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INTEGRATED CIRCUITS DATA SHEET TDA4881 Advanced monitor video controller Preliminary specification File under Integrated Circuits, IC02 November 1992 Philips Semiconductors Preliminary specification Advanced monitor video controller FEATURES · Fully DC controllable · 3 separate video channels · Input black level clamping · White level adjustment for 2 channels only · Brightness control with correct grey scale tracking · Contrast control for all 3 channels simultaneously · Cathode feedback to internal reference for cut-off control, which allows unstabilized video supply voltage · Current outputs for RGB signal currents · RGB voltage outputs to external peaking circuits · Blanking and switch-off input for screen protection · Sync on green operation possible QUICK REFERENCE DATA SYMBOL VP IP Vl(b-w) VO(b-w) IO(b-w) IM B Gnom Gv Cv Vbl Tamb supply current input voltage (black-to-white, pins 2, 5 and 8) output voltage (black-to-white, pins 19, 16 and 13) output current (black-to-white, pins 20, 17 and 14) peak output current (pins 20, 17 and 14) bandwidth nominal gain gain control range for 2 channels (relative to Gnom) contrast control range (relative to Gnom) brightness control range operating ambient temperature range nominal gain -3 dB nominal contrast and nominal gain PARAMETER positive supply voltage (pin 7) CONDITIONS MIN. TYP. 7.2 - - - - - 70 - -4 -20 -80 0 8.0 46 0.7 0.8 50 - - 1 - - - - GENERAL DESCRIPTION TDA4881 The TDA4881 is a monolithic integrated RGB amplifier for colour monitor systems with super VGA performance, intended for DC or AC coupling of the colour signals to the cathodes of the CRT. With special advantages the circuit can be used in conjunction with the TDA4851. MAX. 8.8 56 1.0 - - 100 - - +2 +3 +240 +70 UNIT V mA V V mA mA MHz dB dB dB mV °C ORDERING INFORMATION EXTENDED TYPE NUMBER TDA4881 Note 1. SOT146-1; 1996 November 27. PACKAGE PINS 20 PIN POSITION DIL MATERIAL plastic CODE SOT146(1) November 1992 2 Philips Semiconductors Preliminary specification Advanced monitor video controller TDA4881 Fig.1 Block diagram and basic application circuit for DC and AC coupling. November 1992 3 Philips Semiconductors Preliminary specification Advanced monitor video controller PINNING SYMBOL BRC VI1 GC1 GND VI2 CC VP VI3 HBL CL GC3 FB3 VO3 IO3 FB2 VO2 IO2 FB1 Fig.2 Pin configuration VO1 IO1 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DESCRIPTION brightness control signal input Channel 1 gain control Channel 1 ground signal input Channel 2 contrast control supply voltage signal input Channel 3 horizontal blanking, switch off input clamping, vertical blanking gain control Channel 3 feedback Channel 3 voltage output Channel 3 current output Channel 3 feedback Channel 2 voltage output Channel 2 current output Channel 2 feedback Channel 1 voltage output Channel 1 current output Channel 1 TDA4881 November 1992 4 Philips Semiconductors Preliminary specification Advanced monitor video controller FUNCTIONA