TDA7580_07 Datasheet, PDF (16/39 Pages) STMicroelectronics – FM/AM digital IF sampling processor

Block diagram and electrical specifications
TDA7580
Note:
Table 10.
Symbol
Oscillator characteristics
(T_j =-40°C to 125°C; V_DD =1.7V to 1.9V, V_DD3 = 3.15V to 3.45V)
Parameter
Test condition
Min. Typ. Max. Unit
F_OSCFM Oscillator frequency (XTI/XTO)
74.1
MHz
The accuracy depends on the quartz frequency precision: high stability oscillator
Table 11. Crystal characteristics for 1 and 2 chip load
Parameter name
Parameter value
1 chip load
2 chips load
Temperature range
-55°C÷125°C
-55°C÷125°C
Adjustment tolerance (@ 25°C ± 3°C)
± 30 ppm
± 30 ppm
Frequency stability (-20°C÷+70°C)
± 50 ppm
± 50 ppm
Aging @ 25°C
5 ppm/year
5 ppm/year
Shunt (static) capacitance [Co]
<5pF
<5pF
Motional capacitance
1fF ± 30%
1fF ± 30%
Mode of oscillation
AT-3rd
AT-3rd
Resonance resistance
< 75 ohm
< 45 ohm
Capacitive load for oscillation frequency =
74.1MHz
10pF
12pF
Table 12. External clock signal on XTI (In case the device is driven by an external clock
through the XTI pin, the characteristics reported in this table have to be met)
Parameter name
Parameter value
Min
Typ
Max
Unit
Clock frequency
74.10
MHz
Frequency stability (-20°C÷+70°C)
-50
50
ppm
Clock jitter
Start up time
Clock level (sine wave) ⁽¹⁾
220
Clock level (square wave) ⁽¹⁾
0.50
10
5
640
1.80
ps _rms
ms
mV rms
V p-p
Clock duty cycle (square wave)
45
Clock rise / fall time (square wave) ⁽¹⁾
55
%
500
ps
1. specified @ XTI pin of TDA7580
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