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PDF TDA7541 Data sheet ( Hoja de datos )

Número de pieza TDA7541
Descripción AM/FM Car Radio Tuner IC
Fabricantes STMicroelectronics　
Logotipo STMicroelectronics Logotipo



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No Preview Available ! TDA7541 Hoja de datos, Descripción, Manual

TDA7541
AM/FM car radio tuner IC with stereo decoder
and intelligent selectivity system
Features
■ FM part
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–
–
AGC generation by RF and IF detection
I/Q mixer for 1st IF 10.7MHz with image
rejection
Mixer for 2nd IF 450kHz
– Internal 450kHz band pass filter with
bandwidth control by ISS
– Fully integrated FM demodulator with noise
cancellation
■ AM part
– Wide and narrow AGC generation
– Mixer for 1st IF 10.7MHz, AM upconversion
– Mixer for 2nd IF 450kHz
– Integrated AM-demodulator
– AM IF noise blanking
■ Stereo decoder
– 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
– Audio noise blanker
■ Additional features
– VCO for world tuning range
LQFP64
– 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
– Independend weather band input
– All functions I2C bus controlled
Description
The TDA7541 is a high performance tuner circuit
with stereo decoder for AM/FM car radio. It
contains a mixer, IF amplifier, demodulator for AM
and FM, stereo decoder, 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.
Table 1. Device summary
Order code
TDA7541
TDA7541TR
TDA7541W
TDA7541WTR
Package
LQFP64 (10 x 10 x 1.4mm)
LQFP64 (10 x 10 x 1.4mm)
LQFP64 (14 x 14 x 1.4mm)
LQFP64 (14 x 14 x 1.4mm)
Packing
Tray
Tape and reel
Tray
Tape and reel
January 2008
Rev 3
1/76
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1

1 page




TDA7541 pdf
TDA7541
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
www.DataSheet4UF.ciogmure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Block circuit diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Programming of HC filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Programming of stereo blend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Adaptive threshold control of noise blanker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Stereo blend controlled threshold adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Deviation controlled threshold adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Block diagram FM part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Block diagram VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Block diagram ISS function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Block diagram AM path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Block diagram stereo decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Block diagram audio noise blanker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Block diagram multi path detection for stereo decoder. . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
LQFP64 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
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TDA7541 arduino
TDA7541
Electrical specifications and characteristics
Table 5.
Globals (continued)
(Tamb = 25°C, VCC1 = VCC2 = VCCMIX1 = VCCVCO = VCCIF = 8.5V, fXtal = 10.25 MHz,
in application circuit, unless otherwise specified)
Item Symbol
Parameter
Test conditions Min. Typ. Max. Unit
1.12
1.13
ICCMIX1
ICCIF
Supply Current
Supply Current
2. Reference voltages
AM ON
20 24 mA
4 5 mA
2.1 VREF1 Internal reference voltage
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VREF2 Internal reference voltage
3. I2C bus interface
IREF1 = 0mA
IREF2 = 0mA
4.8 5 5.2
2.4 2.5 2.6
V
V
3.1 fSCL Clock frequency
3.2 VIL Input low voltage
3.3 VIH Input high voltage
3.4 IIN Input current
3.5 VO Output acknowledge voltage IO = 1.6mA
3
-5
400 kHz
1V
V
5 µA
0.4 V
Table 6. FM section
(Tamb = 25°C, VCC1 = VCC2 = VCCMIX1 = VCCVCO = VCCIF = 8.5V, fXtal = 10.25 MHz,
fRF = 98MHz, dev = 40 kHz, fMod = 1 kHz, in application circuit, unless otherwise specified)
Item Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
4. Wide band RF AGC
4.1 V8-10 Lower threshold start
4.2 V8-10 Upper threshold start
4.3 Δ V8-10 Control range RF KAGC
5. Narrow band IF & keying AGC
5.1 V61 Lower threshold start
5.2 V61 Upper threshold start
5.3
V61
Max. IFAGC threshold
with KAGC
5.4 V37 Start point KAGC
5.5 Δ V61 Control range IF KAGC
6. AGC time constant output
V13 = 2.5V,RFK “0”
V13 = 2.5V,RFK”0”
KAGC”000”,RFAGC”00”,
V37 = 3.0….3.7V, RFK”1”
KAGC = off, V8-10 = 0mVRMS
KAGC = off, V8-10 = 0mVRMS
KAGC”000”,IFAGC”00”,
V37 = 3.0V
KAGC”000”,IFAGC”00”,
KAGC”000”,IFAGC”00”,
V37 = 3.2….3.9V
6.1 V13 Max. AGC output voltage V8-10= 0mVRMS
6.2 V13 Min. AGC output voltage V8-10 = 100mVRMS
6.3 I13 Min. AGC charge current V8-10= 0mVRMS,V13 = 2.5V
79 dBμV
93 dBμV
5 8 11
82
94
97
3.2 3.4
12 15
dBµV
dBµV
dBµV
3.6 V
18 dB
VREF1
+VBE
0.5
V
V
-33 -25 -17.5 µA
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