TLE4953 Data Sheet (816 KB, EN)

Data Sheet, V 4.0, 2010-04
TLE4953
T LE4 95 3C
Differential Two-Wire Hall Effect Sensor IC
Sensors
Edition 2010-04
Published by Infineon Technologies AG,
81726 München, Germany
© Infineon Technologies AG 6/25/10.
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
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Due to technical requirements components may contain dangerous substances. For information on the types in
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be endangered.
TLE4953
TLE4953C
Revision History:
2010-04
Previous Version:
V 3.0
Page
V 4.0
Temperature profile adjustment
TLE4953C package change
Maximum value of the differential direction limit added
Storage temperature info provided by application notes: Storage of
products supply by Infineon Technologies
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TLE4952 Series
Differential Two-Wire Hall Effect Sensor IC
TLE4953
TLE4953C
Data Sheet V4.0
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
Two-wire PWM current interface
Detection of rotation direction
Dynamic self-calibration principle & high sensitivity
Adaptive hysteresis
Single chip solution - no external components
Vibration suppression in calibrated mode
South and north pole pre-induction possible
High resistance to piezo effects
Large operating air-gaps
Wide operating temperature range
From zero speed up to 12 kHz
1.8 nF overmolded capacitor
For coarse transmission target wheels
Type
Marking
Order Code
Package
TLE4953C
53C1R
SP000710696
PG-SSO-2-4
TLE4953
53
SP000278512
PG-SSO-2-1
The differential Hall Effect sensor TLE4953 is designed to provide information about
rotational speed and direction of rotation to modern transmission and ABS systems. The
output has been designed as a two wire current interface based on a Pulse Width
Modulation principle. The sensor operates without external components and combines
a fast power-up time with a wide frequency range. Excellent accuracy and sensitivity is
specified for harsh automotive requirements as a wide temperature range, high ESD
robustness and high EMC resilience. State-of-the-art BiCMOS technology is used for
monolithic integration of the active sensor areas and the signal conditioning.
Finally, the optimized piezo compensation and the integrated dynamic offset
compensation enable easy manufacturing and elimination of magnetic offsets. Adaptive
hysteresis concept increases the noise immunity. The TLE4953C is additionally
provided with an overmolded 1.8 nF capacitor for improved EMI performance.
Data Sheet
1
V 4.0, 2010-04
TLE4953
TLE4953C
Pin Configuration (top view)
2.5
2.67
Center of
Sensitive
Area
± 0.15
Date Code
1.44
Marking
GyywwS
53C1R
VCC
VCC
GND
GND
AEP03191-53
Figure 1
supply
generator
clock
gen.
system control
& watchdog
output
protocol
slope/peak
detection
offset
calc.
Hall probes:
Right
+
-
A/D
PGA
D/A
Centr
Left
-
+
-
(R+L)/2-C
-
LP
comp
D/A
Figure 2
Data Sheet
Tracking
algor.
+ noise
shaper
Dig.
Filter
Direction
algorithm
Block Diagram
2
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TLE4953
TLE4953C
Functional Description
The differential Hall Effect IC detects the motion of ferromagnetic or permanent magnet
structures by measuring the differential flux density of the magnetic field. To detect the
motion of ferromagnetic objects the magnetic field must be provided by a backbiasing
permanent magnet. Either the South or North pole of the magnet can be attached to the
rear, unmarked side (remark: rear side may contain data matrix code) of the IC package.
Magnetic offsets of up to ± 20 mT and mechanical offsets are cancelled out through a
self-calibration algorithm. Only 2 transitions are necessary for the self-calibration
procedure. After the initial self-calibration sequence switching occurs when the input
signal crosses the adaptive threshold on the rising magnetic edge.
The ON and OFF state of the IC are indicated by High and Low current consumption.
Each rising magnetic edge of the magnetic input signal triggers an output pulse.
Magnetic Signal
Pulse
Length
Output Signal
AED03189
Figure 3
Output Pulses on magnetic rising edge
In addition to the speed signal, the following information is provided by varying the length
of the output pulses (PWM modulation):
Speed signal = S
The speed signal is issued at the first output pulse after start up and when the magnetic
frequency is above 1kHz.
