TDA8722 Datasheet, PDF (2/28 Pages) NXP Semiconductors – I2C-bus programmable modulator for negative video modulation and FM sound

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