tda5745ts NXP Semiconductors, tda5745ts Datasheet - Page 11

• Manufacturer Part Number: tda5745ts
• Description: Low Power Mixers/oscillators For Hyperband Tuners
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1998 Mar 09
handbook, full pagewidth
handbook, full pagewidth
Low power mixers/oscillators for
hyperband tuners
(a) For f
VHF mixer frequency response measured = 57 MHz;
loss = 0 dB.
Image suppression = 16 dB.
C1 = 1 nF; C2 = 2.2 pF.
L1 = 7 turns (
I1 = semi rigid cable (RIM): 5 cm long.
(semi rigid cable (RIM); 33 dB/100 m; 50 ; 96 pF/m) .
F = F
meas
RF
= 50 MHz:
loss (of input circuit) (dB).
BNC
5.5 mm; wire
L1
C1
SOURCE
NOISE
= 0.5 mm).
C2
Fig.8 Input circuit for optimum noise figure in the VHF band.
(a)
I1
Fig.9 Noise figure (F) measurement in the VHF band.
RIM-RIM
BNC
CIRCUIT
INPUT
PCB
plug
RIM
VHFIN IFOUT1
11
D.U.T.
(b) For f
VHF mixer frequency response measured = 150.3 MHz;
loss = 1.3 dB.
Image suppression = 13 dB.
C3 = 1 nF; C4 = 2.2 pF.
I2 = semi rigid cable (RIM): 30 cm long.
I3 = semi rigid cable (RIM): 5 cm long.
(semi rigid cable (RIM); 33 dB/100 m; 50 ; 96 pF/m).
IFOUT2
BNC
RF
C3
= 150 MHz:
C
C4
I2
T
I3
(b)
TDA5744; TDA5745
RIM-RIM
FIGURE
METER
NOISE
MGL277
MBE286 - 1
Preliminary specification
PCB
plug