Data Sheet, V 1.1, January 2008
TLE4921-5U
Dynamic Differential Hall Effect Sensor IC
Sensors
Never stop thinking.
Edition 2008-01
Published by Infineon Technologies AG,
St.-Martin-Strasse 53,
81669 München, Germany
© Infineon Technologies AG 2008.
All Rights Reserved.
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Template: mc_a5_ds_tmplt.fm / 4 / 2004-09-15
TLE4921-5U
Revision History: 2008-01 V 1.1
Previous Version: V1.0
Page Subjects (major changes since last revision)
5Ordering Code changed
11 “Output leakage current” unit corrected
20 Figures “Delay Time between Switching Threshold” exchanged and
corrected
21 Figure “Delay Time versus Differential Field” corrected
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Any information within this document that you feel is wrong, unclear or missing at all?
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TLE4921-5U
Table of Contents Page
Data Sheet 4 V 1.1, 2008-01
1Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Pin Configuration
(view on branded side of component) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Circuit Description (see Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 Electrical and Magnetic Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Application Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Typical Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8 Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Type Marking Ordering Code Package
TLE4921-5U 215U SP000013593 PG-SSO-4-1
TLE4921-5UDynamic Differential Hall Effect Sensor IC
Data Sheet 5 V 1.1, 2008-01
Bipolar IC
1 Overview
1.1 Features
• Advanced performance
• High sensitivity
• Symmetrical thresholds
• High piezo resistivity
• Reduced power consumption
• South and north pole pre-induction possible
• AC coupled
• Digital output signal
• Two-wire and three-wire configuration possible
• Large temperature range
• Large airgap
• Low cut-off frequency
• Protection against overvoltage
• Protection against reversed polarity
• Output protection against electrical disturbances
The differential Hall Effect sensor TLE4921-5U provides a high sensitivity and a superior
stability over temperature and symmetrical thresholds in order to achieve a stable duty
cycle. TLE4921-5U is particularly suitable for rotational speed detection and timing
applications of ferromagnetic toothed wheels such as anti-lock braking systems,
transmissions, crankshafts, etc. The integrated circuit (based on Hall effect) provides a
digital signal output with frequency proportional to the speed of rotation. Unlike other
rotational sensors differential Hall ICs are not influenced by radial vibration within the
effective airgap of the sensor and require no external signal processing.
TLE4921-5U
Overview
Data Sheet 6 V 1.1, 2008-01
1.2 Pin Configuration
(view on branded side of component)
Figure 1
Table 1 Pin Definitions and Functions
Pin No. Symbol Function
1VSSupply voltage
2 Q Output
3GND Ground
4CCapacitor
AEP01694
Q
2
GND
3
C
4
V
S
1
Center of
sensitive are
a
2.67
2.5
1.53
BBA 0.2
A0.2
TLE4921-5U
General
Data Sheet 7 V 1.1, 2008-01
2 General
2.1 Block Diagram
Figure 2 Block Diagram
AEB01695
Schmitt-
Trigger
Amplifier Highpass-
Filter
Hall-Probes
V
(3V)
Protection
Device Internal Reference and Supply
1
V
S
2
Q
4
C
Open
Collector Protection
Device
GND
REG
3
F
TLE4921-5U
General
Data Sheet 8 V 1.1, 2008-01
2.2 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).
Using an external capacitor the generated Hall voltage signal is slowly adjusted via an
active high pass filter with a low cut-off frequency. This causes the output to switch into
a biased mode after a time constant is elapsed. The time constant is determined by the
external capacitor. Filtering avoids ageing and temperature influence from Schmitt-
trigger input and eliminates device and magnetic offset.
The TLE4921-5U can be exploited to detect toothed wheel rotation in a rough
environment. Jolts against the toothed wheel and ripple have no influence on the output
signal.
Furthermore, the TLE4921-5U can be operated in a two-wire as well as in a three-wire-
configuration.
The output is logic compatible by high/low levels regarding on and off.
2.3 Circuit Description (see Figure 2)
The TLE4921-5U is comprised of a supply voltage reference, a pair of Hall probes
spaced at 2.5 mm, differential amplifier, filter for offset compensation, Schmitt trigger,
and an open collector output.
