NXP Semiconductors
TDA5051A
Home automation modem
Calculation of parameters depending on the clock frequency
…continued
Parameter
AGC time constant
demodulation set-up time
demodulation hold time
Conditions
2514/f
osc
3200/f
osc
(max.)
3800/f
osc
(≈max.)
Unit
s
s
s
s
minimum burst time of V
O(DC)
signal t
W(DI)(min)
+ t
h
Table 7.
Symbol
t
W(burst)(min)
t
c(AGC)
t
su(demod)
t
h(demod)
TX_OUT
t
W(burst)(min)
t
W(burst)
V
O(DC)
t
su
0
t
h
DATA_IN
t
W(DI)
t
W(DI)(min)
(1)
(2)
(3)
002aaf044
(1) t
W(DI)
> t
W(DI)(min)
(2) t
W(DI)(min)
= t
su
+ 1/f
cr
(3) t
W(DI)(min)
< t
su
; wrong operation
Fig 8.
Relationship between DATA_IN and TX_OUT (see
Table 8)
Table 8.
Relationship between DATA_IN and TX_OUT
X = don’t care.
PD
1
0
0
DATA_IN
X
1
0
TX_OUT
high-impedance
high-impedance (after t
h
)
active with DC offset
t
W(burst)
t
su
100 %
t
h
002aaf045
Fig 9.
Pulse shape characteristics
TDA5051A
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 5 — 13 January 2011
12 of 29
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