EVB90609 evaluation board datasheet DownloadLink 5407

Datasheet EVB90609-x2
Mixed Mode Gyroscope Evaluation Board
Scope
This datasheet describes the schematic, the layout and the use of the series of small breakout
boards for MLX90609 angular rate sensor. It is fully applicable to EVB90609-N2, EVB90609-E2
and EVB90609-R2 boards and can be used as reference for populating the EVB90609 board.
General Description
Figure 1. Top view of EVB90609 board.
EVB90609-x2 PCB is a small board, which
uses the MLX90609 chip in a typical
configuration. It can be directly connected to
customer’s system to ease the development
process. The EVB90609-x2 boards provide
the possibility to work both in analogue and in
digital mode. Both modes are available on
different connector pins of the board. Next to
the MLX90609 chip the board includes
several passive components which are
recommended according to the typical
schematic. The board communicates with
outside world through edge-type 14 pin
connector. Pin names, numbers and functions
are explained in table 1.
Detailed Description
Variants
There are 3 variants of the EVB90609-x2 board, which differ only in MLX90609 chip type used
(see Table 2).
Table 2. Board variants
Board
Order option “xx”
Chip type
Note
EVB90609
N2
MLX90609N2
75 deg/s full range
EVB90609
E2
MLX90609E2
150 deg/s full range
EVB90609
R2
MLX90609R2
300 deg/s full range
For more information about the MLX90609 chip and its operation, check the MLX90609
datasheets at www.melexis.com.
3901190609A
Rev 005
Page 1 of 3
May-09
Datasheet EVB90609-x2
Mixed Mode Gyroscope Evaluation Board
Pinout
Table 1. Pin out of the edge connector
Pin Number
Pin Name
Pin Function
1
VCC
Power pin +5V
2
VCC
Power pin +5V
3
VREF
Internal reference voltage
4
SCLK
Cock for SPI
5
OUTAR
Angular rate output voltage
6
-SS
Slave select for SPI (negative logic)
7
OUTTMP
Temperature output voltage
8
MISO
Master-input-slave-output signal for SPI
9
SLFT1
Self test selection pin 1
10
MOSI
Master-output-slave-input-signal for SPI
11
SLFT2
Self test selection pin 2
12
ERROR
Gyro internal error signalization
13
GND
Ground pin
14
GND
Ground pin
Dimensions
A top view of EVB90609-x2 boards is represented in Figure 1. The dimensions of the boards
are: 28 mm (length) x 18 mm (height) x 3.5 mm (thickness).
Schematics
The electrical schematic of the EVB90609-x2 board is presented at Figure 2 as it is based on
the typical schematic from MLX90609 datasheet.
The value of the capacitor C3 defines the output bandwidth of gyro. The –3dB bandwidth set by
C3 is:
fOUT =0.16 /(ROUT*C3), with ROUT = 200kΩ (typ.)
For instance, with C3=82nF the bandwidth is close to 10Hz.
VCC
C1
100n
R1
10k
SLFT1
SLFT2
R2
10k
SCLK
-SS
MISO
MOSI
ERROR
EDGIDC14
NC5
CASE
SCLK
VDDA
SS
VSSA
MISO
VREF
U1
MOSI
OUTAR
MLX90609BA
TEST
FLT
ERROR
OUTTEMP
SELFTEST
HVIN
28
27
26
25
24
23
22
21
NC13
NC14
NC15
NC16
NC17
NC18
NC19
NC20
ERROR
VREF
OUTAR
OUTTMP
SLFT1
SLFT2
2
4
6
8
10
12
14
C2 100n
VREF
C3
82n
C5 100n
R3
0
OUTAR
OUTTMP
13
14
15
16
17
18
19
20
SCLK
-SS
MISO
MOSI
VDD
GND
NC2
TOPCAP4
TOPCAP5
NC31
TESTOUT
TESTIN
4
3
2
1
32
31
30
29
VCC
5
6
7
8
9
10
11
12
VCC
J1
1
3
5
7
9
11
13
Figure 2. Electrical schematic of the MLX90609 boards
3901190609A
Rev 005
Page 2 of 3
May-09
Datasheet EVB90609-x2
Mixed Mode Gyroscope Evaluation Board
Component placement and PCB Layout
Component placement at the board is presented at Figure 3.
Figure 3. Component placement
The layouts of the top and bottom side of the board are presented at Figure 4.
Figure 4. Board top (blue) and bottom (red) side layout.
Revision history
Rev.001 from July 2007. Initial release.
Rev.002 from January 2008. Figure 2 Figure 3 and Figure 4 were adapted. Text at page 2 was
corrected to reflect adapted board.
Rev.003 typos, naming conventions, order information
Rev.004 typo: R3->R2
Rev.005 typo: 50Hz -> close to 10Hz
3901190609A
Rev 005
Page 3 of 3
May-09