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| ICs for FM/AM Tuner AN7293NFBQ FM-IF, NC, MPX IC for Car Radio s Overview The AN7293NFBQ is an IC having FM-IF, NC and MPX function for car radio. A tuner block of car radio can be constructed by this IC and the AN7289NFBQ/NSC. 24 17 25 16 Unit: mm 0.3+0.10 -0.05 7.00.3 0.6250.100 s Features * A less number of external components is required (8 components reduction compared with our conventional IC) * Neighbering-station interference characteristics improvement by band-ATC function * Band-mute on/off function * DIL package product (the AN7293NSC) is also available 32 9 0.8 0.15+0.10 -0.05 0.6250.100 (0.55) 1 8 0.10.1 7.00.3 s Applications * Car radios 9.20.4 SSOP032-P-0375 s Block Diagram ST-Ind. Mono: high 18 Stereo: low Mute-Adj. 21 AFC 22 V CC 24 23 20 SD-Adj. 19 GND VREF 25 26 27 IF det. VREF Mute PNL Noise det. Band-det. SD IF-counter 17 16 15 14 13 12 Level det. Multipath det. VCO PLL Demod. Pilot det. 11 10 9 VBAND IF-In 28 29 VS Out 30 31 32 IF limiter 1 2 3 4 5 6 7 Forced mono R-Out ATC-Adj. SEP-Adj. L-Out 8 1.40.2 9.20.4 1 AN7293NFBQ s Pin Description Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Description ASC adjustment/forced monaural ATC adjustment Separation adjustment ATC low-pass filter R-ch. output L-ch. output Mute voltage Pilot detection low-pass filter PLL low-pass filter PLL low-pass filter VCO Pilot cancel control low-pass filter Band signal output/band mute SW PNL low-pass filter PNL AGC PNL input Pin No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 ICs for FM/AM Tuner Description 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 Control voltage adjustment Control voltage Multi-path noise input Multi-path detection s Absolute Maximum Ratings Parameter Supply voltage Supply current Power dissipation *2 *1 Symbol VCC ICC PD Topr Tstg Rating 9.1 45 343.3 -30 to +80 -55 to +125 Unit V mA mW C C Operating ambient temperature Storage temperature *1 Note) *1: Except for the power dissipation, operating ambient temperature, and storage temperature, all ratings are for Ta = 25C. *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% AN7293NFBQ 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 light up level Separation L-channel Separation R-channel Capture range Counter output level (1) Counter output level (2) Monaural THD (L) Monaural THD (R) Stereo THD (L) Stereo THD (R) PNL-AGC voltage (1) PNL-AGC voltage (2) Residual noise voltage Symbol VC1 VC2 VC3 VC4 VC5 VC6 VOL VOR CB VPC Conditions Without signal input, pin 30 DC voltage VIN1 = 40 dB, pin 30 DC voltage VIN1 = 70 dB, pin 30 DC voltage VIN1 = 100 dB, pin 30 DC voltage VC5 = VC3 - VC2 VC6 = VC4 - VC3 VIN1 = 70 dB, pin 6 AC voltage VIN1 = 70 dB, pin 5 AC voltage CB = 20*log (VOL/VOR) VP = 10% modulation, VIN1 = 70 dB, pin 18 output voltage Min 0.0 0.6 2.4 4.5 1.8 1.85 85 85 -1.0 1.3 25 25 0.4 135 0 1.2 0.1 0.0 Typ 0.3 1.3 3.1 5.3 2.0 2.05 105 105 0 4 4.0 33 33 0.7 155 2 0.1 0.1 0.1 0.1 1.4 0.35 0.2 Max 0.9 1.6 3.8 5.8 2.2 2.25 125 125 1.0 14 6.3 175 5 0.3 0.3 0.3 0.3 1.7 0.60 0.7 Unit V V V V V V mV[rms] mV[rms] dB mV[rms] % dB dB % mV[rms] mV[rms] % % % % V V mV[rms] LAMPON 19 kHz modulation, Modulation factor at which pin 19 becomes under 1 V SepL SepR CR VIF1 VIF2 THDL THDR THDSTL THDSTR VAGC1 VAGC2 VNR L+R = 90%, VP = 10% Larger separation value after changing over pin 3 external resistor Modulation at VP = 6.5% Referred to 19 kHz VIN1 = 100 dB, V20 = 2 V pin 19 output voltage VIN1 = 100 dB, V20 = 5 V pin 19 output voltage 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 15 DC voltage VIN2 = 100 mV, f = 100 kHz input Difference from VAGC1 VIN2 = (pulse width 10 s, 1 V[p-p] 1 kHz) L-ch. output 3 AN7293NFBQ s Electrical Characteristics at Ta = 25C (continued) 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 V20 = 2 V, V19 > 2 V VIN bandwidth when V24 = 2 V, and V19 > 2 V, VIN1 = 100 dB Without input VIN1 input level when pin 5 AC voltage drops by 3 dB L-ch. output ratio when V2 = 2 V and 0 V VIN2 = (pulse width 1 s, 0.3 V[p-p] 1 kHz) pin 18 output pulse width Min 70 100 30 24 7 16 Typ 80 130 37 32 11 23 Max 90 160 44 38 15 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 19 becomes 2 V or more and LAMPON VAFC Without signal input, DC potential difference between pin 21 and pin 26. AFC offset voltage - 0.1 0.0 0.1 V 4 ICs for FM/AM Tuner s Application circuit Example ST-Ind. Mono: high Stereo: low AN7293NFBQ AFC 0.01 F SD-Adj. IF-Counter SD 470 pF VCC 100 F 50 k 100 k 0.1F 10 k Mute-Adj. 100 k Seek/Lamp ST-Lamp: high (4.5 V or more) Seek: Open VCC 2.2 k 18 0.01 F 180 pF 680 pF 0.1 F 0.1 F 16 24 23 22 21 20 19 GND 25 VREF 0.1 F 27 IF-In Ms 3 Ms 3 0.022 F 28 IF limiter Band-det. SD IF-counter 26 IF det. VREF Mute PNL Noise det. 17 330 k 15 14 13 12 1 F 912kHz 0.47 F 0.047 F VBAND VS Out 50 k 29 VS-Adj. 0.01 F 30 330 k 100 k Level det. Multipath det. VCO PLL Demod. Pilot det. 11 31 32 10 0.1 F 9 10 k 0.1 F 1000pF 0.1 F 1 2 0.1 F 3 10 k 4 5 6 7 0.1 F 8 0.1 F 0.022 F 0.01 F 50 k ASC-Adj. ATC-Adj. Forced mono SEP-Adj. R-Out L-Out 0.022 F 50 k 5 |
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