TLE4927C E6547 [INFINEON]
Infineon´s TLE4927C detects the motion and positi;
| 型号： | TLE4927C E6547 |
| 厂家： | 
Infineon |
| 描述： | Infineon´s TLE4927C detects the motion and positi |
| 文件： | 总25页 (文件大小：962K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TLE4927C
Dynamic Differential Hall Effect Sensor
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 by dynamic self-calibration principle
Two-wire and three-wire configuration possible
Wide operating temperature range
Fast start-up time
Large operating air-gaps
Reverse voltage protection at VS-pin
Short- circuit and over temperature protection of output
Digital output signal (voltage interface)
Module style package with two integrated capacitors:
o
o
4.7nF between Q and GND
47nF1 between VS and GND: Needed for micro cuts in power supply
Potential applications
•
Automotive Crankshaft applications and similar, industrial speed sensor applications
Product validation
Qualified for Automotive Applications.
Product Validation according to AEC-Q100/101
Description
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).
Ordering Information
Type
Marking
Ordering Code
Package
TLE4927C E6547
27D8
SP000718266
PG-SSO-3-92
1 value of capacitor: 47nF10%; (excluded drift due to temperature and over lifetime); ceramic: X8R; maximum voltage: 50V.
Data Sheet
www.infineon.com
Please read the Important Notice and Warnings at the end of this document
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TLE4927C
Dynamic Differential Hall Effect Sensor
Functional Description
General Information
The TLE4927C E6547 is an active Hall sensor suited to detect the motion and position of ferromagnetic and
permanent magnet structures. An additional self-calibration module has been implemented to achieve
optimum accuracy during normal running operation. It comes in a three-pin package for the supply voltage and
an open drain output.
VS
GND
47nF
4.7nF
Figure 1
Pin configuration PG-SSO-3-92
Pin No.
Symbol
VS
Function
1
2
3
Supply Voltage
Ground
GND
Q
Open Dain Output
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Table of contents
Table of contents
Features ........................................................................................................................................ 1
Potential applications..................................................................................................................... 1
Product validation.......................................................................................................................... 1
Description .................................................................................................................................... 1
General Information ....................................................................................................................... 2
Table of contents............................................................................................................................ 3
1
1.1
1.1.1
1.1.2
Functional Description............................................................................................................ 4
Circuit Description...................................................................................................................................4
Startup mode .....................................................................................................................................4
Running mode....................................................................................................................................5
2
General Characteristics........................................................................................................... 6
Absolute Maximum Ratings ....................................................................................................................6
Operating Range......................................................................................................................................7
AC/DC Characteristics .............................................................................................................................8
Magnetic Characteristics in Running Mode ............................................................................................9
Typical Hysteresis Values......................................................................................................................10
Self-calibration Characteristics ............................................................................................................10
2.1
2.2
2.3
2.4
2.5
2.6
3
3.1
Application Configurations.....................................................................................................13
Gear Tooth Sensing ...............................................................................................................................13
4
5
Electro Magnetic Compatibility...............................................................................................17
Package Information .............................................................................................................19
Appendix: .....................................................................................................................................21
Revision history.............................................................................................................................24
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Functional Description
1
Functional Description
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 signal zero-crossing of the arithmetic
mean of max and min value of magnetic differential signal. B is defined as difference between hall plate 1 and
hall plate 2.
1.1
Circuit Description
The TLE4927C E6547 is comprised of a supply voltage regulator, a pair of hall probes, spaced at 2.5mm,
differential amplifier, noise-shaping filter, comparator, advanced digital signal processor (DSP), A/D and D/A
converter and an open drain output.
Figure 2
Block diagram of TLE4927C E6547
1.1.1
Startup mode
The differential signal is digitized in the A/D converter and fed into the DSP part of the circuit. There a rising or
falling transition is detected and the output stage is triggered accordingly. As the signal is not offset
compensated at this time, the output does not necessarily switch at zero-crossing of the magnetic signal.
Signal peaks are also detected in the digital circuit and their arithmetic mean value can be calculated. The
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Functional Description
offset of this mean value is determined and fed into the offset cancellation DAC. This procedure can be
repeated with increasing accuracy. After few increments the IC is switched into the high accuracy running
mode.
