KP276C1505
Digital Absolute Pressure Sensor
dTurboTMAP with SENT Output and Temperature Sensor Interface
Features
•
•
•
•
•
•
•
•
•
Increased media robustness for current automotive requirements
High accuracy pressure sensing (± 1.03% FSS)
Integrated signal processing for external temperature sensor
SENT protocol interface
Real 12-bit pressure resolution
Real 12-bit temperature resolution
Self diagnosis features
“Green” 8 pin SMD housing
Automotive qualified
Potential applications
•
•
Automotive applications, Industrial control
Consumer applications, Medical applications
Product validation
Qualified for automotive applications.
Product validation according to AEC-Q100.
Description
The KP276C1505 is a miniaturized Digital Absolute Pressure Sensor IC based on a capacitive principle. It is
surface micromachined with a monolithic integrated signal conditioning circuit implemented in BiCMOS
technology.
The sensor converts a pressure into a 12-bit digital value and sends the information via the SENT protocol (SAE
J2716 revised April 2016). In addition, an interface for an external negative temperature coefficient (NTC)
temperature sensor is provided. The temperature information given by the NTC is also digitized into a 12-bit
value and transmitted with the SENT protocol.
A special safety feature is the integrated diagnostic mode, which allows testing of the sensor cells as well as the
signal path. This diagnosis is triggered by powering the device.
The chip is packaged in a “green” media robust SMD housing. The sensor has been primarily developed for
measuring manifold air pressure, but can also be used in other application fields. The high accuracy, high
sensitivity and safety features of the device makes it a perfect fit for advanced automotive applications as well
as in industrial and consumer applications.
Type
Package
Ordering Code
Marking
KP276C1505
PG-DSOF-8-162
SP002167802
KP276C1505
Datasheet
www.infineon.com
Please read the Important Notice and Warnings at the end of this document
Revision 1.1
2019-11-11
KP276C1505
Digital Absolute Pressure Sensor
Table of contents
Table of contents
dTurboTMAP with SENT Output and Temperature Sensor Interface . . . . . . . . . . . . . . . . . . . . . . . .1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Potential applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Product validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1
1.1
1.2
1.3
1.4
1.4.1
1.4.2
1.5
1.5.1
1.6
1.6.1
1.6.2
1.6.2.1
1.6.2.2
1.6.2.3
1.6.2.4
1.6.3
1.6.4
1.6.5
1.6.5.1
1.6.5.2
1.6.5.3
1.6.5.4
1.6.6
1.7
1.7.1
1.7.2
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Transfer function pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Pressure transfer function characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pressure accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Transfer function temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Temperature transfer function characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SENT interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Physical layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Data link layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Nibble specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Status and communication nibble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Enhanced serial message format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Enhanced serial message data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Pressure channel output codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Temperature channel output codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Diagnostic Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Signal out of range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Diag1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Diag2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
EEPROM Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Definition of Pressure signal path latency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
External temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Linearization of the external temperature sensor transfer function . . . . . . . . . . . . . . . . . . . . . . . . .17
Accuracy for NTC signal processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2
2.1
2.2
2.3
Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Application circuit example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Application circuit example for EMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Datasheet
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KP276C1505
Digital Absolute Pressure Sensor
Table of contents
2.4
2.5
Operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3
3.1
3.2
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
PG-DSOF-8-162 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Identification code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Datasheet
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KP276C1505
Digital Absolute Pressure Sensor
Functional description
1
Functional description
1.1
Pin configuration
Figure 1 shows the pin configuration.
NCS
1
8
GND
CLK
2
7
INNTC
SDI
3
6
SENTOUT
SDO
4
5
VDD
Figure 1
Pin configuration (top view, figure not to scale)
1.2
Pin description
Table 1 shows the pin description.
Table 1
Pin description
Pin No.
Name
Function
Comment
1
NCS
Not-Chip-Select (active-low)
Communication is enabled when NCS is low1)
2
CLK
Serial Clock
External clock for serial communication1)
3
SDI
Serial Data In
Serial data input (e.g. from a controller)1)
4
SDO
Serial Data Out
Tri-state serial data output1)
5
VDD
Supply voltage
–
6
SENTOUT
SENT output
Digital Output of the SENT Interface
7
NTCIN
NTC Input
Input pin for an external NTC
8
GND
Ground
–
1
SPI pins (Pin No. 1 - Pin No. 4) are used only during calibration and test. It is recommended to leave these
pins floating in the application.
Datasheet
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KP276C1505
Digital Absolute Pressure Sensor
Functional description
1.3
Block Diagram
Figure 2 shows the functional block diagram.
