TDA4670

INTEGRATED CIRCUITS DATA SHEET TDA4670 Picture Signal Improvement (PSI) circuit Product specification Supersedes data of May 1991 File under Integrated Circuits, IC02 1996 Dec 11 Philips Semiconductors Product specification Picture Signal Improvement (PSI) circuit FEATURES Luminance signal delay from 20 to 1100 ns (minimum step 45 ns) Luminance signal peaking with selectable symmetrical overshoots 2.6 or 5 MHz peaking centre frequency and selectable degree of peaking (−3, 0, +3 and +6 dB) Selectable noise reduction by coring Handles negative and positive colour-difference signals Selectable Colour Transient Improvement (CTI) to decrease the colour-difference signal transient times to those of the high frequency luminance signals Selectable 5 or 12 V sandcastle input voltage All controls selected via the I2C-bus Timing pulse generation for clamping and delay time control synchronized by sandcastle pulse Automatic luminance signal delay correction using a control loop Luminance and colour-difference input signal clamping with coupling capacitor 4.5 to 8.8 V supply voltage range Minimum of external components required. QUICK REFERENCE DATA SYMBOL VP IP(tot) td(Y) Vi(VBS) Vi(CD)(p-p) total supply current Y signal delay time composite Y input signal (peak-to-peak value, pin 16) colour-difference input signal (peak-to-peak value) ±(R − Y) on pin 3 ±(R − Y) on pin 7 GY GCD Tamb gain of Y channel gain of colour-difference channel operating ambient tempera...