INFINEON KP120

Data Sheet,V1.1, Oct. 2003
Surface Mount Capacitive Silicon
Absolute Pressure Sensor
KP120, KP120 Exxxx
Sensors
N e v e r
s t o p
t h i n k i n g .
Edition 2003-10-17
Published by Infineon Technologies AG,
St.-Martin-Strasse 53,
81669 München, Germany
© Infineon Technologies AG 2003.
All Rights Reserved.
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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).
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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.
Surface Mount Capacitive Silicon Absolute Pressure
Sensor
KP120, KP120 Exxxx
Features
•
•
•
•
•
•
Ratiometric analog output
Calibrated transfer function
High accuracy over a large temperature range
(1.5 kPa max. error over 0 ... 85 °C)
CMOS compatible surface micromachining
SMD housing
Customized transfer functions available
(KP120 Exxxx)
P-DSOF-8-5
Type
Ordering
Code
Pressure Range
KP120
Q62705-K352 40 kPa - 115 kPa
Overall
Accuracy
Package
1.2 kPa
P-DSOF-8-5
Product Description
The KP120 is a miniaturized absolute pressure sensor IC based on the capacitive
principle. It is surface micromachined with a monolithic integrated signal conditioning
circuit realized in the state-of-the-art 0.8 µm BiCMOS technology. As the KP120 is a high
precision IC for cost critical solutions the chip is packaged in a low cost SMD housing.
High accuracy and high sensitivity enable the dedication in automotive applications as
well as consumer products.
In the automotive field the manifold air pressure (MAP) and barometric air pressure
(BAP) are important parameters to compute the air-fuel ratio provided to the engine and
for controlling spark advance to optimize engine efficiency.
The IC consists of a surface micromachined pressure sensor, a sigma-delta A/Dconverter, a digital filter and the SPI-interface. In normal operation, the applied pressure
has to be in the range between 10 kPa and 150 kPa and the KP120, KP120 Exxxx can
deliver output voltages between 0.25 V and 4.85 V.
Data Sheet
3
V1.1 2003-10-17
KP120, KP120 Exxx
Pin Configuration
(top view)
Figure 1
Pin Definitions and Functions
Pin No.
Symbol
Function
1
N.C.
Not to be connected
2
SERIAL_CLK/
PROG_VOLT
Used for calibration in manufacturing
3
SERIAL_IN
Used for calibration in manufacturing
4
SERIAL_OUT
Used for calibration in manufacturing
5
VDD
5 V Supply voltage
6
GND
0 V Circuit ground potential
7
VOUT
Output
8
N.C.
Not to be connected
Data Sheet
4
V1.1, 2003-10-17
KP120, KP120 Exxx
Figure 2
Data Sheet
Block Diagram of the KP120
5
V1.1, 2003-10-17
KP120, KP120 Exxx
Transfer Function
The device is fully calibrated on delivery. The sensor has a linear transfer function
between the applied pressure and the output signal:
VOUT = VDD × (a × p + b)
The output is ratiometric.
The gain a and the offset b are calibrated to realize the demanded transfer function.
Transfer Function KP120
With the parameters a and b the following calibration is adjusted:
pN, MIN = 40 kPa → VOUT = 0.5 V and
pN, MAX = 115 kPa→ VOUT = 4.5 V.(@VDD = 5 V)
The nominal transfer function for KP120 is given by:
p
- – 0.32667 )
V OUT = 5.000 V × ( 0.01067 × ---------kPa
Figure 3
Data Sheet
Nominal Transfer Function for the KP120 Version
6
V1.1, 2003-10-17
KP120, KP120 Exxx
Absolute Maximum Ratings
Parameter
Symbol
VDD
VDD
PMAX
pBURST
TA
Supply voltage
Supply voltage1)
Pressure overload (300 sec.)
Burst pressure
Ambient Temperature
Limit Value KP120
and KP120 Exxxx
Unit
min.
max.
– 0.3
6.0
V
–
16.5
V
–
360
kPa
400
–
kPa
– 40
125
°C
1) [email protected] °C
Note: Stresse above those listed here may cause permanent damage to the device.
Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
ESD Protection
Human Body Model (HBM) tests according to:
Standard EIA/JESD22-A114-B HBM (covers MIL STD 883D)
Parameter
ESD-Protection
Data Sheet
Symbol
VESD
Limit Values
min.
max.