Pressure
Cells
NCS
Normal Mode/
Diagnosis Mode
Digital
MUX
NTC
ADC
Signal
Processing
NTC Conditioning
Digital Core
(iSM)
SPI
Interface
CLK
SDI
SDO
Temperature
Compensation
Voltage
Regulator
VDD
analog
digital
ROM
VDDA
VDDD
Buffer Amplifier
(Interface
Driver)
EEPROM
Interface
Reset
SENTOUT
EEPROM
GND
Figure 2
Functional block diagram
1.4
Transfer function pressure
The KP276C1505 device is fully calibrated on delivery. The sensor has a linear transfer function between the
applied pressure and the digital output signal.
Output signal [LSB]
4088
3896
3000
Zo
om
2000
1000
193
1
0 10
60
100
140
180
220
Operating pressure range
Figure 3
260
300
340
380
Pressure [kPa]
Pressure transfer function
Clamping
The output signal for pressure is limited internally to clamping level low (output code 1) and clamping level
high (output code 4088).
Datasheet
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KP276C1505
Digital Absolute Pressure Sensor
Functional description
1.4.1
Pressure transfer function characteristics
The following calibration is adjusted with the parameters Sp and offsp:
pamb =
Table 2
outp − offsp
Sp
Pressure transfer function characteristics
Output Code
Pressure
Gain and Offset
Symbol
Values
Unit
Symbol
Values
Unit
Symbol
Value
Unit
pIN,1
10
kPa
LSBOUT,1
193
LSB
Sp
12.77
LSB/kPa
pIN,2
300
kPa
LSBOUT,2
3896
LSB
offsp
65.31
LSB
Pressure accuracy
8
2.76
7
2.41
6
2.07
5
1.72
4
1.38
3
1.03
2
0.69
1
0.34
-40
0
85
Relative error [%FSS]
Absolute error [kPa]
1.4.2
150
Temperature [°C]
Figure 4
Datasheet
Accuracy for pressure acquisition
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KP276C1505
Digital Absolute Pressure Sensor
Functional description
1.5
Transfer function temperature
Output signal [LSB]
2400
2000
1785
1600
Zo
1200
om
800
400
265
0
-50 -40
0
50
100
150
200
Temperature [°C]
Operating temperature range
Operating peak temperature range
Figure 5
Temperature transfer function
1.5.1
Temperature transfer function characteristics
The following calibration is adjusted with the parameters ST and offsT:
Tamb =
Table 3
outT − offsT
ST
Temperature transfer function characteristics
Temperature
Output Code
Gain and Offset
Symbol
Values
Unit
Symbol
Values
Unit
Symbol
Value
Unit
TIN,1
-40
°C
LSBOUT,1
265
LSB
ST
8.0
LSB/°C
TIN,2
170
°C
LSBOUT,2
1945
LSB
offsT
585.2
LSB
Datasheet
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KP276C1505
Digital Absolute Pressure Sensor
Functional description
1.6
SENT interface
The SENT interface enables communication according to the SENT (Single Edge Nibble Transmission)
specification. The SENT protocol specifies the transmission of information in a series of pulses with data
encoded as falling edge to falling edge periods. Each following pulse is called a nibble. The SENT interface
transmits messages organized in frames. Each frame consists of several pulses which are delimited by falling
edges. Each falling edge marks the start of a new nibble.
•
KP276C1505 SENT configuration shorthand definition: SENT2016-03.0us-6dn-ppc(282.0)-esp-A.5
1.6.1
Physical layer
voltage
The physical layer provides the method of transferring digital data encoded as time between two falling edges
of a signal through the communication medium. It consists of power, ground and the signal wire (see Figure
16).
The basic unit of time for the SENT interface is called a clock tick. The transmission bit rate depends on the data
value sent and the sensor clock tolerance. The shortest length of a nibble pulse consists of 12 ticks (nominally
36 µs), the maximum length is 27 ticks (nominally 81 µs).
Figure 6 shows the physical layer specification of a nibble.
VOH
3.8 V
1.1 V
VOL
tfall
time
trise
>4 ticks
n ticks + Δtfall
Figure 6
Physical layer specification of a nibble
1.6.2
Data link layer
The SENT interface has two channels for transmitting information:
• Fast channel
• Slow channel
The fast channel represents the information transmitted in the data pulses of the SENT frame. Within a single
SENT frame a full pressure code and full NTC code is transmitted.
The slow channel represents the information transmitted within the status and serial communication nibble.
