TLE4997E2 [INFINEON]
The Infineon linear Hall IC TLE4997has been designed specifically to meet the demands of highly accurate rotation and position detection, as well as for current measurement applications. The sensor provides a ratiometric analog output voltage, which is ideally suited to Analog-to-Digital (A/D) conversion with the supply voltage as a reference. The IC is produced in BiCMOS technology with high voltage capability and also provides reverse polarity protection. Digital signal processing using a 16-bit DSP architecture and digital temperature compensation guarantees excellent stability over a long period of time. The minimum overall resolution is 12 bits. Nevertheless, some internal stages work with resolutions up to 20 bits.;
| 型号： | TLE4997E2 |
| 厂家： | 
Infineon |
| 描述： | The Infineon linear Hall IC TLE4997has been designed specifically to meet the demands of highly accurate rotation and position detection, as well as for current measurement applications. The sensor provides a ratiometric analog output voltage, which is ideally suited to Analog-to-Digital (A/D) conversion with the supply voltage as a reference. The IC is produced in BiCMOS technology with high voltage capability and also provides reverse polarity protection. Digital signal processing using a 16-bit DSP architecture and digital temperature compensation guarantees excellent stability over a long period of time. The minimum overall resolution is 12 bits. Nevertheless, some internal stages work with resolutions up to 20 bits. 输出元件 传感器 换能器 |
| 文件： | 总34页 (文件大小：1368K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Data Sheet, V 2.10, April 2020
TLE4997E2
Programmable Linear Hall Sensor
Sensors
N e v e r s t o p t h i n k i n g .
Edition 2020-04
Published by Infineon Technologies AG,
Am Campeon 1-12,
85579 Neubiberg, Germany
© Infineon Technologies AG 2020.
All Rights Reserved.
Attention please!
The information herein is given to describe certain components and shall not be considered as a guarantee of
characteristics.
Terms of delivery and rights to technical change reserved.
We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding
circuits, descriptions and charts stated herein.
Information
For further information on technology, delivery terms and conditions and prices please contact your 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 your nearest Infineon Technologies Office.
Infineon Technologies Components may only be used in life-support devices or systems 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 affect the safety or effectiveness of that device or system. Life support
devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain
and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may
be endangered.
TLE4997E2
Revision History:
2020-04
V 2.10
Previous Version: V 2.09, January 2018
Page
All
Subjects (major changes since last revision)
Updated product name to TLE4997E2
Table 5: removed unintended content
16
We Listen to Your Comments
Any information within this document that you feel is wrong, unclear or missing at all?
Your feedback will help us to continuously improve the quality of this document.
Please send your proposal (including a reference to this document) to:
sensors@infineon.com
TLE4997E2
Page
Table of Contents
1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Target Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.1
1.2
1.3
2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Further Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Transfer Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1
2.2
2.3
2.4
2.5
3
4
5
Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electrical and Magnetic Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6
Signal Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Magnetic Field Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Gain Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Offset Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
DSP Input Low Pass Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
DAC Input Interpolation Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Clamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1
6.2
6.3
6.4
6.5
6.6
7
Error Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Voltages Outside the Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Open Circuit of Supply Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Not Correctable EEPROM Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.1
7.2
7.3
8
Temperature Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.1
Parameter Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Calibration Data Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Programming Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Laboratory Evaluation Programmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.1
9.2
9.3
10
11
Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Data Sheet
4
V 2.10, 2020-04
TLE4997E2
Page
List of Figures
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Pin Configuration and Hall Cell Location . . . . . . . . . . . . . . . . . . . . . . . . 8
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Examples of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Ratiometry Error Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Signal Processing Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
DSP Input Filter (Magnitude Plot) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
DAC Input Filter (Magnitude Plot) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Clamping Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
EEPROM Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
PG-SSO-3-10 (Plastic Green Single Small Outline Package) . . . . . . . 33
Data Sheet
5
V 2.10, 2020-04
TLE4997E2
Page
List of Tables
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9
Table 10
Table 11
Table 12
Table 13
Table 14
Table 15
Table 16
Table 17
Table 18
Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Magnetic Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Range Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Low Pass Filter Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Low Pass Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Clamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Undervoltage and Overvoltage (All values with RL ≥ 10k). . . . . . . . . . 25
Open Circuit (OBD Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
EEPROM Error Signalling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Temperature Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Calibration Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Programming Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Data Sheet
6
V 2.10, 2020-04
Programmable Linear Hall Sensor
TLE4997E2
1
Overview
1.1
Features
• High linear and ratiometric push-pull rail-to-rail output
signal
• 20-bit Digital Signal Processing
• Digital temperature compensation
• 12-bit overall resolution
• Operates from -40°C up to 150°C
• Low drift of output signal over temperature and lifetime
• Programmable parameters stored in EEPROM with single bit error correction:
– magnetic range and magnetic sensitivity (gain)
– zero field voltage (offset)
– bandwidth
– polarity of the output slope
– clamping option
– temperature coefficient for all common magnets
– memory lock
• Re-programmable until memory lock
• Single supply voltage 4.5 - 5.5 V (4 - 7 V in extended range)
• Operation between -200 mT and +200 mT within three ranges
• Slim 3-pin package (Green)
• Reverse polarity and overvoltage protection for all pins
• Output short circuit protection
• On-board diagnostics (wire breakage detection, undervoltage, overvoltage)
• Digital readout of internal temperature and magnetic field values in calibration mode.
