User Manual

Jennic
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Jennic
© Jennic 2008 JN-DS-JN5139 v1.5 55
17.3.5 32kHz Oscillator
VDD = 2.2 to 3.6V, -40 to +85 ºC
Parameter Min Typ Max Unit Notes
Current consumption of cell
and counter logic
1.2
1.0
0.8
µA 3.6V
3.0V
2.2V
32kHz clock native
accuracy
-30% 32kHz +30%
At 3.0V 25 ° C
Calibrated 32kHz accuracy ±330 ppm For a 1 second sleep
period calibrating over
100 x 32kHz clock
periods
Variation with temperature +0.008 %/°C
Variation with VDD2 -5 %/V
17.3.6 16MHz Crystal Oscillator
VDD = 2.2 to 3.6V, -40 to +85ºC
Parameter Min Typ Max Unit Notes
Current consumption 80 215 350 µA Including bandgap ref.
Start – up time 2.5 ms Assuming xtal with ESR of
40ohms and CL= 9pF
External caps = 15pF
(150mV pk-pk) see
Appendix B
Input capacitance 1.4 pF Bondpad and package,
guaranteed by design
Transconductance 1.05 1.3 1.7 mA/V
DC voltages, XTALIN,
XTALOUT
300 390 480 mV
External Capacitors 15 pF Total external capacitance
needs to be 2*CL, allowing
for stray capacitance from
chip, package and PCB