NTE1827 Integrated Circuit VIF & SIF Circuit for TV/VCR Description: The NTE1827 is an IC containing the VIF section and SIF section on a single chip in the 20–Lead DIP package. The use of the small–sized package serves to make VCR tuner units smaller. Functions: D VIF section: VIF AMP, Video Det, Peak IF AGC, B/W Noise Canceller, RF AGC, AFT, Video Mute. D SIF section: SIF Limiter Amp, FM Det, SND Mute. Features: D High–Gain VIF Amp Requiring No Preamp D Non–Adjusting can be Attained by using a Ceramic Discriminator because of FM Detection being Quadrature Detection. D Possible to Mute Video, Sound for VCR. D Small–Sized Package. D Minimum Number of External Parts Required. D Operates from 9V Supply Voltage Operating Characteristics: (TA = +25°C, VCC = 12V, fp = 58.75MHz, fs = 54.25MHz (VIF)) Parameter Min Typ Max Unit I17 44 55 73 mA Maximum RF AGC Voltage VIOH 8.5 9.0 9.5 V Minimum RF AGC Voltage VIOL – – 0.5 V Quiescent Video Output Voltage V11 4.5 6.5 7.0 V fm = 400Hz 40%AM, Vo = 0.8Vp–p 30 36 42 dBu GR fm = 15kHz 78%AM, Vo = ±1dB 60 68 – dB Maximum Allowable Input Vimax fm =15kHz 78%AM, VO = ±1dB 100 – – mVrms Video Output Amplitude Vo(16) Vi = 10mVrms, fm = 15kHz 78%AM 1.9 2.2 2.5 Vpp Total Circuit Current Input Sensitivity AGC Range Symbol Vi Test Conditions Output S/N S/N Vi = 10mVrms CW 47 55 – dB Carrier Leakage CL Vi = 100mVrms, fm = 15kHz 78% AM 50 57 – dB Maximum AFT Voltage VIIH Vi = 10mVrms SWEEP 11 11.5 – V Operating Characteristics (Cont’d): (TA = +25°C, VCC = 12V, fp = 58.75MHz, fs = 54.25MHz (VIF)) Parameter Symbol Test Conditions Min Typ Max Unit Minimum AFT Voltage VIIL Vi = 10mVrms SWEEP – 0.4 1.0 V AFT Detection Sensitivity SF Vi = 10mVrms SWEEP 50 88 – mV/kHz White Noise Threshold Level VWTH Vi = 10mVrms SWEEP 6.4 6.8 7.2 V White Noise Clamp Level VWCL Vi = 10mVrms SWEEP 4.2 4.6 5.0 V Black Noise Threshold Level VBTH Vi = 10mVrms SWEEP 1.9 2.2 2.5 V Black Noise Clamp Level VBCL Vi = 10mVrms SWEEP 3.8 4.2 4.6 V SIF Output Signal Voltage VOS(16) P/S = 20dB 70 130 210 mVrms Frequency Characteristic fc –3dB 5 7 – MHz Differential Gain DG Vi =10mVrsm 87.5% VIDEOMOD – – 4 % Differential Phase DP Vi = 10mVrms 87.5% VIDEOMOD – – 3 deg Input Resistance ri – 1.5 – kohm Input Capacitance ci – 3.5 – pF – 200 400 µVrms 450 650 850 mVrms Vi = 100mVrms, fm = 400Hz, ∆f = ±25kHz – 0.5 1.0 % Vi = 100mVrms, fm = 400Hz, ∆f = ± 25kHz, 30%AM 50 60 – dB SIF Limiting Voltage Vilim –3dB Detection Output Voltage VO(3) Vi = 100mVrms, fm = 400Hz, ∆f = ±25kHz Total Harmonic Distortion AM Rejection THD(3) AMR Pin Connection Diagram FM Coil or Ceramic Discriminator 1 FM Coil or Ceramic Discriminator 2 Audio Output 3 IF AGC Filter 4 Bypass 5 20 Bypass 19 SIF Input 18 GND 11 1 10 .280 (7.12) Max 17 VCC 16 Video Output VIF Input 6 15 AFT Coil VIF Input 7 14 LLD Coil Bypass 8 13 LLD Coil RF AGC VR 9 12 AFT Coil RF AGC Output 10 20 11 AFT Output .995 (25.3) Max .300 (7.62) .280 (7.1) .100 (2.54) .125 (3.17) Min .385 (9.8)