NTE7235 Integrated Circuit AM Tuner & Stereo Decoder for Car Audio Description: The NTE7235 is an integrated circuit in a 16−Lead staggered SIP type package designed for use as an AM tuner and stereo decoder in car radio applications. Function: D RF Amplifier D Mixer D Local OSG D IF Amplifier D Detector D AGC Absolute Maximum Ratings: (TA = +255C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 675mW Derate Above 255C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4mW/5C Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −305 to +755C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −555 to +1505C Electrical Characteristics: Parameter (VCC = 9V, fS = 1Mhz, fM = 400Hz, Mode = 30%, IF = 455kHz, TA = +255C unless otherwise specified) Symbol Test Conditions Min Typ Max Unit Supply Current ICC Pin6 Open 9 13 20 mA Recovered Output Voltage VOD VN = 74dB V 65 90 115 mVrms Maximum Sensitivity MS VOD = 20mVrms − 9 − dB V Quieting Sensitivity QS S/N = 20dB − 24 30 dB V Signal−to−Noise Ratio S/N VN = 74dB V 46.0 52.5 − dB Total Harmonic Distortion THD VN = 74dB V − 0.3 3.0 % − 0.6 − % − 0.5 − % 2IF − −37 − dB 3IF − −50 − dB Mod = 80% VN = 120dB V Tweet Tweet VN = 74dB V, Max. Point Electrical Characteristics (Cont’d): (VCC = 9V, fS = 1Mhz, fM = 400Hz, Mode = 30%, IF = 455kHz, TA = +255C unless otherwise specified) Parameter Pin15 Input Impedance Parallel Input Resistance Symbol Rip15 Parallel Input Capacitance Cip15 Pin13 Output Impedance Parallel Output Resistance Rop13 Parallel Output Capacitance Pin11 Input Impedance Parallel Input Resistance Rip11 Cip11 Pin9 Output Impedance Parallel Output Resistance Rop9 Pin7 Input Impedance Parallel Input Resistance Parallel Input Capacitance IF Output Voltage Min Typ Max Unit − 6.6 − k5 − 3 − pF − 100 − k5 − 1.4 − pF − 1.1 − k5 − 7.5 − pF − 100 − k5 − 3.5 − pF − 3.5 − k5 − 8.0 − pF VN = 34dB V − 14 − mVrms VN = 74dB V − 76 − mVrms f − 1000kHz f − 1000kHz Cop13 Parallel Input Capacitance Parallel Output Capacitance Test Conditions f − 1000kHz f − 455kHz Cop9 Rip7 f − 455kHz Cip7 VIF Pin Connection Duagram (Front View) 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 RF Bypass RF Input Mix Bypass RF Output AGC Bypass Mix Input Local OSC Mix Output GND IF Input IF Output 1st IF Bypass VCC 2nd IF Bypass Recovered Output AGC Input .126 (3.2) .256 (6.5) Max .335 (8.5) Max .098 (2.5) Min .010 (0.25) .118 (3.0) .843 (21.4) .050 (1.27) 1 16 .020 (0.5) .100 (2.54)