Symbol | Parameter | Min. | Typ. | Max. | Units |
---|---|---|---|---|---|
FXIN | XIN clock frequency | - | - | 24 | MHz |
DCXIN(1) | XIN clock duty cycle | 40 | 50 | 60 | % |
The following Table describes the characteristics for the oscillator when a crystal is connected between XIN and XOUT.
The user must choose a crystal oscillator where the crystal load capacitance CL is within the range given in the Table. The exact value of CL can be found in the crystal data sheet. The capacitance of the external capacitors (CLEXT) can then be computed as follows:
CLEXT = 2(CL - CPARA - CPCB - CSHUNT)
Where:
Symbol | Parameter | Conditions | Min. | Typ. | Max | Units |
---|---|---|---|---|---|---|
Fout | Crystal oscillator frequency | 0.4 | - | 32 | MHz | |
ESR(2) | Crystal Equivalent Series Resistance - SF = 3 | F = 0,4MHz - CL=100 pF XOSC,GAIN=0 | - | - | 5.6K | Ω |
F = 2MHz - CL=20 pF XOSC,GAIN=0, Cshunt=3.3pF | - | - | 330 | |||
F = 4MHz - CL=20 pF XOSC,GAIN=1, Cshunt=2.5pF | - | - | 240 | |||
F = 8MHz - CL=20 pF XOSC,GAIN=2, Cshunt=5.5pF | - | - | 105 | |||
F = 16MHz - CL=20 pF XOSC,GAIN=3, Cshunt=4pF | - | - | 60 | |||
F = 32MHz - CL=20 pF XOSC,GAIN=4, Cshunt=3.9pF | - | - | 55 | |||
Cxin(2) | Parasitic load capacitor | - | 6.7 | - | pF | |
Cxout(2) | - | 4.2 | - | pF | ||
Tstart(2) | Startup time | F = 2MHz - CL=20 pF XOSC,GAIN=0, Cshunt=3.3pF | - | 15.6K | 81.6K | Cycles |
F = 4MHz - CL=20 pF XOSC,GAIN=1, Cshunt=2.5pF | - | 6.3K | 25.2K | |||
F = 8MHz - CL=20 pF XOSC,GAIN=2, Cshunt=5.5pF | - | 6.2K | 27.2K | |||
F = 16MHz - CL=20 pF XOSC,GAIN=3, Cshunt=4pF | - | 7.7K | 27.3K | |||
F = 32MHz - CL=20 pF XOSC,GAIN=4, Cshunt=3.9pF | - | 6.0K | 21K | |||
CL(1) | Crystal load capacitance | 10 | - | 20 | pF | |
Pon(1) | Drive Level | AMPGC=ON | - | - | 100 | uW |
Symbol | Parameter | Conditions | Ta | Min. | Typ. | Max. | Units | |
---|---|---|---|---|---|---|---|---|
IDD | Current consumption | F=2MHz - CL=20pF XOSC,GAIN=0, VCC=3.3V | AMPGC=OFF | Max 85°C Typ 25°C |
- | 66 | 85 | µA |
AMPGC=ON | - | 62 | 99 | |||||
F=4MHz - CL=20pF XOSC,GAIN=1, VCC=3.3V | AMPGC=OFF | - | 107 | 140 | ||||
AMPGC=ON | - | 70 | 101 | |||||
F=8MHz - CL=20pF XOSC,GAIN=2, VCC=3.3V | AMPGC=OFF | - | 200 | 261 | ||||
AMPGC=ON | - | 118 | 153 | |||||
F=16MHz - CL=20pF XOSC,GAIN=3, VCC=3.3V | AMPGC=OFF | - | 436 | 581 | ||||
AMPGC=ON | - | 247 | 329 | |||||
F=32MHz - CL=20pF XOSC,GAIN=4, VCC=3.3V | AMPGC=OFF | - | 1303 | 1902 | ||||
AMPGC=ON | - | 627 | 940 |