Dynamic Differential Hall Effect Sensor TLE4924x

TLE4924x
Dynamic Differential Hall Effect Sensor
T LE4924C-2 E6547
T LE4924CB-2 E6547
Product Information
2013-10-04
Sense & Control
TLE4924x
Dynamic Differential Hall Effect Sensor
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
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Sensor assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
3.1
3.2
3.3
3.4
3.5
Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Magnetic Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Characertistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
5
5
5
6
6
4
4.1
4.2
4.3
Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gear Tooth Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
7
7
8
Product Information
2
2013-10-04
TLE4924x
Dynamic Differential Hall Effect Sensor
General
1
General
1.1
Target Application
The TLE4924 is an active Hall sensor suited to detecting the motion and position of ferromagnetic or permanent
magnet targets. An additional self-calibration module is implemented to achieve optimum accuracy during normal
running operation. The device comes in a 3-pin package providing pins for the supply voltage and an open drain
output. Infineon also offers customers the possibility to purchase sensors with already attached back bias magnets
(TLE4924CB-2 E6547).
1.2
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Features
High sensitivity
Single chip solution
Symmetrical thresholds
High resistance to Piezo effects
South and north pole pre-induction possible
Low cut-off frequency
Digital output signal
Advanced performance through dynamic self calibration principle
Wide operating temperature range
Fast start-up time
Large operating air gaps
Reverse voltage protection on VS pin
Short-circuit and overtemperature protection of output
Digital output signal (voltage interface)
Integrated back bias magnet as an option
Module style package with two integrated capacitors:
– 4.7 nF between Q and GND
– 47 nF between VS and GND: Needed for micro cuts in power supply
Type
Order Code
Marking
Package
TLE4924C-2 E6547
SP000718250
24D82
PG-SSO-3-92
TLE4924CB-2 E6547
SP000913548
924D00
PG-SSOM-3-11
Product Information
3
2013-10-04
TLE4924x
Dynamic Differential Hall Effect Sensor
Functional Description
2
Functional Description
2.1
General
The differential Hall sensor IC detects the motion and position of ferromagnetic and permanent magnet structures
by measuring the differential flux density of the magnetic field. To detect ferromagnetic objects the magnetic field
must be provided by a back biasing permanent magnet (south or north pole of the magnet attached to the rear
unmarked side of the IC package).
Offset cancellation is achieved by advanced digital signal processing. Immediately after power-on, motion is
detected (start-up mode). After a few transitions, the sensor has finished self-calibration and switches to a high
accuracy mode (running mode). In running mode, switching occurs at the zero crossing points of the magnetic
signal. This zero crossing is found by calculating the arithmetic mean of the maximum and minimum value of the
magnetic differential signal (∆B). ∆B is defined as the field difference between Hall plate 1 and Hall plate 2. See
Figure 2-2.
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
N
GYYWW
S 0015
S 0015
4952
123456
GYYWW
S 0015
4952
4952
123456
N
S
Vs
GND
Q
Vs
GND
GYYWW
S 0015
S 0015
4952
4952
4952
123456
S
N
N
S
Q
Vs
GND
S
N
Q
Figure 2-1 Sensor assembly
S (N)
Pin 3 (Q)
Pin 1 (Vs)
N (S)
B2
B1
Branded side
Crankshaft Wheel Profile
Differential
magnetic input
signal
Small airgap
Large airgap
Visible adaptive
hysteresis
The magnetic induction (=flux density) around a permanent magnet points from the north pole to the south pole . It is usual to define positive flux when the south pole of a magnet is on the branded side of the IC. This is equivalent to the north pole of the magnet being on the rear of the IC: Output signal VQ
Figure 2-2 System operation with visible adaptive hysteresis
Product Information
4
2013-10-04
TLE4924x
Dynamic Differential Hall Effect Sensor
Specification
3
Specification
3.1
Operating Range
Table 3-1
Operating Range
Parameter
Symbol
Values
Min.
Typ.
Unit
Note / Test Condition
26
V
time limited with RSeries ≥ 200 Ω
Max.
Supply voltage
VS
Continuous output OFF voltage
VQ
18
V
time limited
Continuos output ON current
IQ
20
mA
VQmax = 0.6 V
Operation junction temperature
Tj
175
°C
time limited
3.2
-40
3.2
Electrical Characteristics
Table 3-2
Electrical Characteristics
Parameter
Symbol
Values
Unit
Note / Test Condition
6.8
mA
–
Output saturation voltage VQsat
0.25
V
IQ = 20 mA
Output rise time
tr
12
µs
VLoad= 4.5 to 24 V
RLoad = 1.2 kΩ
CLoad = 4.7 nF included in package.
Output fall time
tf
0.9
µs
VLoad= 5 V
RLoad = 1.2 kΩ
CLoad = 4.7 nF included in package.
