1997 Jun 23

13

Philips Semiconductors

Product specification

Video processor with automatic cut-off control

TDA4688

RGB outputs (pins 24, 22 and 20; positive going output signals; peak drive limiter set = 3FH); note 4

nominal output signals

(black-to-white value)

−

2.0

−

V

maximum output signals

(black-to-white value)

3.0

−−

V

spread between RGB output signals

−−

10

%

minimum output voltages

−−

0.8

V

maximum output voltages

6.8

−−

V

voltage of cut-off measurement line

equivalent to voltage during

ultra-black

output clamping;

BCOF = 1

2.3

2.5

2.7

V

internal current sources

−

5.0

−

mA

output resistance

−

20

−Ω

Frequency response

frequency response of Y path

(from pin 8 to pins 24, 22 and 20)

f = 10 MHz

−−

3dB

frequency response of CD path

(from pins 7 to 24 and 6 to 20)

f=8MHz

−−

3dB

(from pins 10 to 24, 11 to 22 and

12 to 20)

f = 10 MHz

−−

3dB

(from pins 2 to 24, 3 to 22 and

4 to 20)

f = 10 MHz

−−

3dB

Sandcastle pulse detector (pin 14)

sandcastle pulse voltage

for horizontal and vertical blanking

pulses

2.0

2.5

3.0

V

for horizontal pulses (line count)

4.0

4.5

5.0

V

for burst key pulses (clamping)

7.6

−

sandcastle pulse voltage

for horizontal and vertical blanking

pulses

2.0

2.5

3.0

V

for burst key pulses

4.0

4.5

output current

−−

−100

µA

leading edge delay of the clamping

pulse

−

1.5

−µs

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT