ST STEVAL-C34KAT1 User manual

Introduction
The STEVAL-C34KAT1 is a multisensing expansion kit that includes the STEVAL-C34AT01 expansion board and a flex cable.
The small form factor and the accurate design allow a precise measurement of vibrations up to the sensor bandwidth (6 kHz) as
well as of the temperature.
The IIS3DWB vibration sensor is soldered at the center of the small 25 x 25 mm board. The STTS22H temperature sensor is
placed on the PCB side and is thermally coupled to the PCB bottom exposed pad through vias.
The expansion board can be mounted on the equipment for the vibration analysis using the four holes or the double-sided
adhesive tape. This board is compatible with the STWIN.box kit (STEVAL-STWINBX1).
Figure 1. STEVAL-C34KAT1 expansion kit
Getting started with the STEVAL-C34KAT1 vibrometer and temperature sensor
expansion kit
UM3021
User manual
UM3021 - Rev 2 - February 2023
For further information contact your local STMicroelectronics sales office. www.st.com

1Features
• Kit content:
– a STEVAL-C34AT01 multisensing expansion board (25x25mm) with a 34-pin board-to-FPC
connector
– a 34-pin flex cable
• Ideal plug-in for the STEVAL-STWINBX1 evaluation board
• Ultra-wide bandwidth (up to 6 kHz), low-noise, 3-axis digital vibration sensor (IIS3DWB):
– Ultra-wide and flat frequency response range: from DC to 6 kHz (±3 dB point)
– Low-pass or high-pass filter with a selectable cut-off frequency
– 1.1 mA with the three axes at full performance
– Extended temperature range from -40 to +105°C
• Low-voltage, ultra-low-power, 0.5°C accuracy I²C/SMBus 3.0 temperature sensor (STTS22H)
– Programmable thresholds through an interrupt pin
– Ultra-low current: 1.75 µA in one-shot mode
– Operating temperature -40 to +125°C
• Exposed pad on the bottom side to improve the thermal coupling for the temperature sensor
• 2.1 to 3.3 V power supply input
UM3021
Features
UM3021 - Rev 2 page 2/17

2Precautions for use
Important: This kit is not immune to indirect electrostatic discharges. During the ESD test, the kit has obtained level C. This
means that the expansion board has not been damaged during the test, but the intervention of the operator was
necessary to reset it. When an electrostatic discharge is applied to an adjacent object, the board might interrupt
its functioning. In this case, the intervention of an operator is required to reset the board (that is, to unplug and
replug the power supply line).
If the board is attached to a STEVAL-STWINBX1 (STWIN.box), you can control the power supply of the external
34-pin connector via software, by leveraging the power switch functionality of the STBC02 battery charger IC.
UM3021
Precautions for use
UM3021 - Rev 2 page 3/17

3How to use the kit
The STEVAL-C34KAT1 expansion board can be used with the STEVAL-STWINBX1 kit (STWIN.box).
The device can be attached to the STWIN.box using the provided flex cable, through the 34-pin connectors
available on both platforms.
Figure 2. Expansion board and flex cable
To plug the flex cable onto the STWIN.box, remove the plastic case cover.
Figure 3. Plugging the flex cable onto the STWIN.box
You can then remount the cover, as it leaves enough space for the flex cable.
Figure 4. Final setup
The easiest way to read data from the STEVAL-C34KAT1 sensors is to flash the STWIN.box with the FP-SNS-
DATALOG2 function pack. The firmware package provides a ready to use, precompiled binary to perform sensor
data acquisition.
UM3021
How to use the kit
UM3021 - Rev 2 page 4/17

Note: Please be careful when you remove the flex cable as you may damage it. The safest way to remove it is by
pulling it next to the connectors using tweezers.
Figure 5. How remove the flex cable
UM3021
How to use the kit
UM3021 - Rev 2 page 5/17

4Adhesive tape
The kit provides a few samples of 3M™ 9088 high performance, double coated tape. These samples can be used
to mount the board on the equipment for vibration analysis.
Alternatively, you can mount the board through the holes located at each corner of the PCB.
Figure 6. Adhesive tape
The small form factor of the PCB ensures no resonances and a flat frequency response for the complete
bandwidth of the sensor (up to 6 kHz).
UM3021
Adhesive tape
UM3021 - Rev 2 page 6/17

