ICs for FM/AM Tuner AN7293NFBQ FM-IF, NC, MPX IC for Car Radio ■ Overview Unit: mm 16 32 9 ■ Features 7.0±0.3 9.2±0.4 ■ Applications SSOP032-P-0375 • Car radios (0.55) 1.4±0.2 0.625±0.100 8 0.1±0.1 1 0.15+0.10 –0.05 0.625±0.100 0.8 • 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 9.2±0.4 25 0.3+0.10 –0.05 17 7.0±0.3 24 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. GND VREF 17 ST-Ind. Mono: high 18 Stereo: low 19 SD-Adj. 20 21 AFC 22 V CC 23 24 Mute-Adj. ■ Block Diagram 25 16 IF det. 26 PNL Mute VREF Noise det. 27 IF limiter IF-In 28 15 14 Band-det. SD IF-counter 13 29 VBAND 12 Level det. Multipath det. 10 Pilot det. Demod. 6 9 L-Out 5 R-Out 4 3 SEP-Adj. 2 ATC-Adj. Forced mono 1 32 8 31 11 VCO PLL 7 VS Out 30 1 AN7293NFBQ ICs for FM/AM Tuner ■ Pin Description Pin No. Description Pin No. Description 1 ASC adjustment/forced monaural 17 Detection output 2 ATC adjustment 18 PNL output hold 3 Separation adjustment 19 SD/FM-IF counter output/stereo indicator 4 ATC low-pass filter 20 SD sensitivity adjustment 5 R-ch. output 21 AFC voltage 6 L-ch. output 22 VCC 7 Mute voltage 23 FM detection 8 Pilot detection low-pass filter 24 Soft mute adjustment 9 PLL low-pass filter 25 GND 10 PLL low-pass filter 26 VREF 11 VCO 27 IF bypass 12 Pilot cancel control low-pass filter 28 IF input 13 Band signal output/band mute SW 29 Control voltage adjustment 14 PNL low-pass filter 30 Control voltage 15 PNL AGC 31 Multi-path noise input 16 PNL input 32 Multi-path detection ■ Absolute Maximum Ratings Parameter Symbol Rating Unit VCC 9.1 V ICC 45 mA PD 343.3 mW Topr −30 to +80 °C Tstg −55 to +125 °C Supply voltage Supply current Power dissipation *2 Operating ambient temperature Storage temperature *1 *1 Note) *1: Except for the power dissipation, operating ambient temperature, and storage temperature, all ratings are for Ta = 25°C. *2: Ta = 80°C ■ Recommended Operating Range Parameter Supply voltage 2 Symbol Range Unit VCC 7.2 to 9.0 V ICs for FM/AM Tuner AN7293NFBQ ■ Electrical Characteristics at Ta = 25°C 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% Parameter Symbol Conditions Min Typ Max Unit Control voltage (1) VC1 Without signal input, pin 30 DC voltage 0.0 0.3 0.9 V Control voltage (2) VC2 VIN1 = 40 dBµ, pin 30 DC voltage 0.6 1.3 1.6 V Control voltage (3) VC3 VIN1 = 70 dBµ, pin 30 DC voltage 2.4 3.1 3.8 V Control voltage (4) VC4 VIN1 = 100 dBµ, pin 30 DC voltage 4.5 5.3 5.8 V Control voltage (5) VC5 VC5 = VC3 − VC2 1.8 2.0 2.2 V Control voltage (6) VC6 VC6 = VC4 − VC3 1.85 2.05 2.25 V Output level L-channel VOL VIN1 = 70 dBµ, pin 6 AC voltage 85 105 125 mV[rms] Output level R-channel VOR VIN1 = 70 dBµ, pin 5 AC voltage 85 105 125 mV[rms] Channel balance CB CB = 20·log (VOL/VOR) −1.0 0 1.0 dB Residual pilot voltage VPC VP = 10% modulation, VIN1 = 70 dBµ, pin 18 output voltage 4 14 mV[rms] LAMPON 19 kHz modulation, Modulation factor