TDA8501 datasheet(17/30 Pages) PHILIPS

17 / 30 page

April 1993

Philips Semiconductors

Preliminary speciﬁcation

PAL/NTSC encoder

TDA8501

NOTCH (pin 18)

output resistance

1750

2000

2500

Ω

VCC

DC voltage level

−

2.5

−

Isink

maximum sink current

350

−−

µA

Chrominance output (pin 14)

Isink

maximum sink current

700

−−

µA

Isource

maximum source current

1000

−−

µA

output resistance

−

120

−Ω

∆VDC

variation of DC voltage level

when chrominance signal is

blanked and chrominance signal is

not blanked

−−

5mV

PAL mode; pin 17 = 0 V

chrominance output voltage

(peak-to-peak) amplitude burst

480

600

720

ratio: chrominance

(75% RED)/burst

2.1

2.2

2.3

NTSC mode; pin 17 = 5 V

chrominance output voltage

(peak-to-peak) amplitude burst

460

570

680

ratio: chrominance

(75% RED)/burst

2.1

2.2

2.3

carrier suppression when

input-signals are 0 V

0 dB = 1330 mV

(peak-to-peak)

−

phase accuracy (difference

between 0 and 90 degree carriers)

−−

degrees

LPF

Low-pass ﬁlters

see Figs 3 and 4

BPF

Band-pass ﬁlters

see Figs 5 and 6

noise level (RMS value)

−−

4mV

burst phase; 0 degrees = phase U carrier

PAL mode

−±135

−

degrees

NTSC mode

−

180

−

degrees

+ SYNC cross talk

(0 to 6 MHz)

0 dB = 1400 mV

(peak-to-peak)

−−−60

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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