TDA4887PS Datasheet, PDF (3/68 Pages) NXP Semiconductors – 160 MHz bus-controlled monitor video preamplifier

Philips Semiconductors
160 MHz bus-controlled monitor video
preamplifier
Product specification
TDA4887PS
1 FEATURES
• 160 MHz pixel rate
• 2.7 ns rise time, 3.6 ns fall time
• I²C-bus control
• I²C-bus data buffer for synchronization of adjustments
• 8-bit Digital-to-Analog Converters (DACs)
• 200 ns input clamping pulse
• 4.6 V (p-p) output signal
• Brightness control with grey scale tracking for
user-friendly performance (4 dB more than TDA4885
and TDA4886)
• Brightness control without grey scale tracking for easy
alignment
• On Screen Display (OSD) mixing with 50 MHz pixel rate
• OSD contrast
• Negative feedback for DC-coupled cathodes
• Especially for AC-coupled cathodes
– Bus controlled black level adaptable to post amplifier
type
– Internal positive feedback
– DAC outputs for black level restoration
• Integrated black level storage capacitors
• Beam current limiting
• Subcontrast/contrast modulation
• Adjustable pedestal blanking
• Sync clipping.
2 GENERAL DESCRIPTION
The TDA4887PS is a monolithic integrated RGB
preamplifier for colour monitor systems (e.g. 15" and 17")
with I²C-bus control and OSD. In addition to bus control,
beam current limiting and contrast modulation are
possible. The IC offers brightness control with or without
grey scale tracking for easy alignment. The signals are
amplified to drive commonly used video modules or
discrete solutions. A choice can be made between
individual black level control with negative feedback from
the cathode (DC coupling), or black level control with
positive feedback and three DAC outputs for external
cut-off control (AC coupling).
The circuit can be used with special advantages in
conjunction with the TDA485x monitor deflection IC family.
3 ORDERING INFORMATION
TYPE NUMBER
TDA4887PS
NAME
SDIP24
PACKAGE
DESCRIPTION
plastic shrink dual in-line package; 24 leads (400 mil)
VERSION
SOT234-1
2001 Oct 19
3