tda9898 NXP Semiconductors, tda9898 Datasheet - Page 75
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tda9898
Manufacturer Part Number
tda9898
Description
Multistandard Hybrid If Processing Semiconductors
Manufacturer
NXP Semiconductors
Datasheet
1.TDA9898.pdf
(103 pages)
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NXP Semiconductors
TDA9897_TDA9898_3
Product data sheet
Fig 35. Front-end level diagram
antenna
(dB V)
input
level
(1) Signal levels for 1 dB video output level using maximum RF gain and maximum IF gain.
(2) Signal levels for +1 dB video output level using minimum IF gain.
(3) Signal levels for TOP-adjusted tuner output level using maximum RF gain and
(4) Signal levels for TOP-adjusted tuner output level using minimum RF gain and
(5) TOP-adjusted tuner output level.
(6) TOP-adjusted VIF amplifier input level.
(7) Minimum antenna input level at 1 dB video level.
120
100
80
60
40
20
0
Video signal related peak-to-peak levels are divided by factor 2 2 in order to conform with the
RMS value scale of the secondary y-axis, but disregarding the none sine wave signal content.
adjustment-related minimum IF gain.
adjustment-related minimum IF gain.
TD1716
(4)
(1)
(3)
tuner
control
range
(7)
gain
RF
Rev. 03 — 11 January 2008
band-pass
(6)
X3450L
(5)
(2)
amplifier
VIF
range limited
adjustment
by TOP
IF gain
control
TDA9897; TDA9898
IF demodulator, TDA989x
Multistandard hybrid IF processing
demodulator
IF gain
control
range
amplifier
© NXP B.V. 2008. All rights reserved.
video
001aaf639
1
10
10
10
10
10
10
IF signal
75 of 103
values
RMS
(V)
1
2
3
4
5
6