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NTE712 Integrated Circuit TV/FM Sound IF Detector
Description: The NTE712 is a versitile device in a 14-Lead DIP type package incorporating IF limiting, detection, electronic attenuation, audio amplifier, and audio driver capabilities. Features: D Differential Peak Detector Requiring a Single Tuned Circuit D Electronic Attenuator Replaces Conventional AC Volume Control: Range > 60dB D Excellent AM Rejection @ 4.5 and 5.5MHz D High Stability D Low Harmonic Distortion D Audio Drive Capability: 6.0mAP-P D Minimum Undesirable Output Signal @ Maximum Attenuation Absolute Maximum Ratings: (TA = +25C unless otherwise specified) Input Signal Voltage (Pin1 and Pin2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3V Power Supply Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625mW Derate Above 25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mW/C Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +75C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Electrical Characteristics: (V+ = 24V, TA = +25C unless otherwise specified)
Parameter Regulated Voltage DC Supply Current Quiescent Output Voltage Pin 5 5 12 V+ = 9V, RS = 0 Test Conditions Min 10.3 10 5.1 Typ 11.0 16 - Max 12.2 24 - Unit V mA V
Dynamic Characteristics: (V+ = 24V, TA = +25C unless otherwise specified)
Parameter Test Conditions Min Typ Max Unit IF Amplifier and Detector (fo = 4.5MHz, f = 25kHz) AM Rejection Input Limiting Threshold Voltage Recovered Audio Output Voltage Output Distortion Vin = 10mVrms Vin = 10mVrms Vin = 10mVrms, Note 1 40 - 0.5 - 51 200 0.7 0.4 - 400 - 2.0 dB Vrms Vrms %
Note 1. 100% FM, 30% AM Modulation.
Dynamic Characteristics (Cont'd): (V+ = 24V, TA = +25C unless otherwise specified)
Parameter Test Conditions Min Typ Max Unit IF Amplifier and Detector (fo = 5.5MHz, f = 50kHz) AM Rejection Input Limiting Threshold Voltage Recovered Audio Output Voltage Output Distortion Input Impedance Components Parallel Input Resistance Parallel Input Capacitance Output Impedance Components Parallel Output Resistance Parallel Output Capacitance Output Resistance Pin7 Pin8 Attenuator Volume Reduction Range Maximum Undesirable Signal Audio Amplifier Voltage Gain Total Harmonic Distortion Output Voltage Input Resistance Output Resistance Vin = 0.1Vrms, f = 400Hz VO = 2Vrms, f = 400Hz THD = 5%, f = 400Hz f = 400Hz f = 400Hz 17.5 - 2.0 - - 20.0 2.0 3.0 70 270 - - - - - dB % Vrms k DC Volume Control = DC Volume Control = , Note 2 60 - - 0.07 - 1.0 dB mV f = 4.5MHz, measurement between Pin9 and GND - - - - 3.25 3.6 7.5 250 - - - - k pF k Vin = 10mVrms Vin = 10mVrms f = 4.5MHz, measurement between Pin1 and Pin2 - - 17 4 - - k pF Vin = 10mVrms, Note 1 40 - 0.5 - 53 200 0.91 0.9 - 400 - - dB Vrms Vrms %
Note 1. 100% FM, 30% AM Modulation. Note 2. Undesirable signal is measured at Pin8 when volume control is set for minimum output.
Pin Connection Diagram
IF In Bias IF In GND GND V+ DC Volume Control De-Emphasis
1 2 3 4 5 6 7
14 Audio Input 13 Tone Control 12 Audio Output 11 N.C. 10 Quad Detector 9 8 Quad Detector Detector Output
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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