Data Sheet

1090
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
Table A-37. Crystal Oscillator Characteristics (Device Variant B)
Symbol Parameter Conditions Min. Typ. Max. Units
f
OUT
Crystal oscillator frequency
I
0.4 - 32 MHz
ESR
Crystal Equivalent Series
Resistance
Safety Factor = 3
The AGC doesn t have any
noticeable impact on these
measurements.
f = 0.455MHz, C
L
= 100pF
XOSC.GAIN = 0
- - 5.6K
Ω
f = 2MHz, C
L
= 20pF
XOSC.GAIN = 0
- - 416
f = 4MHz, C
L
= 20pF
XOSC.GAIN = 1
- - 243
f = 8MHz, C
L
= 20pF
XOSC.GAIN = 2
- - 138
f = 16MHz, C
L
= 20pF
XOSC.GAIN = 3
- - 66
f = 32MHz, C
L
= 18pF
XOSC.GAIN = 4
- - 56
C
XIN
Parasitic capacitor load
I
- 5.9 - pF
C
XOUT
Parasitic capacitor load - 3.2 - pF
I
XOSC
Current Consumption
f = 2MHz, C
L
= 20pF, AGC off 65 90
µA
f = 2MHz, C
L
= 20pF, AGC on 52 79
f = 4MHz, C
L
= 20pF, AGC off 117 160
f = 4MHz, C
L
= 20pF, AGC on 74 110
f = 8MHz, C
L
= 20pF, AGC off 226 319
f = 8MHz, C
L
= 20pF, AGC on 128 193
f = 16MHz, C
L
= 20pF, AGC off 502 741
f = 16MHz, C
L
= 20pF, AGC on 307 626
f = 32MHz, C
L
= 18pF, AGC off 1622 2344
f = 32MHz, C
L
= 18pF, AGC on 615 1400
t
STARTUP
Startup time
f = 2MHz, C
L
= 20pF,
XOSC.GAIN = 0, ESR = 600Ω
- 14K 48K
cycles
f = 4MHz, C
L
= 20pF,
XOSC.GAIN = 1, ESR = 100Ω
- 6800 19.5K
f = 8MHz, C
L
= 20pF,
XOSC.GAIN = 2, ESR = 35Ω
- 5550 13K
f = 16MHz, C
L
= 20pF,
XOSC.GAIN = 3, ESR = 25Ω
- 6750 14.5K
f = 32MHz, C
L
= 18pF,
XOSC.GAIN = 4, ESR = 40Ω
- 5.3K 9.6K