tda9880t NXP Semiconductors, tda9880t Datasheet - Page 18

• Manufacturer Part Number: tda9880t
• Description: Alignment-free Multistandard Vision And Fm Sound If-pll Demodulator
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Notes
1. Values of video and sound parameters can be decreased at V
2. This parameter is tested with 110 mV to ensure maximum input level.
3. This parameter is not tested during production and is only given as application information for designing the television
4. Loop bandwidth BL = 70 kHz (damping factor d = 1.9; calculated with sync level within gain control range).
5. V
6. V
7. Broadband transformer at VIF input. The C/N ratio at VIF input is defined as the VIF input signal (sync level,
8. The sound carrier frequencies (depending on TV standard) are attenuated by the integrated sound carrier traps
9. S/N is the ratio of black-to-white amplitude to the black level noise voltage (RMS value, pin 13).
10. The intermodulation figures are defined:
11. Measurements taken with SAW filter M1963M (sound shelf: 20 dB); loop bandwidth BL = 70 kHz.
12. The sound carrier trap can be disabled by switching pin 12 to ground (<0.8 V). In this way the full composite video
13. Response time valid for a VIF input level range of 200 V to 70 mV.
2000 Nov 22
V
R
C
ref(rms)
o(ref)
K
Alignment-free multistandard vision and
FM sound IF-PLL demodulator
SYMBOL
receiver.
Calculation of the VIF-PLL filter can be done by use of the following formulae:
where:
K
R = loop resistor; C = loop capacitor; BL
modulation.
RMS value) related to a superimposed 4.2 MHz band-limited white noise signal (RMS value); white picture video
modulation.
(see Figs 12 to 17); H (s) is the absolute value of transfer function.
B = 4.2 MHz (M/N standard) or B = 5.0 MHz (B/G, I and D/K standard).
a) Modulation Vestigial Side-Band (VSB); sound carrier off; f
b) Sound carrier on; f
spectrum appears at pin 13. The amplitude is 1.1 V (p-p).
BL
d
O
i(VIF)(rms)
i(VIF)
d
d
=
–
0.92
2.76
= VCO steepness
3 dB
1
-- - R K
2
signal for nominal video signal.
=
=
=
20
20
= 10 mV; f = 1 MHz (VCO frequency offset related to picture carrier frequency); white picture video
------ - K
2
O
1
K
log
log
amplitude of reference signal
source (RMS value)
output resistance of reference
source
decoupling capacitance to
external reference source
D
O
C
K
V
-------------------------------------- -
V
V
-------------------------------------- -
V
,
D
0
0
0
0
R
at 3.58 MHz
at 0.92 MHz
at 3.58 MHz
at 2.76 MHz
video
, valid for d
PARAMETER
rad
------- -
V
= 10 kHz to 10 MHz.
or
2
+
; d
1.2
3.6 dB
Hz
------ -
V
2.76
; K
3 dB
value at 2.76 MHz referenced to chrominance carrier.
; d
D
= loop bandwidth for 3 dB; d = damping factor.
= phase detector steepness
operation as input
terminal
operation as input
terminal
0.92
value at 0.92 MHz referenced to black or white signal;
CONDITIONS
18
video
P
= 4.5 V.
> 0.5 MHz.
80
22
------- -
rad
MIN.
A
;
100
TYP.
Product specification
400
4.7
TDA9880T
MAX.
mV
k
pF
UNIT