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PDF TEF6621 Data sheet ( Hoja de datos )

Número de pieza TEF6621
Descripción Tuner on main-board IC
Fabricantes NXP Semiconductors 
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No Preview Available ! TEF6621 Hoja de datos, Descripción, Manual

TEF6621
Tuner on main-board IC
Rev. 01.04 — 7 August 2008
Objective data sheet
1. General description
The TEF6621 is an AM/FM radio including Phase-Locked Loop (PLL) tuning system. The
system is designed in such a way, that it can be used as a world-wide tuner covering
common FM and AM bands for radio reception. All functions are controlled by the I2C-bus.
Besides the basic feature set it provides a good weak signal processing function.
2. Features
I FM tuner for Japan, Europe and US reception
I AM tuner for Long Wave (LW) and Medium Wave (MW) reception
I Integrated AM Radio Frequency (RF) selectivity
I Integrated PLL tuning system; controlled via I2C-bus
I Fully integrated Local Oscillator (LO)
I No alignment needed
I Very easy application on the main board
I No critical RF components
I Fully integrated Intermediate Frequency (IF) filters and FM stereo decoder
I Fully integrated FM noise blanker
I Field strength (LEVEL), multipath [Wideband AM (WAM)] and noise [UltraSonic Noise
(USN)] dependent stereo blend
I Field strength (LEVEL), multipath (WAM) and noise (USN) dependent High-Cut
Control (HCC)
I Field strength (LEVEL), multipath (WAM) and noise (USN) dependent soft mute
I Single power supply
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TEF6621 pdf
NXP Semiconductors
TEF6621
Tuner on main-board IC
Table 3. Pin description …continued
Symbol
Pin Description
SDA
19 I2C-bus data input and output
VREF
20 reference voltage decoupling
VREGSUP
21
supply voltage internal voltage regulators
VCC1
GND
22 supply voltage 1
23 ground
VCODEC
24
decoupling for Voltage-Controlled Oscillator (VCO) supply voltage
PLL 25 PLL tuning voltage
PLLREF 26 PLL reference voltage
TEST
27 test pin; leave open in normal operation
AMSELIN1
28
AM selectivity input 1
AMSELIN2
29
AM selectivity input 2
AMIFAGC1
30
AM IF AGC 1
AMSELOUT1 31
AM selectivity output 1
AMSELOUT2 32
AM selectivity output 2
7. Functional description
7.1 FM tuner
The RF input signal is mixed to a low IF with inherent image suppression. The IF signal is
filtered and demodulated. The complete signal path is fully integrated.
7.2 AM tuner
The RF signal is filtered and mixed to a low IF with inherent image suppression. The IF
signals are filtered and demodulated. The signal path is highly integrated.
7.3 PLL tuning system
The PLL tuning system includes a fully integrated VCO. To avoid problems with unwanted
signals on image side, the receiver controls automatically high-side or low-side injection.
7.4 FM stereo decoder
The MPX signal from the FM tuner is translated by the stereo decoder into a left and right
audio channel. Good channel separation is achieved without alignment.
7.5 Weak signal processing and noise blanker
The reception quality of the station received is measured by a combination of detectors:
field strength (LEVEL), multipath (WAM) and noise (USN). The audio processing functions
soft mute, HCC and stereo blend are controlled accordingly to maintain the best possible
audio quality in case of poor signal conditions. Audio disturbances like e.g. ignition noise
are suppressed by the noise blanker circuit, using USN detection on MPX and spike
detection on the level signal.
TEF6621_1
Objective data sheet
Rev. 01.04 — 7 August 2008
© NXP B.V. 2008. All rights reserved.
5 of 58
Free Datasheet http://www.datasheet4u.com/

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TEF6621 arduino
NXP Semiconductors
TEF6621
Tuner on main-board IC
Table 60. Dynamic characteristics …continued
VCC = 8.5 V; Tamb = 25 °C; unless otherwise specified.
FM condition: all RF voltages refer to an unterminated RMS voltage with a source impedance 75 ; fmod = 1 kHz,
f = 22.5 kHz, de-emphasis = 50 µs, fRF = 97.1 MHz; unless otherwise specified.
AM condition: all RF voltages are RMS values measured at the input of a 15 pF/60 pF dummy aerial; fmod = 400 Hz,
m = 30 %, fRF = 990 kHz; unless otherwise specified.
All values measured in a test circuit according to Figure 29; default settings; audio signals measured at LOUT and ROUT with
IEC tuner filter (200 Hz to 15 kHz; IEC 60315-4); unless otherwise specified.
Symbol
Parameter
Conditions
Min Typ Max Unit
(S+N)/N
signal plus noise-to-noise Vi(RF) = 10 mV
ratio
50 56 -
dB
fIF
αimage
Bfltr(IF)
Sstat
Vi(RF)(max)
IF frequency
image rejection
IF filter bandwidth
static selectivity
maximum RF input
voltage
fRF(image) = fRF(wanted) ± 2 × fIF
3 dB bandwidth
ftune ± 10 kHz
ftune ± 20 kHz
THD = 10 %; m = 80 %; active antenna
50
- 25 -
40 55 -
5 6.5 8
40 48 -
65 78 -
120 135 -
kHz
dB
kHz
dB
dB
dBµV
IP2 second-order intercept
point
150 170 -
dBµV
IP3 third-order intercept point f = 40 kHz
116 127 -
dBµV
AM LNA and AM RF AGC; input pins AMRFIN and AMRFDEC
Ri
input resistance
fRF = 990 kHz
Ci
input capacitance
AGC maximum gain
MW band with passive antenna (measured with dummy aerial 15 pF/60 pF)
-
[1][2] -
20 -
530 -
pF
Vi(RF)AGC
AGC RF input voltage
switched LNA AGC: Vi(RF) value, at
which the LNA gain decreases with
increasing Vi(RF); m = 0 %; start of AGC;
first step
110 113 116 dBµV
Vi(RF)AGC(hys) hysteresis of AGC RF
input voltage
hysteresis of AGC start
147
dB
MW band with active antenna (measured with dummy aerial 50 )
Vi(RF)AGC
AGC RF input voltage
switched LNA AGC: Vi(RF) value, at
which the LNA gain decreases with
increasing Vi(RF); m = 0 %; start of AGC;
first step
78 81 84
dBµV
Vi(RF)AGC(hys) hysteresis of AGC RF
input voltage
hysteresis of AGC start
136
dB
LW band with passive antenna (measured with dummy aerial 15 pF/60 pF)
Vi(RF)AGC
AGC RF input voltage
switched LNA AGC: Vi(RF) value, at
which the LNA gain decreases with
increasing Vi(RF); fRF = 207 kHz;
m = 0 %; start of AGC; first step
- 104 -
dBµV
Vi(RF)AGC(hys) hysteresis of AGC RF
input voltage
hysteresis of AGC start
147
dB
TEF6621_1
Objective data sheet
Rev. 01.04 — 7 August 2008
© NXP B.V. 2008. All rights reserved.
44 of 58
Free Datasheet http://www.datasheet4u.com/

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