1.1.2
Running mode
In running mode, the output is triggered by the comparator. An offset cancellation feedback loop is formed by
the A/D converter, DSP and offset cancellation D/A converter. In running mode switching always occurs at zero-
crossing. It is only affected by the (small) remaining offset of the comparator and by the remaining propagation
delay time of the signal path, mainly determined by the noise-shaping filter. Nevertheless, signals below a
defined threshold are not detected to avoid unwanted parasitic switching.
peak detection
offset= (max + min) / 2
offset
offset
correction
Startup-mode
Startup of the device
Running-mode
Figure 3
At transition from startup-mode to running mode switching timing is moving from low-accuracy to high
accuracy zero-crossing.
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
General Characteristics
2
General Characteristics
2.1
Absolute Maximum Ratings
Parameter
Symbol
Values
Typ.
Unit Note or Test Condition
Min.
Max.
Supply voltage
VS
-18
-24
-26
-28
18
24
26
28
V
V
V
V
-
1h with RSeries 200
5min with RSeries 200
1min with RSeries 200
-
Supply current
IS
-10
25
mA
Output OFF voltage
VQ
-0.3
-18
-18
-1.0
18
24
26
-
V
V
V
V
-
1h with RLoad 500
5min with RLoad 500
1h (protected by internal
series resistor)
Output ON voltage
VQ
-
-
-
16
18
24
V
V
V
Current internal limited by
short circuit protection
(72h @ TA 40°C).
Current internal limited by
short circuit protection
(1h @ TA 40°C).
Current internal limited by
short circuit protection
(1min @ TA 40°C).
Continuous output
current
IQ
Tj
-50
-40
50
mA
-
Junction temperature
°C
°C
°C
°C
°C
-
155
165
175
195
2000h (not additive)
1000h (not additive)
168 h (not additive)
3 x1 h (additive to the
other life times).
Storage temperature
TS
-40
±6
150
190
°C
-
Thermal resistance
junction-air for
PG-SSO-3-92
Rth JA
K/W Lower values are possible
with overmoulded devices.
ESD-protection
PG-SSO-3-92
VESD
kV
According to standard
EIA/JESD22-A114-B
Human Body Model
(HBM 1500 Ohm/100pF)
2 Accumulated life time.
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
General Characteristics
Note:
Stresses above those listed here may cause permanent damage to the device. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
2.2
Operating Range
Parameter
Symbol
Values
Typ.
Unit Note or Test Condition
Min.
Max.
18
Supply voltage
VS
Continuous
3.2
V
V
V
1h with RSeries 200
24
26
5min with RSeries 200
Extended limits for
parameters in
characteristics.
3
V
During test pulse 4. Limited
performance possible
Supply voltage ripple
VSAC
6
Vpp
V
VS=13V; 0 < f < 50kHz
Continuous
Continuous output OFF VQ
voltage
0
0
0
18
24
20
V
1h with RLoad 500
VQmax=0.6V
Continuous output ON
Current
IQ
mA
Power on time
ton
1.0
ms
Time to achieve specified
accuracy. After power on
the output of the IC is
always in high-state. After
internal resets output is
locked3.
Operating junction
temperature
Tj
-40
°C
°C
°C
°C
-
155
165
175
2000 h (not additive)
1000 h (not additive)
168 h (not additive)
reduced signal quality
permittable (e.g. jitter)
Note:
Unless otherwise noted, all temperatures refer to junction temperature. For the supply
voltage lower than 28V (RSeries 200) and junction temperature lower than 195°C the
magnetic and AC/DC characteristics can exceed the specification limits
3 Output of the IC is locked in present state (high-state or low-state) after an internal reset is launched. This reset happens
typically every 780ms when there is no output switching in either case. See also “Offset recalibration time after last output
change, treset”. A voltage reset causes a release of the output and output is in high state after power on again.
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
General Characteristics
2.3
AC/DC Characteristics
Parameter
Symbol
Min.
Values
Typ.
Unit Note or Test Condition
Max.
9
Supply current
IS
-
3
3
3
6.8
6.7
7
mA
mA
mA
V
Supply current @ 3.2V IS_Vs_min
VS=3.2V
8.5
9.5
Supply current @ 24V
IS_Vs_max
VQsat
VS=24V, RSeries 200
IQ= 20mA
Output saturation
voltage
0.25
0.6
Output leakage current IQleak
0.1
60
10
80
µA
VQ= 18V
-
Current limit for short-
Circuit protection
IQshort
30
mA
Junction temperature
limit for output
protection
Tprot
195
210
12
230
20
°C
µs
-
Output rise time
Output fall time
tr4
4
VLoad = 4.5 to 24V
RLoad = 1.2k;
CLoad = 4.7nF included
in package
tf5
0.5
0.9
1.3
µs
µs
VLoad = 5V
0.65
1.15
1.65
VLoad = 12V
RLoad = 1.2k;
CLoad = 4.7nF included
in package
Delay time
Falling edge
Rising edge
td
7
12.5
186
20
257
µs
µs
Only valid for Tj=25°C.