• Individual programming and operation of multiple sensors with common power supply
• Two-point calibration of magnetic transfer function
• Precise calibration without iteration steps
• High immunity against mechanical stress, EMC, ESD
Type
Marking
Ordering Code
Package
TLE4997
4997E2
SP000235288
PG-SSO-3-10
Data Sheet
7
V 2.10, 2020-04
TLE4997E2
Overview
1.2
Target Applications
• Robust replacement of potentiometers
– No mechanical abrasion
– Resistant to humidity, temperature, pollution and vibration
• Linear and angular position sensing in automotive applications like pedal position,
suspension control, valve or throttle position, headlight levelling and steering angle
• High current sensing for battery management, motor control, and electronic fuse
1.3
Pin Configuration
Figure 1 shows the location of the Hall element in the chip and the distance between the
Hall probe and the surface of the package.
±0.05
±0.1
0.38
2.03
Center of
Hall Probe
Branded Side
Hall-Probe
1
2
3
AEP03717
Figure 1
Pin Configuration and Hall Cell Location
Pin Definitions and Functions
Table 1
Pin No.
Symbol
Function
1
2
3
Supply voltage / programming interface
Ground
V
DD
GND
OUT
Output voltage / programming interface
Data Sheet
8
V 2.10, 2020-04
TLE4997E2
General
2
General
2.1
Block Diagram
Figure 2 shows a simplified block diagram.
VDD
Interface
Supply
Bias
EEPROM
enable
A
A
D
HALL
OUT
D
D
A
VDD
DSP
Temp.
Sense
OBD
GND
ROM
Figure 2
2.2
Block Diagram
Functional Description
The linear Hall IC TLE4997E2has been designed specifically to meet the demands of
highly accurate rotation and position detection, as well as for current measurement
applications.
The sensor provides a ratiometric analog output voltage, which is ideally suited to
Analog-to-Digital (A/D) conversion with the supply voltage as a reference.
The IC is produced in BiCMOS technology with high voltage capability and also provides
reverse polarity protection.
Digital signal processing using a 16-bit DSP architecture and digital temperature
compensation guarantees excellent stability over a long period of time.
The minimum overall resolution is 12 bits. Nevertheless, some internal stages work with
resolutions up to 20 bits.
Data Sheet
9
V 2.10, 2020-04
TLE4997E2
General
2.3
Principle of Operation
• A magnetic flux is measured by a Hall-effect cell.
• The output signal from the Hall-effect cell is converted from Analog to Digital signals.
• The chopped Hall-effect cell and continuous-time A to D conversion provide very low
and stable magnetic offset.
• A programmable Low-Pass filter reduces the noise.
• The temperature is measured and A to D converted.
• Temperature compensation is processed digitally using a second order function.
• Digital processing of output voltage is based on zero field and sensitivity value.
• The output voltage range can be clamped by digital limiters.
• The final output value is D to A converted.
• The output voltage is proportional to the supply voltage (ratiometric DAC).
• An On-Board-Diagnostics (OBD) circuit connects the output to VDD
or GND in case of errors.
2.4
Further Notes
Product qualification is based on “AEC Q100” (Automotive Electronics Council - Stress
test qualification for integrated circuits).
Data Sheet
10
V 2.10, 2020-04
TLE4997E2
General
2.5
Transfer Functions
The examples in Figure 3 show how easily different magnetic field ranges can be
mapped to the output voltage.
• Polarity Mode:
– Unipolar: Only North- or South-oriented magnetic fields are measured.
– Bipolar: Magnetic fields can be measured in both orientations.
The limit points must not be symmetric to the zero field point.
• Inversion: The gain values can be set positive or negative.
V
OUT (V)
5 200
VOUT (V)
5
B (mT)
50
VOUT (V)
5
B (mT)
100
B (mT)
0
0
0
0
VOUT
0
0
VOUT
-50
-100
-200
Example 1:
- Bipolar
Example 2:
- Unipolar
- Big offset
Example 3:
- Bipolar
- Inverted (neg. gain)
- Output for 3.3 V
Examples of Operation
Figure 3
Note: Due to the ratiometry, voltage drops at the VDD line are imaged in the output
signal.
Data Sheet
11
V 2.10, 2020-04
TLE4997E2
Maximum Ratings
3
Maximum Ratings
Table 2
Absolute Maximum Ratings
Parameter
Symbol
Limit Values
min. max.
