NTE1527 Integrated Circuit FM, IF Amp/AFC & Meter Driver Function: D FM Section: IF Amp., Det., Driver for Tuning Meter D AM Section: Conv., IF Amp Features: FM D Incorporates a Full−Balance Differential Circuit to Obtain Stable, High Gain in the IF Amplifying Stage D Incorporates a Low−Distortion, Quadrature Detection Circuit (0.3% distortion at 100% modulation). D The Tuning Meter’s Driver Voltage is Logarithmic to Input AM D A High−Gain IF Amplifying Stage, with Input Level Allowable up to 100dBµ. D The Frequency Converting Stage Consists of a Single Transistor, while the Base, Emitter, and Collector are Provided with Pins to Ensure Handling Ease. Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage (Note 1), VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V Power Dissipation, PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 420mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +125°C Note 1. Standard Operating Voltage = 5.5V Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter FM Limiting Sensitivity Recovered AF Voltage Symbol Vin(lim) VO Total Harmonic Distortion THD Signal−to−Noise Ratio S/N AM Rejection Ratio AMR Test Conditions Min Typ Max Unit −3dB point − 30 − dBµ 106dBµ, µ 10.7MHz Mod. = 400Hz and 100% − 430 − mV − 0.3 − % − 76 − dB − 55 − dB FM = 100%, 400Hz, FM 106dBµ, AM = 30%, 1kHz mod. Electrical Characteristics (Cont’d): (TA = +25°C unless otherwise specified) Parameter Signal Meter Output Detector Output Voltage Symbol VM VO−VR Test Conditions Min Typ Max Unit 106dBµ − 1.6 − V 106dBµ, at ±100kHz detuning − 310 − mV − −90 − mV ∆(VO−VR) (VO−VR) at 0dBµ DC Offset AM IF Sensitivity SIF Input Level at Output = 10mV (Mod. = 400Hz and 30%) − 32 − dBµ Recovered AF Voltage VO Input = 74dBµ − 120 − mV Mod. = 400Hz and 30% − 0.3 − % − 60 − dB − 55 − dB − 45 − dB/m Total Harmonic Distortion THD Signal−to−Noise Ratio S/N AGC Figure of Merit AGC Usually Sensitivity SIF Between 100dBµ and itit’ss −10dB 10dB Input Level at S/N = 20dB Note 2. FM Input Level; voltage level when SG output is terminated with SG’s Rg. Note 3. AM Input Level; voltage level when SG output is open. Pin Connection Diagram 1.007 (25.5) Max .964 (24.4) 1st AM IF Input 17 FM IF Input 1 18 16 AM Converter Output 17 Bypass 2 15 AM OSC 8 1 Bypass 3 14 AM Converter Input 9 16 Decoupling 4 GND 5 FM Output 6 Detector 7 Phase Compensation 8 GND 18 13 Bypass .291 (7.4) Max .248 (6.3) 12 2nd AM IF Output .252 (6.4) .200 (5.08) 11 AGC Bias 10 VCC 9 Signal Meter Output .188 (4.77) .020 (.508) .051 (1.29) .100 (2.54) Typ 15° .009 (0.22)