Tj=-40°C -Tj=175°C
Tj=-40°C -Tj=175°C
Higher magnetic slopes
and overshoots reduce td,
because the signal is
filtered internal8
39
6
8
µs
Time over specified
temperature range; not
additional to td
Temperature drift of
delay time of output to
magnetic edge
td
-6
Operation below 1Hz10
Frequency range
f
0.001
kHz
4 value of capacitor: 4.7nF10%; (excluded drift due to temperature); ceramic: X8R; maximum voltage: 50V. The rise time is
defined as the time between the 10 and 90% value.
5 see footnote 4.
6 only valid for the falling edge.
7 Not subject to production test-verified by design/characterisation
8 measured with a sinusoidal-field with 10mTpp and a frequency of 1kHz.
9 related to Tj= 175°C.
10 output will switch if magnetic signal is changing more that 2xBmin within offset recalibration time even below 1Hz once per
magnetic edge, increased phase error is possible
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
General Characteristics
Parameter
Symbol
Values
Typ.
Unit Note or Test Condition
Min.
Max.
Oscillator frequency
fOSC
treset
1.34
780
MHz
ms
-
Offset recalibration
time after last output
change
625
970
Output locked to state
before recalibration
Clamping voltage
VS-pin
VSclamp
VQclamp
VSreset
24
24
27.5
27.5
2.35
V
V
V
1 mA through clamping
device
Clamping voltage Q-
pin
1 mA through clamping
device
Analog reset voltage
2.9
-
Note:
The listed AC/DC and magnetic characteristics are ensured over the operating range of the
integrated circuit. Typical characteristics specify mean values expected over the production
spread. If not other specified, typical characteristics apply at Tj = 25 °C and VS = 12 V
2.4
Magnetic Characteristics in Running Mode
Parameter
Symbol
Values
Typ.
Unit Note or Test Condition
Min.
-500
-30
Max.
500
30
Bias preinduction
B0
-
-
mT
mT
Differential bias
induction
B0
Bmin11
Minimum signal
amplitude
0.35
0.75
1.35
100
0.2
mT
mT
mT
12
Maximum signal
amplitude
Additional to B0
F= 2N
Bmax
Resistivity against
Bmin
-0.2
mechanical stress
(piezo)
Note:
The listed characteristics are ensured over the operating range of the integrated circuit. Typical
characteristics specify mean values expected over the production spread. If not otherwise
specified, typical characteristics apply at Tj=25°C and the given supply voltage.
11 |∆Bmin| refers to 50 % criteria: 50 % of output pulses are lost, sinusoidal input signal
12 exceeding this limit might result in decreased duty cycle performance. With higher values the internal measured signal will be
clipped. This will decrease the phase accuracy.
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
General Characteristics
2.5
Typical Hysteresis Values
PGA
GainRange
Hysteresis (peak
FullRange
=MaxSignal
Percentage
thresholds
to peak)
10.6 mT
8.0 mT
5.5 mT
3.8 mT
2.6 mT
1.8 mT
1.3 mT
X1
6
5
4
3
2
1
0
4.42 %
6.67 %
9.17 %
12.67 %
17.33 %
24 %
120 mT
60 mT
X2
X4
30 mT
X8
15 mT
X16
X32
X64
7.5 mT
3.75 mT
1.875 mT
34.67 %
2.6
Self-calibration Characteristics
Parameter
Symbol
Values
Typ.
Unit Note or Test Condition
Min.
Max.
No. of magnetic edges
for first output switching
nStart
nCalib
latest 2nd magnetic edge
-
2
will cause output switching
No. of magnetic edges
to enter calibrated
mode
Low phase accuracy
permitted (see:
6
-
uncalibrated phase error).
7th edge with high
accuracy. Valid for
sinusoidal signal without
noise influence
Duty cycle in running
mode13
Dty
45
40
50
50
55
60
%
%
BPP = 10mT ideal
sinusoidal input signal
(Tj=25°C)
BPP = 10mT ideal
sinusoidal input signal
(-40°C Tj < 175°C)
0.1114
0.16
BPP = 10mT ideal
sinusoidal input signal;
Tj<150°C
Signal jitter in running
mode; 1 sigma value6
%
%
1
2
BPP = 10mT ideal
sinusoidal input signal;
150°C Tj < 175°C
Signal Jitter in running
mode at power supply
of VS=13V and ripple
3V; 1 sigma value6
%
3
0.11
BPP = 10mT ideal
sinusoidal input signal;
Tj<150°C
Bneff
25
µT
Tj = 25°C; The magnetic
noise is normal distributed,
13 this corresponds to a B0 = 0mT (magnetic offset).