-40 150
Unit Notes
Storage temperature
Junction temperature
TST
TJ
°C
°C
V
-40
170
For 96h 1)
4)
Voltage on VDD pins with VDD
-20 2)
20 3)
R
≤ 150 K/W
THja
respect to ground (VSS
)
Supply current
@ overvoltage
IDDov
-
52
-
mA
mA
V
Supply current
@ reverse voltage
Voltage on output pin with VOUTov -16 5)
IDDrev
- 75
16 3)
RTHja ≤ 150 K/W
respect to ground (VSS
)
Vout may be > VDD
Magnetic field
BMAX
-
-
unlimited
4.0
T
ESD protection
kV
According HBM
V
ESD
JESD22-A114-B 6)
1)
For limited time only. Depends on customer temperature lifetime cycles. Please ask for support by Infineon.
2)
max 24 h @ -50°C ≤ Ta < 30°C
max 10 min. @ 30°C ≤ Ta < 80°C
max 30 sec. @ 80°C ≤ Ta < 125°C
max 15 sec. @ 125°C ≤ Ta ≤ 150°C.
3)
4)
5)
6)
max. 24 h @ TJ < 80°C.
Guaranteed by laboratory characterization, tested at ±18V.
Max. 1 ms @ TJ < 30°C; -8.5 V for 100 h @ TJ < 80°C.
100 pF and 1.5 kΩ
Note: Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in
the operational sections of this specification is not implied. Furthermore, only
single error cases are assumed. More than one stress/error case may also
damage the device.
Exposure to absolute maximum rating conditions for extended periods may affect
device reliability. During absolute maximum rating overload conditions (VIN > VDD
or VIN < VSS) the voltage on VDD pins with respect to ground (VSS) must not
exceed the values defined by the absolute maximum ratings.
Data Sheet
12
V 2.10, 2020-04
TLE4997E2
Operating Range
4
Operating Range
The following operating conditions must not be exceeded in order to ensure correct
operation of the TLE4997E2. All parameters specified in the following sections of this
document refer to these operating conditions, unless otherwise indicated.
Table 3
Operating Range
Symbol Limit Values
min. max.
Parameter
Unit
Notes
Supply voltage
VDD
4.5
4
5.5
7
V
V
Extended range 1)
2)
Output current
IOUT
RL
-1
1
mA
kΩ
Load resistance
10
10
-
-
Pull-down to GND
Pull-up to VDD
Load capacitance
Junction temperature 3) TJ
CL
0
210
nF
°C
-40
125
150
For 5000h
For 1000h4) 5)
Useful lifetime
tLive
-
16
years
1)
For reduced output accuracy.
2)
For V
within the range of 5% ... 95% of V
.
OUT
DD
3)
4)
5)
RTHja ≤ 150 K/W.
For reduced magnetic accuracy.
Not additive.
Note: Keeping signal levels within the limits specified in this table ensures operation
without overload conditions.
Data Sheet
13
V 2.10, 2020-04
TLE4997E2
Electrical and Magnetic Parameters
5
Electrical and Magnetic Parameters
Table 4
Electrical Characteristics
Symbol Limit Values
min. typ. max.
Parameter
Unit
Notes
Output voltage range
VOUT
5
6
-
95
94
% of
VDD
For TA ≤ 120°C
For TA > 120°C
1)
Supply current
IDD
3
7.5 10
mA
mA
Output current @ OUT
shorted to supply lines
IOUTsh -30
-
30
For operating supply
voltage range only
2)
Zero field voltage
VZERO -100
ΔVZERO -10
-10
-
-
-
100
10
%
Of VDD
Zero field voltage drift
mV
mV
In lifetime 3)
Error band ov. temp.3)
10
4)5)
Ratiometry error
ERAT
RthJA
RthJC
tPon
-0.25 -
+0.25 %
Of VDD
Thermal resistance
-
-
-
-
-
-
219 K/W
Junction to air
47
K/W
ms
Junction to case
Power on time
1
Δ VOUT ≤ ± 5% of VDD
Δ VOUT ≤ ± 1% of VDD
10
Power On Reset level
VDDpon
2
-
4
V
Output DAC quantization ΔVOUT
Output DAC resolution
Output DAC bandwidth fDAC
1.22
mV
bit
@ VDD = 5 V
-
12
-
3.2
-
kHz
Interpolation filter 6)
Output noise
Vnoise
DNL
tDS
-
-
-
-
4.68 mVpp 5% exceeded 7)8)
Differential non-linearity
-1
-
1
LSB
Of output DAC
@ 100 Hz 9)
Signal delay
250 µs
1)
Also in extended V range. For V
within the range of 5%... 95% of V , I
= 0mA.
DD
OUT
DD OUT
2)
3)
Programmable in steps of 1.22 mV ( @ VDD = 5V ).
For Sensitivity S ≤ 25 mV/mT. For higher sensitivities the magnetic offset drift is dominant. This means that for
the precalibrated (typical) 60mV/mT sensitivity the typical output drift might be given due to the allowed
magnetic offset tolerence up to ±0.4mT x 60 mV/mT = ±24 mV.
