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PDF TDA7512 Data sheet ( Hoja de datos )
| Número de pieza | TDA7512 | |
| Descripción | AM/FM CAR RADIO TUNER IC WITH INTELLIGENT SELECTIVITY SYSTEM ISS | |
| Fabricantes | ST Microelectronics | |
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TDA7512
AM/FM CAR RADIO TUNER IC WITH INTELLIGENT
SELECTIVITY SYSTEM (ISS)
PRELIMINARY DATA
FM-PART
s RF AGC GENERATION BY RF AND IF
DETECTION
s I/Q MIXER FOR 1ST FM IF 10.7MHz WITH
IMAGE REJECTION
s 2 PROGRAMMABLE IF-GAIN STAGES
s MIXER FOR 2nd IF 450KHz
s INTERNAL 450KHz BANDPASS FILTER WITH
THREE BANDWIDTHS CONTROLLED BY ISS
s FULLY INTEGRATED FM-DEMODULATOR
WITH NOISE CANCELLATION
TQFP64
ORDERING NUMBER: TDA7512
AM-PART
s WIDE AND NARROW AGC GENERATION
s PREAMPLIFIER AND MIXER FOR 1ST IF
10.7MHz, AM UPCONVERSION
s MIXER FOR 2nd IF 450KHz
s INTEGRATED AM-DEMODULATOR
s OUTPUT FOR AM-STEREO-DECODER
ADDITIONAL FEATURES
s VCO FOR WORLD TUNING RANGE
s HIGH PERFORMANCE FAST PLL FOR RDS-
SYSTEM
s IF COUNTER FOR FM AND AM WITH
SEARCH STOP SIGNAL
s QUALITY DETECTOR FOR LEVEL,
DEVIATION, ADJACENT CHANNEL AND
MULTIPATH
s QUALITY DETECTION INFORMATIONS AS
ANALOG SIGNALS EXTERNAL AVAILABLE
s ISS (INTELLIGENT SELECTIVITY SYSTEM)
FOR CANCELLATION OF ADJACENT
CHANNEL AND NOISE INFLUENCES
s ADJACENT CHANNEL MUTE
s FULLY ELECTRONIC ALIGNMENT
s ALL FUNCTIONS I2C-BUS CONTROLLED
s ISS FILTER STATUS INFORMATION I2C-BUS
READABLE
DESCRIPTION
The TDA7512 is a high performance tuner circuit for
AM/FM car radio. It contains mixer, IF amplifier, de-
modulator for AM and FM, quality detection, ISS filter
and PLL synthesizer with IF counter on a single chip.
Use of BICMOS technology allows the implementa-
tion of several tuning functions and a minimum of ex-
ternal components.
September 2003
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1/42
1 page  
PIN DESCRIPTION (continued)
N° Pin Name
46
FMMIX2IN1
FM IF1 MIX2 Input2
47
GNDDEM
Ground FM Demodulator
48
VREF1
Reference 5V
49
GNDVCC2
Analog Ground
50 FMAMP2OUT FM IF1 Amplifier2 Output
51
VCC2
Analog Supply
52
FMAMP2IN
FM IF1 Amplifier2 Input
53
FMIF1REF
FM IF1 Amplifier Reference
54 FMAMP1OUT FM IF1 Amplifier1 Output
55 AMMIX2OUT2 AM Tank 450kHz
56 AMMIX2OUT1 AM Tank 450kHz
57
FMAMP1IN
FM IF1 Amplifier1 Input
58
AMIF1IN/ISS
AM IF1 Input/ISS filter status
59
GNDIF1
FM IF1 Ground
60 FMIF1AGCIN FM IF1 AGC Input
61
VCCIF1
IF1 Supply
62 AMRFAGCTC AM RF AGC Time Constant
63
MIX1OUT2
MIX Tank 10.7MHz
64
MIX1OUT1
MIX Tank 10.7MHz
THERMAL DATA
Table 1.
Symbol
Rth(j-a)
Parameter
Thermal resistance junction to ambient
ABSOLUTE MAXIMUM RATINGS
Table 2.
Symbol
VS
Tamb
Tstg
Supply Voltage
Ambient Temperature
Storage Temperature
Parameter
Function
TDA7512
Value
68 max.
Unit
°C/W
Value
10.5
-40 to 85
-55 to +150
Unit
V
°C
°C
5/42
5 Page 
TDA7512
Table 3. ELECTRICAL CHARACTERISTICS (continued)
Tamb = +25°C, VCC1 = VCC2 = VCC3 = VCCVCO = VCCMIX1 = VCCIF1=8.5V, fRF = 98MHz, dev. = 40kHz,
fMOD = 1kHz, fIF1 = 10.7MHz, fIF2 = 450KHz, fXtal = 10.25MHz, in application circuit, unless otherwise
specified.
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
V15 High voltage
ISSCTL = 1
4.9 V
ISS Filter Switch Threshold
V15 Threshold ISS on
ISSCTL = 0
3V
V15 Threshold ISS off
V15 Threshold ISS narrow on
V15 Threshold ISS narrow off
I20 Charge current low
I20 Charge current high
I20 Discharge current low
I20 Discharge current high
DEVWTH Internal low threshold
DEVWTH Internal high threshold
ISSCTL = 0
ISSCTL = 0
ISSCTL = 0
TDEV
TDEV
TDEV
TDEV
DWTH
DWTH
1V
4V
2V
-20 µA
-34 µA
6 µA
20 µA
30 kHz
75 kHz
RATIOmi Referred to threshold
n
DTH
1
RATIOm Referred to threshold
ax
Softmute
DTH
1.5
VANT Upper startpoint
SMTH, SMD, SLOPE = 0
VANT lower startpoint
SMTH, SMD, SLOPE = 0
aSMmin Min. softmute depth
SMD, SLOPE = 0, SMTHUpper
aSMmax Max. softmute depth
SMD, SLOPE = 0, SMTHUpper
aSMTHIS Mute depth threshold for ISS filter SMCTH
S on
10
3
18
36
0.2
dBµV
dBµV
dB
dB
2 dB
VACTH Internal AC mute threshold
aSMAC AC mute depth
I42 Charge current
I42 Discharge current
S/N Over All
ACM
ACMD
60 340 mV
4 10 dB
-47.5
µA
2.5 µA
S/N
VANT_min = 60dBµV,
66
dB
dev.= 40kHz,LP=15KHz
deemphasis t = 50µs
11/42
11 Page | ||
| Páginas | Total 42 Páginas | |
| PDF Descargar | [ Datasheet TDA7512.PDF ] | |
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