TDA6650ATT Datasheet, PDF (36/54 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
AM = 30 %
50 Ω
1 kHz
A
C
unwanted
e_u
signal
source
HYBRID
50 Ω
B
D
wanted
e_w
signal
source
LBIN
or IFOUTA
MBIN
DUT
27 Ω
V_o
10 dB
attenuator
FILTER
V ^Vmeas
57 MHz
IFOUTB
50 Ω
V_CCA
RMS
voltmeter
modulation
analyzer
50 Ω
001aac095
V_o = V_meas + 3.75 dB.
V’_meas = V_o − (transformer ratio N1/N2 = 5 and loss).
Wanted signal source at f_RFpix is 80 dBµV.
Unwanted output signal at f_snd.
The level of unwanted signal is measured by causing 0.3 % AM modulation in the wanted signal.
N1 = 10 turns.
N2 = 2 turns.
N1/N2 = 5.
Fig 18. Cross modulation measurement in low and mid band with asymmetrical IF output
AM = 30 %
50 Ω 1 kHz
unwanted
e_u
signal
source
AC
HYBRID
50 Ω
BD
wanted
e_w
signal
source
LBIN
or
MBIN
IFOUTA
DUT
C
IFOUTB
50 Ω
6 dB
transformer ^attenuator
FILTER
N1
V_o
N2 V _V'meas
57 MHz
RMS
voltmeter
modulation
analyzer
50 Ω
001aac096
V’_meas = V_o − (transformer ratio N1/N2 = 5 and loss).
Wanted signal source at f_RFpix is 80 dBµV.
The level of unwanted signal V_o at f_snd is measured by causing 0.3 % AM modulation in the wanted output signal.
N1 = 10 turns.
N2 = 2 turns.
N1/N2 = 5.
Fig 19. Cross modulation measurement in low and mid band with symmetrical IF output
TDA6650ATT_6651ATT_2
Product data sheet
Rev. 02 — 2 February 2007
© NXP B.V. 2007. All rights reserved.
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