4)
5)
6)
7)
8)
9)
For 4.5 V≤VDD≤5.5 V and within nominal V
range; see “Ratiometry” on Page 15 for details on E
.
RAT
OUT
For the maximum error in the extended voltage range, see “Ratiometry” on Page 15.
More information, see “DAC Input Interpolation Filter” on Page 22.
100 mT range, sensitivity 60 mV/mT, LP-filter 244 Hz, 160 Hz external RC low pass filter as application circuit.
’5% exceeded’ means that 5 of 100 continuously measured V samples are out of limit.
OUT
A sinusoidal magnetic field is applied, VOUT shows amplitude of 20% of VDD, no LP filter is selected.
Data Sheet
14
V 2.10, 2020-04
TLE4997E2
Electrical and Magnetic Parameters
Ratiometry
The linear Hall sensor works like a potentiometer. The output voltage is proportional to
the supply voltage. The division factor depends on the magnetic field strength. This
behavior is called “ratiometric”’.
The supply voltage VDD should be used as the reference for the A/D Converter of the
microcontroller. In this case, variations of VDD are compensated.
The ratiometry error is defined as follows:
V
OUT(VDD
)
VOUT(5V)
æ
ç
è
ö
÷
ø
------------------------------ --------------------------
ERAT
=
–
× 100 %
5V
VDD
The ratiometry error band displays as a “Butterfly Curve”.
%
1
ERAT
0.75
0.5
0.25
0
-0.25
-0.5
-0.75
-1
4
5
6
7
V
VDD
Figure 4
Ratiometry Error Band
Note: Take care of possible voltage drops on the VDD and VOUT line degrading the
result. Ideally, both values are acquired and their ratio is calculated to gain the
highest accuracy. This method should be used especially during calibration.
Data Sheet
15
V 2.10, 2020-04
TLE4997E2
Electrical and Magnetic Parameters
Calculation of the Junction Temperature
The total power dissipation PTOT of the chip increases its temperature above the ambient
temperature. The power multiplied with the total thermal resistance R (Junction to
thJA
Ambient) leads to the final junction temperature. R
is the sum of the addition of the
thJA
values of the two components Junction to Case and Case to Ambient.
R
= RthJC + RthCA
thJA
TJ = TA + ΔT
ΔT = R x PTOT = R
x ( V x I + V
x I )
OUT
I
, I
> 0, if direction is into IC
DD OUT
thJA
thJA
DD
DD
OUT
Example (assuming no noticeable load on Vout):
– VDD = 5 V
– IDD = 10 mA
– ΔT = 219 [K/W] x (5 [V] x 0.01 [A] + 0 [VA]) = 11 K
For moulded sensors, the calculation with RthJC is more adequate.
Magnetic Parameters
Table 5
Magnetic Characteristics
Symbol Limit Values
Parameter
Unit
Notes
min. typ.
max.
1)
Sensitivity
± 12.5 -
± 300 mV/mT
S
Magnetic field range
Integral nonlinearity
Magnetic offset
± 50
-15
± 1002) ± 200 mT
Programmable 3)
MFR
INL
BOS
ΔBOS
4)
-
-
-
15
400
5
mV
= ± 0.3% of VDD
5) 6) 7)
-400
- 5
μT
Magnetic offset drift
μT / °C Error band 7)
1)
Programmable in steps of 0.024%, @ VDD = 5 V and TJ = 25°C
2)
3)
4)
This range is also used for temperature and offset pre-calibration of the IC.
Depending on the Offset and Gain settings, the output may saturate at lower fields.
INL = Vout - Vout,lse with Vout,lse = least square error fit of Vout. Valid in the range (5% of VDD) < VOUT < (95% of
VDD) for T ≤ 120°C and (6% of VDD) < VOUT < (94% of VDD) for 120°C < T ≤ 150°C
J
J
5)
6)
7)
In operating temperature range and over lifetime.
For Sensitivity S > 25 mV / mT. For lower sensitivities, the zero field voltage drift is dominant.
Measured at ± 100 mT range.
Data Sheet
16
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TLE4997E2
Signal Processing
6
Signal Processing
The flow diagram in Figure 5 shows the data processing algorithm.
Range
LP
Gain
Limiter
(Clamp)
Hall
Sensor
A
D
D
out
X
+
A
X
LPDAC
Offset
Temperature
Sensor
TC2
X
X
A
1
+
+
D
X
TC1
-T0
Stored in
EEPROM
Memory
Temperature
Compensation
Figure 5
Signal Processing Flow
Magnetic Field Path
• The analog output signal of the chopped Hall cell is converted in the continuous-time
A/D Converter. The range of the chopped A/D Converter can bet set in several steps
(see Table 6). This assures a suitable level for the A/D Converter.
• After the A/D conversion, a digital low pass filter reduces the bandwidth (Table 10).
