TDA4850
Overview
- VGA operation fully implemented including alignment-free vertical and E/W amplitude pre-settings
- 4th VGA mode easy applicable (XGA, Super VGA)
- Multi-frequency operation externally selectable
- All adjustments DC-controllable
- Alignment-free oscillators
- Sync separators for video or horizontal and vertical TTL sync levels regardless of polarity
- Horizontal oscillator with PLL1 for sync and PLL2 for flyback
- Constant vertical and E/W amplitude in multi-frequency operation
- DC-coupling to vertical power amplifier (TDA486X or TDA8351)
- Internal supply voltage stabilization with excellent ripple rejection to ensure stable geometrical adjustments. QUICK REFERENCE DATA SYMBOL VP IP Vi sync supply voltage (pin 1) supply current PARAMETER - MIN. 9.2 TYP. 12 40 1 120 - 1.4 - 1.4 1 - - - - - - 1.6 - 1.6 - 60 70 GENERAL DESCRIPTION TDA4850 The TDA4850 provides economical solutions in VGA/XGA and multi-frequency monitors. The IC incorporates the complete horizontal and vertical small signal processing. VGA-dependent mode detection and settings are performed on chip. In conjunction with TDA486X or TDA8351 (vertical output circuits) both ICs offer an extremely advanced system solution. MAX. 16 V UNIT mA V mV V V V V mA mA °C AC-coupled composite video signal with negative-going sync - (peak-to-peak value; pin 9) sync slicing level DC-coupled TTL-compatible horizontal sync signal (peak value; pin 9) slicing level DC-coupled TTL-compatible vertical sync signal (peak value; pin 10) slicing level - 1.7 1.2 1.7 1.2 - - 0 Io V Io H Tamb vertical
