TDA6651TTC1 NXP Semiconductors, TDA6651TTC1 Datasheet - Page 35

• Manufacturer Part Number: TDA6651TTC1
• Manufacturer: NXP Semiconductors

Specifications of TDA6651TTC1

• Package Type: TSSOP
• Lead Free Status / Rohs Status: Compliant

NXP Semiconductors
TDA6650TT_6651TT_5
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 in low and mid band
a. Schematic 1
NF = NF
For f
Loss = 0 dB.
Cs = 12 pF in parallel with a 0.8 pF to 8 pF trimmer.
Cp = 18 pF in parallel with a 0.8 pF to 8 pF trimmer.
Cc = 4.7 nF.
Lp = 8 turns,
TL = 50
For f
Loss = 0 dB.
Cs = 0.8 pF to 8 pF trimmer.
Cp = 0.4 pF to 2.5 pF trimmer.
Cc = 4.7 nF.
Lp = 4 turns,
TL = 50
connector
RF
RF
BNC
= 50 MHz (Schematic 1)
= 150 MHz (Schematic 1)
meas
semi rigid cable, length = 75 mm.
semi rigid cable, length = 75 mm.
Cs
Lp
loss of input circuit (dB).
5 mm, wire
4.5 mm, wire
SOURCE
NOISE
Cp
Cc
= 0.4 mm air coil
= 0.4 mm air coil
TL
BNC
CIRCUIT
INPUT
to the IC
mixer input
Rev. 05 — 10 January 2007
RIM
LBIN
or
MBIN
5 V mixer/oscillator and low noise PLL synthesizer
connector
TDA6650TT; TDA6651TT
BNC
DUT
b. Schematic 2
IFOUTA
IFOUTB
For f
Loss = 0.5 dB.
Cp = 8.2 pF in parallel with a 0.8 pF to 8 pF trimmer.
Cc = 4.7 nF.
Ls = 2 turns,
Lp = 2 turns,
TL = 50
Ls
RF
Lp
= 300 MHz (Schematic 2)
semi rigid cable, length = 75 mm.
V
CCA
27
1.5 mm, wire
1.5 mm, wire
Cp
Cc
FIGURE
METER
NOISE
fce750
TL
= 0.4 mm air coil.
= 0.4 mm air coil.
to the IC
mixer input
© NXP B.V. 2007. All rights reserved.
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