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| ICs for FM/AM Tuner AN7261FBQ FM multiplex reception IC s Overview The AN7261FBQ is an FM-multiplex reception IC including a front-end and an IF block for FM tuner. Since the receiving circuit of FM multiplex signal is integrated on a single chip, it is most suitable for saving the space of sets. 24 17 Unit : mm 25 16 0.3+0.10 -0.05 7.00.3 0.6250.100 s Features * A single chip IC for an FM-multiplex tuner block, which was conventionally composed of two ICs. * Fewer external components * Can be used for 15 MHz IF 32 0.10.1 0.15+0.10 -0.05 0.6250.100 (0.55) 1 8 0.8 9 s Applications * VICS, RDS 7.00.3 9.20.4 LQFP032-P-0707 s Block Diagram Mute adj. VC adj. VCC1 Band 24 23 22 21 20 19 18 17 VREF GND1 25 26 27 28 29 30 31 VREF IF det. Mute 16 15 14 AFC SD adj. Det. IF limiter Band det. SD IF counter 13 12 11 10 OSC VC Level det. AGC amp. GND2 OSC AGC 32 1 IF amp. 2 3 Mix. 4 5 6 7 8 9 ADX RF in VCC2 N.C. 1.40.2 9.20.4 1 AN7261FBQ s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1st IF input GND for 1st IF input Mixer output 1 Mixer output 2 PIN diode driver Mix. Input VCC2 N.C. AGC output OSC buffer output GND2 OSC SD/IF counter output Detection output SD sensitivity adjustment AFC voltage output Description Pin No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 ICs for FM/AM Tuner Description Higher freguency correction adjustment VCC1 FM detection 2nd IF output Mute adjustment Mute voltage output Control voltage adjustment Band mute SW/band signal output VREF GND1 2nd IF input GND for 2nd IF input Control voltage output Keyed-AGC input AGC sensitivity adjustment 1st IF output s Absolute Maximum Ratings Parameter Supply voltage Supply current Power dissipation *2 Operating ambient temperature *1 Storage temperature *1 Symbol VCC ICC PD Topr Tstg Rating 9.1 66 343.6 -30 to +80 -55 to +150 Unit V mA mW C C 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 AN7261FBQ s Electrical Characteristics at VCC = 8 V, fIN1 = 98 MHz, fIN2 = 15 MHz, Ta = 25C Parameter Control voltage 1 Control voltage 2 Control voltage 3 Control voltage 4 Control voltage 5 Control voltage 6 Detection output level 1 Detection output level 2 Counter output level SD sensitivity SD bandwidth Symbol VC1 VC2 VC3 VC4 VC5 VC6 VO1 VO2 VIFC SDS SDW Conditions No signal input, DC voltage of pin 29 VIN2 = 60 dB, DC voltage of pin 29 VIN2 = 80 dB, DC voltage of pin 29 VIN2 = 100 dB, DC voltage of pin 29 VC5 = VC3-VC2 VC6 = VC4-VC3 VIN2 = 80 dB/1 kHz, 30%FM, AC voltage of pin 14 VIN2 = 80 dB/76 kHz, 10%FM, AC voltage of pin 14 VIN2 = 100 dB, V15 = 2 V, IFC output level VIN2 when V15 = 2 V, SD > 4 V Bandwidth when SD > 4 V, SD VIN2 = 100 dB VIN2 level, 30 kHz LPF on, and 1 kHz 30% FM when pin 14 AC voltage drops by 3 dB fOSC = 113 MHz, without input VIN1 = 80 dB, IF out level VIN1 level when V9 = 3 V VIN1 = 66 dB, V9 VIN1 = 78 dB, V9 Without input Min 0.0 0.7 1.8 3.0 1.0 1.05 70 37 150 61 90 Typ 0.05 1.25 2.4 3.7 1.2 1.25 90 47 180 71 115 Max 0.8 1.8 3.0 4.4 1.4 1.45 Unit V V V V V V 110 mV[rms] 57 mV[rms] 210 mV[rms] 81 140 dB kHz Limiting sensitivity VLIM 40 48 54 dB Local oscillation buffer output IF output level AGC sensitivity High-level AGC voltage Low-level AGC voltage Supply current VOS VIF SAGC VAH VAL ITOT 110 60 68 5.9 41 160 110 72 6.3 0.05 52 210 mV[rms] 170 mV[rms] 76 6.7 0.5 65 dB V V mA Note) FM tuning condition: Adjust the VT of application voltage so that OSC buffer output frequency becomes 113 MHz10 kHz. s Usage Notes 1. Use less than 10 k of external resistor of pin 31 2. Use this IC not to exceed allowable power dissipation value refering to the "s Technical Information". 3 AN7261FBQ s Technical Information 1. PD Ta curves of LQFP032-P-0707 P D Ta 1.600 ICs for FM/AM Tuner 1.400 1.388 1.200 Power dissipation PD (W) Mounted on standard board (grass epoxy : 50 mm x 50 mm x t0.8 mm) Rth(j-a) = 90.0C/W 1.000 0.800 0.613 0.600 Independent IC without heat shink Rth(j-a) = 203.7C/W 0.400 0.200 0.000 0 25 50 75 100 125 150 Ambient temperature Ta (C) 2. Specification for special parts Part IF coil Maker Sumida Maker part number 4162-T006 Specification Connection 3 2 1 6 4 Pin No. Turns 4-6 1-2 2-3 1-3 10T 11T 11T 11T LC value 12 pF10% Q at no load 50 or more (15 MHz) Detection coil Matsushita electronics parts SQF5EB033A 3 2 1 4 0.59 H 5.0% 4120% (15 MHz) 6 4 ICs for FM/AM Tuner s Application Circuit Example AN7261FBQ Band VCC 100 k 300 VC adj. 180 pF 18 VCC1 2.2 k 21 Mute adj. 18 pF 100 pF 0.1 F 50 k 24 23 22 20 19 VREF 25 0.1 F 17 1 F 3.9 k 16 SD adj. 15 14 1000 pF 1000 pF 51 k 100 k 0.1 F 100 F AFC Seek GND1 26 27 28 13 12 27 pF 3 pF VC 0.01 F 50 k 100 k 0.01 F 10 k Det. IFC SD 1000 pF 29 30 31 32 1 2 3 4 5 6 VCC2 7 N.C. 8 11 GND2 10 1000 pF VT OSC 9 1 F 470 330 RF in ADX AGC 5 |
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