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| ICs for FM/AM Tuner AN7293NSC FM-IF, NC, MPX IC for car radio s Overview The AN7293NSC is an IC having FM-IF, NC and MPX functions for car radio. A tuner block of car radio can be constructed in combination with the AN7289NFBQ/ NSC. Small outline package product (the AN7293NFBQ) is also available. Unit: mm 17.810.3 32 17 * A less number of external components is required (8 components reduction compared with our conventional IC) * Neighbouring-station interference characteristics improvement by band-ATC function * Band-mute on/off function 1 16 1.23 0.350.1 1.0 Seating plane s Applications * Car radios SSOP032-P-0375 s Block Diagram IF-Count./ST-Ind./SD 0.10.1 0.9 GND IF In 32 31 30 29 28 27 26 25 AFC VCC 24 23 22 21 20 19 18 VREF IF limiter IF det. Mute SD, IF counter Band Mute PNL Noise det. Level det. Multipath det. Demod. Pilot det. VCO PLL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 S-Meter Adj. Forced Mono Sep. Adj. R-Out ATC Adj. S-Meter L-Out 16 17 VBAND 2.00.2 0.15 0.3 s Features 7.20.3 9.30.3 1 AN7293NSC s Pin Description Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Description Control voltage adjustment Control voltage Multiple-path noise input Multiple-path detection ASC adjustment/forced monaural ATC adjustment Separation adjustment ATC low-pass filter R-channel output L-channel output Mute voltage Pilot detection low-pass filter PLL low-pass filter PLL low-pass filter VCO Pilot cancel control low-pass filter Pin No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 ICs for FM/AM Tuner Description Band signal output/band mute SW PNL low-pass filter PNL AGC PNL input Detection output PNL output hold SD/FM-IF counter output/stereo indicator SD sensitivity adjustment AFC voltage VCC FM detection Soft mute adjustment GND VREF IF bypass IF input s Absolute Maximum Ratings Parameter Supply voltage Supply current Power dissipation *2 *1 Symbol VCC ICC PD Topr Tstg Rating 9.1 45 380.2 -30 to +80 -55 to +125 Unit V mA mW C C Operating ambient temperature Storage temperature *1 Note) *1: Ta = 25C except power dissipation, operating ambient temperature and storage temperature. *2: Ta = 80C 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 = 25C Unless otherwise specified, VCC = 8V, VIN1 is f = 10.70 MHz, Mod. = 1 kHz, 30% FM modulation stereo input is L + R = 90% VP = 10% AN7293NSC Parameter Control voltage (1) Control voltage (2) Control voltage (3) Control voltage (4) Control voltage (5) Control voltage (6) Output level L-channel Output level R-channel Channel balance Residual pilot voltage Stereo lamp turn-on level Separation L-channel Separation R-channel Capture range Counter output level (1) Counter output level (2) Symbol VC1 VC2 VC3 VC4 VC5 VC6 VOL VOR CB VPC Conditions Without signal input, pin 2 DC voltage VIN1 = 40 dB, pin 2 DC voltage VIN1 = 70 dB, pin 2 DC voltage VIN1 = 100 dB, pin 2 DC voltage VC5 = VC3 - VC2 VC6 = VC4 - VC3 VIN1 = 70 dB, pin 10 AC voltage VIN1 = 70 dB, pin 9 AC voltage CB = 20*log (VOL/VOR) VP = 10% modulation, VIN1 = 70 dB, pin 22 