AN7298

AN7298FBP PANASONIC

Document overview

• Manufacturer or author: Provided By digicamel.com
• PDF pages: 6

Technical content

FM-IF, NC, and MPX IC for car radio n Overview The AN7298FBP is an IC for car radio. The FM-IF, NC (Noise Canceler) and MPX functions are integrated into a single chip. The IC has the higher functions than our conventional IC (AN7292NSC) and the characteris- tics of multi-pass detection, mute and SD functions are improved. n Features

• IF sensitivity is high. (limiting sensitivity 26 dBm)
• Adjustment-free VCO (912 kHz)
• Good linearity of S-meter output (adjusting funciton) n Applications
• Car radios QFH048-P-1212 Unit: mm 14.2±0.4 12.0±0.3 0.3±0.10.8 14.2±0.4 12.0±0.3 (0.55) 0.1±0.1 2.8±0.2 1.3±0.1 1.3±0.1 0.15 +0.10 –0.05 36 25

AN7298FBP ICs for FM/AM Tuner n Block Diagram 2nd limiter Reg. V cont det. V cont DC amp. 1st limiter Multipath detector ASC .ATC stereo demod. Pilot det. Divider VCO Pilot canceler PNL Pulse det. AGC Mute amp. Quad det. AFC amp. Band det. SD IF count. GND V CC

ICs for FM/AM Tuner AN7298FBP Pin No. Description

1 ASC adjustment

2 ATC adjustment

3 Separation adjustment

4 ATC LPF

5 R-ch. output 6 L-ch. output

7 Control voltage output

8 Band mute control

9 Soft mute filter

10 Phase detection filter1

11 Forced monaural

12 Phase detection filter 2-1

13 SD startup time constant setting

14 Phase detection filter 2-2

15 VCO

16 Phase detection filter 3

17 Pilot canceler negation filter

18 PNL LPF

19 PNL LPF

20 PNL gate pulse filter

21 PNL AGC

22 PNL input

23 PNL HPF

24 IF-counter output stop

Pin No. Description

25 IF detection output

26 PNL output hold

27 SD/IF counter output

28 SD sensitivity adjustment

29 AFC output

30 V CC

31 IF detection coil

32 Limiter output

33 Soft mute adjustment

34 Stereo lamp drive

36 GND

37 Mute adjustment

39 Reference voltage

42 IF input

43 Mute slope adjustment

44 Control voltage adjustment

45 Control voltage output

46 Control voltage input

47 ASC

48 Control voltage detection

n Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage V CC 9.7 V Supply current I CC 48 mA Power dissipation *2 PD 301 mW Operating ambient temperature *1 T opr -30 to +80 °C Storage temperature *1 Tstg -55 to +125 °C Note) *1 : All parameter values except for the power dissipation, the operating ambient temperature and the storage temperature are Ta = 25°C. *2 : Power dissipation of IC alone at Ta = 80°C.

