tda5737a NXP Semiconductors, tda5737a Datasheet - Page 10

• Manufacturer Part Number: tda5737a
• Description: Tda5737a 5 V Vhf, Hyperband And Uhf Mixers/oscillators For Tv And Vcr 3-band Tuners
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2000 Dec 19
handbook, full pagewidth
handbook, full pagewidth
5 V VHF, hyperband and UHF
mixers/oscillators for TV and VCR 3-band tuners
(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 (diameter = 5.5 mm; wire diameter = 0.5 mm)
I1 = semi rigid cable (RIM): 5 cm long (semi rigid cable (RIM);
33 dB/100 m; 50 ; 96 pF/m).
See Fig.4 for input circuit.
NF = NF
RF
meas
= 50 MHz:
BNC
loss (input circuit) dB.
L1
C1
SOURCE
NOISE
C2
(a)
I1
Fig.4 Input circuit for optimum noise figure in band A.
RIM-RIM
BNC
Fig.5 Noise figure measurement in band A.
CIRCUIT
INPUT
PCB
plug
RIM
GND
AIN
(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
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).
10
D.U.T.
IFOUT1
IFOUT2
BNC
RF
= 150 MHz:
C3
N1/N2 = 5
turns
2 x 5
C4
MBL250
I2
TR
I3
(b)
2
turns
RIM-RIM
METER
NOISE
MBE286 - 1
Preliminary specification
PCB
plug
TDA5737A