Philips TDA5051A User Manual
1999 May 31
11
Philips Semiconductors
Product specification
Home automation modem
TDA5051A
Table 1
Clock oscillator parameters
Table 2
Calculation of parameters depending on the clock frequency
OSCILLATOR
FREQUENCY
f
osc
CARRIER FREQUENCY
f
cr
CLOCK OUTPUT
FREQUENCY
1
⁄
2
f
osc
EXTERNAL COMPONENTS
6.080 to 9.504 MHz
95 to 148.5 kHz
3.040 to 4.752 MHz
C1 = C2 = 27 to 47 pF;
R
R
p
= 2.2 to 4.7 M
Ω
;
XTAL = standard quartz crystal
SYMBOL
PARAMETER
CONDITIONS
UNIT
f
osc
oscillator frequency
with on-chip oscillator: frequency of the crystal
quartz; with external clock: frequency of the
signal applied at OSC1
quartz; with external clock: frequency of the
signal applied at OSC1
Hz
f
CLKOUT
clock output frequency
1
⁄
2
f
osc
Hz
f
cr
carrier frequency/digital filter tuning
frequency
frequency
1
⁄
64
f
osc
Hz
t
su
set-up time of the shaped burst
or
s
t
h
hold time of the shaped burst
or
s
t
W(DI)(min)
minimum pulse width of DATA
IN
signal
t
su
+
s
t
W(burst)(min)
minimum burst time of V
O(DC)
signal
t
W(DI)(min)
+ t
h
s
t
c(AGC)
AGC time constant
s
t
su(demod)
demodulation set-up time
(
≈
max.)
s
t
h(demod)
demodulation hold time
(
≈
max.)
s
23
f
cr
------
1472
f
osc
-------------
23
f
cr
------
1472
f
osc
-------------
1
f
cr
-----
2514
f
osc
-------------
3200
f
osc
-------------
3800
f
osc
-------------