Direction of rotation left = DR-L
DR-L information is issued in the output pulse length when the active target wheel in front
of the Hall Effect IC moves from the pin VCC to the pin GND.
Direction of rotation right = DR-R
DR-R information is issued in the output pulse length when the active target wheel in
front of the Hall Effect IC moves from the pin GND to the pin VCC.
Data Sheet
3
V 4.0, 2010-04
TLE4953
TLE4953C
S
N
N
S
S
N
N
DR-L
S
S
N
DR-R
G 0415 S
53C1R
AEA03193
Figure 4
Definition of Rotation Direction
Circuit Description
The circuit internally is supplied by a voltage regulator. A 2 MHz on-chip oscillator serves
as a clock generator for the DSP and the output encoder.
Speed signal circuitry
TLE4953 speed signal path comprises a pair of Hall Effect probes, separated from each
other by 2.5 mm, a differential amplifier including noise limiting low-pass filter, and a
comparator triggering a switched current output stage. An offset cancellation feedback
loop is provided through a signal-tracking A/D converter, a digital signal processor
(DSP), and an offset cancellation D/A converter.
Uncalibrated Mode
Occasionally a short initial offset settling time td,input might delay the detection of the input
signal. (The sensor is "blind"). During the startup phase (un-calibrated mode) the output
is disabled (I = ILow). The magnetic input signal is tracked by the speed ADC and
monitored within the digital circuit. For detection the signal needs to exceed a threshold
(digital noise constant d1). When the signal slope is identified as a rising edge, a trigger
pulse is issued to a comparator. A second trigger pulse is issued as soon as the next
rising edge is detected.
Between the start-up of the magnetic input signal and the time when its second extreme
is reached, the PGA (programmable gain amplifier) will switch to its appropriate position.
This value is determined by the signal amplitude and initial offset value. The digital noise
constant value is changing accordingly (d1 → d2, related to the corresponding PGA
Data Sheet
4
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TLE4953
TLE4953C
states), leading to a change in phase shift between magnetic input signal and output
signal. After that consecutive output edges should have a nominal delay of about 360°.
During the uncalibrated mode the offset value is calculated by the peak detection
algorithm as described below.
The differential input signal is digitized in the speed A/D converter and fed into the DSP
part of the circuit. The minimum and maximum values of the input signal are extracted
and their corresponding arithmetic mean value is calculated. The offset of this mean
value is determined and fed into the offset cancellation DAC.
The offset update takes place when two valid extremes are found and the direction of the
update has the same orientation as the magnetic slope (valid for calibrated mode). For
example an positive offset update is only possible on a rising magnetic edge. The offset
update is done independant from the output switching.
After successful correction of the offset, the output switching is in calibrated mode.
Switching occurs at adaptive threshold-crossover. It is only affected by the propagation
delay time of the signal path, which is mainly determined by the noise limiting filter.
Signals which are below a predefined threshold ∆BLimit are not detected. This prevents
unwanted switching.
The adaptive hysteresis is linked to the PGA state. Therefore the system is able to
suppress switching if vibration or noise signals are smaller than the adaptive hysteresis.
The switching and direction information is fed into the DSP and the output encoder. The
pulse length of the High output current is generated according to the rotational speed
and the direction of rotation.
Direction signal circuitry
The differential signal between a third Hall probe and the mean value of the differential
Hall probe pair is obtained from the direction input amplifier. This signal is digitized by
the direction ADC and fed into the digital circuitry. There, the phase of the signal referring
to the speed signal is analyzed and the direction information is forwarded to the output
encoder. The phase is identified by calculating the size of the direction signal at two
consecutive zero crossings of the speed signal. This is done by subtracting the current
direction signal from the internal stored value which has been taken from the previous
magnetic edge.
Depending on the phase shift between the direction signal and the speed signal a
positive or a negative value occur. The information if the new direction calculation takes
place at a rising or a falling magnetic edge allows together with the algebraic sign of the
calculated direction signal a reliable direction detection.