On this channel information is transmitted over several SENT frames (4 bits per SENT frame). This information
consists of diagnostic codes and serial messages.
The SENT frame starts with a synchronization and calibration pulse which is used by the receiver to synchronize
with the frame and to create a reference for the length measurement of the following nibbles.
The synchronization pulse is followed by a status and serial communication nibble. The value coded in this
nibble represents a series of 4 bits. While bit #0 and bit #1 are reserved, bit #2 and bit #3 are used to
communicate serial messages.
Datasheet
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KP276C1505
Digital Absolute Pressure Sensor
Functional description
The message transmitted by the KP276C1505 contains two fast channels. Each channel is segmented in 3 data
nibbles; every nibble includes 4 bits. The 12-bit pressure information is transmitted by the first fast channel, the
12-bit temperature information of the NTC by the second fast channel.
LSN
MSN
Temperature data nibble 2
MidN
12 – 27
ticks
12 –128
ticks
Time
Pause pulse
LSN
12 – 27 12 – 27
ticks
ticks
Seed value: 0101
Polynomial: x4+x3+x2+1
12 – 27
ticks
Temperature data nibble 1
MidN
12 – 27
ticks
Pressure data nibble 3
MSN
Pressure data nibble 2
Synchronization pulse
Status & Communication nibble
12 – 27 12 – 27
ticks
ticks
Pressure data nibble 1
12 – 27
ticks
56 ticks
2nd fast channel
CRC nibble
(Calculation based on SAE J2716)
1st fast channel
Temperature data nibble 3
VSENT
846 µs
MSN: Most significant nibble (Bit 11:8)
MidN: Middle nibble (Bit 7:4)
LSN: Least significant nibble (Bit 3:0)
Figure 7
Message transmission
The pause pulse is used to create a SENT transmission with a constant frame length of 282 clock ticks (846 µs).
1.6.2.1
Nibble specification
A nibble contains 4-bit data content. The length of a nibble defines the content of the 4 bits. The global timing
of a nibble is based on ticks. The length of a tick is specified as 3 µs.
The following formula defines the number of ticks (nticks) based on the nibble content (datanibble):
Figure 8 shows the nibble timing.
nticks = 12 + datanibble
0
>4
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
ticks
0
>12
36
39
42
45
48
51
54
57
60
63
66
69
72
75
78
81
time [µs]
0d
1d
2d
3d
4d
5d
6d
7d
8d
9d
10d
11d
12d
13d
14d
15d
nibble value
0000b
Figure 8
Datasheet
0001b
0010b
0011b
0100b
0101b
0110b
0111b
1000b
1001b
1010b
1011b
1100b
1101b
1110b
1111b
Nibble timing
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KP276C1505
Digital Absolute Pressure Sensor
Functional description
1.6.2.2
Status and communication nibble
This nibble is reserved to enable the sensor to transmit different information such as part numbers or error
code information. The nibble is defined in the following table:
Table 4
Status nibble description
Status Nibble Bit
Function
0
Fast channel-1 error flag
1
Fast channel-2 error flag
2
Serial message bit: Serial message data bit
3
Serial message bit: Serial message data bit and indicates the start of a serial
message
The serial message channel (slow message channel) is implemented as enhanced serial message format.
1.6.2.3
Enhanced serial message format
Bit #2 and #3 of the status and communication nibble are used for serial data transmission. A serial message
stretches over 18 consecutive SENT data messages. All 18 messages must be successfully received for the serial
value to be valid.
The frame start of a serial message is indicated by the unique pattern “1111110” in bit #3 of the status and
communication nibble, Figure 10. The first “1” in a series of six “1” (after a “0”) indicates the first nibble of a
serial message. Serial data bit #3 of serial communication nibble 1 - nibble 6 are set to “1”, Serial data bit #3 of
serial communication nibbles 7, 13 and 18 are set to “0”.
The serial message contains 20 bits of payload data. The communication is defined by the configuration bit
(serial data bit #3, serial communication nibble No. 8), configuration bit = 0”:
•
12-bit data and 8-bit message ID
Sync
Status
Status
...
SENT Message 3
Sync
Pause
Pulse
Status
Data 2
Sync
Data 1
SENT Message 2
CRC
Sync
Status
SENT Message 1
...
Status &
Comm.
Nibble
Bit 3 2 1 0
Reserved
Serial Communication
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Nibble Receive No.
Serial Data (bit #3)
1 1 1 1 1 1 0 C 8-bit ID (7-4) 0 8-bit ID (3-0) 0
Serial Data (bit #2)
Figure 9
6-bit CRC
12-bit data field
Construction of enhanced serial data message from 18 SENT messages
All data (data field, message ID and CRC) that is transmitted in the serial message channel is sent in the order
MSB to LSB.