at which pin 19 becomes under 1 V 1.3 4.0 6.3 % L+R = 90%, VP = 10% Larger separation value after changing over pin 3 external resistor 25 33 dB 25 33 dB Modulation at VP = 6.5% Referred to 19 kHz ±0.4 ±0.7 % Stereo lamp light up level Separation L-channel SepL Separation R-channel SepR Capture range CR Counter output level (1) VIF1 VIN1 = 100 dBµ, V20 = 2 V pin 19 output voltage 135 155 175 mV[rms] Counter output level (2) VIF2 VIN1 = 100 dBµ, V20 = 5 V pin 19 output voltage 0 2 5 mV[rms] Monaural THD (L) THDL VIN2 monaural input, 500 mV[0-p] 1 kHz, L-ch. output distortion factor 0.1 0.3 % Monaural THD (R) THDR VIN2 monaural input, 500 mV[0-p] 1 kHz, R-ch. output distortion factor 0.1 0.3 % Stereo THD (L) THDSTL VIN2 stereo input, 500 mV[0-p] 1 kHz, L-ch. output distortion factor 0.1 0.3 % Stereo THD (R) THDSTR VIN2 stereo input, 500 mV[0-p] 1 kHz, R-ch. output distortion factor 0.1 0.3 % PNL-AGC voltage (1) VAGC1 VIN2 = Without input pin 15 DC voltage 1.2 1.4 1.7 V PNL-AGC voltage (2) VAGC2 VIN2 = 100 mV, f = 100 kHz input Difference from VAGC1 0.1 0.35 0.60 V Residual noise voltage VNR VIN2 = (pulse width 10 µs, 1 V[p-p] 1 kHz) L-ch. output 0.0 0.2 0.7 mV[rms] 3 AN7293NFBQ ICs for FM/AM Tuner ■ Electrical Characteristics at Ta = 25°C (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% Parameter Symbol Conditions Min Typ Max Unit SD sensitivity SDS VIN1 when V20 = 2 V, V19 > 2 V 70 80 90 dBµ SD bandwidth SDW VIN bandwidth when V24 = 2 V, and V19 > 2 V, VIN1 = 100 dBµ 100 130 160 kHz Supply current ITOT Without input 30 37 44 mA Limiting sensitivity VLIM VIN1 input level when pin 5 AC voltage drops by 3 dB 24 32 38 dBµ ATC VATC L-ch. output ratio when V2 = 2 V and 0 V 7 11 15 dB VIN2 = (pulse width 1 µs, 0.3 V[p-p] 1 kHz) pin 18 output pulse width 16 23 30 µs Min Typ Max Unit 2.0 6.0 10.0 dB − 0.1 0.0 0.1 V Gate pulse width PW • Design reference data Note) The following characteristics are the reference values for design and not guaranteed values. Parameter Stereo lamp turn off level AFC offset voltage 4 Symbol Conditions 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. ICs for FM/AM Tuner AN7293NFBQ AFC ST-Ind. Mono: high Stereo: low ■ Application circuit Example IF-Counter SD 470 pF GND 25 VREF 26 VREF IF limiter 28 100 kΩ 0.01 µF 1000pF 15 Noise det. Band-det. SD IF-counter 50 kΩ 29 VS-Adj. 14 Level det. 31 Multipath det. 0.47 µF 0.047 µF 13 12 30 VCO PLL 11 VBAND 1 µF 912kHz 10 0.1 µF Pilot det. Demod. 32 0.1 µF 9 0.1 µF 0.1 µF 8 7 0.1 µF L-Out 0.022 µF 6 0.022 µF 5 R-Out 0.01 µF 0.1 µF 3 10 kΩ 4 SEP-Adj. 2 50 kΩ ATC-Adj. ASC-Adj. 50 kΩ 1 10 kΩ Forced mono 330 kΩ VS Out 0.022 µF 330 kΩ PNL Mute 27 Ms 3 Ms 3 0.1 µF 16 IF det. 0.1 µF IF-In 0.1 µF 17 680 pF VCC 100 µF 18 0.01 µF 100 kΩ 50 kΩ 19 20 0.1µF 10 kΩ 21 22 23 VCC 180 pF 2.2 kΩ 24 Mute-Adj. Seek/Lamp ST-Lamp: high (4.5 V or more) Seek: Open 100 kΩ SD-Adj. 0.01 µF 5