The first pulse after power is always a speed pulse as there is no stored direction
information available.
Data Sheet
5
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TLE4953
TLE4953C
Vibration suppression algorithm:
The magnetic signal amplitude and the direction information is used for detection of
parasitic magnetic signals. Unwanted magnetic signals can be caused by angular or
airgap vibrations for instance. If an input signal is clearly detected as a vibration signal,
the output of pulses will be suppressed.
A magnetic input signal is classified as parasitic vibration signal if
a. the speed signal amplitude is smaller than the internal hysteresis or
b. the direction signal amplitude is smaller than the internal limit or
c. the direction signal consists of alternating left/right information
The quality of vibration suppression (according a & b) depends on the hysteresis limits
and on the magnitude of the magnetic signal. The bigger the hysteresis the better the
suppression of parasitc signals.
For parasitic signals where items above (a. to c.) are not clearly applicable or at other
more rare cases (e.g. IC startup) vibration suppression is not guaranteed. The
performance of the direction detection and vibration suppression algorithm depends on
the used magnetic circuit and as well on the used target wheel and need to be evaluated.
Please ask for application support if you have questions on the vibration suppresion algorithm.
Package information:
Pure tin covering (green lead plating) is used. Lead frame material is Wieland K62 (UNS:
C18090) and contains CuSn1CrNiTi. 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 (see also information
note 136/03). Please refer to your key account team or regional sales if you need further
information.
Data Sheet
6
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TLE4953
TLE4953C
Absolute Maximum Ratings
Tj = -40 to 150 °C, 4.0V ≤ VCC ≤ 16.5 V
Parameter
Supply voltage
Symbol
VCC
Limit Values
min.
max.
– 0.3
–
–
16.5
–
20
–
22
–
24
Unit
Remarks
V
Tj ≤ 80 °C
Tj = 170 °C
Tj = 150 °C
t = 10 × 5 min
t = 10 × 5 min,
RM ≥ 75 Ω included in
VCC
–
27
t = 400 ms, RM ≥ 75 Ω
included in VCC
Reverse polarity current
Irev
–
200
mA
External current
limitation required,
t ≤4 h1)
Junction temperature
Tj
–
150
°C
5000 h, VCC ≤16.5 V
–
160
2500 h, VCC ≤ 16.5 V
(not additive)
–
170
500 h, VCC ≤ 16.5 V
(not additive)
–
190
4 × 1 h, VCC ≤ 16.5 V
–
10000
h
-40°C to 125°C
–
190
K/W
3)
Active lifetime2)
Thermal resistance
PG-SSO-2-4,
PG-SSO-2-1
tB,active
RthJA
1) This allows together with an external serial resistor (75 or 100 Ohm) reverse polarity voltage for a short duration. This
resistor is usually present in the ECU of the application circuit.
2) Life time shall be considered as anticipation and will not extend the agreed warranty period
3) Can be improved significantly by further processing like overmolding
Note: Stress in excess of those listed here may cause permanent damage to the device.
Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Data Sheet
7
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TLE4953
TLE4953C
ESD Protection
Characterized according to Human Body Model (HBM) tests in compliance with
Standard EIA/JESD22-A114-B HBM (covers MIL STD 883D) )
Parameter
Symbol
Limit Values
min.
ESD-Protection
TLE4953C
TLE4953
VESD
Unit
Notes
kV
R = 1.5 kΩ,
C = 100 pF
max.
-
± 12
± 12
Operating Range
Parameter
Symbol
Limit Values
min.
max.
Unit
Remarks
Supply voltage
VCC
4.5
20
V
Directly on IC leads
excludes the RM voltage
drop
Supply voltage
VCC
4.0
4.5
V
Directly on IC leads
excludes the RM voltage
drop 1)
Supply voltage ripple
VAC
–
6
Vpp
VCC = 13 V
0 ≤ f ≤ 50 kHz
Junction temperature
Tj
– 40
150
°C
Pre-induction
Pre-induction offset
between outer probes
Pre-induction offset
between mean of outer
probes and center probe
Differential Induction
500h VCC ≤ 16.5 V 2)
or
170
B0
– 500
∆Bstat., l/r – 20
+ 500
mT
+ 20
mT
L-R
∆Bstat.,
– 20
+ 20
mT
(L+R)/2-C
– 120
+ 120
mT
m/o
∆B
1) Reduced performance possible for jitter/phase accuracy and power supply rejection ratio (EMC). Current levels will
typically decrease but will be within specification limits. This voltage range is not recommended for continuos operation
and should cover the function during short voltage drops which may occur at cranking of engine / test pulse 4.
