TEA6845AH Ver la hoja de datos (PDF) - Philips Electronics
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TEA6845AH Datasheet PDF : 48 Pages
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DAAIN
33
Vtune CPOUT
DGND
OSCFDB VDDA3
AFHOLD
AMAFIF2
VDDA4 fref VDDD
VCOGND OSCTNK
AFSAMPLE TRDSMUTE
RDSMPX FMMPX
34
35
36 37 38 39
40 41 42 43
44
45 46
47 48
49
VDDA2 VDDA1
50 51
32
DAATD
DAAOUT 31
ANTENNA
DAA
AM
30
T1FMAGC
29
T2FMAGC
28
IFMAGC
27
FMMIXIN2
26
RFGND
25
FMMIXIN1
FM
AGC
×
FM
I/Q MIXER
24
Vref(FMMIX)
90°
TUNING SYSTEM
10.25 MHz
VCO
WX
TEA6845AH
TEA6845H
N1
÷2
90°
AM-NOISE
DETECTOR
PEAK/
AVERAGE
BLANK
PULSE
SEQUENTIAL
CIRCUIT FOR
RDS UPDATING
AM
DETECTOR
MUTE
POWER
SUPPLY
I2C-bus
AM
IF AGC
AM
LEVEL
2 ms/20 ms
FM IF
IF
AM IF2 COUNT
I2C-BUS
LEVEL
DAA
DEMODULATOR
Σ
52
SDA
53
SCL
54
IF2GND
55
QDET1
56
QDET2
57 CAFC
58 Vlevel
IAMAGC
T2AMAGC
T1AMAGC
23
22 AM
21 RF AGC
N2
÷5/10
×
AM
MIXER2
FM
LIMITER/
LEVEL
20
AMMIX1IN1
×
AM
MIXER 1
IFAMP1
IFAMP2
19 18
17 16
15 14
13
AMMIX1IN2 MIX1OUT2 IFAMP1DEC IFAMP1IN
VDDA5 MIX1OUT1
VDDA6
12
11 10 9
8 7 65 4
3
21
IFAMP1OUT
Coffset
IF1GND
IFAMP2DEC IFAMP2IN AMIF2IN
FMLIMIN CAGC
AMIF2DEC FMLIMDEC
AMNBHOLD
IFAMP2OUT
Fig.1 Block diagram.
CRYSTAL
OSCILLATOR
59
XTAL1
60
XTALGND
61
XTAL2
62
Iref
63
AMMIX2OUT1
64
AMMIX2OUT2
MGU350
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