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TDA8722M

I2C-bus programmable modulator for negative video modulation and FM sound

Philips Electronics 

Philips Semiconductors

I2C-bus programmable modulator for

negative video modulation and FM sound

Product specification

TDA8722

FEATURES

• Video amplifier with clamp and white clip circuits

• FM sound modulator

• Asymmetrical and symmetrical RF outputs available

• Symmetrical RF oscillator using only a few external

components

• External adjusting of modulation depth and level of the

sound subcarrier

• I2C-bus receiver for frequency setting and test-mode

selection

• One I2C programmable output port

• On-chip Phase-Locked Loop (PLL) frequency

synthesizer

• On-chip power supply regulator

• Bus switchable oscillator

• On-chip Test Pattern Signal Generator (TPSG).

GENERAL DESCRIPTION

The TDA8722 is a programmable modulator which

generates an RF TV channel from a baseband video

signal and a baseband audio signal in the event of

negative video and FM sound standards (PAL B/G, I, D/K

and NTSC).

It is especially suited for satellite receivers, video

recorders and cable converters. The video carrier

frequency is set exactly to the correct channel frequency

by a PLL synthesizer which is programmed in accordance

with the I2C-bus format.

APPLICATIONS

• Video recorders

• Cable converters

• Satellite receivers.

ORDERING INFORMATION

TYPE

NUMBER

TDA8722T

TDA8722M

PACKAGE

NAME

DESCRIPTION

SO20 plastic small outline package; 20 leads; body width 7.5 mm

SSOP20 plastic shrink small outline package; 20 leads; body width 4.4 mm

VERSION

SOT163-1

SOT266-1

1998 Jun 23

2

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