• A multiplier amplifies the value according to the gain setting (see Table 8) plus
temperature compensation.
• The offset value is added (see Table 9).
• A limiter reduces the resulting signal to 12 bits and feeds the D/A converter.
Temperature Compensation
(Details are listed in Chapter 8)
• The output signal of the temperature cell is also A/D converted.
• The temperature is normalized by subtraction of the T0 value (zero point of the
quadratic function).
• The linear path is multiplied with the TC1 value.
Data Sheet
17
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TLE4997E2
Signal Processing
• In the quadratic path, the difference temperature is squared and multiplied with the
TC2 value.
• Both path outputs are added together to the gain value from the EEPROM.
6.1
Magnetic Field Ranges
The working range of the magnetic field defines the input range of the A/D Converter. It
is always symmetric to the zero field point. Any two points in the magnetic range can be
selected to be the end points of the output curve. The output voltage represents the
range between the two points.
In the case of fields higher than the range values, the output signal may be distorted.
The range must be set before the calibration of offset and gain.
Table 6
Range
Low
Range Setting
Range in mT
± 50
Parameter R
3
1
0
Mid
± 100
High
± 200
Table 7
Range
Parameter
Symbol Limit Values
min. max.
Unit
Notes
1)
Register size
2
bit
R
1)
Ranges do not have a guaranteed absolute accuracy. The temperature pre-calibration is performed in the mid
range (100 mT).
Data Sheet
18
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TLE4997E2
Signal Processing
6.2
Gain Setting
The sensitivity is defined by the range and the gain setting. The output of the A/D
Converter is multiplied with the gain value.
Table 8
Gain
Parameter
Symbol Limit Values
min. max.
Unit
Notes
Register size
Gain range
15
- 4.0 3.9998
244.14
bit
-
Unsigned integer value
1)2)
G
Gain
Gain quantization steps ΔGain
ppm
Corresponds to 1/4096
1)
For gain values between - 0.5 and + 0.5, the numeric accuracy decreases.
To obtain a flatter output curve, it is recommended to select a higher range setting.
2)
A gain value of +1.0 corresponds to a typical 40 mV/mT sensitivity (100 mT range, not guaranteed). Infineon
pre-calibrates the samples to 60mV/mT (100mT range) in the final test, but does not guarantee the accuracy
of this calibration. It is crucial to do a final calibration of each IC within the application using the Gain/V value.
OS
The gain value can be calculated by
:
(G – 16384)
-----------------------------
Gain =
4096
6.3
Offset Setting
The offset voltage corresponds to an output voltage with zero field at the sensor.
Table 9
Offset
Parameter
Symbol Limit Values
min. max.
Unit
Notes
Register size
Offset range
15
-400 399
1.22
bit
Unsigned integer value
1)
OS
VOS
ΔVOS
% VDD
mV
Offset quantization
steps
@ VDD = 5 V
generally VDD / 4095
1)
Infineon pre-calibrates the samples at zero field to 50% of V (100mT range) in the final test, but does not
DD
guarantee the accuracy of this calibration. It is crucial to do a final calibration of each IC within the application
using the Gain/V value.
OS
The offset value can be calculated by:
(OS – 16384)
---------------------------------
× VDD
VOS
=
4096
Data Sheet
19
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TLE4997E2
Signal Processing
6.4
DSP Input Low Pass Filter
A digital Low Pass Filter is placed between the Hall A/D Converter and the DSP to
reduce the noise level. The Low Pass filter has a constant DC amplification of 0 dB (this
is exactly a gain of 1), which means that its setting has no influence on the internal Hall
A/D Converter value.
The bandwidth can be set in 8 steps.
Table 10
Low Pass Filter Setting
Cutoff frequency in Hz (at 3dB attenuation)1)
Parameter LP
0
1
2
3
4
5
6
78
244
421
615
826
1060
1320
off 2)
7
1)
As this is a digital filter running with an RC-based oscillator, the cutoff frequency may vary within ±25%.
The output low pass-interpolation filter behavior remains as main component in the signal path.
2)
Table 11
Low Pass Filter
Symbol Limit Values
Parameter
Unit
Notes
min. max.
Register size
3
bit
%
LP
Corner frequency
variation
Δ f
- 25
+ 25
Note: In Low Pass filter setting 7 (filter off), the output noise increases. Because of
higher DSP load, the current consumption also rises slightly.
Data Sheet
20
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TLE4997E2
Signal Processing
Figure 6 shows the characteristic of the filter as a magnitude plot (the highest setting is
marked). The “off” position would be a flat 0 dB line. In this case, the output decimation
filter limits the bandwidth of the sensor. The update rate after the Low Pass filter is
16 kHz.
0
-1
-2
-3
-4
-5
-6
102
103
101
Frequency (Hz)
Figure 6
DSP Input Filter (Magnitude Plot)
Data Sheet
21
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TLE4997E2
Signal Processing
6.5
DAC Input Interpolation Filter
An interpolation filter is placed between the DSP and the output DAC. It cannot be
switched off. This filter limits the frequency behavior of the complete system if the DSP
input filter is disabled. The update rate after the interpolation filter is 256 kHz.
