tda6508 NXP Semiconductors, tda6508 Datasheet - Page 23

• Manufacturer Part Number: tda6508
• Description: 3-band Mixer/oscillator And Pll For Terrestrial Tuners
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2005 Mar 25
handbook, full pagewidth
3-band mixer/oscillator and PLL for
terrestrial tuners
(a) f
LOW band mixer frequency response measured = 57 MHz, loss = 0 dB.
image suppression = 16 dB.
C1 = 9 pF.
C2 = 15 pF.
L1 = 7 turns (
l1 = semi-rigid (RIM) cable, length = 5 cm (33 dB/100 m,
50
NF = NF
RF
and 96 pF/m).
= 50 MHz:
meas
Fig.13 Noise figure measurement in the LOW and MID-bands of the TDA6508; TDA6509.
input circuit loss (dB).
5.5 mm, wire
BNC
L1
SOURCE
C1
NOISE
Fig.12 Input circuit for optimum noise figure in LOW and MID-bands.
= 0.5 mm).
C2
(a)
I1
BNC
CIRCUIT
INPUT
RIM-RIM
RIM
PCB
plug
GND
LOW_RFIN or
MID_RFIN
23
D.U.T.
IFAMP_OUT1
IFAMP_OUT2
(b) For f
MID band mixer frequency response measured = 150.3 MHz,
loss = 0 dB.
image suppression = 13 dB.
C3 = 5 pF.
C4 = 25 pF.
l2 = semi-rigid (RIM) cable, length = 30 cm.
l3 = semi-rigid (RIM) cable, length = 5 cm (33 dB/100 m,
50
and 96 pF/m).
BNC
RF
= 150 MHz:
C3
N1/N2 = 5
turns
2 x 5
C4
TDA6508; TDA6508A;
I2
TDA6509; TDA6509A
2
turns
I3
(b)
METER
NOISE
RIM-RIM
mdb263
FCE578
Product specification
PCB
plug