tda9874h NXP Semiconductors, tda9874h Datasheet - Page 47

• Manufacturer Part Number: tda9874h
• Description: Digital Tv Sound Demodulator/decoder
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Notes
1. The demodulation/decoding is still functional above and below the limits given.
2. Definition of levels and level setting (see Tables 74 and 75):
3. Audio performance is limited by the dynamic range of the NICAM 728 system. Due to companding, the quantization
4. FM source; in dual mode only A (respectively B) signal modulated; measured at B (respectively A) channel output;
5. FM source; in stereo mode only L (respectively R) signal modulated; measured at R (respectively L) channel output;
6. If the supply voltage for the TDA9874H is switched off, because of the ESD protection circuitry all audio input pins
7. The Philips crystal (order number 9922 520 20106) is suited for this application.
2000 Jun 26
Crystal output
V
V
G
C
C
f
C
C
C
R
R
X
X
X
xtal
T
osc(p-p)
bias(DC)
J
D
A
SYMBOL
o
RYSTAL SPECIFICATION
L
1
0
R
N
Digital TV sound demodulator/decoder
m
pull
a) The full-scale level for analog audio signals is 1.4 V (RMS).
b) The nominal level at the digital crossbar switch is defined at 15 dB (full-scale).
c) Nominal audio input levels for external and mono: 500 mV (RMS) at 9 dB (full-scale).
noise is never lower than 62 dB referenced to the input level.
V
V
are short-circuited.
o
o
= 1 V (RMS) of modulated channel.
= 1 V (RMS) of modulated channel.
oscillation amplitude
(peak-to-peak value)
DC bias voltage
mutual conductance at
24.576 MHz
output capacitance
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
FUNDAMENTAL MODE
)
note 7
C
at nominal frequency
across temperature range
L
changed from 18 to 16 pF
CONDITIONS
47
2.3
16.6
2R
MIN.
20
R
1.4
2.53
17.6
24.576
20
20
25
+25
TYP.
Product specification
TDA9874H
2.8
18.8
10
7
30
+70
MAX.
30
30
5
V
V
mS
pF
MHz
pF
fF
pF
10
10
10
-----------
10
-----------
year
UNIT
C
pF
–
–
6
6
6
6