–
±2
7
Unit
Notes
kV
R = 1.5 kΩ,
C = 100 pF
V1.1, 2003-10-17
KP120, KP120 Exxx
Operating Range
Parameter
Supply voltage
Supply current @ 5 V
Output current (sink/source)1)
Operating Ambient Temperature2)
Minimum rated pressure
KP120
KP120 Exxxx
Symbol
VDD
IIN
IOUT
TA
pN, MIN
Limit Value
min.
typ.
max.
4.75
5.0
5.25
V
2
–
9
mA
0.25
mA
+125
°C
– 0.25
– 40
pN, MAX
Pressure span
KP120
KP120 Exxxx
PSPAN
–
kPa
–
10
Maximum rated pressure
KP120
KP120 Exxxx
Unit
40
–
–
50
kPa
–
100
115
–
–
150
kPa
–
70
75
–
–
105
1) sink current:current into device
source current:current driven by device
2) -40 °C ... 125 °C (1000h),
-40 °C ... 85 °C (5000h)
Data Sheet
8
V1.1, 2003-10-17
KP120, KP120 Exxx
Electrical Characteristics
VDD = 5 V, GND = 0 V, TA = 0 °C to +85 °C, unless otherwise specified.
Parameter
Symbol
Limit Value
min.
Output voltage at min. rated pressure
KP120
KP120 Exxxx
1)
typ.
Unit
max.
VOUT, MIN
V
–
0.25
Output voltage at max. rated pressure1)
KP120
KP120 Exxxx
VOUT, MAX
Overall accuracy2)
ACC
Ratiometricity3)
KP120
KP120 Exxxx
Rat
Response time4)
tR
0.5
–
–
0.5
V
–
4.5
4.5
–
–
4.85
see page 11
kPa
mV
–
–
5
–
–
10
–
5
–
Output ripple
@ f > 1 kHz
@ f < 1 kHz
–
–
–
–
10
5
Stabilization time5)
–
–
20
ms
mVpp
ms
1) The output of the sensor is ratiometric to the supply voltage VDD within its specified range of 4.75 to 5.25 V.
2) Accuracy is the deviation in actual output from nominal output over the entire pressure and temperature
range according to figure below due to all sources of error including the following:
■Linearity:
Output deviation from a straight line relationship with pressure over the specified pressure range.
3) Definition:
V DD
Rat = V OUT ( @ V DD ) – V OUT ( @5 V ) ---------5V
for VOUT in the range of 0.1 × VDD to 0.9 × VDD
and VDD in the range of 4.75 V to 5.25 V
4) Response time is defined as the time for the incremental change in the output to go from 10% to 90% of its
final value when subjected to a specified step change in pressure.
5) Stabilization time is defined as the time required for the product to meet the specified output voltage after the
pressure has been stabilized.
Data Sheet
9
V1.1, 2003-10-17
KP120, KP120 Exxx
Circuitry
It is recommended, that the input circuit of the pressure sensor IC is protected against
overload voltage and electro-magnetic influences. Therefore, a 100 nF capacitance
should be arranged in parallel (like shown in <Fett>Figure 4).
The output circuitry acts as a low pass decoupling filter (cut off frequency here: 720 Hz)
between the output of the sensor IC and the A/D input of the µC.
Note: Circuitries of customer specific applications may deviate from this circuitry.
Figure 4
Feasible In-/Output Circuitry of the KP120, KP120 Exxxx
The output circuit is protected against short circuit to VDD and GND.
Data Sheet
10
V1.1, 2003-10-17
KP120, KP120 Exxx
Overall Accuracy
The maximum temperature error is determined by a continuous line through four relevant
break points:
Break point (°C)
Overall Accuracy (kPa)
KP120
Overall Accuracy (kPa)
KP120 Exxxx
– 40
± 2.4
± 3.0
0
± 1.2
± 1.5
85
± 1.2
± 1.5
125
± 2.4
± 3.0
Figure 5
Data Sheet
Overall Accuracy over Temperature
11
V1.1, 2003-10-17
KP120, KP120 Exxx
Package Outlines
GMX09490
P-DSOF-8-5
(Plastic Dual Small Outline Flat Package)
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
12
Dimensions in mm
V1.1, 2003-10-17
KP120, KP120 Exxx
Revision History:V1.1
Previous Version: 1.0
Page
Subjects (major changes since last revision)
7,8
Sink and source current defined within operating range
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Data Sheet
13
V1.1, 2003-10-17
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Published by Infineon Technologies AG