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 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 = +25C, VCC = 12V, fp = 58.75MHz, fs = 54.25MHz (VIF))
Parameter Total Circuit Current Maximum RF AGC Voltage Minimum RF AGC Voltage Quiescent Video Output Voltage Input Sensitivity AGC Range Maximum Allowable Input Video Output Amplitude Output S/N Carrier Leakage Maximum AFT Voltage Symbol I17 VIOH VIOL V11 Vi GR Vimax Vo(16) S/N CL VIIH fm = 400Hz 40%AM, Vo = 0.8Vp-p fm = 15kHz 78%AM, Vo = 1dB fm =15kHz 78%AM, VO = 1dB Vi = 10mVrms, fm = 15kHz 78%AM Vi = 10mVrms CW Vi = 100mVrms, fm = 15kHz 78% AM Vi = 10mVrms SWEEP Test Conditions Min 44 8.5 - 4.5 30 60 100 1.9 47 50 11 Typ 55 9.0 - 6.5 36 68 - 2.2 55 57 11.5 Max 73 9.5 0.5 7.0 42 - - 2.5 - - - Unit mA V V V dBu dB mVrms Vpp dB dB V
Operating Characteristics (Cont'd): (TA = +25C, VCC = 12V, fp = 58.75MHz, fs = 54.25MHz (VIF))
Parameter Minimum AFT Voltage AFT Detection Sensitivity White Noise Threshold Level White Noise Clamp Level Black Noise Threshold Level Black Noise Clamp Level SIF Output Signal Voltage Frequency Characteristic Differential Gain Differential Phase Input Resistance Input Capacitance SIF Limiting Voltage Detection Output Voltage Total Harmonic Distortion AM Rejection Symbol VIIL SF VWTH VWCL VBTH VBCL VOS(16) fc DG DP ri ci Vilim VO(3) THD(3) AMR -3dB Vi = 100mVrms, fm = 400Hz, f = 25kHz Vi = 100mVrms, fm = 400Hz, f = 25kHz Vi = 100mVrms, fm = 400Hz, f = 25kHz, 30%AM Test Conditions Vi = 10mVrms SWEEP Vi = 10mVrms SWEEP Vi = 10mVrms SWEEP Vi = 10mVrms SWEEP Vi = 10mVrms SWEEP Vi = 10mVrms SWEEP P/S = 20dB -3dB Vi =10mVrsm 87.5% VIDEOMOD Vi = 10mVrms 87.5% VIDEOMOD Min - 50 6.4 4.2 1.9 3.8 70 5 - - - - - 450 - 50 Typ 0.4 88 6.8 4.6 2.2 4.2 130 7 - - 1.5 3.5 200 650 0.5 60 Max 1.0 - 7.2 5.0 2.5 4.6 210 - 4 3 - - 400 850 1.0 - Unit V mV/kHz V V V V mVrms MHz % deg kohm pF Vrms mVrms % dB
Pin Connection Diagram
FM Coil or Ceramic Discriminator 1 FM Coil or Ceramic Discriminator 2 Audio Output 3 IF AGC Filter 4 Bypass 5 VIF Input 6 VIF Input 7 Bypass 8 RF AGC VR 9 RF AGC Output 10
20 Bypass 19 SIF Input 18 GND 17 VCC 16 Video Output 15 AFT Coil 14 LLD Coil 13 LLD Coil 12 AFT Coil 11 AFT Output
.100 (2.54) .125 (3.17) Min .385 (9.8) .995 (25.3) Max .280 (7.1) .300 (7.62) 20 1 11 10 .280 (7.12) Max


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