tda8296 NXP Semiconductors, tda8296 Datasheet - Page 73
tda8296
Manufacturer Part Number
tda8296
Description
Tda8296 Digital Global Standard Low If Demodulator For Analog Tv And Fm Radio
Manufacturer
NXP Semiconductors
Datasheet
1.TDA8296.pdf
(87 pages)
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TDA8296
Product data sheet
13.8 Alternative ADC sampling rates
Table 65.
In combination with a tuner front-end an alternative ADC sampling rates could be
necessary. Please refer to
The default register setting is adapted to 16 MHz reference frequency (either from crystal
or external source) and a nominal f
signals (e.g. n × 54 MHz) into the RF input of connected tuner circuit, the potential
disturbance of the wanted TV channel can be avoided by switching to the alternative
ADC clock frequencies of 50.75 MHz or 57.25 MHz.
Table 66.
Fundamental
oscillation
frequency
10 MHz to
15 MHz
15 MHz to
20 MHz
Frequencies
ADC SR
Clock PLL
Xtal frequency
Divider
M
N
P
Registers
Register 2Bh
Register 38h
Register 3Eh
Register 3Fh
Register 40h
Register 41h
Register 41h
Crystal parameters together with external components
Alternative ADC clocks
Digital global standard low IF demodulator for analog TV and FM radio
All information provided in this document is subject to legal disclaimers.
Crystal load
capacitance
C
10
20
10
L(xtal)
Rev. 1 — 3 March 2011
(pF)
Table 66
ADC
50.75 MHz
101.50 MHz
16.00 MHz
203
16
2
01h
23h
63h
01h
CAh
1Eh
61h
Crystal series
resistance
R
< 160
< 60
< 80
s(xtal)
= 54 MHz. In case of crosstalk of clock related
(Ω)
54.00 MHz
108.00 MHz
16.00 MHz
27
2
2
01h
23h
63h
01h
1Ah
02h
61h
External load capacitors
C1 (pF)
18
39
18
…continued
TDA8296
© NXP B.V. 2011. All rights reserved.
57.25 MHz
114.50 MHz
16.00 MHz
229
16
2
02h
23h
63h
01h
E4h
1Eh
61h
C2 (pF)
18
39
18
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