TDA9850 Ver la hoja de datos (PDF) - Philips Electronics
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TDA9850 Datasheet PDF : 32 Pages
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Philips Semiconductors
I2C-bus controlled BTSC stereo/SAP decoder
Preliminary specification
TDA9850
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. UNIT
SAP output
Zo
output impedance
−
VO
DC output voltage
−
RL
output load resistance
5
(AC-coupled)
CL
Vo(rms)
output load capacitance
−
nominal output voltage
(RMS value)
150 µs de-emphasis
80
120
Ω
0.5VCC−1.5 −
V
−
−
kΩ
−
2.5
nF
see Fig.3
Outputs OUTL and OUTR
Vo(rms)
nominal output voltage
(RMS value)
HEADo
Zo
VO
RL
output headroom
output impedance
DC output voltage
output load resistance
(AC-coupled)
CL
output load capacitance
αct
crosstalk L, R into SAP
crosstalk SAP into L, R
∆VST-SAP
output voltage difference
if switched from L, R to
SAP
100% modulation
100% modulation;
fi = 1 kHz; L or R;
mode selector switched
to SAP/SAP
100% modulation;
fi = 1 kHz; SAP;
mode selector switched
to stereo
250 Hz to 6.3 kHz
−
500
−
mV
9
−
−
dB
−
80
120
Ω
0.45VCC−1.5 0.5VCC−1.5 0.55VCC−1.5 V
5
−
−
kΩ
−
−
2.5
nF
50
75
−
dB
50
70
−
dB
−
−
3
dB
Dbx noise reduction circuit
tadj
stereo adjustment time see Section “Adjustment −
procedure”
Is
∆Is
Is range
It
nominal timing current for Is can be measured at pin −
nominal release rate of CTS via current meter
spectral RMS detector connected to
1⁄2VCC + 0.25 V
spread of timing current
−15
timing current range
7 steps via I2C-bus
−
timing current for release
−
rate of wideband RMS
detector
Relrate
nominal RMS detector
release rate
wideband
nominal timing current
and external capacitor
values
−
spectral
−
−
1
24
−
−
+15
±30
−
1⁄3Is
−
125
−
381
−
s
µA
%
%
µA
dB/s
dB/s
1995 Jun 19
13
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