EVB90255 Melexis Inc, EVB90255 Datasheet - Page 2

• Manufacturer Part Number: EVB90255
• Description: EVAL BOARD FOR THE MLX90255
• Manufacturer: Melexis Inc

Specifications of EVB90255

• Sensor Type: Light, Photodiode Array
• Sensing Range: 128 x 1 Pixels
• Interface: Analog
• Sensitivity: 1.7 V @ 10 µW/cm² @ 0.7ms
• Voltage - Supply: 6 V ~ 10 V
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MLX90255
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q3625223A

MLX90255 Pin Description
Pin Number
SMD8
Schematics
Functional Description
The demo board mainly consists of the following
blocks:
MLX90255 Linear Optical Array
JP2
CONN PWR 2-H
CLK
VOUTB
5, 6, 7, 8
2
1
5V regulator with a power-on indication LED
general purpose microcontroller with reset
circuitry and crystal oscillator
2 rotary DIL switches for changing settings
a LED which lights up if the chosen settings
1
2
3
4
1
5V
TP4
TEST POINT
TP2
TEST POINT
D4
1N4001
1
1
R4
1k
GLP5
D3
LED
2
POWER
VOUTA
+
SI
1
2
3
4
5
C6
22uF/16V
3
U2 C78L05/TO92
IN
Symbol
TP3
TEST POINT
TP6
TEST POINT
1
1
OUT
5V
GND
VDD
CLK
R1
10k
C1
100n
A0
SI
1
RESETB
XTAL2
10MHz
+
Y1
C2
22p
C7
10uF/16V
XTAL1
Description
Serial Input. SI defines the end of the integration time and the start of the data out
sequence
Clock. The clock controls the charge transfer, pixel output and reset (together with SI)
Analog output
Supply Voltage, for both analog and digital circuits
Ground. All GND pins are referenced to the substrate.
C3
22p
5V
CLK
SI
LED
C8
100n
10
1
2
3
4
5
6
7
8
9
5V
RESET
PD0(RxD)
PD1(TxD)
XTAL2
XTAL1
PD2(INT0)
PD3(INT1)
PD4(T0)
PD5(T1)
GND
U1
AT90S2313
Page 2 of 5
LED
TP1
TP5
1
1
PB6[MISO)
PB5(MOSI)
PB1[AIN1)
PB0[AIN0)
PB7[SCK)
PB3(OC1)
PD6(ICP)
5V Supply
GND
PB4
PB2
Vcc
The different blocks can easily be found in the
schematic diagram.
The main purpose of the demonstration board is
to provide a specified clock frequency and an
R2
680
20
19
18
17
16
15
14
13
12
11
100n
C5
are out of the device specification
1 on-board MLX90255 sensor (B) and a 5-
pins connector for an external device (A)
test terminals for all important signals
5V
FREQ4
FREQ3
FREQ2
FREQ1
INT4
INT3
INT2
INT1
D2
LED
5V
C4
220n
Linear Optical Array
1
2
3
1
2
3
VOUTA
SW1
SW Freq
SW2
SW Int
MLX90255
VOUTB
R5
330
6
5
4
6
5
4
R3
330
Rev 1.0 31-May-01
SI
CLK
SI
CLK
1
2
3
4
5
90255 External
90255 SMD
JP1
1
2
3
4
5
SI
CLK
VOUT
VDD
VSS
U3