14 depends largely onBmin magnetic signal steepness and also on frequency.
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
General Characteristics
Parameter
Symbol
Values
Typ.
Unit Note or Test Condition
Min.
Max.
nearly independent to
frequency and without
sampling noise or digital
noise effects. The typical
value represents the rms-
value here and
Effective noise value of
the magnetic switching
points, 1 sigma value
corresponds therefore to
1 probability of normal
distribution. Consequently
a 3 value corresponds to
0.3% probability of
appearance.
70
µT
The max value
corresponds to the rms-
values in the full
temperature range and
includes technological
spreads.
Related to calibrated
switching behaviour.
BPP = 10mT ideal
sinusoidal input
Uncalibrated phase
error:
Magnetic edge 1-3
After 3rd edge
°
90
55
signal15 Magnetic fields
close to 2xBmin
15 smaller phase errors are possible at higher signal amplitudes, because sinus signal changes to a more rectangle signal.
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
General Characteristics
Figure 4
Switching direction
Figure 5
Definition of signal jitter
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Application Configurations
3
Application Configurations
Two possible applications are shown in Figure 8 and Figure 9 (Toothed and Magnet Wheel). The difference
between two-wire and three-wire application is shown in Figure 10.
3.1
Gear Tooth Sensing
In the case of ferromagnetic toothed wheel application, the IC has to be biased by the south or north pole of a
permanent magnet (e.g. SmCO5 (Vacuumschmelze VX145) with the dimensions 8 mm x 5 mm x 3 mm) which
should cover both Hall probes.
The maximum air gap depends on:
−
−
the magnetic field strength (magnet used; pre-induction) and
the toothed wheel that is used (dimensions, material, etc.; resulting differential field).
Figure 6
Sensor spacing
Figure 7
Toothed wheel dimensions
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Application Configurations
Figure 8
TLE4927C, with ferromagnetic toothed wheel
Figure 9
TLE4927C, with magnet wheel
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Application Configurations
Figure 10
Application circuits TLE4927C (capacitors included in package)
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Application Configurations
S (N)
N (S)
Pin 3 (Q)
Pin 1 (Vs)
B2
B1
Branded Side
Crankshaft Wheel Profile
Small airgap
Large airgap
Magnetic Field Difference
B=B1-B2
BENOP
Hidden Adaptive
Hysteresis
BENRP
Output Signal
VQ
Enabling point for releasing output: B1-B2<BENRP. Next zero crossing switches the output OFF
(VQ=HIGH).
Enabling point for operate point: B1-B2>BENOP. Next zero crossing switches the output ON
(VQ=LOW).
BHYS=|BENOP-BENRP
|
Outside of a permanent magnet the magnetic induction (=flux density)
points from north to the south pole. It is common to define positive flux
if the south pole of a magnet is on the branded side of the IC. This is equivalent to the north pole of
the magnet on the rear side of the IC.
Figure 11
System operation with hidden hysteresis
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Electro Magnetic Compatibility
4
Electro Magnetic Compatibility
Note: Values depend on RSeries
!
Ref. ISO 7637-2, 2nd edition 06/2004, test circuit of Figure 12, conducted on supply line. BPP = 10mT (ideal
sinusoidal signal), VS=13.5V ± 0.5V, fB= 1000Hz, T= 25°C, RSeries ≥ 200
ISO 7637-2
Parameter
Symbol
Level/Type
IV / -100V
IV / 50V
Status
Test pulse 1
Test pulse 2a
Test pulse 2b
Test pulse 3a
Test pulse 3b
Test pulse 5a
Test pulse 5b
VEMC
C
C
IV / 10V
C
IV / -150V
IV / 100V
IV / 86.5V
IV / 86.5V
A16
A16
C
A17
Note: Test criteria for status A: No missing pulse no additional pulse on the IC output signal plus duty cycle
and jitter are in the specification limits
Test criteria for status B: No missing pulse no additional pulse on the IC output signal.
(Output signal “OFF” means switching to the voltage of the pull-up resistor).
Test criteria for status C: One or more parameter can be out of specification during the
exposure but returns automatically to normal operation after exposure is removed.