The TLE4921-5U was designed to have a wide range of application parameter
variations. Differential fields up to ± 80 mT can be detected without influence to
the switching performance. The pre-induction field can either come from a
magnetic south or north pole, whereby the field strength up to 500 mT or more will
not influence the switching points. The improved temperature compensation
enables a superior sensitivity and accuracy over the temperature range. Finally
the optimized piezo compensation and the integrated dynamic offset
compensation enable easy manufacturing and elimination of magnet offsets.
Protection is provided at the input/supply (pin 1) for overvoltage and reverse polarity and
against over-stress such as load dump, etc., in accordance with ISO-TR 7637 and
DIN 40839. The output (pin 2) is protected against voltage peaks and electrical
disturbances.
TLE4921-5U
Maximum Ratings
Data Sheet 9 V 1.1, 2008-01
3 Maximum Ratings
Table 2 Absolute Maximum Ratings
Tj = -40°C to 150°C
Parameter Symbol Limit Values Unit Remarks
min. max.
Supply voltage VS-35 1)
1) Reverse current < 10 mA
30 V
Output voltage VQ-0.7 30 V
Output current IQ–50 mA
Output reverse
current
-IQ–50 mA
Capacitor
voltage
VC-0.3 3 V
Junction
temperature
Tj–150 °C 5000 h
–160 2500 h
–170 1000 h
–210 40 h
Storage
temperature
TS-40 150 °C
Thermal
resistance
PG-SSO-4-1
RthJA –190 K/W
Current through
input-protection
device
Current through
output-protection
device
ISZ
IQZ
–
–
200
200
mA
mA
t < 2 ms; v = 0.1
t < 2 ms; v = 0.1
TLE4921-5U
Operating Range
Data Sheet 10 V 1.1, 2008-01
4 Operating Range
Note: In the operating range the functions given in the circuit description are fulfilled.
Table 3 ESD Protection
Human Body Model (HBM) tests according to:
Standard EIA/JESD22-A114-B HBM
Parameter Symbol Limit Values Unit Remarks
min. max.
ESD - protection VESD –±2 kV
Table 4 Operating Range
Parameter Symbol Limit Values Unit Remarks
min. typ. max.
Supply voltage VS4.5 –24 V
Junction
temperature
Tj-40 –150 °C 5000 h
––160 2500 h
––170 1000 h
Pre-induction B0-500 –500 mT at Hall probe;
independent of
magnet orientation
Differential
induction
∆B-80 –80 mT
TLE4921-5U
Electrical and Magnetic Parameters
Data Sheet 11 V 1.1, 2008-01
5 Electrical and Magnetic Parameters
Table 5 Electrical Characteristics
Parameter Symbol Limit Values Unit Test
Condition
Test
Circuit
min. typ. max.
Supply current IS3.8
4.3
5.3
5.9
8.0
8.8
mA
mA
VQ = high
IQ = 0 mA
VQ = low
IQ = 40 mA
1
1
Output
saturation
voltage
VQSAT –0.25 0.6 VIQ = 40 mA 1
Output leakage
current
IQL ––50 µA VQ = 24 V 1
Center of
switching points:
(∆BOP + ∆BRP) / 2
∆Bm-1 01mT -20 mT < ∆B
< 20 mT 1) 2)
f = 200 Hz
2
Operate point ∆BOP ––0mT f = 200 Hz,
∆B = 20 mT
2
Release point ∆BRP 0––mT f = 200 Hz,
∆B = 20 mT
2
Hysteresis ∆BH0.5 1.5 2.5 mT f = 200 Hz,
∆B = 20 mT
2
Overvoltage
protection
at supply voltage
at output
VSZ
VQZ
27
27
–
–
35
35
V
V
IS = 16 mA
IQ = 16 mA
1
1
Output rise time tr––0.5 µsIQ = 40 mA
CL = 10 pF
1
Output fall time tf––0.5 µsIQ = 40 mA
CL = 10 pF
1
Delay time tdop
tdrp
tdop - tdrp
–
–
–
–
–
0
25
10
15
µs
µs
µs
f = 10 kHz
∆B = 5 mT
2
Filter input
resistance
RC35 43 52 kΩ25°C ±2°C 1
TLE4921-5U
Electrical and Magnetic Parameters
Data Sheet 12 V 1.1, 2008-01
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.
