MLX90255

Linear Optical Array

MLX90255 Linear Optical Array

Page 2 of 5

Rev 1.0 31-May-01

MLX90255 Pin Description

Pin Number

Symbol

Description

SMD8

GLP5

1

1

SI

Serial Input. SI defines the end of the integration time and the start of the data out

sequence

2

2

CLK

Clock. The clock controls the charge transfer, pixel output and reset (together with SI)

3

3

A0

Analog output

4

4

VDD

Supply Voltage, for both analog and digital circuits

5, 6, 7, 8

5

GND

Ground. All GND pins are referenced to the substrate.

Schematics

Functional Description

The demo board mainly consists of the following

blocks:

•

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

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

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

5V

5V

5V

5V

5V

5V

XTAL1

INT2

RESETB

INT4

XTAL2

INT3

INT1

FREQ1

FREQ2

FREQ3

FREQ4

CLK

SI

LED

CLK

SI

VOUTB

POWER

LED

SI

CLK

VOUTB

CLK

VOUTA

SI

VOUTA

U1

AT90S2313

1

3

4

5

2

6

7

8

9

10

20

19

18

17

15

14

13

12

11

16

RESET

PD1(TxD)

XTAL2

XTAL1

PD0(RxD)

PD2(INT0)

PD3(INT1)

PD4(T0)

PD5(T1)

GND

Vcc

PB7[SCK)

PB6[MISO)

PB5(MOSI)

PB3(OC1)

PB2

PB1[AIN1)

PB0[AIN0)

PD6(ICP)

PB4

C1

100n

R1

10k

Y1

10MHz

C3

22p

C2

22p

SW2

SW Int

2

5

1

6

3

4

SW1

SW Freq

2

5

1

6

3

4

R5

330

D2

LED

R3

330

JP2

CONN PWR 2-H

1

2

JP1

90255 External

1

2

3

4

5

D4

1N4001

1

2

C4

220n

TP4

TEST POINT

1

TP3

TEST POINT

1

TP2

TEST POINT

1

R2

680

U3

90255 SMD

1

2

3

4

5

SI

CLK

VOUT

VDD

VSS

D3

LED

R4

1k

TP1

5V Supply

1

TP6

TEST POINT

1

TP5

GND

1

C5

100n

U2 C78L05/TO92

3

1

IN

OUT

C8

100n

10uF/16V

+

C6

22uF/16V