NTE982 Integrated Circuit TV Chroma System Description The NTE982 is a monolithic integrated circuit in a 16−Lead DIP type package containing a complete television chroma subcarrier regeneration system. Synchronous detectors are employed to develop the automatic chroma control (ACC) and automatic phase control (APC) voltages. APC and ACC detection is keyed during the horizontal flyback pulse while the subcarrier output is inhibited. The NTE982 television chroma subcarrier regeneration system features improved circuitry to effect a linear relationship between the hue control voltage and the subcarrier output phase. In addition, biasing improvements minimize static and dynamic detector offsets. A 12−volt shunt regulator assures reliable operation despite primary power voltage fluctuations. Features D Linear D−C Hue Control D Phase Locked Oscillator D Keyed APC and ACC Detectors D Internal Shunt Regulator Absolute Maximum Ratings Supply Current, IREG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA Package Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 670mW Derate Above A = +70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3mW/°C Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40°C to +85°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to +150°C Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter Test Conditions Min Typ Max Unit Static Characteristics Regulator Voltage S4 = A, S6 = C 11.3 − 13.1 V Oscillator Current S4 = A, S6 = B 4.4 − 8.1 mA Gate Control Current S4 = B, S6 = B − − 6.4 µA Hue Leakage Current S4 = A, S6 = A − − 32 µA ACC Leakage Current S4 = B, S6 = A − − 30 µA − − 40 µA APC Leakage Current Electrical Characteristics (Cont’d): (TA = +25°C unless otherwise specified) Parameter Test Conditions Min Typ Max Unit − − +300 mV − − −330 mV − − ±450 mV − − ±330 mV Static Characteristics (Cont’d) ACC Balance APC Balance S4 = B, S6 = B S4 = B, S6 = B Oscillator Balance Hue Linearity, 30% R2 = 470Ω, R3 = 201Ω, Note 1 0.22 − 0.47 Hue Linearity, 70% R2 = 201Ω, R3 = 470Ω, Note 1 0.59 − 0.74 Hue Switching Voltage R2 = 1813Ω, R3 = 201Ω, V1 = 0 − − 350 mV R2 = 470Ω, R3 = 4230Ω, V1 = V10 − − 300 mV Dynamic Characteristics (ein = 0.4Vpp, fin = 3,579,545HZ, fo preset to 3,579,545 ±5HZ by adj. R13, S1 = A, S12 = B, S13 = A unless otherwise specified) − − ±400 ein = 0, read VB/V10 0.08 − 0.92 Oscillator Adjust Range, Positive ein = 0, S13 = B +500 − − Hz Oscillator Adjust Range, Negative ein = 0, S13 = C −500 − − Hz Pull−In, High fin = 3,579,745Hz Note 2 Pull−In, Low fin = 3,579,345Hz Note 2 Oscillator Frequency Deviation ein = 0, S12 = A APC Balance Tint Control, High Hz +350 − − mV Tint Control, Low S1 = B −350 − − mV ACC Balance ein = 0 − − ±50 mV ACC Control Note 3 120 − 250 mV APC Detector Overload ein = 10VPP − − ±100 mV Oscillator Drift ein = 0, t = 15 minutes − − ±100 mV Oscillator Temperature Coefficient TA = +50°C, t = 15 minutes − − ±4 Hz/°C Note 1. Adjust V1 for V2−3 = 0, read V1/V10. Note 2. Oscillator must lock on frequency. Note 3. ACC Control is defined as V15−15 with normal input voltage and frequency minus V15−16 with ein = 0 (ACC Balance reading). Pin Connection Diagram Hue Control 1 16 ACC Output Oscillator Output 2 15 ACC Output Oscillator Output 3 14 ACC Adjust Horizontal Key Pulse Input 4 13 APC Adjust GND 5 12 APC Output Oscillator Input 6 11 Oscillator Feedback Loop 7 10 Shunt Regulator and Bias Oscillator Feedback Loop 8 9 16 APC Output N.C. 9 .260 (6.6) Max 1 8 .785 (19.9) Max .300 (7.62) .200 (5.08) Max .245 (6.22) Min .100 (2.54) .700 (17.7)