Philips TDA4670 free download

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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 temperature - - - - 0 1.05 1.33 -1 0 - 1.48 1.88 - - 70 PARAMETER supply voltage (pins 1 and 5) MIN. 4.5 31 20 - 5 41 - 450 TYP. GENERAL DESCRIPTION TDA4670 The TDA4670 delays the luminance signal and improves colour-difference signal transients. Additionally, the luminance signal can be improved by peaking and noise reduction (coring). MAX. 8.8 52 1130 640 V UNIT mA ns mV V V dB dB °C ORDERING INFORMATION TYPE NUMBER TDA4670 PACKAGE NAME DIP18 DESCRIPTION plastic dual in-line package; 18 leads (300 mil) VERSION SOT102-1 1996 Dec 11 2 Product specification TDA4670 Fig.1 Block diagram. handbook, full pagewidth 1996 Dec 11 100 nF 2 1 Vref GENERATION Vref I2C-BUS Vref Y delay sandcastle 5 V/12 V Vref CORING 5 MHz -0.5 sandcastle pulse SDA SCL 100 nF 15 10 9 I2C-BUS RECEIVER CTI on/off coring on/off peaking frequency degree of peaking VP = 5 to 8 V BLOCK DIAGRAM 17 Philips Semiconductors SANDCASTLE PULSE DETECTOR BK BK, H + V DELAY TIME CONTROL Y 100 ns 90 ns 16 BLACK LEVEL CLAMP + CORING 11 100 nF 100 nF 2.6 MHz Vref control signal -0.5 5 MHz 2.6 MHz I2C-BUS PEAKING I2C-BUS BLACK LEVEL CLAMP 180 ns +1 Picture Signal Improvement (PSI) circuit 3 90 ns 45 ns 90 ns 100 ns BLACK LEVEL CLAMP 450 ns 180 ns + 100 nF 13 Vref TDA4670 analog switch 12 Y 14 100 nF Vref -(R - Y) 3 10 nF FULL-WAVE RECTIFIER HIGH-PASS FILTER VT BLACK LEVEL CLAMP 4 -(R - Y) I2C-BUS DIFFERENTIATOR BK FULL-WAVE RECTIFIER storage capacitors comparator 6 -(B - Y) analog