TDA9855WP Philips Semiconductors, TDA9855WP Datasheet - Page 12

• Manufacturer Part Number: TDA9855WP
• Description: I2C-bus controlled BTSC stereo/SAP decoder and audio processor
• Manufacturer: Philips Semiconductors

Philips Semiconductors
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 Z
2. In order to prevent clipping at over-modulation (maximum deviation in the BTSC system for 100% modulation is
1997 Nov 04
COMP
Z
f
f
THD
S/N
lf
hf
COMP
o
SB
SP
I
decoder and audio processor
SYMBOL
2
impedance (see Chapter “Characteristics”, Section INPUT LEVEL ADJUSTMENT CONTROL) must be taken into
account.
73 kHz).
C-bus controlled BTSC stereo/SAP
L,R
L+R(rms)
composite input level for 100%
modulation L + R;
25 kHz deviation;
f
composite input level
spreading under operating
conditions
output impedance
low frequency roll-off
high frequency roll-off
total harmonic distortion L + R
signal-to-noise ratio
L + R/noise
side band suppression mono
into unmodulated SAP carrier;
SAP carrier/side band
spectral spurious attenuation
L + R/spurious
i
= 300 Hz; RMS value
PARAMETER
measured at pin COMP
T
power supply influence
note 1
25 kHz deviation L + R; 2 dB
25 kHz deviation L + R; 2 dB
f
f
note 2
CCIR 468-2 weighted quasi
peak; L + R; 25 kHz deviation;
f
mono signal: 25 kHz deviation,
f
carrier frequency 1 kHz
50 Hz to 100 kHz;
mainly n
L + R; 25 kHz deviation,
f = 1 kHz as reference
i
i
i
i
amb
= 1 kHz; 25 kHz deviation
= 1 kHz; 125 kHz deviation;
= 1 kHz; 75 s de-emphasis
= 1 kHz; side band: SAP
critical picture modulation
with sync only
= 20 to +70 C; aging;
CONDITIONS
12
f
H
; no de-emphasis;
162
100
44
54
46
40
MIN.
0.5
o
and the composite input
250
low-ohmic 5
TYP.
Product specification
TDA9855
363
+0.5
5
0.5
1.5
MAX.
mV
dB
k
Hz
kHz
%
%
dB
dB
dB
dB
UNIT