TDA6650ATT Datasheet, PDF (29/54 Pages) NXP Semiconductors – 5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)

NXP Semiconductors
TDA6650ATT; TDA6651ATT
5 V mixer/oscillator and low noise PLL synthesizer
[4] The RF frequency range is defined by the oscillator frequency range and the Intermediate Frequency (IF).
[5] The 1 % cross modulation performance is measured with AGC detector turned off (AGC bits set to 110).
[6] The IF output signal stays stable within the range of the step frequency for any RF input level up to 120 dBµV.
[7] Limits are related to the tank circuits used in Figure 27 and 28 for digital application or Figure 29 and 30 for hybrid application.
Frequency bands may be adjusted by the choice of external components.
[8] The frequency shift is defined as a change in oscillator frequency when the supply voltage varies from V_CC = 5 V to 4.5 V or from
V_CC = 5 V to 5.25 V. The oscillator is free running during this measurement.
[9] The frequency drift is defined as a change in oscillator frequency when the ambient temperature varies from T_amb = 25 °C to 50 °C or
from T_amb = 25 °C to 0 °C. The oscillator is free running during this measurement.
[10] The supply ripple susceptibility is measured in the measurement circuit according to Figure 27 to Figure 30 using a spectrum analyzer
connected to the IF output. An unmodulated RF signal is applied to the test board RF input. A sine wave signal with a frequency of
500 kHz is superimposed onto the supply voltage. The amplitude of this ripple signal is adjusted to bring the 500 kHz sidebands around
the IF carrier to a level of −53.5 dB with respect to the carrier.
[11] This is the level of divider interferences close to the IF frequency. The low and mid band inputs must be left open (i.e. not connected to
any load or cable); the high band inputs are connected to an hybrid.
[12] Crystal oscillator interference means the 4 MHz sidebands caused by the crystal oscillator.
[13] The step frequency rejection is the level of step frequency sidebands related to the carrier. The measurement is done for
V_IF = 100 dBµV. This specification point corresponds to the worst case observed in the frequency range. This parameter is specified for
f_step = 142.86 kHz in digital applications and f_step = 62.5 kHz, 50 kHz or 142.86 kHz in hybrid application.
[14] This is the level of the 13rd and 15th harmonics of the 4 MHz crystal oscillator into the IF output.
[15] The AGC pin (pin 9 for TDA6650ATT and pin 30 for TDA6651ATT) must not be connected to a voltage higher than 3.6 V.
1
2
0.5
5
0.2
10
−j
∞
10 5
2
1
0.5
0.2
0
40 MHz
+j
10
200 MHz
5
0.2
2
0.5
1
mce160
Fig 5. Input admittance (s₁₁) of the low band mixer (40 MHz to 200 MHz); Y_o = 20 mS
TDA6650ATT_6651ATT_2
Product data sheet
Rev. 02 — 2 February 2007
© NXP B.V. 2007. All rights reserved.
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