OSCILLATORS Electrical specification
32 MHz crystal oscillator (HFXO)
| Symbol | Description | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|
| fHFXO | External crystal frequency | 32 | MHz | ||
| fTOL_HFXO | Frequency tolerance requirement for 2.4 GHz proprietary radio applications | ±60 | ppm | ||
| fTOL_HFXO_BLE | Frequency tolerance requirement, Bluetooth Low Energy applications | ±40 | ppm | ||
| CL_HFXO | Load capacitance | 6 | 9 | pF | |
| PD_HFXO | Drive level | 100 | µW | ||
| CPIN_HFXO | Input capacitance on XC1 and XC2 pins with internal capacitor disabled (INTCAP=0) | 3.1 | pF | ||
| ISTBY_X32M_X2 | Core standby current for a given 2.0x1.6 mm crystal: CL_HFXO=8 pF C0_HFXO=0.74 pF LM_HFXO=9.4 mH RS_HFXO=35 Ω | 34 | µA | ||
| ISTART_X32M_X2 | Average startup current during first 1ms for a given 2.0x1.6 mm crystal | 0.36 | mA | ||
| tPOWERUP_X32M_X2 | Power-up time for a given 2.0x1.6 mm crystal, generating XOSTARTED event | 200 | µs | ||
| tPOWERUP_X32M_TUNED_X2 | Power-up time for a given 2.0x1.6 mm crystal, generating XOTUNED event | 300 | µs | ||
| ISTBY_X32M_X3 | Core standby current for a given 1.2x1.0 mm crystal: CL_HFXO=8 pF C0_HFXO=0.42 pF LM_HFXO=22.7 mH RS_HFXO=100 Ω | 63 | µA | ||
| ISTART_X32M_X3 | Average startup current during first 1ms for a given 1.2x1.0 mm crystal | 0.38 | mA | ||
| tPOWERUP_X32M_X3 | Power-up time for a given 1.2x1.0 mm crystal, generating XOSTARTED event | 415 | µs | ||
| tPOWERUP_X32M_TUNED_X3 | Power-up time for a given 1.2x1.0 mm crystal, generating XOTUNED event | 700 | µs |
32.768 kHz crystal oscillator (LFXO)
| Symbol | Description | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|
| fLFXO | External crystal frequency | 32.768 | kHz | ||
| fTOL_LFXO_BLE | Frequency tolerance requirement, Bluetooth Low Energy applications | ±500 | ppm | ||
| fTOL_LFXO_ANT | Frequency tolerance requirement for ANT applications | ±50 | ppm | ||
| CL_LFXO | Load capacitance | 6 | 9 | pF | |
| C0_LFXO | Shunt capacitance | 1.0 | 2.0 | pF | |
| RS_LFXO | Equivalent series resistance | 100 | kΩ | ||
| PD_LFXO | Drive level | 0.5 | μW | ||
| Cpin | Input capacitance on XL1 and XL2 pins with internal capacitor disabled (INTCAP=0) | 3 | pF | ||
| VAMP,IN,XO,LOW | Peak-to-peak amplitude for external low swing clock. Input signal must not swing outside supply rails. | 100 | 500 | mV |