Test criteria for status E: IC destroyed
Ref. ISO 7637-3, 1st edition 11/1995, test circuit of Figure 12, coupling clamp.
BPP = 10mT (ideal sinusoidal signal), VS=13.5V ± 0.5V, fB= 1000Hz, T= 25°C, RSeries ≥ 200.
ISO 7637-3
Parameter
Symbol
Level/Type
IV / -60V
Status
A16
A16
Test pulse 3a
Test pulse 3b
VEMC
IV / 40V
Ref. ISO 11452-3, test circuit of Figure 12, measured in TEM-cell.
BPP = 4mT (ideal sinusoidal signal), VS=13.5V ± 0.5V, fB= 200Hz, T= 25°C, RSeries ≥ 200.
ISO 11452-3
Parameter
Symbol
Level/Type
Status
EMC field strength
ETEM-Cell
IV / 200V/m
AM=80%, f=1kHz
Note: Stresses above those listed here may cause permanent damage to the device. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability. Test condition for the
trigger window: fB-field=200Hz, Bpp=4mT, vertical limits are ± 10 % of VQ and horizontal limits are ±200µs
16 Output signal overlayed by burst pulse
17 Suppressed Us* = 35 V
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Electro Magnetic Compatibility
Figure 12
Test Circuit of EMC Tests
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Package Information
5
Package Information
Pure tin covering (green lead plating) is used. 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. Please refer to your key account team or regional sales if your need further information
Figure 13
PG-SSO-3-92 (Plastic Green Single Small Outline)
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Package Information
Figure 14
Hall probe spacing in the PG-SSO-3-92 package
Figure 15
Tape Loading Orientation in the PG-SSO-3-92 package
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Package Information
Appendix:
Calculation of mechanical errors
Figure 16
Systematic Phase Error
The systematic error comes in because of the delay-time between the threshold point and the time when the
output is switching. It can be calculated as follows:
360• n
=
•td
60
n
td
... systematic phase error in °
... speed of the camshaft-wheel in min-1
... delay time (see specification) in sec
Figure 17
Systematic Phase Error
The stochastic phase error includes the error due to the variation of the delay time with temperature and the
error caused by the resolution of the threshold. It can be calculated in the following way:
360• n
d =
• td
60
d
n
… stochastic phase error due to the variation of the delay time over temperature in °
… speed of the camshaft wheel in min-1
td
… variation of delay time over temperature in sec
Figure 18
Stochastic Phase Error
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Package Information
Jitter (Repeatability)
Figure 19
Phase Jitter
The phase jitter is normally caused by the analogue system noise. If there is an update of the offset-DAC due to
the algorithm, what could happen after each tooth, then an additional step in the phase occurs (see description
of the algorithm). This is not included in the following calculations. The noise is transformed through the slope
of the magnetic edge into a phase error. The phase jitter is determined by the two formulas:
B
(
)
Jitter_ typ
=
=
• Bneff _ typ
B
(
)
Jitter_ max
• Bneff _ max
Jitter_typ
...
...
...
typical phase jitter at Tj=25°C in ° (1Sigma)
maximum phase jitter at Tj=175°C in ° (3Sigma)
inverse of the magnetic slope of the edge in °/T
Jitter_max
B
Bneff_typ
Bneff_max
...
...
typical value of Bdiff in T (1-value at Tj=25°C)
maximum value of Bdiff in T (3-value at Tj=175°C)
Figure 20
Phase Jitter Calculation
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Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Package Information
Example
Assumption: n = 4500 min-1
td = 14 µs
td = ±3 µs
B
= 3 mT/°
Bneff_typ = ±40 µT (1-value at Tj=25°C)
Bneff_max = ±210 µT (3-value at Tj=175°C)
Calculation:
= 0.378°
...
...
...
systematic phase error
stochastic phase error due to delay time variation
typical phase jitter (1-value at Tj=25°C)
d = ±0.081°
Jitter_typ = ±0.013°
Jitter_max = ±0.07°
...
maximum phase jitter (3-value at Tj=175°C)
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Revision 1.0
2022-05-10
Data Sheet
TLE4927C
Dynamic Differential Hall Effect Sensor
Revision history
Revision history
Document
version
Date of release
Description of changes
1.0
2022-05-10
Initial release. Document integration of “Data sheet TLE4926C-HT
E6547 version 1.1” (Sensor reference type) and “Data sheet supplement
TLE4927C E6547 version 1.0”. Editorial changes.
24 of 25
Revision 1.0
2022-05-10
Data Sheet
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