TDA6650TT Datasheet, PDF (34/55 Pages) NXP Semiconductors – 5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)

Philips Semiconductors
5 V mixer/oscillator and low noise PLL synthesizer
for hybrid terrestrial tuner (digital and analog)
Product specification
TDA6650TT;
TDA6651TT
handbook, full pagewidth
signal
50 Ω source
A
C
e
Vmeas _V
50
Ω
Vi ^HYBRID
RMS
voltmeter
50
Ω
B
D
HBIN1 IFOUTA
transformer
DUT
C
HBIN2 IFOUTB
N1
Vo
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 N2/N1 = 5 and transformer
loss).
G_v = 20 log ^V-V----o-_i .
DVB-T and PAL.
IF = 38.9 MHz.
Fig.21 Gain (G_Vs) measurement in high band with symmetrical IF output.
handbook, full pagewidth
NOISE
SOURCE
50
Ω
A
C
HYBRID
B
D
HBIN1 IFOUTA
DUT
27 Ω
NOISE
FIGURE
METER
HBIN2 IFOUTB
VCCA
FCE753
Loss in hybrid = 1 dB.
NF = NF_meas − loss.
Fig.22 Noise figure (NF) measurement in high band with asymmetrical IF output.
2004 Mar 22
34