0
-1
-2
-3
-4
-5
-6
102
103
104
101
Frequency (Hz)
Figure 7
DAC Input Filter (Magnitude Plot)
Note: As this is a digital filter running with an RC-based oscillator, the cutoff frequency
may vary within ±25%.
Data Sheet
22
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TLE4997E2
Signal Processing
6.6
Clamping
The clamping function is useful for splitting the output voltage into the operating range
and error ranges. If the magnetic field is outside the selected measurement range, the
output voltage V is limited to the clamping values.
out
Table 12
Clamping
Parameter
Symbol Limit Values
min. max.
Unit
Notes
Register size
2 x 12
99.98
99.98
1.22
bit
CL,CH
1)
1)
Clamping voltage low VCLL
Clamping voltage high VCLH
0
0
% VDD
% VDD
mV
Clamping quantization ΔVCLQ
@ VDD = 5 V
steps
Clamping voltage drift ΔVCL
-15
-15
15
15
mV
in lifetime2)
over temperature2)
1)
If clamping is set, it must be within the allowed output voltage range to be effective.
2)
Valid in the range (5% of VDD) < VOUT < (95% of VDD) for T ≤ 120°C
J
and (6% of VDD) < VOUT < (94% of VDD) for 120°C < T ≤ 150°C
J
The clamping values are calculated by:
Clamping low voltage:
CL
4096
-----------
× VDD
VCLL
=
=
Clamping high voltage:
CH
-----------
VCLH
× VDD
4096
Note: For an exact setup, the register value may be re-adjusted due to the actual output
voltage in the clamping condition. The output voltage range itself has electrical
limits. See the Electrical Characteristics of V
.
out
Data Sheet
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TLE4997E2
Signal Processing
Figure 8 shows an example in which the magnetic field range between Bmin and Bmax
is mapped to voltages between 0.8 V and 4.2 V.
If it is not necessary to signal errors, the maximum output voltage range between 0.3 V
and 4.7 V can be used.
5
Vout (V)
Error range
VCLH
4
3
2
1
0
Operating range
VCLL
Error range
Bmin
Bmax
B (mT)
Figure 8
Clamping Example
Note: The high value must be above the low value.
If VCLL is set to a higher value than VCLH, the VCLH value is dominating. This would
lead to a constant output voltage independent of the magnetic field strength.
Data Sheet
24
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TLE4997E2
Error Detection
7
Error Detection
Different error cases can be detected by the On-Board-Diagnostics (OBD) and reported
to the microcontroller. The OBD is useful only when the clamping function is enabled. It
is important to set the clamping threshold values inside the error voltage values shown
in Table 13 and Table 14 to ensure that it is possible to distinguish between correct
output voltages and error signals.
7.1
Voltages Outside the Operating Range
The output signals error conditions, if VDD lies
• inside the ratings specified in Table 2 "Absolute Maximum Ratings" on Page 12
• outside the range specified in Table 3 "Operating Range" on Page 13.
Table 13
Undervoltage and Overvoltage (All values with RL ≥ 10k)
Parameter
Symbol Limit Values
Unit
Notes
min.
max.
Undervoltage threshold VDDuv
Overvoltage threshold VDDov
3
7
4
V
V
V
8.3
-
Output voltage
@ undervoltage
VOUTuv 0.95 x VDD
3V ≤ VDD ≤ VDDuv
Output voltage
@ overvoltage
VOUTov 0.97 x VDD
-
V
V
DDov < VDD ≤ 16 V
Supply current 1)
IDDuv
-
10
mA
@ undervoltage
1)
For overvoltage and reverse voltage, see Table 2 "Absolute Maximum Ratings" on Page 12.
7.2
Open Circuit of Supply Lines
In the case of interrupted supply lines, the data acquisition device can alert the user. If
two sensors are placed in parallel, the output of the remaining working sensor may be
still used for an emergency operation.
Table 14
Open Circuit (OBD Parameters) 1)
Parameter
Symbol Limit Values
Unit
Notes
min.
max.
Output voltage
@ open VDD line
VOUT
VOUT
0
0.18
0.2
V
V
TJ≤120°C
120°C < TJ ≤ 150°C
Output voltage
@ open GND line
4.82
4.8
5
TJ≤120°C
120°C < TJ ≤ 150°C
1)
With VDD = 5 V and RL ≥ 10 kΩ pull-down or RL ≥ 20 kΩ pull-up.
25
Data Sheet
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TLE4997E2
Error Detection
7.3
Not Correctable EEPROM Errors
The parity method is able to correct one single bit in one EEPROM line. One other single
bit error in another line can also be detected. As this situation is not correctable, this
status is signalled at the output pin by clamping the output value to VDD
.
Table 15
EEPROM Error Signalling
Symbol Limit Values
min. max.
