TDA6404 Datasheet, PDF (14/32 Pages) NXP Semiconductors – 5 V mixer/oscillator-PLL synthesizers for hyperband tuners

Philips Semiconductors
5 V mixer/oscillator-PLL synthesizers for
hyperband tuners
Product specification
TDA6404; TDA6405;
TDA6405A
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
REJECTION AT THE IF AMPLIFIER OUTPUT
INT_DIF
level of divider
interferences in the IF
signal
note 6
−
20
−
dBµV
INTR_XTAL crystal oscillator
interferences rejection
note 7
60
−
−
dBc
INTRF_REF reference frequency
rejection
note 8
50
−
−
dBc
INT_CHX
INT_S02
channel x beat
S02 beat
note 9
note 10
60
−
−
dBc
66
−
−
dBc
Notes
1. This is the level of the RF signal (100% amplitude modulated with 11.89 kHz) that causes a 750 Hz frequency
deviation on the oscillator signal; it produces sidebands 30 dB below the level of the oscillator signal.
2. The frequency shift is defined as the change of the oscillator frequency when the supply voltage varies from
V_CC = 5 to 4.75 V (4.5 V) or from V_CC = 5 to 5.25 V (5.5 V). The oscillator is free-running during this measurement.
3. The frequency drift is defined as the change of the oscillator frequency when the ambient temperature varies from
T_amb = 25 to 0 °C or from T_amb = 25 to 50 °C. The oscillator is free-running during this measurement.
4. The switching on drift is defined as the change of the oscillator frequency between 5 seconds and 15 minutes after
switching on. The oscillator is free-running during this measurement.
5. The ripple susceptibility is measured for a 500 kHz ripple at the IF amplifier output using the measurement circuit;
the level of the ripple signal is increased until a difference of 53.5 dB between the IF carrier set at 100 dBµV and the
sideband components is reached.
6. This is the level of divider interferences close to the IF frequency. For example:
Ch S1: f_osc = 144.15 MHz and ¹â„₄f_osc = 36.0375 MHz.
Ch S2: f_osc = 151.15 MHz and ¹â„₄f_osc = 37.7875 MHz.
Ch S14: f_osc = 291.15 MHz and ¹â„₈f_osc = 36.39375 MHz.
The VHF RF input must be left open (i.e. not connected to any load or cable).
The UHF RF inputs are connected to a hybrid.
7. Crystal oscillator interference means the 4 MHz sidebands caused by the crystal oscillator.
The rejection should be >60 dB for an IF output signal of 100 dBµV.
8. The reference frequency rejection is the level of reference frequency sidebands related to the sound subcarrier.
The rejection should be >50 dB for an IF output signal of 100 dBµV, f_REF = 7.8125 kHz.
9. Channel x beat: picture carrier frequency (69.25 MHz) and sound carrier frequency (74.75 MHz) both at 80 dBµV,
f_osc at 108.15 MHz. The rejection of the interfering product RF picture carrier frequency + RF sound carrier
frequency − f_osc at 35.85 MHz should be >60 dB.
10. Channel S02: picture carrier frequency is 76.25 MHz at 80 dBµV, f_osc = 115.15 MHz.
The rejection of f_osc − 2 × f_IF = 37.35 MHz should be >66 dB.
1999 Jan 13
14