TDA6508ATT/C3,118 NXP Semiconductors, TDA6508ATT/C3,118 Datasheet - Page 25

• 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
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 , symmetrical input.
= V
= V
= 20 log
= V
= 82.15 MHz (min.); 200.15 MHz (max.).
IF
= 48.75 MHz (min.); 166.75 MHz (max.).
i(meas)
= 43.25 MHz (min.); 161.25 MHz (max.).
o(meas)
o(meas)
= 36.15 MHz.
e w
e
e u
V
----- -
V
+ 15 dB (transformer ratio N1/N2 and transformer loss).
+ 3.75 dB (transformer ratio N1/N2 and transformer loss).
o
loss + 6 + 3 = 80 dB V.
i
Fig.16 Cross-modulation measurement in the LOW-band of the TDA6508A; TDA6509A.
50
50
50
V
i(meas)
AM = 30%
Fig.17 Gain measurement in the MID-band of the TDA6508; TDA6509.
unwanted
signal
source
wanted
source
source
signal
signal
voltmeter
V
RMS
B
A
HYBRID
50
50
C
D
RF(w)
; V
50
A
B
HYBRID
V i
RF(u)
o(w)
; AM = 30%; AF = 2 kHz.
= 100 dB V.
LOW_RFIN
C
D
IFAMP_OUT1
D.U.T.
V
i
25
MID_RFIN1
MID_RFIN2
IFAMP_OUT1
IFAMP_OUT2
D.U.T.
V o
27
voltmeter
RMS
V
V
attenuator
o
V o(meas)
18 dB
turns
2 x 5
N1/N2 = 5
TDA6508; TDA6508A;
TDA6509; TDA6509A
2
turns
38.9 MHz
FILTER
V
o(meas)
mdb259
Product specification
modulation
analyzer
50
spectrum
50
analyzer
MDB262