Parameter
Unit
Notes
Output voltage @
EEPROM error
VOUT
0.97 x VDD VDD
V
Data Sheet
26
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TLE4997E2
Temperature Compensation
8
Temperature Compensation
The magnetic field strength of a magnet depends on the temperature. This material
constant is specific to different magnet types. Therefore, the TLE4997E2 offers a second
order temperature compensation polynomial, by which the Hall signal output is multiplied
in the DSP. There are three parameters for the compensation:
• Reference temperature T0
• A linear part (1st order) TC1
• A quadratic part (2nd order) TC2
The following formula describes the sensitivity dependent on the temperature in relation
to the sensitivity at the reference temperature T0:
S
TC(T) = 1 + TC1 × (T – T0) + TC2 × (T – T0)2
For more information, see also the signal processing flow in Figure 5.
The full temperature compensation of the complete system is done in two steps:
1. Pre-calibration in the Infineon final test.
The parameters TC1, TC2, T0 are set to maximally flat temperature characteristics
regarding the Hall probe and internal analog processing parts.
2. Overall System calibration.
The typical coefficients TC1, TC2, T0 of the magnetic circuitry are programmed. This
can be done deterministically, as the algorithm of the DSP is fully reproducible. The
final settings of the TC1, TC2, T0 values are relative to the pre-calibrated values.
Table 16
Temperature Compensation
Symbol Limit Values Unit
min. max.
Parameter
Notes
Register size TC1
-
9
bit
Unsigned integer values
TL
1)
1
st order coefficient TC1 TC1
Quantization steps of TC1 ΔTC1
Register size TC2
nd order coefficient TC2 TC2
Quantization steps of TC2 ΔTC2
-1000 2500 ppm/ °C
15.26
8
ppm/ °C
bit
-
Unsigned integer values
2)
TQ
2
- 4
4
ppm/ °C²
ppm/ °C²
bit
0.119
3
Register size T0
-
Unsigned integer values
TR
T0
Reference temperature
- 48
64
°C
3)
Quantization steps of T0 ΔT0
16
°C
1)
Full adjustable range: -2441 to +5355 ppm/°C, can be only used after confirmation by Infineon
Full adjustable range: -15 to +15 ppm/°C², can be only used after confirmation by Infineon
A quantization step of 1°C is handled by algorithm (See Application Note).
2)
3)
Data Sheet
27
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TLE4997E2
Temperature Compensation
8.1
Parameter Calculation
The parameters TC1, TC2 and T0 may be calculated by:
TL – 160
----------------------
65536
TC1
=
=
× 1000000
× 1000000
TQ – 128
-----------------------
TC2
8388608
T0 = 16TR – 48
Now the output VOUT for a given field BIN at a specific temperature can be roughly
calculated by:
B
æ
ç
è
ö
÷
IN
------------
VOUT
=
× STC × STCHall × S × V
+ V
OS
o
DDø
B
FSR
BFSR is the full range magnetic field. It is dependent on the range setting (e.g 100 mT).
So is the nominal sensitivity of the Hall probe times the Gain factor set in the EEPROM.
STC is the temperature-dependent sensitivity factor calculated by the DSP.
STCHall is the temperature behavior of the Hall probe.
The pre-calibration at Infineon is performed such that the following condition is met:
S
TC(TJ – T0) × STCHall(TJ) ≈ 1
Within the application, an additional factor BIN(T) / BIN(T0) will be given due to the
magnetic system. STC needs now to be modified to STCnew so that the following condition
is satisfied:
B
IN(T)
--------------------
× STCnew(T) × STCHall(T) ≈ STC(T) × STCHall(T) ≈ 1
B
IN(T0)
Therefore, the new sensitivity parameters STCnew can be calculated from the
pre-calibrated setup STC using the relation:
B
IN(T)
--------------------
× STCnew(T) ≈ STC(T)
B
IN(T0)
Data Sheet
28
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TLE4997E2
Calibration
9
Calibration
A special hardware interface to an external computing system and measurement
equipment is required for calibration of the sensor. All calibration and setup bits can be
written into a random access memory (RAM). This allows the EEPROM to remain
untouched during the entire calibration process. Therefore, this temporary setup (using
the RAM only) does not stress the EEPROM—and even allows a pre-verification1) of the
setup before programming—as the number of EEPROM programming cycles is limited
to provide a high data endurance.
The digital signal processing is completely deterministic. This allows a two point
calibration in one step without iterations. The two magnetic fields (here described as two
“positions” of an external magnetic circuitry) need to be applied only once. Furthermore,
a complete setup and calibration procedure can be performed requiring only one
EEPROM programming cycle at the end2).
After setting up the temperature coefficients, the calibrated Hall A/D Converter values of
both positions need to be read and the sensor output signals (using a DAC test mode)
need to be acquired for the corresponding end points. Using this data, the signal
processing parameters can be immediately calculated with a program running on the
external computing system.