output voltage Min 0.0 0.7 2.5 4.5 1.8 1.9 85 85 -1.0 1.3 25 25 0.4 120 0 Typ 0.3 1.2 3.2 5.3 2.0 2.1 105 105 0 4 4.0 33 33 0.7 140 2 Max 0.9 1.7 3.9 5.8 2.2 2.3 125 125 1.0 14 6.3 160 5 Unit V V V V V V mV[rms] mV[rms] dB mV[rms] % dB dB % mV[rms] mV[rms] LAMPON 19 kHz modulation, Modulation factor at which pin 23 becomes under 1 V SepL SepR CR VIF1 VIF2 L+R = 90%, VP = 10% Larger separation value after changing over pin 7 external resistor Modulation at VP = 6.5% Referred to 19 kHz VIN1 = 100 dB, V24 = 2 V pin 23 output voltage VIN1 = 100 dB, V24 = 5 V pin 23 output voltage Monaural THD (L) Monaural THD (R) Stereo THD (L) Stereo THD (R) PNL-AGC voltage (1) PNL-AGC voltage (2) Residual noise voltage THDL THDR THDSTL THDSTR VAGC1 VAGC2 VNR VIN2 monaural input, 500 mV[0-p] 1 kHz, L-ch. output distortion factor VIN2 monaural input, 500 mV[0-p] 1 kHz, R-ch. output distortion factor VIN2 stereo input, 500 mV[0-p] 1 kHz, L-ch. output distortion factor VIN2 stereo input, 500 mV[0-p] 1 kHz, R-ch. output distortion factor VIN2 = Without input pin 19 DC voltage Input VIN2 = 100 mV, f = 100 kHz Difference from VAGC1 VIN2 = (pulse width 10 s, 1 V[p-p] 1 kHz), L-ch. output 1.2 0.1 0.0 0.1 0.1 0.1 0.1 1.4 0.35 0.2 0.3 0.3 0.3 0.3 1.7 0.60 0.7 % % % % V V mV[rms] 3 AN7293NSC s Electrical Characteristics at Ta = 25C Unless otherwise specified, VCC = 8V, VIN1 is f = 10.70 MHz, Mod. = 1 kHz, 30% FM modulation stereo input is L + R = 90% VP = 10% ICs for FM/AM Tuner Parameter SD sensitivity SD bandwidth Supply current Limiting sensitivity ATC Gate pulse width Symbol SDS SDW ITOT VLIM VATC PW Conditions VIN1 when V24 = 2 V, V23 > 2 V VIN bandwidth when V24 = 2 V, and V23 > 2 V, VIN1 = 100 dB Without input VIN1 input level when pin 9 AC voltage drops by 3 dB L-ch. output ratio when V6 = 2 V and 0 V VIN2 = (pulse width 1 s, 0.3 V[p-p] 1 kHz) pin 22 output pulse width Min 68 100 30 24 6 16 Typ 78 130 37 32 10 23 Max 88 160 44 38 14 30 Unit dB kHz mA dB dB s * Design reference data Note) The following characteristics are the reference values for design and not guaranteed values. Parameter Stereo lamp turn-off level Symbol Conditions Min 2.0 Typ 6.0 Max 10.0 Unit dB LAMPOFF Ratio between the modulation factor when pin 23 becomes 2 V or higher and LAMPON VAFC Without signal input, DC potential difference between pin 25 and pin 30 AFC offset voltage - 0.1 0.0 0.1 V 4 ICs for FM/AM Tuner s Application circuit Example AN7293NSC IF-Counter ST-Indicator SD 100 F 470 pF 0.1 F 0.01 F 51 k VBAND VCC 17 VCO PLL Noise det. 16 15 14 1F 0.047 F 18 0.47 F CERALOCK (912 k) 0.1 F 19 20 330 k 0.1 F 0.1 F 13 10 k PNL Pilot det. 21 680 pF 12 11 0.1 F 0.1 F L-Out 0.022 F 0.022 F 22 SD, IF counter Band Mute 0.01 F 23 100 k 10 Demod. 24 5.6 k 1F 180 pF(pH) 2.2 k 9 8 Mute 25 26 27 28 R-Out 0.01 F 7 10 k IF det. Sep. Adj. 0.1F 50 k 50 k ATC Adj. ASC Adj. Forced Mono 0.1F 6 5 Multipath det. 100 k GND 29 VREF 4 3 1000 pF 30 0.1 F 0.022 F 330 k 100 pF IF limiter Level det. 31 32 M53 2 100 k 1 50k S-Meter Adj. S-Meter VREF IF In AFC M53 5 |
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