2) increased jitter and reduced phase accuracy permissible between 150 and 170°C junction temperature.
Note: Within the operating range the functions given in the circuit description are fulfilled.
Data Sheet
8
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TLE4953
TLE4953C
AC/DC Characteristics
All values specified at constant amplitude and offset of input signal, over operating range, unless
otherwise specified. Typical values correspond to VCC=12V and TA=25°C
Parameter
Symbol
Limit Values
Unit
Remarks
min.
typ.
max.
ILow
IHigh
IHigh/ILow
tr, tf
5.9
7
8.4
mA
11.8
14
16.8
mA
1.9
–
–
12
–
26
mA/µs RM = 75 Ω
Tj ≤ 170 °C
See Figure 5
Output rise/fall slew rate
TLE4953C
tr, tf
8
–
26
mA/µs RM = 75 Ω
Tj ≤ 170 °C
See Figure 5
Current ripple dIX/dVCC
IX
–
–
90
µA/V
Only valid for
TLE4953
Limit threshold speed
0Hz ≤ f ≤ 2500 Hz
2500 Hz ≤ f ≤ 12000 Hz
∆BLimit
mT
1)
mT
Calculated at two
consecutive
threshold
crossings2)
Additional to nstart
Supply current
Supply current
Supply current ratio
Output rise/fall slew rate
TLE4953
0.35
0.8
Limit differential direction ∆BDir
signal
0Hz ≤ f ≤ 1100 Hz
Initial calibration delay
time
td,input
Magnetic edges required nstart
for first output pulse
(no previous vibration
detected)
Number of pulses in
uncalibrated mode
Frequency
Data Sheet
0.35
0.73
–
300
345
µs
–
–
2
magn. pulse occurs only
edges on rising
magnetic edge
2
pulses
3rd pulse
calibrated
pulses
3rd pulse correct
nDZ-Startup
Number of emitted pulses nDR-Start
with invalid direction
information3)
f
1.5
1.75
–
–
24)
0
–
12000 Hz
9
4)
V 4.0, 2010-04
TLE4953
TLE4953C
AC/DC Characteristics (cont’d)
All values specified at constant amplitude and offset of input signal, over operating range, unless
otherwise specified. Typical values correspond to VCC=12V and TA=25°C
Parameter
Symbol
Limit Values
min.
typ.
Unit
Remarks
Systematical
phase error of
"uncal" pulse; nth
vs. n+1th pulse
(does not include
jitter)
max.
Systematic phase error of
output edges during
start-up and uncalibrated
mode
– 88
+ 88
°
Phase shift during
∆Φswitch
transition from
uncalibrated to calibrated
mode
– 90
+ 90
°
Phase shift change
during PGA switching in
calibrated mode
0
80
°
Magnetic differential field ∆ B̂Limit,
change required for
early startup
startup with 1st rising
edge
Due to adaptive
hysteresis.
Depending on
signal shape.
peak to peak
value
∆ B̂Limit, early startup
3.5
mT
Jitter, Tj ≤ 150 °C
Tj ≤170 °C
f ≤ 2500 Hz
SJit-far
–
–
–
–
±2
±3
%
Jitter, Tj ≤ 150 °C
Tj ≤170 °C
2500 Hz < f ≤12000 Hz
SJit-far
–
–
–
–
±3
± 4.5
%
5)
Jitter at board net ripple
SJit-AC
–
–
±2
%
5)
5)
1 σ value
VCC = 12 V
∆B ≥ 2 mT
1 σ value
VCC = 12 V
∆B ≥ 2 mT
VCC = 13 V ± 6
Vpp
0 ≤f ≤50 kHz
∆B = 15 mT
1) magnetic amplitude values, sine magnetic field, Limits refer to the 50% criteria. 50% of pulses are missing.Only valid at
lowest PGA stage/highest amplification because of adaptive hysteresis.
