 English |
|
|
|
|
|
|
|
| STR720 Datasheet, PDF (384/401 Pages) STMicroelectronics – ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES | |||
| |||
| ◁ |
STR720 - ELECTRICAL CHARACTERISTICS
Table 97. Crystal oscillator recommanded characteristics
Symbol
Parameter
Conditions
Min
fOSCIN
fTOL
RD
CG, CD
Crystal Frequency
-
Crystal frequency tolerance
-30
Serial drain resistor
-
RD = 220 kâ¦
CL = 9 pF
Including board-stray capaci-
-
Recommended load capaci- tances
tors versus crystal load capac-
itance
RD = 220 kâ¦
CL = 12.5 pF
Including board-stray capaci-
-
tances
Value
Typ
32.678
-
220
15
22
Unit
Max
-
kHz
+30 ppm
-
kâ¦
-
pF
-
pF
The electrical characteristics of STR720 oscillator are reported in Table 98.
Table 98. Oscillator electrical characteristics
Symbol
Parameter
Test Conditions(1)
VDDRTC
gm
tSETUP
Vq
VOSC
ROSC
fOFFSET
Supply Voltage for PLL
Oscillator Transconductance
Oscillator Start-up Time (2)
Stable VDD
Operating point voltage
Output voltage amplitude(2)
Oscillation allowance(2)
CL = 12 pF, RD = 220 kâ¦
CL = 12 pF, RD = 220 kâ¦
Static frequency deviation (âF/
F)(2)
CL = 12 pF, RD = 220 kâ¦
Value
Unit
Min
Typ
Max
1.71
1.80
1.89
V
14
30
44
µA/V
400
500
1000
ms
-
956
-
mV
-
788
-
mV(rms)
500
-
-
kâ¦
-
+4.0
-
ppm
1. VDD(all) = 1.80 V ± 10%, VDD3(all) = 3.30 V ± 10%, TA = -40 / +85 °C unless otherwise specified.
2. Data based on design characterization done with AEL Crystal (N. 4065), not tested in production
384/401
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese