TLE4954C-E1, TLE4954C-E2, TLE4951C
Figure 4-1 Distance of the chip to the upper package edge
Figure 4-2 PG-SSO-2-53 (Plastic Single Small Outline Package) packing, all dimensions in mm
Product Information
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TLE4954C/51C
Package Information
Figure 4-3 PG-SSO-2-53 package outline, dimensions in mm.
Product Information
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TLE4954C/51C
Package Information
4.2
Package Information TLE4951CB, TLE4954CB, TLE4954CB-E1, TLE4954CBE2
Figure 4-4 PG-SSOM-2-11 package outline
N
S
South Pole Biasing
Figure 4-5 Back-bias field orientation
Product Information
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TLE4954C/51C
Package Information
Figure 4-6 PG-SSOM-2-11 blister tape packing information
For additional and more detailed information about the chip and package please visit the Infineon web page
http://www.infineon.com.
Edition 2013-10-15
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2014 Infineon Technologies AG
All Rights Reserved.
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of any third party.
Information
For further information on technology, delivery terms and conditions and prices, please contact the nearest
Infineon Technologies Office (www.infineon.com).
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Product Information
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2013-10-15
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