TDA6508ATT/C3,118 NXP Semiconductors, TDA6508ATT/C3,118 Datasheet - Page 27

• Manufacturer Part Number: TDA6508ATT/C3,118
• Manufacturer: NXP Semiconductors

Specifications of TDA6508ATT/C3,118

• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
2005 Mar 25
handbook, full pagewidth
3-band mixer/oscillator and PLL for
terrestrial tuners
Hybrid loss = 1 dB.
V
V
G
PAL f
V
Wanted output signal at fpix; V
Unwanted output signal at fsnd; AM = 30%; AF = 2 kHz.
Measuring the level of unwanted signal causing 0.3% AM in the wanted signal.
f
f
f
RF(w)
RF(u)
osc
i
o
e w
v
e u
o
= V
= V
= 20 log
= V
= 193.15 MHz (min.); 486.15 MHz (max.).
IF
i(meas)
= 159.75 MHz (min.); 452.75 MHz (max.).
= 154.25 MHz (min.); 447.25 MHz (max.).
o(meas)
o(meas)
= 36.15 MHz.
50
50
e
V
----- -
V
+ 15 dB (transformer ratio N1/N2 and transformer loss).
+ 3.75 dB.
loss = 70 dB V.
o
i
Fig.20 Cross-modulation measurement in the MID-band of the TDA6508A; TDA6509A.
AM = 30%
unwanted
wanted
source
source
signal
signal
50
V
i(meas)
Fig.21 Gain measurement in the HIGH-band of the TDA6508; TDA6509.
signal
source
B
A
HYBRID
o(w)
voltmeter
V
RMS
= 100 dB V.
C
D
50
50
50
V i
50
HYBRID
A
B
A
HYBRID
B
C
D
C
D
V
MID_RFIN1
MID_RFIN2
i
27
IFAMP_OUT1
HIGH_RFIN1
HIGH_RFIN2
D.U.T.
IFAMP_OUT1
IFAMP_OUT2
D.U.T.
V o
V
27
o
turns
2 x 5
voltmeter
RMS
N1/N2 = 5
V
TDA6508; TDA6508A;
TDA6509; TDA6509A
attenuator
V o(meas)
18 dB
2
turns
V
o(meas)
mdb257
38.9 MHz
FILTER
Product specification
spectrum
analyzer
50
modulation
analyzer
50
MDB254