OSCILLATORS Electrical specification

32 MHz crystal oscillator (HFXO)


Symbol	Description	Min.	Typ.	Max.	Units
f_HFXO	External crystal frequency		32		MHz
f_{TOL_HFXO}	Frequency tolerance requirement for 2.4 GHz proprietary radio applications			±60	ppm
f_{TOL_HFXO_BLE}	Frequency tolerance requirement, Bluetooth Low Energy applications			±40	ppm
C_{L_HFXO}	Load capacitance	6		9	pF
P_{D_HFXO}	Drive level			100	µW
I_{STBY_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
I_{START_X32M_X2}	Average startup current during first 1ms for a given 2.0x1.6 mm crystal		0.36		mA
t_{POWERUP_X32M_X2}	Power-up time for a given 2.0x1.6 mm crystal, generating XOSTARTED event		200		µs
t_{POWERUP_X32M_TUNED_X2}	Power-up time for a given 2.0x1.6 mm crystal, generating XOTUNED event		300		µs
I_{STBY_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
I_{START_X32M_X3}	Average startup current during first 1ms for a given 1.2x1.0 mm crystal		0.38		mA
t_{POWERUP_X32M_X3}	Power-up time for a given 1.2x1.0 mm crystal, generating XOSTARTED event		415		µs
t_{POWERUP_X32M_TUNED_X3}	Power-up time for a given 1.2x1.0 mm crystal, generating XOTUNED event		700		µs


Symbol	Description	Min.	Typ.	Max.	Units
f_LFXO	External crystal frequency		32.768		kHz
f_{TOL_LFXO_BLE}	Frequency tolerance requirement, Bluetooth Low Energy applications			±500	ppm
f_{TOL_LFXO_ANT}	Frequency tolerance requirement for ANT applications			±50	ppm
C_{L_LFXO}	Load capacitance	6		9	pF
C_{0_LFXO}	Shunt capacitance		1.0	2.0	pF
R_{S_LFXO}	Equivalent series resistance		60	100	kΩ
P_{D_LFXO}	Drive level			0.5	μW
C_pin	Input capacitance on XL1 and XL2 pads with internal capacitor is disabled (INTCAP=0)		3		pF
V_{AMP,IN,XO,LOW}	Peak-to-peak amplitude for external low swing clock. Input signal must not swing outside supply rails.	100		500	mV