|
TDA8295 Datasheet, PDF (53/77 Pages) NXP Semiconductors – Digital global standard low IF demodulator for analog TV and FM radio | |||
|
◁ |
NXP Semiconductors
TDA8295
Digital global standard low IF demodulator for analog TV and FM radio
Table 68. Characteristics â¦continued
Power supplies 3.3 V, 1.2 V; Tamb = 25 °C; PC / SC1 for L and M = 10 dB, all others 13 dB; residual picture carrier for L = 3 %,
all others 10 %; FM/AM modulation = 54 %, 1 kHz modulation frequency; measured in application PCB (see Figure 12) with
16 MHz crystal frequency, loaded with 75 ⦠(CVBS) and 1 k⦠(SSIF/audio). Values are meant for âeasy programmingâ
settings (recommended) except internal mono audio and IF demodulation. The low IF spectrum is delivered by a professional
downconverter.
Symbol
Parameter
Conditions
Min
Typ
Max Unit
IF input
Vi(p-p)
peak-to-peak input voltage for full-scale ADC input
(0 dBFS)
1.8
2.0
2.2 V
Ri(dif)
Ci(dif)
Vi
differential input resistance
10
differential input capacitance
-
input voltage
operational input related to
â3
ADC full scale; all standards;
sum of all signals
15
-
kâ¦
2
3 pF
â3
â3 dBFS
fi
input frequency
PC / SC1
M/N standard
-
5.75 / 1.25 - MHz
B standard
-
6.75 / 1.25 - MHz
G/H standard
-
7.75 / 2.25 - MHz
I standard
-
7.75 / 1.75 - MHz
DK and L standard
-
7.75 / 1.25 - MHz
L-accent standard
-
1.25 / 7.75 - MHz
FM radio
-
1.25
- MHz
IF selectivity
αsup(stpb)
stop-band suppression
Hilbert ï¬lter stop-band
â60
-
- dB
decimation ï¬lter stop-band
â40
-
- dB
notch for NSC (NPC for
[4] â40
-
- dB
L-accent standard)
Carrier recovery FPLL
Bâ3dB(cl)
closed-loop â3 dB
bandwidth
ultrawide
superwide
280
280
280 kHz
130
130
130 kHz
wide
60
60
60 kHz
medium
30
30
30 kHz
narrow
15
15
15 kHz
âfpullin
mover(PC)
pull-in frequency range
picture carrier
overmodulation index
black for L/L-accent standard;
ï¬at ï¬eld white else
[5] ±830
115
±830
117
±830 kHz
-%
fstep(AFC)
AFC step frequency
128 steps
IF demodulation (video equalizer in Flat mode)
[5] 13
-
- kHz
BT(tot)
total transition bandwidth Nyquist ï¬lter; all standards
1
αsup(stpb)
stop-band suppression
Nyquist ï¬lter; all standards
â60
video low-pass ï¬lter (M/N,
-
B/G/H, I, D/K, L/L-accent
standard)
1
1 MHz
-
- dB
â60
- dB
TDA8295_1
Product data sheet
Rev. 01 â 4 February 2008
© NXP B.V. 2008. All rights reserved.
53 of 77
|
▷ |