TEA6842H Ver la hoja de datos (PDF) - Philips Electronics
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TEA6842H Datasheet PDF : 66 Pages
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DAAIN
Vtune CPOUT
DGND OSCFDB VDDA4
AFHOLD
AMAFIF2
TUSN
VDDA3 FREF VDDD
VCOGND OSCTNK
AFSAMPLE
TRDSMUTE
RDSMPX FMMPX VDDA5 VDDA6
40
42
43
44 45 46 47 48 49 50 51
53
54
55
56
57
58
59 60 61
39
DAATD
DAAOUT 38
ANTENNA
DAA
AM
T1FMAGC 37
36
T2FMAGC
35
IFMAGC
34
WBSW
33
FMMIXIN2
31
RFGND
30
FMMIXIN1
FM
AGC
×
FM
I/Q MIXER
TUNING SYSTEM
10.25 MHz
VCO
WX
TEA6842H
N1
÷2
90°
SEQUENTIAL
CIRCUIT FOR
RDS UPDATING
I2C-
bus SOFT MUTE
AM DETECTOR
MUTE
POWER
SUPPLY
62 USNBUF
I2C-bus
AM
IF AGC
FM IF
IF
AM IF2 COUNT
I2C-BUS
LEVEL
DAA
SOFT
MUTE
ULTRASONIC
NOISE
DETECTOR
63
SDA
64
SCL
65
MUTE
66
IF2GND
Vref(FMMIX)
IAMAGC
T2AMAGC
T1AMAGC
AMMIX1IN1
AMMIX1IN2
AMAGCBUF
WB
FLAG
29
90°
AM-NOISE
DETECTOR
PEAK/
AVERAGE
BLANK
PULSE
AM
LEVEL
Σ
28
27
AM
26 RF AGC
N2
÷ 5/10
×
AM
MIXER 2
FM
LIMITER/
LEVEL
23
22
21 AGC
BUFFER
×
AM
MIXER 1
20
19 18
IFAMP 1
IFAMP 2
17 16
14
12 11 10 9 8
7
654 3
2
1 79
MIX1OUT2 IFAMP1DEC IFAMP1IN
VDDA2 MIX1OUT1
VDDA1
IFAMP1OUT
IFAMP2DEC
Coffset
IF1GND
IFAMP2IN AMIF2IN
FMLIMIN CAGC
AMIF2DEC FMLIMDEC
IMUTEREF
AMNBHOLD
IFAMP2OUT
DEMODULATOR
67 QDET1
68 QDET2
69 CAFC
CRYSTAL
OSCILLATOR
70 Vlevel
71
XTAL1
72
XTALGND
73
XTAL2
74
USNSENS
75 TMUTE
76
IREF
77
AMMIX2OUT1
78
AMMIX2OUT2
13, 15, 24, 25, 32, 41, 52, 80
MHC358
n.c.
Fig.1 Block diagram.
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