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TDA9850 데이터시트(PDF) 10 Page - NXP Semiconductors

부품명 TDA9850
상세설명  I2C-bus controlled BTSC stereo/SAP decoder
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제조업체  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA9850 데이터시트(HTML) 10 Page - NXP Semiconductors

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1995 Jun 19
10
Philips Semiconductors
Preliminary specification
I2C-bus controlled BTSC stereo/SAP decoder
TDA9850
REQUIREMENTS FOR THE COMPOSITE INPUT SIGNAL TO ENSURE CORRECT SYSTEM PERFORMANCE
Notes
1. Low-ohmic preferred, otherwise the signal loss and spreading at COMP, caused by ZO and the composite input
impedance (see Chapter “Characteristics”; row head “Input level adjustment control”) must be taken into account.
2. In order to prevent clipping at over-modulation (maximum deviation in the BTSC system for 100% modulation is
73 kHz).
3. For example colour bar or flat field white; 100% video modulation.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
COMPL+R(rms) composite input level for 100%
modulation L + R (25 kHz
deviation); RMS value;
fi = 300 Hz
measured at COMP
162
250
363
mV
∆COMP
composite input level
spreading under operating
conditions
Tamb = −20 to +70 °C; aging;
power supply influence
−0.5
+0.5
dB
Zsource
source impedance
note 1
low-ohmic 5
k
flf
low frequency roll-off
25 kHz deviation L + R;
−2dB −−
5Hz
fhf
high frequency roll-off
25 kHz deviation L + R;
−2 dB 100
−−
kHz
THDL,R
total harmonic distortion L + R
fi = 1 kHz; 25 kHz deviation
−−
0.5
%
fi = 1 kHz; 125 kHz deviation;
note 2
−−
1.5
%
S/N
signal-to-noise ratio
L + R/noise
CCIR 468-2 weighted quasi
peak; L + R; 25 kHz deviation;
fi = 1 kHz; 75 µs de-emphasis
critical picture modulation;
note 3
44
−−
dB
with sync only
54
−−
dB
α
SB
side band suppression mono
into unmodulated SAP carrier;
SAP carrier/side band
mono signal: 25 kHz deviation,
fi = 1 kHz; side band: SAP
carrier frequency
±1 kHz
40
−−
dB
α
SP
spectral spurious attenuation
L + R/spurious
50 Hz to 100 kHz;
mainly n
× fH; no de-emphasis;
L + R; 25 kHz deviation,
f = 1 kHz as reference
n = 1, 4, 5, 6
35
−−
dB
n = 2, 3
26
−−
dB


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