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PDF KP110 Data sheet ( Hoja de datos )
| Número de pieza | KP110 | |
| Descripción | Absolute Pressure Sensor IC Programmable Temperature Compensation | |
| Fabricantes | Infineon Technologies | |
| Logotipo |  |
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KP110
Absolute Pressure Sensor IC
Programmable Temperature Compensation and Calibration
On-Chip Signal Conditioning
Low Cost Bare Die Version
Data Sheet
357
Features
• Ratiometric analog output
• Programmable transfer function performed
by customer
• High accuracy over a large temperature range
up to ± 1.2 kPa (10 ... 85 °C)
• CMOS compatible surface micromachining
• Bare die
KP110
• Specific transfer functions programmable
• Broken wire detection
Type
KP110
Ordering Code
Q62705-K432
Minimum Order Quantity
1 Wafer
Product Description
The KP110 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 KP110 is a high
precision IC for cost critical solutions. 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.
Data Book
1
2003-05
1 page  
KP110
The table below shows the internal registers of the KP110. For the shaded registers
PROM cells exist. The PROM cells are used for permanent programming of the
calibration data.
In addition to the registers in the table below a 12 x 9 bit RAM table exists for the
linearization and definition of the analog pressure signal. This RAM table is also
overlayed by PROM cells.
To write a 9 bit word to the RAM table at first the data content must be written into the
MEMDAT register. In a further write cycle the desired word is addressed by the 4 LSBs
of the MEMCTL register.
Register
Function
MEMDAT
Data bit 0 to 9
MEMCTL
Selection of register of linearization table
GLOBOFF
Global offset compensation
FUSE_NR
Fuse number
TESTREG
Selection of register for read cycle
TGAIN
Temperature gain compensation (linear and square)
TOFFL
Linear temperature offset compensation
TOFFQ
Square temperature offset compensation
MODEREG
Selection of registers for programming of PROM
The shaded registers in the table are overlayed with PROM
Nonvolatile Memory
Each PROM cell consists of a thin polysilicon wire located in a small evacuated cavity.
The cells are called HR-fuses. In order to write a logic "1" to a HR-cell the wire has to be
cut with a current pulse. Since the current can reach up to 100 mA only a single HR-fuse
can be programmed at a time.
The desired bit within a HR-fuse register is addressed by a register called FUSE_NR. In
case of the linearization table the desired PROM register itself is addressed by the
MEMCTL-register. In order to program the GLOBOFF, TGAIN, TOFFL and TOFFQ
register the MODREG-register is used for addressing.
After the correct addressing of PROM register and bit a fuse pulse has to be applied to
pad 1. The requirements for the pulse voltage, length and slew rate are given in the
electrical characteristics.
The exact sequences for RAM/PROM reading/writing are available on request.
Data Book
5
2003-05
5 Page 
KP110
Accuracy
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:
• Pressure:
Output deviation from target transfer function over the specified pressure range.
• Temperature:
Output deviation over the temperature range.
• Aging during operating time
The error band is determined by a continuous line through four relevant break points:
Break Point (°C)
– 40
10
85
140
Typical Accuracy (kPa)
± 2.4
± 1.2
± 1.2
± 2.4
Note: The gained output signal accuracy depends largely on the quality of the mounting
and calibration process accomplished by the customer!
Figure 5 Overall Accuracy over Temperature
Data Book
11
2003-05
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet KP110.PDF ] | |
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