TDA6650ATT NXP [NXP Semiconductors], TDA6650ATT Datasheet - Page 35

• Manufacturer Part Number: TDA6650ATT
• Description: 5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
TDA6650ATT_6651ATT_2
Product data sheet
Fig 16. Noise figure (NF) measurement in low and mid band with asymmetrical IF output
Fig 17. Input circuit for optimum noise figure measurement
a. Schematic 1
NF = NF
For f
Loss = 0 dB.
Cs = 0.8 pF to 8 pF trimmer.
Cp = 0.4 pF to 2.5 pF trimmer.
Lp = 4 turns, 4.5 mm, 0.4 mm wire air coil.
Cc = 4.7 nF.
TL: 50
connector
RF
BNC
= 150 MHz
meas
semi rigid cable length = 75 mm.
Cs
Lp
loss of input circuit (dB).
SOURCE
NOISE
Cp
Cc
TL
BNC
CIRCUIT
INPUT
to the IC
mixer input
Rev. 02 — 2 February 2007
RIM
TDA6650ATT; TDA6651ATT
LBIN
or
MBIN
5 V mixer/oscillator and low noise PLL synthesizer
connector
BNC
DUT
b. Schematic 2
IFOUTA
IFOUTB
For f
Loss = 0.5 dB.
Ls = 2 turns, 1.5 mm, 0.4 mm wire air coil.
Cp = 8.2 pF in parallel with a 0.8 pF to 8 pF trimmer.
Lp = 2 turns, 1.5 mm, 0.4 mm wire air coil.
Cc = 4.7 nF.
TL: 50
Ls
RF
Lp
= 300 MHz
semi rigid cable length = 75 mm.
V
CCA
27
Cp
Cc
FIGURE
METER
NOISE
fce750
TL
to the IC
mixer input
© NXP B.V. 2007. All rights reserved.
mce452
35 of 54