tda6503a NXP Semiconductors, tda6503a Datasheet - Page 24

• Manufacturer Part Number: tda6503a
• Description: 5 V Mixers/oscillators And Synthesizers For Cable Tv And Vcr 2-band Tuners
• Manufacturer: NXP Semiconductors

Philips Semiconductors
13 TEST AND APPLICATION INFORMATION
13.1
2001 Aug 22
handbook, full pagewidth
handbook, full pagewidth
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
Z
V
V
G
(a) For f
mixer A frequency response measured = 57 MHz, loss = 0 dB
image suppression = 16 dB
C1 = 9 pF
C2 = 15 pF
L1 = 7 turns (
l1 = 5 cm semi rigid RIM cable (33 dB/100 m, 50
i
i
o
v
>> 50
= V
= V’
= 20 log
Test circuits
meas
meas
RF
+ 6 dB = 80 dB V
= 50 MHz:
V
----- -
V
o
i
V
50
------------------ -
i
5.5 mm, wire
= 2
50
+
BNC
27
V
L1
meas
C1
e
= 80 dB V
= 0.5 mm)
50
Fig.13 Input circuit for optimum noise figure in VHF band.
C2
V meas
signal
source
(a)
I1
voltmeter
Fig.12 Gain measurement in VHF band.
V
RMS
RIM-RIM
and 96 pF/m).
50
PCB
plug
V i
VHFIN
24
D.U.T.
(b) For f
mixer A frequency response measured = 150.3 MHz, loss = 1.3 dB
image suppression = 13 dB
C3 = 5 pF
C4 = 25 pF
l2 = 30 cm semi rigid RIM cable (33 dB/100 m, 50
l3 = 5 cm semi rigid RIM cable (33 dB/100 m, 50
IFOUT
RF
BNC
= 150 MHz:
V o
C3
27
V' meas
C4
TDA6502; TDA6502A;
I2
TDA6503; TDA6503A
I3
(b)
spectrum
analyzer
50
FCE577
RIM-RIM
FCE578
Product specification
and 96 pF/m).
PCB
plug
and 96 pF/m).