TEF6721HL/V1 NXP Semiconductors, TEF6721HL/V1 Datasheet - Page 10

• Manufacturer Part Number: TEF6721HL/V1
• Description: Tuners DIGITAL IF TUNER IC
• Manufacturer: NXP Semiconductors

Specifications of TEF6721HL/V1

• Bus Type: I2C
• Maximum Frequency: 9.99 MHz, 108 MHz
• Minimum Frequency: 5.73 MHz, 64 MHz
• Modulation Technique: AM, FM
• Mounting Style: SMD/SMT
• Package / Case: LQFP-64
• Function: Radio
• Noise Figure: 4.5 dB, 8.5 dB
• Operating Supply Voltage: 8.5 V
• Supply Voltage (min): 8 V
• Supply Voltage (max): 9 V
• Minimum Operating Temperature: - 40 C
• Maximum Operating Temperature: + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: TEF6721HL/V1,557

Philips Semiconductors
7
7.1
The FM quadrature mixer converts FM RF (64 to 108 MHz
and 162.4 to 162.55 MHz) to an IF of 10.7 MHz.
It provides inherent image rejection and high dynamic
range. The image rejection can be switched from ‘low’
injection Local Oscillator (LO) to ‘high’ injection LO via the
I
6 dB via the I
keyed AGC has to be lowered by 6 dB to prevent the mixer
from being overloaded.
7.2
The buffer output (pin WBFLAG) is HIGH for weather band
mode.
7.3
The varactor tuned LC oscillator provides the local
oscillator signal for both FM and AM mixers. It has a
frequency range from 159.9 to 248.2 MHz.
7.4
The crystal oscillator provides a 20.5 MHz signal that is
used for:
7.5
The fast synthesizer PLL tuning system with local control
is used for inaudible AF updating, combining fast PLL
jumps with low reference frequency breakthrough.
It is capable of tuning the following FM and AM bands:
2003 Oct 21
2
C-bus. The mixer conversion gain can be increased by
Reference frequency for frequency synthesizer PLL
Timing signal for the RDS update algorithm.
US FM and US IBOC DAB from 87.9 to 107.9 MHz
US weather FM from 162.4 to 162.55 MHz
Europe FM from 87.5 to 108 MHz
Japan FM from 76 to 91 MHz
East Europe FM from 64 to 74 MHz
LW from 144 to 288 kHz
MW from 522 to 1710 kHz (US AM band)
SW from 5.73 to 9.99 MHz (including the 31 m, 41 m
and 49 m bands).
Car radio tuner front-end for digital IF
FUNCTIONAL DESCRIPTION
FM I/Q-mixer
Buffer output for weather band flag
VCO
Crystal oscillator
PLL
2
C-bus. In this case the threshold of the FM
10
7.6
To reduce the number of manual alignments in production
the following I
(DAA) functions are included:
handbook, halfpage
FM RF DAA
– 7-bit DAC to control the conversion of the VCO tuning
– For cost reduction the diode at pin DAATD can be
Crystal frequency and general purpose DAA
– 5-bit DAC for adjustment of the crystal oscillator
voltage to FM antenna tank tuning voltage
omitted from this application. In this case, pin DAATD
must be connected to ground, which reduces the
available alignment range (see Fig.7)
frequency to align the actual IF frequency to the
centre frequency of IF selectivity inside the IF DSP. If
the IF DSP can be aligned to the actual IF frequency,
this DAA output can be used as general purpose
DAC. Figure 3 shows the application of the crystal
oscillator with frequency pulling.
Fig.3 Crystal oscillator with frequency pulling.
DAA
OSCILLATOR
CRYSTAL
CRYSTAL
DAA
2
C-bus controlled Digital Auto Alignment
60
59
58
57
2.7 pF
1 nF
Preliminary specification
20.5 MHz
100
k
TEF6721HL
BB201
100
k
22 nF
MDB413