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| NTE739 Integrated Circuit Dual Doubly Balanced Chroma Demodulator with RGB Matrix and Chroma Driver Stages Features: D Luminance Input Provided D Good Chroma Sensitivity-0.36Vp-p Input for 5Vp-p Output D Low Differential Output DC Offset Voltage-0.6V Max D DC Temperature Stability -3mV/C Typ D Negligible Change in Output Voltage Swing and Varying 3.58MHz Reference Input Signal D High Ripple Rejection Achieved with MOS Filter Capacitors D High Blue Output Voltage Swing-10V(p-p) Typ D Blanking Input Provided D Short-Circuit Protected Outputs Absolute Maximum Ratings: Power Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V Chroma Signal Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0V(pk) Reference Signal Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0V(pk) Minimum Load Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2k Luminance Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V(p-p) Blanking Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0V(p-p) Power Dissipation (Package Limitation), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625mW Derate Above TA = +25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0mW/C Operating Temperature Range (Ambient), Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +75C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Electrical Characteristics: Parameter Static Characteristics Quiescent Output Voltage Quiescent Output Current Reference Input DC Voltage Chroma Input DC Voltage Differential Output Voltage Output Temperature Coefficient RL = RL = 3.3k 14.3 15.0 16.3 - - - - - 6.0 6.8 3.6 0.3 3.0 - - - - 0.6 - 19.0 25.5 V mA mA V V V mV/C (VCC = 24V, Vref = 1.0V(p-p), RL = 3.3k, TA = +25C unless otherwise specified) Test Conditions Min Typ Max Unit Electrical Characteristics (Cont'd): Parameter Dynamic Characteristics Detected Output Voltage + (B-Y) - (B-Y) Chroma Input Voltage Luminance Input Resistance Luminance Gain from Pin3 to Outputs (VCC = 24V, Vref = 1.0V(p-p), RL = 3.3k, TA = +25C unless otherwise specified) Test Conditions Min Typ Max Unit Note 1 4.0 4.0 5.0 5.0 0.36 - 0.95 0.5 1.1 7.5 1.0 3.8 106 256 100 - - - 0.7 - - - - - 1.25 4.2 111 264 500 1.0 V(pk) V(pk) VP-P k B-Y Output = 5VP-P, Note 1 At DC At 5MHz - 100 - - - - 0.75 3.5 101 248 - - Blanking Input Resistance 1Vdc 0Vdc k k VP-P VP-P deg deg VP-P VP-P Detected Output Voltage G-Y Output R-Y Output Relative Output Phase B-Y to R-Y Output B-Y to G-Y Output Demodulator Unbalance Voltage Residual Carrier and Harmonics Output Voltage Reference Input Resistance Reference Input Capacitance Chroma Input Resistance Chroma Input Capacitance Adjust B-Y Output to 5VP-P, Luminance Voltage = 23V B-Y Output = 5VP-P, Luminance Voltage = 23V No Chroma Input Voltage and Nominal Reference Signal Input Voltage With Input Signal Voltage, Nominal Reference Signal Voltage, and B-Y Output = 5VP-P - - - - 2.0 6.0 2.0 2.0 - - - - k pF k pF Note 1. With Normal Reference Input Signal Voltage, Adjust Chroma Input Signal Voltage to 1.2V(p-p). Note 2. With Normal Reference Input Signal Voltage, Adjust Chroma Input Signal Voltage Until the Blue Output Voltage = 5V(p-p). The Chroma Input Voltage at this point should be equal to or less than 0.7V(p-p). Pin Connection Diagram G - Y Output 1 R - Y Output 2 Luminance Input 3 B - Y Output 4 DC Ref Input 5 Blanking Input 6 GND 7 14 VCC 13 B - Y Ref Input 12 R - Y Ref Input 11 N.C. 10 Chroma DC Input 9 R - Y Chroma Input 8 B - Y Chroma Input 14 8 1 7 .785 (19.95) Max .300 (7.62) .200 (5.08) Max .100 (2.45) .600 (15.24) .099 (2.5) Min |
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