TDA6651TT/C3,118 NXP Semiconductors, TDA6651TT/C3,118 Datasheet - Page 39

• Manufacturer Part Number: TDA6651TT/C3,118
• Description: IC MXR/OSC AND SYNTH 38-TSSOP
• Manufacturer: NXP Semiconductors

Specifications of TDA6651TT/C3,118

• Function: Mixer
• Package / Case: 38-TFSOP (0.173", 4.40mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 935277153118

NXP Semiconductors
TDA6650TT_6651TT_5
Product data sheet
12.1 PLL loop stability of measurement circuit
The TDA6650TT; TDA6651TT PLL loop stability is guaranteed in the configuration of
Figure
minimum, the pull-up resistor R19 is 15 k and all of the local oscillators are aligned to
operate at a maximum tuning voltage of 26 V. If the configuration is changed, there might
be an impact on the loop stability.
For any other configurations, a stability analysis must be performed. The conventional PLL
AC model used for the stability analysis, is valid provided the external source (DC supply
source or DC-to-DC converter) is able to deliver a minimum current that is equal to the
charge pump current in use.
Fig 25. Maximum RF input level without lock-out in low and mid band with asymmetrical
Fig 26. Maximum RF input level without lock-out in high band with asymmetrical IF output
27, 28,
Z
V
IF output
Loss in hybrid = 1 dB.
V
i
i
50
i
e
>> 50
= V
= V
meas
meas
e
29
V
source
signal
meas
+ 6 dB.
and 30. In this configuration, the external supply source is 30 V
loss.
50
V
voltmeter
V
i
RMS
= 2
Rev. 05 — 10 January 2007
V
source
signal
meas
50
V
meas
voltmeter
V
RMS
.
V
50
i
5 V mixer/oscillator and low noise PLL synthesizer
50
TDA6650TT; TDA6651TT
B
A
HYBRID
C
D
LBIN
or
MBIN
HBIN1
HBIN2
DUT
IFOUTA
IFOUTB
DUT
IFOUTA
IFOUTB
V
27
CCA
V
spectrum
analyzer
50
27
CCA
© NXP B.V. 2007. All rights reserved.
fce755
50
spectrum
analyzer
fce756
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