2) Magnetic peak to peak value. Limits refer to the 99% criteria, just 1 pulse missing out of 100.
3) The first 2 pulses may contain only direction information if the direction signal is above ∆BDir.The first pulse after starting
will be the speed pulse.
4) High frequency behaviour not subject to production test - verified by design/characterization.
Data Sheet
10
V 4.0, 2010-04
TLE4953
TLE4953C
5) not subject to production test- verified by design/characterization, magnetic values are amplitude values
I
tr
tf
IHigh
90%
50%
ILow
10%
t1
t
AET03194
Figure 5
Definition of Rise and Fall Time
Timing Characteristics
Parameter
Pre-low length
Speed signal
Length of DR-L pulse
Length of DR-R pulse
Output of DR-L/R pulse,
maximum frequency
From low - high frequency
From high - low frequency
Symbol
tpre-low
tS
tDR-L
tDR-R
fDR, max
Limit Values
Unit
min.
typ.
max.
24
30
36
µs
24
30
36
µs
50
60
70
µs
102
120
138
µs
Hz
935
850
1100
1000
1265
1150
Remarks
Internal
hysteresis of
direction signal1)
1) Not possible overlap, 10% difference verified by design/characterization. Frequencies not subject to production test
verified by design/characterization
PWM Current Interface
Between each magnetic transition and the rising edge of the corresponding output pulse
the output current is Low for tpre-low in order to allow reliable internal conveyance.
Following the signal pulse (current is High) is output.
Data Sheet
11
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TLE4953
TLE4953C
If the magnetic direction field exceeds ∆BDir, the output pulse lengths are 60 µs or 120 µs
respectively, depending on the direction of rotation.
If the magnitude of the magnetic direction field is below ∆Bdir, the output pulses are
suppressed when the frequency is below fDR,max (see section vibration suppression). For
magnitudes of the magnetic differential field below ∆BLimit the signal is lost.
Speed pulse occur only at the first pulse after start up or above fDR, max.
If no magnetic differential signal change is detected the IC will remain in calibrated mode.
No internal reset are generated - therefore a zero speed operation is possible.
Internal
Sensor
Speed Signal
tpre-low
= 30 µs
tS = 30 µs
Transferred
Signal:
S
Xn
Xn+1
tDR-L= 2 x tS
Xn+2
Transferred
Signal:
DR-L
tDR-R= 4 x tS
Transferred
Signal:
DR-R
AET03196
Figure 6
Data Sheet
Definition of PWM Current Interface
12
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TLE4953
TLE4953C
Electro Magnetic Compatibility (values depend on RM!)
Characterization of Electro Magnetic Compatibility are carried out on sample base of one
qualification lot. Not all specification parameters have been monitored during EMC
exposure. Only key parameters as e.g. switching current have been monitored
Parameter
Symbol
Level/Typ
Status
Ref. ISO 7637-1; test circuit 1;
∆B = 2 mT (amplitude of sinus signal); VCC = 13.5 V, fB = 100 Hz; T = 25 °C; RM ≥ 75 Ω
Testpulse 1
Testpulse 2
Testpulse 3a
Testpulse 3b
Testpulse 4
Testpulse 5
VEMC
IV / – 100 V
IV / 100 V
IV / – 150 V
IV / 100 V
IV / – 7 V
IV / 86.53) V
C1)
C1)
A
A
B2)
C
1) According to 7637-1 the supply switched "OFF" for t = 200 ms.
2) According to 7637-1 for test pulse 4 the test voltage shall be 12 V ± 0.2 V. Measured with RM =75Ω only.
Mainly the current consumption will decrease. Status C with test circuit 1.
3) Applying in the board net a suppressor diode with sufficient energy absorption capability.