Delay time
td
12.5
µs
Frequency range
f
–
Min.
Supply current
IS
3.3
ESD Protection
Table 3-3
ESD Protection
Parameter
ESD Protection
PG-SSO-3-92
Product Information
Symbol
VESD
Typ.
Max.
8
Values
Min.
Typ.
Max.
–
–
±6
5
kHz
Unit
Note / Test Condition
kV
According to standard EIA/JESD22-A114-B
Human Body Model (HBM 1500 Ω / 100 pF).
2013-10-04
TLE4924x
Dynamic Differential Hall Effect Sensor
Specification
3.4
Magnetic Characteristics
Table 3-4
Magnetic Characteristics in Running Mode
Parameter
Symbol
Values
Min.
Minimum signal amplitude |∆Bmin|
Unit
Typ.
Max.
0.75
mT
3.5
Operating Characertistics
Table 3-5
Operating Characteristics - TLE4924CB-2 E6547
Parameter
Symbol
Values
min
Operational airgap
AG
0.5
Phase jitter
ϕjitter
0.35
typ
Note / Test Condition
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.
max
1.35 °crank Output falling edge 360° repeatability, 1000 rotations,
3 sigma value, min. input signal size 10 mTpp
Z
Z
X
Y
Figure 3-1 Reference target wheel - TLE4924CB-2 E6547
Table 3-6
Reference target wheel geometry - TLE4924CB-2 E6547
Parameter
Symbol
Typ value
Unit
Outside diameter
d
150
mm
Number of teeth
Z
60
-
50:50
%
Pitch Ratio
Material
Product Information
Remarks
ST37
6
2013-10-04
TLE4924x
Dynamic Differential Hall Effect Sensor
Package Information
4
Package Information
4.1
Application Example
3-Wire Application
RP
RP
Line
VS
RL
1
VS
4.7 nF*
Q
3
GND
2
VSIGNAL
4.7 nF*
Sensor
For example:
Mainframe
RL = 1.2 kΩ
RP = 200Ω
Figure 4-1 TLE4924 Application Circuits (*capacitors included in package)
4.2
Gear Tooth Sensing
In the case of ferromagnetic toothed wheel applications, the IC must be biased by the south or north pole of a
permanent magnet which should cover both Hall probes (e.g. a SmCO5 magnet (Vacuumschmelze VX145) with
dimensions 8 mm x 5 mm x 3 mm).
The maximum air gap depends on:
•
•
The magnetic field strength (magnet used; pre-induction).
The toothed wheel that is used (dimensions, material, etc.; resulting differential field).
a
b
L
Centered distance
of Hall probes
Hall probes to
IC surface
IC surface to
tooth wheel
a = 2.5 mm
b = 0.3 mm
Figure 4-2 Sensor Spacing
Product Information
7
2013-10-04
TLE4924x
Dynamic Differential Hall Effect Sensor
Package Information
Conversion DIN – ASA
m = 25.4 mm/p
T = 25.4 mm CP
DIN
d
z
m
T
diameter (mm)
number of teeth
module m = d/z (mm)
pitch T = π x m (mm)
ASA
p
PD
CP
diameter pitch p = z/d (inch)
pitch diameter PD = z/p (inch)
circular pitch CP = 1 inch x π/p
Figure 4-3 Toothed Wheel Dimensions
4.3
Package Information
Figure 4-4 Package Dimensions of PG-SSOM-3-11 (Plastic Green Single Small Outline)
Product Information
8
2013-10-04
TLE4924x
Dynamic Differential Hall Effect Sensor
Package Information
Figure 4-5 Tape Loading Orientation in PG-SSOM-3-11 Package
Figure 4-6 PG-SSOM-3-11 package outline - TLE4924CB-2 E6547
Product Information
9
2013-10-04
TLE4924x
Dynamic Differential Hall Effect Sensor
Package Information
N
S
South Pole Biasing
Figure 4-7 Back-bias field orientation - TLE4924CB-2 E6547
Figure 4-8 PG-SSOM-3-11 blister tape packing information -TLE4924CB-2 E6547
For additional packages information, sort of packing and others, please see Infineon internet web page:
http://www.infineon.com/products
Product Information
10
2013-10-04
TLE4924x
Dynamic Differential Hall Effect Sensor
Package Information
Edition 2013-10-04
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2014 Infineon Technologies AG
All Rights Reserved.
Legal Disclaimer
The information given in this document shall in no event be regarded as a guarantee of conditions or
characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any
information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties
and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights
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).
Warnings
Due to technical requirements, components may contain dangerous substances. For information on the types in
question, please contact the nearest Infineon Technologies Office. Infineon Technologies components may be
used in life-support devices or systems only with the express written approval of Infineon Technologies, if a failure
of such components can reasonably be expected to cause the failure of that life-support device or system or to
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Product Information
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2013-10-04
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