TDA6650ATT Datasheet, PDF (34/54 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
signal
50 Ω source
e
V_{meas V}
50 Ω
RMS
voltmeter
LBIN
or
IFOUTA
MBIN
DUT
V_i
IFOUTB
27 Ω
Vo ^V'meas
V_CCA
spectrum
analyzer
50 Ω
fce747
Z_i >> 50 Ω → V_i = 2 × V_meas = 70 dBµV.
V_i = V_meas + 6 dB = 70 dBµV.
V_o = V’_meas + 3.75 dB.
G_v = 20log -^VV----^o-_i .
ISDB-T and NTSC Japan.
IF = 57 MHz.
Fig 14. Gain (G_V) measurement in low and mid band with asymmetrical IF output
signal
50 Ω source
e
V_{meas V}
50 Ω
RMS
voltmeter
LBIN
or
IFOUTA
MBIN
DUT
C
V_i
IFOUTB
transformer
N1
V_o
N2
V'_meas
spectrum
analyzer
50 Ω
fce748
Z_i >> 50 Ω → V_i = 2 × V_meas = 70 dBµV.
V_i = V_meas + 6 dB = 70 dBµV.
V_o = V’_meas + 15 dB (transformer ratio N1/N2 = 5 and transformer loss).
G_v = 20log -^VV----^o-_i .
ISDB-T and NTSC Japan.
IF = 57 MHz.
N1 = 10 turns.
N2 = 2 turns.
N1/N2 = 5.
Fig 15. Gain (G_V) 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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