TDA6650TT Datasheet, PDF (37/54 Pages) NXP Semiconductors – 5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)

NXP Semiconductors
TDA6650TT; TDA6651TT
5 V mixer/oscillator and low noise PLL synthesizer
signal
50 Ω source
A
C
e
V_meas ^V
50 Ω V_i ^HYBRID
RMS ^{50 Ω}
voltmeter
B
D
HBIN1 IFOUTA
27 Ω
DUT
V_o
spectrum
analyzer
V'_meas 50 Ω
HBIN2 IFOUTB
V_CCA
fce751
Loss in hybrid = 1 dB.
V_i = V_meas − loss = 70 dBµV.
V_o = V’_meas + 3.75 dB.
G_v = 20log ^V-_V----^o-_i .
DVB-T and PAL.
IF = 38.9 MHz.
Fig 20. Gain (G_V) measurement in high band with asymmetrical IF output
signal
50 Ω source
A
C
e
V_{meas V}
50 Ω Vi ^HYBRID
RMS 50 Ω
voltmeter
B
D
HBIN1 IFOUTA
transformer
DUT
C
HBIN2 IFOUTB
N1
V_o
N2
V'_meas
spectrum
analyzer
50 Ω
fce752
Loss in hybrid = 1 dB.
V_i = V_meas − loss = 70 dBµV.
V_o = V’_meas + 15 dB (transformer ratio N1/N2 = 5 and transformer loss).
G_v = 20log ^V-_V----^o-_i .
DVB-T and PAL.
IF = 38.9 MHz.
Fig 21. Gain (G_V) measurement in high band with symmetrical IF output
TDA6650TT_6651TT_5
Product data sheet
Rev. 05 — 10 January 2007
© NXP B.V. 2007. All rights reserved.
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