Filter sensitivity
to ∆B
SC–-5 –
mV/mT
– 1
Filter bias
voltage
VC1.6 22.4 V∆B = 0 1
Frequency f 3) –20000 Hz ∆B = 5 mT 2
Resistivity
against
mechanical
stress (piezo)
∆Bm
∆BH
-0.1
-0.1
–
–
0.1
0.1
mT
mT
F = 2 N 2 4)
1) The Current consumption characteristic will be different and the specified values can slightly change
2) Leakage currents at pin 4 should be avoided. The bias shift of Bm caused by a leakage current IL can be
calculated by:
3) For higher ∆B the values may exceed the limits like following | ∆Bm | < | 0.05 × ∆B |
4) Depends on filter capacitor CF. The cut-off frequency is given by . The switching points are
guaranteed over the whole frequency range, but amplitude modification and phase shift due to the 1st order
highpass filter have to be taken into account.
Table 5 Electrical Characteristics (cont’d)
Parameter Symbol Limit Values Unit Test
Condition
Test
Circuit
min. typ. max.
∆Bm
ILR×CT()
SCT()
-----------------------------
=
f
1
2πRC
×CF
×
---------------------------------
=
TLE4921-5U
Electrical and Magnetic Parameters
Data Sheet 13 V 1.1, 2008-01
Figure 3 Test Circuit 1
Figure 4 Test Circuit 2
2
Q
C
4
C
V
I
R
1) =
C∆
∆C
4.7 nF
C
VV
GND
3
AES0169
6
,
QSAT V
QZ CL
LD
V
P
VS
R300ΩSZ
V
1)
IC
1
S
V
IS
QR
IQ,I
RL
TLE4921-5U
AES0125
8
S
V
Q
GND
Q
V
2
1
4
3
1 k
BOP
BHy
∆
∆
f
V
SC
min
fmax
nF
Ω
470CF
TLE4921-5U
TLE4921-5U
Application Configurations
Data Sheet 14 V 1.1, 2008-01
6 Application Configurations
Two possible applications are shown in
Figure 7
and
Figure 8
(Toothed and Magnet Wheel).
The difference between two-wire and three-wire application is shown in Figure 9.
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 × 5 mm × 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 5 Sensor Spacing
Figure 6 Tooth Wheel Dimensions
b
La
N
S
AEA01259
a centered distance
of Hall probes
b Hall probes to
IC surface
LIC surface to
tooth wheel
a = 2.5 mm
b = 0.3 mm
d
T
AEA01260
DIN
ddiameter (mm)
znumber of teeth
mmodule m = d/z (mm)
Tpitch T = π × m (mm)
Conversion DIN – ASA
m= 25.4 mm/p
T= 25.4 mm CP
ASA
pdiameter pitch p= z/d (inch)
PD pitch diameter PD = z/p (inch)
CP circular pitch CP = 1 inch × π/p
TLE4921-5U
Application Configurations
Data Sheet 15 V 1.1, 2008-01
Figure 7 TLE4921-5U, with Ferromagnetic Toothed Wheel
Figure 8 TLE4921-5U, with Magnet Wheel
Signal
Circuitry
Processing
(S)N
(N)S
Hall Sensor 1
AEA01261
Permanent Magnet
Gear Wheel
Hall Sensor 2
Magnet Wheel
N
Processing
Circuitry
Signal
Hall Sensor 1
S
Hall Sensor 2
AEA0126
2
S
TLE4921-5U
Application Configurations
Data Sheet 16 V 1.1, 2008-01
Figure 9 Application Circuits
AES01263
S
V
GND QC
CF
2
1
3
S
V
VSIGNAL
Line
Sensor Mainframe
RL
4
S
R
470 nF
Two-wire-application
R=
S
Ω
L330=Rfor example : 120
Ω
AES0126
4
S
V
GND QC 2
1
3
p
R
S
V
VSIGNAL
Line
Sensor Mainframe
RL
4
Three-wire-application
470 nF
F
C4.7 nF 4.7 nF
for example : R= 330
L
Ω
P
0=R330
Ω
...
