TDA6508ATT/C3,118 NXP Semiconductors, TDA6508ATT/C3,118 Datasheet - Page 26

• 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
handbook, full pagewidth
3-band mixer/oscillator and PLL for
terrestrial tuners
Z
Hybrid loss = 1 dB.
V
V
G
PAL f
V
Wanted output signal at picture carrier frequency f
Unwanted output signal at sound sub-carrier frequency f
Measuring the level of unwanted signal causing 0.3% AM in the wanted signal.
f
f
f
RF(w)
RF(u)
osc
i
i
o
o
v
>> 50
= V
= V
= 20 log
= V
= 193.15 MHz (min.); 486.15 MHz (max.).
IF
e u
e w
= 159.75 MHz (min.); 452.75 MHz (max.).
i(meas)
50
50
= 154.25 MHz (min.); 447.25 MHz (max.).
o(meas)
o(meas)
= 36.15 MHz.
AM = 30%
symmetrical input.
unwanted
V
----- -
V
wanted
source
source
+ 3.75 dB.
signal
signal
+ 15 dB (transformer ratio N1/N2 and transformer loss).
o
loss + 6 + 3 = 80 dB V.
i
e
Fig.19 Cross-modulation measurement in the MID-band of the TDA6508; TDA6509.
50
A
B
HYBRID
Fig.18 Gain measurement in the MID-band of the TDA6508A; TDA6509A.
V i(meas)
C
D
signal
source
50
voltmeter
V
RMS
V i
50
50
50
A
B
HYBRID
RF(w)
; V
RF(u)
C
D
o(w)
B
A
HYBRID
; AM = 30%; AF = 2 kHz.
= 110 dB V.
MID_RFIN1
MID_RFIN2
C
D
IFAMP_OUT1
IFAMP_OUT2
D.U.T.
26
V i
MID_RFIN1
MID_RFIN2
IFAMP_OUT1
D.U.T.
V
o
turns
2 x 5
N1/N2 = 5
V o
2
turns
TDA6508; TDA6508A;
V o(meas)
TDA6509; TDA6509A
voltmeter
27
RMS
V
attenuator
18 dB
V o(meas)
38.9 MHz
spectrum
analyzer
FILTER
50
MDB260
Product specification
modulation
analyzer
50
MDB253