AN7298FBP ICs for FM/AM Tuner Parameter Symbol Conditions Min Typ Max Unit Control voltage 1 V C1 Without input, pin 45 DC voltage 0.05 0.50 0.90 V Control voltage 2 V C2 V IN = 40 dBm, pin 45 DC voltage 1.20 1.65 2.10 V Control voltage 3 V C3 V IN = 70 dBm, pin 45 DC voltage 2.75 3.45 4.15 V Control voltage 4 V C4 V IN =100 dBm, pin 45 DC voltage 4.45 5.35 6.25 V Control voltage 5 V C5 V C5 = VC3 -V C2 1.60 1.80 2.00 V Control voltage 6 V C6 V C6 = VC4 -V C3 1.70 1.90 2.10 V AFC offset voltage V AFC Without input, DC voltage between- 0.1 0.0 0.1 V pin 29 and pin 39 Output level L V OL V IN = 70dBm, pin 6 AC voltage 90 110 130 mV[rms] Output level R V OR V IN = 70dBm, pin 5 AC voltage 90 110 130 mV[rms] Channel balance CB CB = 20Log (VOL /VOR ) -1.0 0.0 1.0 dB Limiting sensitivity V lim V OL to 0 dB. Input when pin 6 20.0 26 30.0 dB m AC voltage drops by 3 dB Residual pilot voltage V PC Pin 26 output when VIN = 70 dBm, ¾ 4 14.0 mV[rms] pilot signal 10% modulation Stereo lamp on-level Lamp ON Modulation with pilot signal only, 1.0 3.5 6.0 % DC voltage of pin 34 is below 2 V Stereo lamp off-level Lamp OFF Modulation with pilot signal only. 2.0 6.0 10.0 dB Ratio of stereo lamp on and off level Separation L-ch. Sep L V IN = 70 dBm, L+R = 90% 25 33 ¾ dB Pilot 10% Separation R-ch. Sep R V IN = 70 dBm, L+R = 90% 25 33 ¾ dB Pilot 10% Capture range CR V IN = 70 dBm, + 0.6 +0.8 ¾ % pilot signal 6.5% modulation -0.2 0.4 Counter output level 1 V IF1 V IN = 70 dBm, pin 28 = 0V, 0 2.0 5.0 mV[rms] pin 27 10.7 MHz, output voltage Counter output level 2 V IF2 V IN = 70 dBm, pin 28 = VCC , 85 100 115 mV[rms] pin 27 AC output voltage Power supply current I tot Without input, pin 11 = 0 V 28.0 35.0 42.0 mA Monaural THD (L-ch.) THD L Monaural input 400 mV, 1kHz, ¾ 0.15 0.3 % L-ch. distortion Monaural THD (R-ch.) THD R Monaural input 400 mV, 1kHz, ¾ 0.15 0.3 % R-ch. distortion n Electrical Characteristics at VCC = 8 V, fIN = 10.70 MHz, fmod = 1 kHz 30%FM, Ta = 25°C n Recommended Operating Range Parameter Symbol Range Unit Supply voltage V CC 7.2 to 9.6 V

ICs for FM/AM Tuner AN7298FBP n Electrical Characteristics at VCC = 8 V, fIN = 10.70 MHz, fmod = 1 kHz 30%FM, Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit Stereo THD (L-ch.) THD SL Stereo, L+R = 360 mV,VP = 40 mV, ¾ 0.15 0.3 % L-ch. distortion Stereo THD (R-ch.) THD SR Stereo, L+R = 360 mV,VP = 40 mV, ¾ 0.15 0.3 % R-ch. distortion AGC voltage 1 V AGC1 Input = 0, RS = 600 W, ¾ 0.0 0.4 V pin 21 DC voltage AGC voltage 2 V AGC2 Input VIN2 = 2 mV[rms], 1.3 1.48 1.65 V 150 kHz, pin 21 DS voltage Noise detection voltage V DET V IN2 = 100 mV[rms],150 kHz, ¾ 0.0 0.3 V pin 20 DC voltage Gate pulse width PW V IN2 = 0.3 V[p-p], tW =1 ms, 19 24 29 ms f=1 kHz, pin 26 output pulse width Residual noise voltage V NR V IN2 =1 V[p-p], tW =10 ms, f=1 kHz, ¾ 0.0 1.2 mV[rms] input through LPF, L-ch. output SD bandwidth SDW Bandwidth when SD output (pin 110 140 170 kHz 27) is over 4.5 V, V28 = 2.7 V SD sensitivity SDS Input when SD output (pin 27) is 45 55 65 dB m over 4.5 V, V28 = 2.7 V

AN7298FBP ICs for FM/AM Tuner n Application Circuit Example Monaural Stereo Forced monaural Band mute On Off R out L out IF counter stop IF input 50 W V cont V ref V CC (8 V) GND AFC output SD output Counter output VA F (IF detection output)