Ref. ISO 7637-3; test circuit 1;
∆B = 2 mT (amplitude of sinus signal); VCC = 13.5 V, fB = 100 Hz; T = 25 °C; RM ≥ 75 Ω
Testpulse 1
Testpulse 2
Testpulse 3a
Testpulse 3b
VEMC
IV / – 30 V
IV / 30 V
IV / – 60 V
IV / 40 V
A
A
A
A
Ref. ISO 11452-3; test circuit 1; measured in TEM-cell
∆B = 2 mT; VCC = 13.5 V, fB = 100 Hz; T= 25 °C
EMC field strength
(TLE4953)
ETEM-Cell
IV / 200 V/m
AM = 80%,
f = 1 kHz
EMC field strength
(TLE4953C)
ETEM-Cell
IV / 250 V/m
AM = 80%,
f = 1 kHz
Data Sheet
13
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TLE4953
TLE4953C
EMC-Generator
Mainframe
D1
VCC
Sensor
GND
VEMC
C1
D2
RM
C2
AES03199
Components: D1:
D2:
C1:
C2:
RM:
Figure 7
1N4007
T 5Z27 1J
10 µF/35 V
1 nF/1000 V
75 Ω/5 W
Test Circuit 1
d
Branded Side
Hall-Probe
d : Distance chip to branded side of IC
P-SSO-2-1/2 : 0.3 ±0.08 mm
AEA02961
Figure 8
Data Sheet
Package Outlines
14
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TLE4953
TLE4953C
PG-SSO-2-1 (Plastic Single Small Outline Package)
5.34 ±0.05
2 A
0.2
7˚
CODE
0.87 ±0.05
2
9 -0.5
2.54
1 -1
1
6 ±0.5
2x
0.2 +0.1
18 ±0.5
2x
0.5
38 MAX.
0.1
1.67 ±0.05
23.8 ±0.5
1.9 MAX.
0.25 ±0.05
+0.75
(14.8)
(Useable Length)
CODE
1 MAX.1)
(0.25)
3.38 ±0.06
3.71 ±0.08
CODE
1 x 45˚±1˚
1.2 ±0.1
1.9 MAX.
1 -0.1
7˚
12.7 ±1
0.1 MAX.
5.16 ±0.08
A
Adhesive
Tape
Tape
4 ±0.3
6.35 ±0.4
12.7 ±0.3
Total tolerance at 10 pitches ±1
0.25 -0.15
0.39 ±0.1
1) No solder function area
Dimensions in mm
Data Sheet
15
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TLE4953
TLE4953C
PG-SSO-2-4 (Plastic Single Small Outline Package)
3.01
5.16 ±0.08
1.81±0.05
1 -1
0.25 ±0.05
2.2 ±0.5
7˚
7˚
0.2 2x
9 -0.5
0.2 B
1
0.5 2x
0.2 +0.1
1.5 ±0.05
6 ±0.5
1.9 MAX.
1.2 ±0.05
2
0.1
0.87 ±0.05
1.67 ±0.05
38 MAX.
A
2x
(14.8)
(Useable Length)
23.8 ±0.5
A
CODE
+0.75
1.2 ±0.1
2.54
CODE
0.25 ±0.05
18 ±0.5
1 x 45˚±1˚
1.9 MAX.
1-0.1
0.1 MAX.
B
12.7 ±1
7.07 ±0.1
(8.17)
2 A
5.16 ±0.08
CODE
10.2 ±0.1
0.2
(2.2)
1)
0.65 ±0.1
(0.25)
3.38 ±0.06
3.71±0.08
5.34 ±0.05
A
Adhesive
Tape
(1.3)
Tape
A-A
4 ±0.3
6.35 ±0.4
12.7 ±0.3
Total tolerance at 10 pitches ±1
(2.4)
0.25 -0.15
0.39 ±0.1
Capacitor
(2.7)
5.34 ±0.05
Dimensions in mm
1) No solder function area
You can find all of our packages, sorts of packing and others in our Infineon Internet
Page “Products”: http://www.infineon.com/products.
Data Sheet
16
V 4.0, 2010-04
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Published by Infineon Technologies AG