Datasheet
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KP276C1505
Digital Absolute Pressure Sensor
Functional description
Configuration bit
8-bit message ID
ID7
C
(MSB)
ID6
ID5
ID4
ID3
ID2
ID1
ID0
(LSB)
Serial Communication
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Nibble Receive No.
Serial Data (bit #3)
1 1 1 1 1 1 0 0 8-bit ID (7-4) 0 8-bit ID (3-0) 0
6-bit CRC
Serial Data (bit #2)
CRC5
(MSB)
CRC4
CRC3
CRC2
CRC1
CRC0
(LSB)
12-bit data field
D11
(MSB)
D10
6-bit CRC
Figure 10
Datasheet
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
(LSB)
12-bit data
Enhanced serial message format with 12-bit data field and 8-bit message ID
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KP276C1505
Digital Absolute Pressure Sensor
Functional description
1.6.2.4
Enhanced serial message data
The following 28 serial messages are transmitted over the slow channel and continuously repeated:
Table 5
Slow message channel data
Messag Message ID
e
Number
Definition
12-bit data
EEPROM
programmable
1
$01
Diagnostic error codes
–
–
2
$03
Sensor type Channel 1/2 Pressure/
Temperature
0x007
no
3
$04
Configuration Code
0x001
no
4
$05
Manufacturer Code
0x056
no
5
$06
SENT standard version
0x004
no
6
$07
Fast channel 1 characteristic X1, (X1=pIN,1)
0x053
yes
7
$08
Fast channel 1 characteristic X2, (X2=pIN,2)
0x0F4
yes
8
$01
Diagnostic error codes
–
–
9
$81
Defined by OEM/Supplier
0x000
no
10
$23
Supplementary data channel #4,1, reference 0x000
temperature (NTC temperature)
no
11
$09
Fast channel characteristic Y1, default
0x0C1
no
12
$0A
Fast channel characteristic Y2, default
0xF38
no
13
$29
Sensor ID #1
14
$80
Defined by OEM/Supplier
0x000
no
15
$01
Diagnostic error codes
–
–
16
$2A
Sensor ID #2
yes
17
$2B
Sensor ID #3
yes
18
$2C
Sensor ID #4
yes
19
$82
OEM/Supplier
0x000
no
20
$90
OEM part number
0x590
yes
21
$91
OEM part number
0x66B
yes
22
$01
Diagnostic error codes
–
–
23
$92
OEM part number
0x590
no
24
$93
OEM part number
0x550
no
25
$94
OEM part number
0x951
yes
26
$95
OEM part number
0x000
yes
27
$96
OEM part number
0x000
yes
28
$97
OEM part number
0x000
yes
yes
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
01 03 04 05 06 07 08 01 81 23 09 0A 29 80 01 2A 2B 2C 82 90 91 01 92 93 94 95 96 97
1
2
3
4
Figure 11
Datasheet
ESM cycle
12
Revision 1.1
2019-11-11
KP276C1505
Digital Absolute Pressure Sensor
Functional description
1.6.3
Pressure channel output codes
Table 6 gives an overview about the pressure channel data content.
Table 6
Pressure channel data content
Code [dec]
Code [bin]
Data Nibble 1
Data Nibble 2
Data Nibble 3
Description
0
0000 0000 0000
12 ticks
12 ticks
12 ticks
Invalid value
1
0000 0000 0001
12 ticks
12 ticks
13 ticks
Clamping low
2
0000 0000 0010
12 ticks
12 ticks
14 ticks
Min. pressure output
...
...
...
...
...
...
4087
1111 1111 0111
27 ticks
27 ticks
19 ticks
Max. pressure output
4088
1111 1111 1000
27 ticks
27 ticks
20 ticks
Clamping high
4089
1111 1111 1001
27 ticks
27 ticks
21 ticks
Invalid value
4090
1111 1111 1010
27 ticks
27 ticks
22 ticks
Diagnostic error
4091
1111 1111 1011
27 ticks
27 ticks
23 ticks
Invalid value
4092
1111 1111 1100
27 ticks
27 ticks
24 ticks
Invalid value
4093
1111 1111 1101
27 ticks
27 ticks
25 ticks
Invalid value
4094
1111 1111 1110
27 ticks
27 ticks
26 ticks
Invalid value
4095
1111 1111 1111
27 ticks
27 ticks
27 ticks
Invalid value
Table 7
Error indication for pressure channel
Pressure kPa
Fast channel 1 LSB
Slow channel ID$01 Status Nibble Bit 0
Description
P < -4.9
1
002H
1
Clamping low
-4.9 ≤ P < 10
2 ≤ code ≤ 192
002H
0
Reduced signal
accuracy
10 ≤ P ≤ 300
193 ≤ code ≤ 3896
000H
0
Signal range
300 < P ≤ 314.9
3897 ≤ code ≤ 4087
001H
0
Reduced signal
accuracy
314.9 < P
4088
001H
1
Clamping high
Note:
Datasheet
Status Nibble Bit #0 is calculated at start of every frame. Status value for slow channel is calculated at
start of every slow channel status message (ID$01).
