STV0502

CCD SENSORS ANALOG PROCESSOR IC

October 1998

.

SERIAL BUS CONTROL

VIDEO

.

CORRELATED DOUBLE SAMPLING OF THE

CCD SIGNAL

.

DIGITALLY CONTROLLED VARIABLE AMPLI-

FIER AND BLACK CLAMP LEVEL

.

8 BITS PIXEL RATE ADC

AUDIO

.

MICROPHONE PREAMP WITH SWITCHABLE

AGC (RANGE 34dB - 60dB) OR FIXED GAIN

DESCRIPTION

The chip integrates the analog functions needed in

a CCD Video Camera, more particularly for video-

conferencing purpose.

The CCD signal is sampled, amplified to a useful

level and digitized by an 8 bits ADC. The gain of the

amplifier and the black level clamp can be adjusted

by a serial bus.

The audio microphone preamplifier allows a micro-

phone to be connected to the chip, which outputs

a differential audio line level signal ready for digital

conversion or straight amplification. The preampli-

fier incorporates an AGC to adapt to the income

signal level. The AGC is switchable ON/OFF by the

serial interface.

TQFP44 Full (10 x 10 x 1.40mm)

(Plastic Quad Flat Pack)

ORDER CODE : STV0502

33

32

31

30

29

1

2

3

4

5

40

41

42

43

44

18 19 20 21 22

DATA6

DATA5

DATA4

AF_OUT-

AF_OUT+

V

CC

CAGC

8

9

10

11

7

6

16 17

14 15

12 13

28

27

26

25

24

23

39 38 37 36 35 34

SCLK

ADC_CLOCK

GND

MICRO_IN

MIC_REF

ACC

V

BIAS

DATA7

NOT USED

NOT USED

V

SS

VAGCIN

CDS_OUT

CDS_REF

CDS_IN

PIN CONNECTIONS

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