ICs for FM/AM Tuner AN7261FBQ FM multiplex reception IC ■ Overview Unit : mm 24 17 0.8 9.2±0.4 16 0.3+0.10 –0.05 25 7.0±0.3 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. 32 9 8 1.4±0.2 0.1±0.1 1 ■ Applications (0.55) 7.0±0.3 9.2±0.4 • VICS, RDS LQFP032-P-0707 0.625±0.100 • 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 0.15+0.10 –0.05 0.625±0.100 ■ Features 25 17 VCC1 18 19 20 21 22 VC adj. 23 Band 24 VREF Mute adj. ■ Block Diagram 16 IF det. VREF AFC Mute 26 27 15 14 IF limiter Band det. SD IF counter 28 SD adj. Det. 13 Level det. 29 12 30 11 AGC amp. 31 10 GND2 OSC OSC 9 8 AGC N.C. 7 VCC2 6 5 ADX 4 Mix. 3 2 IF amp. 32 1 VC RF in GND1 1 AN7261FBQ ICs for FM/AM Tuner ■ Pin Descriptions Pin No. Pin No. Description Description 1 1st IF input 17 Higher freguency correction adjustment 2 GND for 1st IF input 18 VCC1 3 Mixer output 1 19 FM detection 4 Mixer output 2 20 2nd IF output 5 PIN diode driver 21 Mute adjustment 6 Mix. Input 22 Mute voltage output 7 VCC2 23 Control voltage adjustment 8 N.C. 24 Band mute SW/band signal output 9 AGC output 25 VREF 10 OSC buffer output 26 GND1 11 GND2 27 2nd IF input 12 OSC 28 GND for 2nd IF input 13 SD/IF counter output 29 Control voltage output 14 Detection output 30 Keyed-AGC input 15 SD sensitivity adjustment 31 AGC sensitivity adjustment 16 AFC voltage output 32 1st IF output ■ Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage VCC 9.1 V Supply current ICC 66 mA Power dissipation *2 PD 343.6 mW Operating ambient temperature *1 Topr −30 to +80 °C Storage temperature *1 Tstg −55 to +150 °C Note) *1: Ta = 25°C except power dissipation, operating ambient temperature and storage temperature. *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 AN7261FBQ ■ Electrical Characteristics at VCC = 8 V, fIN1 = 98 MHz, fIN2 = 15 MHz, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Control voltage 1 VC1 No signal input, DC voltage of pin 29 0.0 0.05 0.8 V Control voltage 2 VC2 VIN2 = 60 dBµ, DC voltage of pin 29 0.7 1.25 1.8 V Control voltage 3 VC3 VIN2 = 80 dBµ, DC voltage of pin 29 1.8 2.4 3.0 V Control voltage 4 VC4 VIN2 = 100 dBµ, DC voltage of pin 29 3.0 3.7 4.4 V Control voltage 5 VC5 VC5 = VC3−VC2 1.0 1.2 1.4 V 1.45 V Control voltage 6 VC6 VC6 = VC4−VC3 1.05 1.25 Detection output level 1 VO1 VIN2 = 80 dBµ/1 kHz, 30%FM, AC voltage of pin 14 70 90 110 mV[rms] Detection output level 2 VO2 VIN2 = 80 dBµ/76 kHz, 10%FM, AC voltage of pin 14 37 47 57 Counter output level VIFC VIN2 = 100 dBµ, V15 = 2 V, IFC output level 150 180 210 mV[rms] SD sensitivity SDS VIN2 when V15 = 2 V, SD > 4 V 61 71 81 dBµ SD bandwidth SDW Bandwidth when SD > 4 V, SD VIN2 = 100 dBµ 90 115 140 kHz Limiting sensitivity VLIM VIN2 level, 30 kHz LPF on, and 1 kHz 30% FM when pin 14 AC voltage drops by 3 dB 40 48 54 dBµ Local oscillation buffer output VOS fOSC = 113 MHz, without input 110 160 210 mV[rms] IF output level VIF VIN1 = 80 dBµ, IF out level 60 110 170 mV[rms] AGC sensitivity SAGC VIN1 level when V9 = 3 V 68 72 76 dBµ High-level AGC voltage VAH VIN1 = 66 dBµ, V9 5.9 6.3 6.7 V Low-level AGC voltage VAL VIN1 = 78 dBµ, V9 0.05 0.5 V Supply current ITOT Without input 41 52 65 mA mV[rms] Note) FM tuning condition: Adjust the VT of application voltage so that OSC buffer output frequency becomes 113 MHz±10 kHz. ■ Usage Notes 1. Use less than 10 kΩ of external resistor of pin 31 2. Use this IC not to exceed allowable power dissipation value refering to the "■ Technical Information". 3 AN7261FBQ ICs for FM/AM Tuner ■ Technical Information 1. PD Ta curves of LQFP032-P-0707 P D Ta 1.600 1.400 1.388 Power dissipation PD (W) 1.200 Mounted on standard board (grass epoxy : 50 mm × 50 mm × t0.8 mm) Rth(j-a) = 90.0°C/W 1.000 0.800 0.613 0.600 Independent IC without heat shink Rth(j-a) = 203.7°C/W 0.400 0.200 0.000 0 25 50 75 100 125 150 Ambient temperature Ta (°C) 2. Specification for special parts Part Maker IF coil Sumida Maker part number 4162-T006 Specification Connection 3 4 2 4 SQF5EB033A 1 6 3 4 Detection Matsushita coil electronics 2 parts 1 6 Pin No. Turns 4-6 10T 1-2 11T 2-3 11T 1-3 11T LC value Q at no load 12 pF±10% 50 or more (15 MHz) 0.59 µH 41±20% ±5.0% (15 MHz) ICs for FM/AM Tuner AN7261FBQ Band ■ Application Circuit Example 0.1 µF 100 µF 100 pF 1 µF 3.9 kΩ 17 19 18 VCC1 2.2 kΩ 100 kΩ 300 Ω 18 pF 20 22 21 Mute adj. VC adj. 0.1 µF 50 kΩ 23 24 VREF 180 pF VCC 25 16 0.1 µF GND1 26 15 27 14 100 kΩ Seek 1000 pF 28 13 29 12 30 11 GND2 31 10 VC 27 pF 3 pF 1000 pF 51 kΩ Det. IFC SD 1000 pF VT OSC 1000 pF N.C. 8 VCC2 7 6 1 µF AGC RF in 330 Ω ADX 470 Ω 5 9 4 32 3 10 kΩ 2 50 kΩ 100 kΩ 0.01 µF 1 0.01 µF AFC SD adj. 5