TDA8758G 查看數據表（PDF） - Philips Electronics

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TDA8758G

YC 8-bit low-power analog-to-digital video interface

Philips Electronics 

Philips Semiconductors

YC 8-bit low-power analog-to-digital

video interface

Product specification

TDA8758

FEATURES

• Two 8-bit ADCs:

– one Luminance or CVBS channel

– one Chrominance channel

• Sampling rate up to 32 MHz

• Binary or two's complement 3-state TTL outputs for

each channel

• Internal reference voltage regulator

• TTL-compatible digital inputs and outputs

• Power dissipation of 530 mW (typical)

• Input selector circuit (five selectable video inputs for

CVBS or YC processing)

• Peak white enable input

• Clamp and Automatic Gain Control (AGC) functions for

Y/CVBS channel (clamping on code 64 and Peak White

level control at code 255)

• Clamp function for C channel (code 128)

• No sample-and-hold circuit required.

APPLICATIONS

• Video signal decoding

• Digital picture processing

• Frame grabbing

• Multimedia with the Philips Desktop Video chip set (and

especially SAA7196 multistandard decoder and scaler).

GENERAL DESCRIPTION

The TDA8758 is an 8-bit video high-speed low-power

analog-to-digital conversion (ADC) interface for YC and

CVBS signal processing. It converts 1-of-3 CVBS input

signals or 1-of-2 YC input signals into binary or two’s

complement words at a sampling rate of 32 MHz.

All analog signal inputs are digitally clamped and an ADC

interface is provided on the Y/CVBS channel. A fast

precharge on clamp and AGC is provided for start-up.

All digital inputs and outputs are TTL compatible.

QUICK REFERENCE DATA

SYMBOL

VCCA

VCCD

VCCO

ICCA

ICCD

ICCO

ILE

DLE

EB

fclk(max)

B

αct

Ptot

PARAMETER

CONDITIONS

analog supply voltage

digital supply voltage

output stages supply voltage

analog supply current

digital supply current

output supply current

DC integral linearity error

CL = 15 pF

DC differential linearity error

effective bits

(from video input to digital outputs)

maximum clock frequency

fclk = 32 MHz;

fi = 4.43 MHz

maximum −3 dB bandwidth

(input preamplifier)

full-scale; 0 dB gain

crosstalk between Y and C channels

and each video input

total power dissipation

MIN.

4.75

4.75

4.75

−

−

−

−

−

−

TYP.

5.0

5.0

5.0

59

28

19

±0.75

±0.4

7.1

MAX.

5.25

5.25

5.25

70

40

28

±1.5

±1.0

−

UNIT

V

V

V

mA

mA

mA

LSB

LSB

bits

30

32

−

−

15

−

MHz

MHz

−

−63

−55

dB

−

530

724

mW

ORDERING INFORMATION

TYPE

NUMBER

TDA8758G

NAME

LQFP48

PACKAGE

DESCRIPTION

plastic low profile quad flat package; 48 leads; body 7 × 7 × 1.4 mm

VERSION

SOT313-2

1996 Feb 01

2

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