TDA7421 Просмотр технического описания (PDF) - STMicroelectronics

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TDA7421

AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS

STMicroelectronics 

TDA7421

AM TEST CIRCUIT

VMIX1AMIN

15pF

VXTAL

15pF

VMiXOUT

330

T2

VMiX2AMIN

T3

VCC

12

2K

VCC

64 63 61

60 58

57 55

54

AGC

W&N

1

2

35

2K

34

11

1M

12

+-

AGC2

DET

33

40

VAMSD

41

VAMSMETER

31

32

2

1

VIF2AMPIN

VIF2AMPOUT

D97AU803A

FM TEST CIRCUIT

VMiXFMIN

T1

1:3.5

VTun

T2

VCC

3

61

VTun

5K

V1

L2

22pF

1.8K

4

8

15pF

9

68pF

330

VMIXOUT

VFMIFAGCIN

10nF

10nF

VFMAMP1OUT

10nF

10nF

330

10nF

VFMAMP2OUT

10nF

330

10nF

60

59

53 52

51

330

330

-

+

50 49

48

330

330

-

+

46

330

45

10nF

10nF

VFMLIMIN

VFMRFAGCIN

VFMAGCOUT

10nF

10nF

5

FM AGC

6

AUDIO

38

DEMOD

L6

37

14

15

16

40

41

39

42

31

VAMTADJ VRFADJ VPLLOUT VFMSD VSMSHIFT VAUDIO

100K

VMUTEDRIVE

10nF

VSMFILT

D97AU804A

14/38

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