Philips TDA2549 User Manual
Page 5
April 1985
5
Philips Semiconductors
Product specification
I.F. amplifier and demodulator for
multistandard TV receivers
TDA2549
Notes to the characteristics
1.
2. Measured in application of Fig. 5.
A.F.C. output voltage swing
V
15-3
10
−
−
V
Change of frequency required for a.f.c.
output voltage swing of 10 V
∆
f
−
70
200
kHz
A.F.C. switch off for a voltage lower than:
V
17-3
−
−
1,5
V
A.F.C. inverter switch
positive a.f.c. (Fig.2)
V
16-3
0
−
1,5
V
negative a.f.c. (Fig.3)
V
16-3
4
−
12
V
Tuner A.G.C.
Leakage current
I
10
−
−
15
µ
A
Saturation voltage
I
10
= 0,3 mA
V
10-3
−
0,1
0,3
V
take-over point LOW
V
i
−
−
3
mV
take-over point HIGH
V
i
10
−
−
mV
Signal expansion at G
v
= 50 dB
∆
V
22-3
−
−
0,5
dB
Negative modulation (Fig.4)
white spot inverter threshold level
V
22-3
−
4,6
−
V
white spot insertion level
V
22-3
−
3,2
−
V
noise inverter threshold level
V
22-3
−
0,9
−
V
noise insertion level
V
22-3
−
2,5
−
V
Positive modulation a.g.c. detector
reference level
V
11-3
3,0
3,2
3,4
V
Auxiliary video input signal for V
o(p-p)
= 2 V
V
12-3
0,7
1
1,4
V
Auxiliary video output
output signal (note 2)
V
14-3
−
1
−
V
top sync level
V
14-3
1
2
3
V
output impedance
|Z
14-3
|
−
7
−
Ω
Levels for video switches
positive video
V
2-3
−
−
1
V
negative video
V
2-3
3
−
−
V
internally demodulated signal
V
23-3
−
−
1
V
auxiliary video signal
V
23-3
3
−
−
V
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
Signal
to
–
noise ratio S/N
–
V
o
black-to-white
V
n rms
(
)
at B
5 MHz
=
-----------------------------------------------------------
=