TLE4921-5U
Application Configurations
Data Sheet 17 V 1.1, 2008-01
Figure 10 System Operation
AED01697
14
Missing ToothWheel Profile
Magnetic Field Difference
Large Airga
Small Airgap
S
V
Q
Output Signal
Operate point:
Release point: switches the output ON (
∆
switches the output OFF (
The magnetic field is defined as positive if the south pole of
the magnet shows towards the rear side of the IC housing.
(N)
N(S)
1
BB
2
B
=
B
2
_
B
1
= 0.75 mT
RP
B
∆
∆
B
HYS
∆
B
OP
0.75 mT
_
=
1
B
_
2
B
HYS
B
RP
B
∆=∆∆
OP
+
B
>∆
B
RP Q
V
= HIGH)
1
B
2
B
_
B
<∆
OP
= LOW)
Q
V
TLE4921-5U
Typical Performance Characteristics
Data Sheet 18 V 1.1, 2008-01
7 Typical Performance Characteristics
Quiescent Current versus
Supply Voltage
Quiescent Current versus
Output Current
Quiescent Current versus
Temperature
Saturation Voltage versus
Temperature
0
AED03167
1
2
3
4
5
6
7
8
10
mA
9
0
V
S
I
Q
S
I
= 40 mA
5101520 2
5
V
S ON
I
I
S OFF
S Diff
I
0
AED03169
1
2
3
4
5
6
7
8
10
mA
9
0
S
I
= 12 V
10 20 30 40 5
0
mA
S ON
I
OUT
I
S
V
0
AED03168
2
4
6
8
10
mA
-50
T
j
I
ON
S
I
= 40 mA
S ON
I
I
S OFF
S Diff
I
˚C-10 30 70 110 150 23
0
1
3
5
7
9
0
AED03170
mV
-50
= 4.5 V
0 50 100 150 20
0
˚C
j
T
S
V
Q
V
Q
I
= 50 mA
50
100
150
200
250
300
400
TLE4921-5U
Typical Performance Characteristics
Data Sheet 19 V 1.1, 2008-01
Output Saturation Voltage versus
IQ @ 25°C Tj
Center of Switching Points versus
Temperature
Saturation Voltage versus
Supply Voltage
Hysteresis versus Temperature
-400
AED03171
mV
-60
= 4.5 V
S
V
Q
I
±50 mA,
-40 -20 0 20 6
0
mA
I
Q
Out Sat Voltage
-300
-200
-100
0
100
200
300
-2
AED03173
-60
= 200 Hz
f
-1
0
1
2
˚C
M
B
T
j
M
B
= ( OP
B
+
B
RP)/2
max
typ
min
mT
-20 20 60 100 18
0
0
AED03172
V
0
Q
V
Q
I
= 40 mA
0.05
0.10
0.15
0.20
0.25
0.30
0.40
T
j
= 25 ˚C
S
V
5 101520253
0
0
AED03174
-60
= 200 Hz
f
1
2
3
4
˚C
Hy
B
T
j
Hy
B
=
RP
B
-
B
OP
max
typ
min
mT
-20 20 60 100 18
0
TLE4921-5U
Typical Performance Characteristics
Data Sheet 20 V 1.1, 2008-01
Minimum Switching Field versus
Frequency
Delay Time between Switching Threshold
∆B and Falling Edge of VOUT at Tj = 25°C
Minimum Switching Field versus
Frequency
Delay Time between Switching Threshold
∆B and Rising Edge of VOUT at Tj = 25°C
0
AED03175
min
B
f
F
C
= 1 µF
0.5
1.0
1.5
kHz
mT
T
j= 25 ˚C
= -40 ˚C
T
j
-2
10 -1
10 0
10 1
10 2
10
0
5
10
15
20
25
0 5000 10000 15000 20000 25000
Hz
µs
∆B = 2mT
∆B = 5mT
∆B = 2mT, f =200Hz
f
t
dop
0
AED03176
min
B
f
F
C
= 1 µF
0.5
1.0
1.5
mT
T
j
= 150 ˚C
= 170 ˚C
T
j
10
-2
10
-1
10
0
10
1
kHz 10
2
0
5
10
15
20
25
0 5000 10000 15000 20000 25000
Hz
µs
∆B = 2mT
∆B = 5mT
∆B = 2mT, f =200Hz
f
t
drp
TLE4921-5U
Typical Performance Characteristics
Data Sheet 21 V 1.1, 2008-01
