TDA9874A Philips Semiconductors, TDA9874A Datasheet - Page 22

• Manufacturer Part Number: TDA9874A
• Description: Digital TV sound demodulator/decoder
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Notes
1. Definition of levels and level setting:
2. Audio performance is limited by the dynamic range of the NICAM 728 system. Due to companding, the quantization
3. FM source; in dual mode only A (respectively B) signal modulated; measured at B (respectively A) channel output;
4. FM source; in stereo mode only L (respectively R) signal modulated; measured at R (respectively L) channel output;
5. If the supply voltage for the TDA9874A is switched off, because of the ESD protection circuitry, all audio input pins
6. The Philips crystal (order number 9922 520 20106) is suitable for this application.
1999 Dec 03
Crystal specification (fundamental mode)
f
C
C
C
R
R
X
X
X
xtal
T
J
D
A
SYMBOL
L
1
0
R
N
Digital TV sound demodulator/decoder
pull
a) The full-scale level for analog audio signals is V
b) Nominal audio input levels: external, mono: 500 mV; 9 dB (FS).
noise is never lower than 62 dB with respect to the input level.
V
V
are short-circuited.
o
o
= 1 V (RMS) of modulated channel.
= 1 V (RMS) of modulated channel.
is defined at 15 dB (FS).
crystal frequency
load capacitance
series capacitance
parallel capacitance
pulling sensitivity
equivalent series resistance
equivalent series resistance of
unwanted mode
temperature range
adjustment tolerance
drift
ageing
PARAMETER
note 6
C
18 to 16 pF
at nominal frequency
across temperature range
L
changed from
FS
CONDITIONS
= 1.4 V (RMS). The nominal level at the digital crossbar switch
22
2R
20
MIN.
R
24.576
20
20
25
+25
TYP.
Preliminary specification
TDA9874A
7
30
+70
30
30
5
MAX.
MHz
pF
fF
pF
10
10
10
-----------
10
-----------
year
UNIT
C
pF
–
–
6
6
6
6