TDA6405ATS datasheet(14/32 Pages) PHILIPS

14 / 32 page

1999 Jan 13

Philips Semiconductors

Product speciﬁcation

5 V mixer/oscillator-PLL synthesizers for

hyperband tuners

TDA6404; TDA6405;

TDA6405A

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

VCC = 5 to 4.75 V (4.5 V) or from VCC = 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

Tamb =25to0 °C or from Tamb =25to50 °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 dB

µV and the

sideband components is reached.

6. This is the level of divider interferences close to the IF frequency. For example:

Ch S1: fosc = 144.15 MHz and 1⁄4fosc = 36.0375 MHz.

Ch S2: fosc = 151.15 MHz and 1⁄4fosc = 37.7875 MHz.

Ch S14: fosc = 291.15 MHz and 1⁄8fosc = 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 dB

µV.

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 dB

µV, fREF = 7.8125 kHz.

9. Channel x beat: picture carrier frequency (69.25 MHz) and sound carrier frequency (74.75 MHz) both at 80 dB

µV,

fosc at 108.15 MHz. The rejection of the interfering product RF picture carrier frequency + RF sound carrier

frequency

− fosc at 35.85 MHz should be >60 dB.

10. Channel S02: picture carrier frequency is 76.25 MHz at 80 dB

µV, fosc = 115.15 MHz.

The rejection of fosc − 2 × fIF = 37.35 MHz should be >66 dB.

REJECTION AT THE IF AMPLIFIER OUTPUT

INTDIF

level of divider

interferences in the IF

signal

note 6

−

µV

INTRXTAL

crystal oscillator

interferences rejection

note 7

−−

dBc

INTRFREF reference frequency

rejection

note 8

−−

dBc

INTCHX

channel x beat

note 9

−−

dBc

INTS02

S02 beat

note 10

−−

dBc

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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