Delay Time versus Differential Field
Rise and Fall Time versus Temperature
Delay Time versus Temperature
Rise and Fall Time versus
Output Current
10
AED03181
-50
T
ns
t
r
t
f
t
0 50 100 150 20
0
˚C
15
20
25
30
35
40 = 40 mA
Q
I
j
5.0
AED03180
-60
T
µs
t
drp
t
dop
t
5.5
6.0
6.5
7.0
7.5
8.0
8.5
-10 40 90 140 190˚C
∆= 2 mT,
B
= 200 Hz
f
0
AED03182
0
ns
t
r
t
f
t
20 40 60 80 100mA
20
40
60
80
100
120 = 25 ˚C
j
T
OUT
I
TLE4921-5U
Typical Performance Characteristics
Data Sheet 22 V 1.1, 2008-01
Capacitor Voltage versus Temperature
Filter Sensitivity versus Temperature
Switching Thresholds versus
Mechanical Stress
Filter Input Resistance versus
Temperature
0
AED03183
-50
T
V
0 50 100 150 20
0
˚C
0.5
1.0
1.5
2.0
2.5
3.0
C
V
j
typ
-10
AED03185
-50
T
m
V/mT
0 50 100 150 20
0
˚C
C
S
j
typ
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
0.5
AED03184
0
F
1234
5
N
0.6
0.7
0.8
0.9
1.0 j
T
= 25 ˚C
∆rp,
∆op)
(
max
min
B
B
0.6
AED03186
-50
T
0 50 100 150 20
0
˚C
j
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.6
C
R
R
C
@ 25˚C
TLE4921-5U
Typical Performance Characteristics
Data Sheet 23 V 1.1, 2008-01
Delay Time for Power on (VS Switching
from 0 V to 4.5 V) tpon versus Temp.
Periodjitter (1σ) versus Temperature
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.
0
AED03187
-50
T
ms/nF
0 50 100 150 20
0
˚C
k
min
typ
max
0.05
0.10
0.15
0.20
0.25
0.30
0.40 ∆= 10 mTB@
0
AED03188
-40
T
J
itter
j
= 1 KHz,
fB
P
= 5 mT
˚C
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
%
0.50
TLE4921-5U
0 40 80 120 20
0
Table 6 Electro Magnetic Compatibility
ref. DIN 40839 part 1; test circuit 1
Parameter Symbol Level/Typ Status
Testpulse 1
Testpulse 2
Testpulse 3a
Testpulse 3b
Testpulse 4
Testpulse 5
VLD IV / – 100 V
IV /100 V
IV / – 150 V
IV / 100 V
IV / – 7 V
IV / 86.5 V
C
B
C
C
C
C
TLE4921-5U
Typical Performance Characteristics
Data Sheet 24 V 1.1, 2008-01
Figure 11 Distance Chip to Upper Side of IC
P-SSO-4-1 : 0.3
d : Distance chip to branded side of I
C
mm
±0.08
AEA0271
2
Hall-Probe
Branded Side
d
TLE4921-5U
Package Outlines
Data Sheet 25 V 1.1, 2008-01
8 Package Outlines
Figure 12 PG-SSO-4-1 (Plastic Single Small Outline Package)
6.35±0.4
12.7±0.3
±0.3
4
1
x
45˚
12.7±1 -0.1
1
0.25±0.05
7˚
7˚
0.2+0.1
Adhesiv
e
±0.5
61-1
±0.5
18
Tape
0.39±0.1
-0.15
0.25
9
±0.5
23.8
+0.75
-0.5
38 MAX.
1 MAX.
3.38
3.71
(0.25)
±0.08
±0.06
1.9 MAX.
5.16±0.08
5.34
±0.05
0.1 MAX.
(14.8)
1)
1.27 1.27 3.81=3 x
2 A
A
1
) No solder function area
Total tolerance at 10 pitches ±1
(Useable Length)
Tape
±1˚
14
0.2
±0.05
0.4
0.6 MAX.
4x 0.5
CODE CODE CODE
GPO05357
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Published by Infineon Technologies AG