5Schematic diagrams
Figure 7. STEVAL-C34KAT1 circuit schematic: STEVAL-C34AT01
Vibrometer
I2C Addr: 0111000b
Temperature
VDD
VDD
VDD
VDD
34-pin expansion
connector
Orientation: the odd pins should be on the PCB side
VDD
VDD
VDD
VDD
R20R
SB7NC
C4
10uF GND
U2
SDA 6
STTS22HTR
4
Addr
SCL 1
3VDD
GND
52
INT
EXP
7
CN1
1 2
CON34-Plug
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
29 30
31 32
33 34
SB80R
R60R
SB2NC
R1
7.5k
R3 0R
C2
100nF
SB1NC
R70R
U1 IIS3DWB
6GND1 5VDDIO
4INT1
SCx
3SDx
2
1SDO/SA0
VDD 8
9
INT2
10
OCS_Aux
11
SDO_Aux
CS 12
SCL 13
7GND2
SDA 14
C3
100nF
SB30R
R4 0R
C1
100nF
SB6
NC
SB5NC
SB40R
R5 0R
C5
330pF
SPI_CS
SPI_CLK
SPI_MOSI
SPI_MISO
I2C_SCL
I2C_SDA
INT_STT
I2C_SCL
SPI_MISO
SPI_MOSI
SPI_CS
INT_DWB
SPI_CLK
INT_STT
I2C_SDA
INT_STT
INT_STT
INT_DWB
INT2_DWB
INT1_DWB
INT1_DWB
INT_STT
INT2_DWB
INT_DWB
UM3021 - Rev 2 page 7/17
UM3021
Schematic diagrams

Figure 8. STEVAL-C34KAT1 circuit schematic: STEVAL-FLTCB01
CON34-Socket
Assembly on bottom
J2
1 2
3
CON34-Header
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
29 30
31 32
33 34
J3
12
3
CON34-Socket
4
56
78
910 1112
1314
1516
1718
1920 2122
2324
2526
2728
2930 31
32
3334
J1
12
34
56
78
910 1112
1314
1516
1718
1920 2122
2324
2526
2728
2930 3132
3334
34 33
32 31
30 29
28 27
26 25
24 23
22 21
20 19
18 17
16 15
14 13
12 11
10 9
8 7
6 5
4 3
2 11
33
31
29
27
25
23
21
19
17
15
13
11
9
7
5
3
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
UM3021 - Rev 2 page 8/17
UM3021
Schematic diagrams

6Bill of materials
Table 1. STEVAL-C34KAT1 bill of materials
Item Q.ty Ref. Part/value Description Manufacturer Order code
1 1
Table 2. Expansi
on board bill of
materials
STEVAL-
C34AT01
Vibrometer and
temperature
expansion board
ST Not available for
separate sale
2 1
Table 3. Flex
cable bill of
materials
STEVAL-
FLTCB01
34-pin, 15 cm
flex cable ST Not available for separate sale
34- 3M 9088 - 25x25
mm, 25x25 mm
3M™ high-
performance,
double coated
tape
3M 9088
Table 2. Expansion board bill of materials
Item Q.ty Ref. Value Description Manufacturer Order code
1 1 CN1
CON34-Plug, 34
positions, SMD,
gold
Connector
socket
Panasonic
Electric Works AXF6G3412A
2 3 C1, C2, C3
100 nF, 0402
(1005 metric), 16
V, ±10%, X7R
Ceramic
capacitors
Murata
Electronics North
America
GRM155R71C104KA8
8J
3 1 C4
10 µF, 0402
(1005 metric), 10
V, ±20%,X5R
Ceramic
capacitor
Samsung
Electro-
Mechanics
America, Inc.
CL05A106MP8NUB8
4 1 C5
330pF, 0402
(1005 Metric),
10%,
CAP CER 330pF
Murata
Electronics North
America
GRM1555C1H331GA0
1D
5 1 R1
7.5 k, 0402
(1005 metric),
1/16 W, ±5%,
SMD
Resistor Yageo RC0402JR-077K5L
6 9
R2, SB3, R3,
SB4, R4, R5, R6,
R7, SB8
0 R, 0402 (1005
metric), SMD Resistors Vishay Dale CRCW04020000Z0ED
70SB1, SB2, SB5,
SB6, SB7
0 ohm, 0402
(1005 metric),
SMD
Resistors (not
mounted) Vishay Dale CRCW04020000Z0ED
8 1 U1
IIS3DWBTR,
VFLGA2.5X3X.8
6 14L P.5
L.475X.25
Ultra-wide
bandwidth, low-
noise, 3-axis
digital vibration
sensor
ST IIS3DWBTR
9 1 U2
STTS22HTR,
UDFN 2X2X.55
6L pitch 0.65
Low-voltage,
ultra-low-power,
0.5°C accuracy
I²C/SMBus 3.0
temperature
sensor
ST STTS22HTR
UM3021
Bill of materials
UM3021 - Rev 2 page 9/17

Table 3. Flex cable bill of materials
Item Q.ty Ref. Part/value Description Manufacturer Order code
1 1 J2
CON34-Header,
34 positions,
SMD, gold
Connector
header
Panasonic
Electric Works AXF5G3412A
2 2 J1, J3
CON34-Socket,
34 positions,
SMD, gold
Connector
sockets
Panasonic
Electric Works AXF6G3412A
UM3021
Bill of materials
UM3021 - Rev 2 page 10/17