Note: The calibration and programming process must be performed only at the
start of life of the device.
Table 17
Calibration Characteristics
Symbol Limit Values
min. max.
Parameter
Unit
Notes
Temperature of sensor at tCAL
2 point calibration and
programming
10
30
°C
2 point calibration
accuracy1)
ΔVCAL1 -10
ΔVCAL2 -10
10
10
mV
mV
Position 1
Position 2
1)
Setup and validation performed at start of life.
Note: Depending on the application and external instrumentation setup, the accuracy of
the 2 point calibration can be improved.
1)
This feature is not required for a deterministic two-point setup to fulfill the specification.
Details and basic algorithms for this step are available on request.
2)
Data Sheet
29
V 2.10, 2020-04
TLE4997E2
Calibration
9.1
Calibration Data Memory
When the MEMLOCK bits are programmed (two redundant bits), the memory contents
are frozen and may no longer be changed. Furthermore, the programming interface is
locked out and the chip remains in Application Mode only. This prevents accidental
programming due to environmental influences.
Column Parity Bits
User-Calibration Bits
Pre-Calibration Bits
Figure 9
EEPROM Map
A matrix parity architecture allows the automatic correction of any single bit error. Each
row is protected by a row parity bit. The sum of bits set including this bit must be an odd
number (ODD PARITY). Each column is additionally protected by a column parity bit.
The sum of all the bits in the even positions (0, 2, etc.) of all lines must be an even
number (EVEN PARITY); the sum of all the bits in the odd positions (1,3, etc.) must be
an odd number (ODD PARITY). This mechanism of different parity calculations protects
against many block errors (such as erasing a full line or even the entire EEPROM).
When modifying the application bits (such as Gain, Offset, TC, etc.) the parity bits must
be updated. For the column bits, the pre-calibration area must be also read out and
considered for correct parity generation.
Note: A specific programming algorithm must be followed to ensure the data retention.
A separate detailed programming specification is available on request.
Data Sheet
30
V 2.10, 2020-04
TLE4997E2
Calibration
Table 18
Programming Characteristics
Symbol Limit Values
Parameter
Unit
Notes
min.
max.
Number of EEPROM
programming cycles
NPRG
-
10
Cycles Programming allowed
1)
only at start of lifetime
Ambient temperature at TPRG
10
30
°C
programming
Programming time
Calibration memory
tPRG
100
-
ms
Bit
Bit
For complete memory 2)
All active EEPROM bits
All parity EEPROM bits
135
25
-
-
Error correction
1)
1 cycle is the simultaneous change of ≥ 1 bit.
2)
Depending on clock frequency at VDD, write pulse 10ms ±1%, erase pulse 80ms ±1%.
9.2
Programming Interface
The supply pin and the output pin are used as two-wire interface to transmit the
EEPROM data to and from the sensor.
This allows
• communication with high data reliability
• bus-type connection of several sensors
In many applications, two sensors are used to measure the same parameter. This
redundancy allows the operation to continue in an emergency mode. If both sensors use
the same power supply lines, they can be programmed together in parallel.
The data transfer protocol and programming is described in a separate document
(TLE4997 Programming Guide).
9.3
Laboratory Evaluation Programmer
For the programming of evaluation samples and QA (quality assurance) samples a
programming equipment is available on request.
Data Sheet
31
V 2.10, 2020-04
TLE4997E2
Application Circuit
10
Application Circuit
Figure 10 shows the connection of multiple sensors to a microcontroller.
Ref
Voltage Tracker
e.g.
TLE4250
ADCref
ADCin1
VDD
10k
TLE
4997out
GND
47nF
47nF
100 nF
10k 100 nF
ADCin2
ADCGND
µC
optional
VDD
10k
TLE
4997out
GND
47nF
47nF
100 nF
10k 100 nF
Figure 10
Application Circuit
Note: For calibration and programming, the interface must be connected directly to the
output pin.
The given application circuit must be regarded as only an example. It needs to be
adapted according to the requirements of the specific application.
Data Sheet
32
V 2.10, 2020-04
TLE4997E2
Package Outlines
11
Package Outlines
45˚
5˚
±0.05
4.06
2 A
B
±0.05
1.5
1.5
±0.1
0.5
±0.05
±0.05
0.82
0.36
3x
±0.05
0.42
0.5 B
1
2
3
2 x 1.27 = 2.54
±1
12.7
2
C
C
A
Adhesive
Tape
Tape
±0.3
±0.4
4
0.25-0.15
6.35
±0.1
±0.3
0.39
12.7
Total tolerance at 19 pitches ±1
1) No solder function area
Molded body dimensions do not unclude plastic or metal protrusion of 0.15 max per side
P-PG-SSO-3-10-PO V02
Figure 11
PG-SSO-3-10 (Plastic Green Single Small Outline Package)
Data Sheet
33
V 2.10, 2020-04
w w w . i n f i n e o n . c o m
Published by Infineon Technologies AG
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