TDA8296 Datasheet, PDF (73/87 Pages) NXP Semiconductors – Digital global standard low IF demodulator for analog TV and FM radio

NXP Semiconductors
TDA8296
Digital global standard low IF demodulator for analog TV and FM radio
Table 65. Crystal parameters together with external components …continued
Fundamental
oscillation
frequency
10 MHz to
15 MHz
Crystal load
capacitance
C_L(xtal) (pF)
10
20
Crystal series
resistance
R_s(xtal) (Ω)
< 160
< 60
External load capacitors
C1 (pF)
C2 (pF)
18
18
39
39
15 MHz to
10
< 80
18
18
20 MHz
13.8 Alternative ADC sampling rates
In combination with a tuner front-end an alternative ADC sampling rates could be
necessary. Please refer to Table 66
The default register setting is adapted to 16 MHz reference frequency (either from crystal
or external source) and a nominal f_ADC = 54 MHz. In case of crosstalk of clock related
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. Alternative ADC clocks
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
50.75 MHz
101.50 MHz
16.00 MHz
203
16
2
01h
23h
63h
01h
CAh
1Eh
61h
54.00 MHz
108.00 MHz
16.00 MHz
27
2
2
01h
23h
63h
01h
1Ah
02h
61h
57.25 MHz
114.50 MHz
16.00 MHz
229
16
2
02h
23h
63h
01h
E4h
1Eh
61h
TDA8296
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 3 March 2011
© NXP B.V. 2011. All rights reserved.
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