13
Revision 1.1
2019-11-11
KP276C1505
Digital Absolute Pressure Sensor
Functional description
1.6.4
Temperature channel output codes
Table 8 gives an overview about the temperature channel data content.
Table 8
Temperature channel data content
Code [dec]
Code [bin]
Data Nibble 3
Data Nibble 2
Data Nibble 1
Description
0
0000 0000 0000
12 ticks
12 ticks
12 ticks
Initialization
1
0000 0000 0001
12 ticks
12 ticks
13 ticks
Clamping low
(-73°C)
...
...
...
...
...
...
185
0000 1011 1001
12 ticks
23 ticks
21 ticks
Min.
temperature2)
(-50°C)
...
...
...
...
...
...
2025
0111 1110 1001
19 ticks
26 ticks
21 ticks
Max.
temperature2)
(180°C)
...
...
...
...
...
...
4088
1111 1111 1000
27 ticks
27 ticks
20 ticks
Clamping high
(438°C)
4089
1111 1111 1001
27 ticks
27 ticks
21 ticks
Invalid value
4090
1111 1111 1010
27 ticks
27 ticks
22 ticks
Diagnostic error
4091
1111 1111 1011
27 ticks
27 ticks
23 ticks
Invalid value
4092
1111 1111 1100
27 ticks
27 ticks
24 ticks
Invalid value
4093
1111 1111 1101
27 ticks
27 ticks
25 ticks
Invalid value
4094
1111 1111 1110
27 ticks
27 ticks
26 ticks
Invalid value
4095
1111 1111 1111
27 ticks
27 ticks
27 ticks
Invalid value
Table 9
Error indication for temperature channel
Temperature2) °C
Fast channel 2 LSB
Slow channel ID$01 Status Nibble Bit 1
Description
T < -50
code < 185
805H
1
Temperature too low
-50 ≤ T < -40
185 ≤ code ≤ 265
000H
0
Accuracy undefined
-40 ≤ T ≤ 170
266 ≤ code ≤ 1945
000H
0
Temperature range
170 < T ≤ 180
1946 ≤ code ≤ 2025
000H
0
Accuracy undefined
T > 180
code >2025
804H
1
Temperature too
high
Notes:
1.
The output code for fast channel 2 is limited by the NTC resistance value.
2.
Status Nibble Bit #1 is calculated at start of every frame. Status value for slow channel is calculated at start
of every slow channel status message (ID$01).
2
Min/max temperature output depends on external NTC due to limitation of measurement range for NTC
resistance, see Table 18
Datasheet
14
Revision 1.1
2019-11-11
KP276C1505
Digital Absolute Pressure Sensor
Functional description
1.6.5
Diagnostic Error Codes
After power on, a system self check is started. During this initialization phase the following internal sensor
checks are performed:
•
Pressure out of range
•
Signal path check (Diag1)
•
Sensor cell check (Diag2)
•
EEPROM check
The signal range is continuously monitored and “Signal out of range” is transmitted with every SENT frame.
Pressure out of range is transmitted over fast channel1, temperature out of range is transmitted over fast
channel2.
If an internal malfunction is detected, the error code 4090 is transmitted over fast channel1 and fast channel2.
The error type is transmitted over the slow message channel (Diagnostic Error Code), see Table 10. If more than
one error is detected, only the diagnosis code with the highest priority will be sent.
Table 10
Diagnostic Error Codes
Priority3)
Description
Normal Operation/Initialization
Fast Channel1
Code
Fast Channel2
Code
Diagnostic Error
Code
channel1 data
channel2 data
000H no error
Internal Error
5
4090
4090
A05H
Pressure out of range high
4
4088
channel2 data
001H
Pressure out of range low
3
1
channel2 data
002H
Temperature out of range high
2
channel1 data
>2025
804H
Temperature out of range low
1
channel1 data
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