TDA5630BT Datasheet, PDF (8/24 Pages) NXP Semiconductors – 9 V VHF and UHF mixer/oscillator for TV and VCR cable tuners

Philips Semiconductors
9 V VHF and UHF mixer/oscillator for TV
and VCR cable tuners
Product specification
TDA5630BT
handbook, full pagewidth
signal
50 Ω ^source
e
V _{meas V}
AIN
IF
out
50 Ω ^Vi
D.U.T.
RMS
voltmeter
GND
IF
out
TR
Vo
2x5
turns
2 ^V'meas
turns
N1/N2 = 5
spectrum
analyzer
50 Ω
MGD264
Z_in (AIN) >> 50 Ω V _i = 2 × V_meas.
V_i = V_meas + 6 dB.
V_o = V’_meas + 15.4 dB (transformer ratio N1/N2 = 5 and transformer loss).
G_v
=
20
log



-VV----^o-_{i }
Fig.3 Gain measurement in band A.
handbook, full pagewidth
BNC ^C1
L1
I1
PCB
plug
C2
RIM-RIM
(a)
I3
PCB
BNC ^C3
I2
plug
RIM-RIM
C4
(b)
MBE286 - 1
(a) For f_RF = 50 MHz:
mixer A frequency response measured = 57 MHz, loss = 0 dB
image suppression = 16 dB
C1 = 9 pF
C2 = 15 pF
L1 = 7 turns (diameter = 5.5 mm, wire diameter = 0.5 mm)
l1 = semi rigid cable (RIM): 5 cm long
(semi rigid cable (RIM); 33 dB/100 m; 50 Ω; 96 pF/m).
(b) For f_RF = 150 MHz:
mixer A frequency response measured = 150.3 MHz, loss = 1.3 dB
image suppression = 13 dB
C3 = 5 pF
C4 = 25 pF
l2 = semi rigid cable (RIM): 30 cm long
l3 = semi rigid cable (RIM): 5 cm long
(semi rigid cable (RIM); 33 dB/100 m; 50 Ω; 96 pF/m).
Fig.4 Input circuit for optimum noise figure in band A.
1996 Jun 06
8