AN7289

ICs for FM/AM Tuner AN7289NSC FM-FE+AM IC for car radio s Overview The AN7289NSC is an IC having FM-FE+AM functions for car radio. A tuner block of car radio can be constructed by combination of this IC and the AN7293NSC / NFBQ. 17.81±0.3 32 17 Unit: mm s Features • A less number of electrolytic capacitors is required (3 capacitors reduction compared with our conventional IC) • AM: Practical sensitivity is improved by 2 dB by ATC • AM: Strong input characteristics is improved by 2-loop AGC function 1 16 7.2±0.3 9.3±0.3 1.23 1.0 Seating plane s Applications • Car radios SSOP032-P-0375 s Block Diagram GND2 32 31 30 29 28 27 26 25 24 23 22 21 20 19 0.1±0.1 0.9 0.35±0.1 18 15 2.0±0.2 0.15 FE OSC AM OSC FM AGC FM/AM SW FM mix. AM RF-AGC AM mix. AM.S-meter FM IF-amp. AM ATC 1 2 3 AM IF-AGC 4 5 AM det. 6 7 AM SSC 10 8 9 AM IF-amp. 11 12 13 14 16 1 GND1 VCC 17 0.3 AN7289NSC s Pin Description Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Description FM-keyed-AGC input AM-AF output / LO setting AM-ATC input AM-IF level detection AM detection output VCC1 AM-IF counter output / DX / LO SW AM-SD output AM-signal meter output FM-IF output AM-IF output GND1 SSC AM-RF level detection AM-WAGC detection / DX setting AM-IF input AM-mix. output 31 32 Pin No. 18 19 20 21 22 23 24 25 26 27 28 29 30 ICs for FM/AM Tuner Description FM-IF input AM-RF gain control AM-mix. input FM-PIN-diode driver AM-OSC coil pin FM-mix. output (2) FM-mix. output (1) FM-PIN-diode driver FM-mix. input VCC2 / FM / AM SW FM-AGC output FM-OSC buffer output AM-OSC buffer output / FE-AGC sensitivity setting GND2 FM-OSC coil pin s Absolute Maximum Ratings Parameter Supply voltage Supply current Power dissipation *2 *1 Symbol VCC ICC PD Topr Tstg *1 Rating 9.1 56 380.2 −35 to +80 −55 to +125 Unit V mA mW °C °C Operating ambient temperature Storage temperature Note) *1 : Except for the power dissipation, operating ambient temperature, and storage temperature, all ratings are for Ta = 25°C. *2: Ta = 80°C s Recommended Operating Range Parameter Supply voltage Symbol VCC Range 7.2 to 9.0 Unit V 2 ICs for FM/AM Tuner s Electrical Characteristics at Ta = 25°C 1. AM mode VCC = 8.0 V, fIN = 1 MHz AM tuning condition: OSC output frequency = 1 450 kHz ±500 Hz AN7289NSC Parameter AM consumption current AM-AF output AM signal-to-noise ratio AM-AGC width AM-ATC operation Symbol amIt1 amVO amSN amW amATC Conditions Without input AM-AF output at VIN2 = 74 dBµ, 400 Hz 30% AM-AF output S/N at VIN2 = 74 dBµ, 400 Hz 30% AM-AF output when input changes −10 dB at VIN2 = 74 dBµ, 400 Hz 30% (Output ratio [dB] of 400 Hz and 3 kHz when VIN2 = 18 dBµ) − (Output ratio [dB] of 400 Hz and 3 kHz when VIN2 = 74 dBµ) 80% Mod., AM-AF Out output VIN2 = 74 dBµ 400 Hz 80% AM-AF output distortion VIN2 = 130 dBµ 400 Hz 80% AM-AF output distortion fIN2 = 1.4 MHz Input when pin 15 voltage becomes below 3 V Without input VIN2 = 40 dBµ Without input VIN2 = 40 dBµ Without input Without input, pin 9 voltage Pin 9 voltage at VIN2 = 30 dBµ Pin 9 voltage at VIN2 = 130 dBµ AM-IF count output is 120 mV or over VIN2 when f becomes 450 kHz ±2 kHz AM-IF count output is 120 mV or over VIN2 when f becomes 450 kHz ±2 kHz Min 28 100 48 55 3.5 Typ 36 125 52 59 6.5 Max 44 155 58 63 9.5 Unit mA mA dB dB dB AM-distortion 1 AM-distortion 2 AM wide band AGC on input AM local oscillation buffer output AM-IF count output 1 AM-IF count output 2 AM-SD output 1 AM-SD output 2 AM signal meter output 1 AM signal meter output 2 AM signal meter output 3 AM search sensitivity DX AM search sensitivity LO amT1 amT2 amVW amVOS amIF1 amIF2 amSD1 amSD2 amVS1 amVS2 amVS3 amDX amLO 0.01 0.01 97 160 150  4.5 0.0 1 0.7 4.1 24 44 0.5 0.5 103 210 210  4.9 0.2 50 0.95 4.8 30 50 1.5 1.5 109 260 270 10 5.1 0.5 200 1.2 5.1 36 56 % % dBµ mV mV mV V V mV V V dBµ dBµ 3 AN7289NSC s Electrical Characteristics at Ta = 25°C (continued) 2. FM mode VCC = 8.0 V, fIN1 = 98 MHz FM tuning condition: OSC output frequency = 108.7 MHz ±10 kHz ICs for FM/AM Tuner Parameter FM local oscillation buffer output FM-IF output level FM-AGC sensitivity FM-AGC voltage (high) FM-AGC voltage (low) FM consumption current Symbol fmVOS fmIF fmAGC fmVaH fmVaL fmIt Conditions fOSC = 108.7 MHz without input VIN1 = 71 dBµ VIN1 level when V28 becomes 3 V VIN1 = 70 dBµ V28 VIN1 = 82 dBµ V28 Without input Min 140 50 59 6.0  26 Typ 200 95 63 6.4 0.05 35 Max 260 140 67 6.8 0.5 44 Unit mV mV dBµ V V mA s Application Circuit Example AM-VT FM-MIX In VfOSC VaOSC FE-VT 32 31 30 29 28 27 26 25 FM-Pin D FM-AGC 24 23 22 21 AM-ANT 20 19 18 15 FE OSC AM OSC FM AGC FM/AM SW FM mix. AM RF-AGC AM mix. AM.S-meter FM IF-amp. AM ATC AM IF-AGC AM det. AM SSC AM IF-amp. 10 11 12 13 14 KEYED-AGC In 16 1 2 3 4 5 6 7 8 9 17 VCC AM-IF Count AM-SD Out AM-S.Meter AM-AF Out 4 FM-IF Out 5V