tda8296 NXP Semiconductors, tda8296 Datasheet - Page 72

• Manufacturer Part Number: tda8296
• Description: Tda8296 Digital Global Standard Low If Demodulator For Analog Tv And Fm Radio
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8296
Product data sheet
13.7 Crystal connection
In applications, where the impedance of the CVBS termination is high (e.g. >1 kΩ), which
is normally the case with audio/video processor, the video and sound DAC can operate
with significant lower current. An application proposal (which leads to reduced power
consumption) is shown in
For application requirements, where both, connections to audio/video processor (with
input impedance >1 kΩ) and 75 Ω termination (e.g. to SCART output), are needed in
parallel, a buffer application can be used as sown in
The typical crystal frequency value is 16 MHz. The values of the passive components
depend on crystal manufacturer. The oscillator can be set in two configurations depending
on the origin of the crystal.
tuner and the TDA8296 (Slave mode),
TDA8296 (Oscillator mode).
In Oscillator mode, only a crystal and the load capacitances C1 and C2 need to be
connected externally since the feedback resistance is integrated on chip. For an accurate
time reference it is advised to use the load capacitors as specified in
typical load capacitance of the crystal and is usually specified by the crystal manufacturer.
Table 65.
Fundamental
oscillation
frequency
1 MHz to 5 MHz
5 MHz to 10 MHz
Fig 32. Reference clock application
Slave mode
Crystal parameters together with external components
clock signal
from tuner
XIN
Digital global standard low IF demodulator for analog TV and FM radio
All information provided in this document is subject to legal disclaimers.
100 nF
Crystal load
capacitance
C
10
20
30
10
20
30
TDA8296
L(xtal)
R bias
Rev. 1 — 3 March 2011
(pF)
Figure
008aaa142
n.c.
Figure 32
XOUT
24.
Crystal series
resistance
R
< 300
< 300
< 300
< 300
< 200
< 100
describes the case of an crystal shared with the
s(xtal)
Figure 33
(Ω)
Fig 33. Oscillator application
the case of an crystal dedicated to the
Figure
External load capacitors
C1 (pF)
18
39
56
18
39
56
Oscillator mode
XIN
25).
GND
C1
TDA8296
R bias
XTAL
Table
TDA8296
GND
© NXP B.V. 2011. All rights reserved.
008aaa143
C2 (pF)
18
39
56
18
39
56
XOUT
C2
65. C
L
is the
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