參數(shù)資料
型號(hào)： TDA8046H
廠商： NXP SEMICONDUCTORS
元件分類： 消費(fèi)家電
英文描述： Multi-mode QAM demodulator
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP64
文件頁數(shù)： 36/48頁
文件大?。?/td> 245K
代理商： TDA8046H
1996 Nov 19
36
Philips Semiconductors
Product specification
Multi-mode QAM demodulator
TDA8046
8
In accordance with the Absolute Maximum Rating System (IEC 134).
LIMITING VALUES
9
THERMAL CHARACTERISTICS
10 DEMODULATOR AND HALF NYQUIST FILTER CHARACTERISTICS
Note
1.
Definition of the power inter-symbol interference:
Where N
conv
is the number of coefficients C
conv
. C
conv
(k) represent the coefficient resulting from the convolution of
the transmission and reception filters (K indicates the K
th
coefficient).
The power ISI specified in Table 1 has been calculated on a filter resulting from the convolution of the TDA8046 filters
and a truncated half-Nyquist filter with 57 T/4 taps for the 15% roll-off filter and 41 T/4 taps for the 20% roll-of filter
(see “Application note AN96048” - Appendix B).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
DDD
V
max
P
tot
T
stg
T
amb
digital supply voltage
maximum voltage on all pins
total power dissipation
storage temperature
operating ambient temperature
0.3
0
55
0
6.0
V
DDD
1.4
+150
70
V
V
W
°
C
°
C
T
amb
= 70
°
C
SYMBOL
PARAMETER
CONDITIONS
VALUE
UNIT
R
th j-a
thermal resistance from junction to ambient
in free air
50
K/W
SYMBOL
α
PARAMETER
CONDITIONS
MIN.
TYP.
15 or 20
0.05
MAX.
UNIT
roll-off
pass-band ripple
stop-band ripple
power inter-symbol interference (15% roll-off filter) note 1
power inter-symbol interference (20% roll-off filter) note 1
see Figs 5 and 6
%
dB
ISI
power
43
44
dB
dB
ISI
power
dB
(
)
10 log
2
--------------------------------------------------------------------
C
conv
(4k)
2
C
conv
(0)
N
conv
1
–
(
)
2
∑
×
=
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