TDA9852 Ver la hoja de datos (PDF) - Philips Electronics
Número de pieza
componentes Descripción
Lista de partido
TDA9852 Datasheet PDF : 40 Pages
| |||
Philips Semiconductors
I2C-bus controlled BTSC stereo/SAP
decoder and audio processor
Preliminary specification
TDA9852
Requirements for the composite input signal to ensure correct system performance
SYMBOL
PARAMETER
COMPL+R(rms)
composite input level for 100%
modulation L + R; 25 kHz
deviation; fi = 300 Hz;
RMS value
∆COMP
composite input level
spreading under operating
conditions
Zo
flf
fhf
THDL,R
output impedance
low frequency roll-off
high frequency roll-off
total harmonic distortion L + R
S/N
signal-to-noise ratio
L + R/noise
αSB
side band suppression mono
into unmodulated SAP carrier;
SAP carrier/side band
αSP
spectral spurious attenuation
L + R/spurious
CONDITIONS
measured at COMP
MIN.
162
Tamb = −20 to +70 °C; aging; −0.5
power supply influence
note 1
−
25 kHz deviation L + R; −2 dB −
25 kHz deviation L + R; −2 dB 100
fi = 1 kHz; 25 kHz deviation −
fi = 1 kHz; 125 kHz deviation; −
note 2
CCIR 468-2 weighted quasi
peak; L + R; 25 kHz deviation;
fi = 1 kHz; 75 µs de-emphasis
critical picture modulation; 44
note 3
with sync only
54
mono signal: 25 kHz deviation, 46
fi = 1 kHz; side band: SAP
carrier frequency ±1 kHz
50 Hz to 100 kHz;
mainly n × fH; no de-emphasis;
L + R; 25 kHz deviation,
f = 1 kHz as reference
n = 1, 5
35
n = 4, 6
40
n = 2, 3
26
TYP.
250
MAX.
363
−
+0.5
low-ohmic 5
−
5
−
−
−
0.5
−
1.5
−
−
−
−
−
−
−
−
−
−
−
−
UNIT
mV
dB
kΩ
Hz
kHz
%
%
dB
dB
dB
dB
dB
dB
Notes
1. Low-ohmic preferred, otherwise the signal loss and spreading at COMP, caused by Zo and the composite input
impedance (see Chapter “Characteristics”, Section “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.
1997 Mar 11
11
Share Link: 