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PDF TDA7540B Data sheet ( Hoja de datos )
| Número de pieza | TDA7540B | |
| Descripción | AM/FM Car Radio Tuner IC | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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TDA7540B
AM/FM Car Radio Tuner IC with Stereo Decoder and
Intelligent Selectivity System (ISS)
Features
FM-Part
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■ RF AGC generation by RF and IF detection
■ I/Q mixer for 1st FM IF 10.7MHz with image
rejection
■ Mixer for 2nd IF 450kHz
■ Internal 450KHz bandpass filter with bandwidth
control by ISS
■ Fully integrated FM-demodulator with spike
cancellation
AM-Part
■ Wide and narrow AGC generation
■ Mixer for 1st IF 10.7MHz, AM upconversion
■ Mixer for 2nd IF 450kHz, AM downconversion
■ Integrated AM-demodulator
■ AM IF- and audio noise blanking
Stereodecoder
■ PLL with adjustment free, fully integrated VCO
■ Automatic pilot dependent MONO/STEREO
switching
■ Programmable ROLL-OFF compensation
■ High cut and stereo blend-characteristics
programmable
■ Dedicated RDS-mute
■ Internal noise blanker with several threshold
controls
TQFP80
Additional Features
■ VCO for world tuning range
■ High performance fast PLL for RDS-System
■ IF counter for FM and AM with search stop
signal
■ Quality detector for level, deviation, adjacent
channel and multipath
■ ISS (Intelligent Selectivity System) for
cancellation of adjacent channel and noise
influences
■ Adjacent channel mute
■ Fully electronic alignment
■ All functions I2C-Bus controlled
Description
The TDA7540 is a high performance tuner circuit
for AM/FM car radio. It contains mixer, IF
amplifier, demodulator for AM and FM,
stereodecoder, quality detection, ISS filter and
PLL synthesizer with IF counter on a single chip.
Use of BICMOS technology allows the
implementation of several tuning functions and a
minimum of external components.
Order codes
Part number
TDA7540B
Temp range, °C
-40 to 85
Package
TQFP80
Packing
Tube
May 2006
Rev 1
1/75
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75
1 page  
TDA7540B
Pins description and connection diagrams
2 Pins description and connection diagrams
2.1 TQFP80 pins connection diagram
Figure 2. TQFP80 pins connection (top view)
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MIX1 OUT1
TEST1
DEVTC
AMMIX1IN
AMMIX1REF
AMRFAGCOUT
AMPINDR
FMPINDR
FMMIX1IN1
GNDRF
FMMIX1IN2
TV1
TV2
ISSSTATUS
S1
FMAGCTC
S2
VCOB
VCOE
VCCVCO
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
1 60
2 59
3 58
4 57
5 56
6 55
7 54
8 53
9 52
10 51
11 50
12 49
13 48
14 47
15 46
16 45
17 44
18 43
19 42
20 41
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
VREF1
RXIN0AMIF2IN
MPXW
GNDDEM
FMREFDEMC
AMIF2REF
AMIF2BPF
MPXOUT
AFS
VCCSTEREO
MPXIN
MUTETC
MPTC
GNDSTEREO
QUALYOUT
FSWO
VCC1
L
R
GNDVCC1
D05AU1618
2.2
Pin description
Table 1.
Pin No.
1
2
3
4
5
6
7
8
9
10
11
Pin description
Pin Name
Function
MIX1OUT1
TEST1
DEVTC
AMMIX1IN
AMMIX1REF
AMRFAGCOUT
AMPINDR
FMPINDR
FMMIX1IN1
GNDRF
FMMIX1IN2
Mixer Tank 10.7MHz
Testing I/O Pin
Deviation Detector Time Constant
AM Mixer1 Input
AM Mixer1 Reference
Output AM RF AGC
AM PIN Diode Driver Output
FM PIN Diode Driver Output
FM Mixer1 Input1
RF Ground
FM Mixer1 Input2
5/75
5 Page 
TDA7540B
Electrical specifications
Table 5.
Electrical characteristics (continued)
(Tamb = 25°C, VCC1 = VCC2 = VCC3 = VCCST= VCCVCO = VCCMIX1 = VCCMIX2 = VCCIF1 = 8.5V,
fRF = 98MHz, dev= 40kHz, fMOD = 1kHz, fXtal = 10.25MHz, in application circuit, unless
otherwise specified).
Item Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
10.3
10.4
V65 Limiting sensitivity
G Mixer gain
S/N = 20dB
28 dBµV
18 dB
11 Limiter 1 (450kHz)
11.1 GLimiter Gain
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12 Demodulator, Audio Output
80 dB
12.1 THD
12.2
12.3
12.4
12.5
12.6
VMPX
ROUT
|∆V|min
|∆V|max
MPX output signal
Output impedance
DC offset fine adjust
DC offset fine adjust
S/N
12.7 VMPXW MPXW output signal
13 Quality Detection
Dev.= 75kHz, V65=
10mVRMS
Dev.= 75kHz
DEM, MENA=1
DEM, MENA=1
Dev.= 40kHz,V65 =
10mVRMS
Dev.= 75kHz
0.1 %
500 mVRMS
50 Ω
8.5 mV
264 mV
76 dB
350 mVRMS
S-meter, Unweighted Fieldstrength
13.1
13.2
13.3
13.4
13.5
13.6
13.7
13.8
V65
V22
V22
∆V22
∆V22
∆V22
ROUT
TK
Min. input voltage MIX2
Fieldstrength output
Fieldstrength output
voltage per decade
voltage per decade
S-meter offset
Output impedance
Temp coeff.
V65 = 20dBµV
V65 = 119dBµV
SMSL = 0
SMSL = 1
SL, SMSL=1
Adjacent Channel Gain
13.9
13.10
Gmin
Gmax
Gain minimum
Gain maximum
Adjacent Channel Filter
ACG=0
ACG=1
13.11
13.12
13.13
fHP
fBP
f-20dB
-3dB frequency highpass
Centre frequency
Attenuation 20dB
Adjacent Channel Output
ACF=0
ACF=1
13.14 V23 Output voltage low
13.15 V23 Output voltage high
30
0.1
4.9
1
1.5
-15
400
0
dBµV
V
V
V
V
15 dB
Ω
ppm/K
32 dB
38 dB
100 kHz
100 kHz
70 kHz
0.1 V
4.9 V
11/75
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