TDA5744 Datasheet, PDF (8/20 Pages) NXP Semiconductors – Low power mixers/oscillators for hyperband tuners

Philips Semiconductors
Low power mixers/oscillators for
hyperband tuners
Preliminary specification
TDA5744; TDA5745
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
UHF oscillator
f_osc
∆f_osc(V)
oscillator frequency
oscillator frequency shift
with supply voltage
∆f_osc(T)
∆f_osc(t)
Φ_osc
RSC_(p-p)
oscillator frequency drift
with temperature
oscillator frequency drift
with time
phase noise,
carrier-to-noise sideband
ripple susceptibility of V_CC
(peak-to-peak value)
446.15 −
∆V_CC = 5%; note 2
∆V_CC = 10%; worst case in the
frequency range; note 2
−
30
−
80
∆T = 25 °C; with compensation; worst −
600
case in the frequency range; note 3
worst case in the frequency range;
−
200
note 4
±100 kHz frequency offset; worst case −
106
in the frequency range
V_CC = 5 V; worst case in the frequency 15
20
range; ripple frequency 500 kHz; note 5
894.15 MHz
80
kHz
tbf
kHz
tbf
kHz
tbf
kHz
−
dBc/Hz
−
mV
Rejection at the IF amplifier output
INT_CHX
INT_S02
channel x beat
S02 beat
note 6
note 7
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 4.5 V or from V_CC = 5 to 5.25 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. Channel x beat: picture carrier frequency (f_pc) and sound carrier frequency (f_sc) both at 80 dBµV.
The rejection of the interfering product f_pc(RF) + f_sc(RF) − f_osc at 35.35 MHz should be >60 dB.
7. Channel S02: f_pc is 76.25 MHz at 70 dBµV; f_osc = 115.15 MHz.
The rejection of f_osc − 2 × f_IF = 37.35 MHz should be >66 dB.
1998 Mar 09
8