TDA6650ATT Datasheet, PDF (38/54 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
NOISE
SOURCE
A
C
HYBRID
B
D
50 Ω
HBIN1 IFOUTA
DUT
27 Ω
NOISE
FIGURE
METER
HBIN2 IFOUTB
V_CCA
fce753
Loss in hybrid = 1 dB.
NF = NF_meas − loss.
Fig 22. Noise figure (NF) measurement in high band with asymmetrical IF output
AM = 30 %
50 Ω 1 kHz
unwanted
e_u
signal
source
AC
HYBRID
50 Ω
B
wanted
e_w
signal
source
D
50 Ω
AC
HYBRID
BD
50 Ω
27 Ω
HBIN1 IFOUTA
10 dB
attenuator
FILTER
DUT
V_o
V Vmeas
HBIN2 IFOUTB
V_CCA
RMS
voltmeter
57 MHz
V_o = V_meas + 3.75 dB.
Wanted signal source at f_RFpix is 70 dBµV.
Unwanted output signal at f_snd.
The level of unwanted signal is measured by causing 0.3 % AM modulation in the wanted signal.
Fig 23. Cross modulation measurement in high band with asymmetrical IF output
modulation
analyzer
50 Ω
001aac097
TDA6650ATT_6651ATT_2
Product data sheet
Rev. 02 — 2 February 2007
© NXP B.V. 2007. All rights reserved.
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