User's Manual

DOC No: ZB7-DTS-D02
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Copyright © JORJIN TECHNOLOGIES INC. 2016 18
http://WWW.JORJIN.COM.TW
CONFIDENTIAL
4.10. Internal 24-MHz Crystal Oscillator (XOSC_HF)
(1)
Tc = 25°C, VDDS = 3.0 V, unless otherwise noted.
Parameter
Test Conditions
Min
Typ
Max
Units
Crystal frequency
24
MHz
Crystal frequency tolerance
(2)
-40
+40
ppm
Start-up time
(3)
150
μs
(1) Probing or otherwise stopping the XTAL while the DC-DC converter is enabled may cause permanent damage to the
device.
(2) Includes initial tolerance of the crystal, drift over temperature, aging and frequency pulling due to incorrect load
capacitance. As per Bluetooth and IEEE 802.15.4 specification
(3) Kick-started based on a temperature and aging compensated RCOSC_HF using precharge injection
4.11. 32.768-kHz Crystal Oscillator (XOSC_LF)
Tc = 25°C, VDDS = 3.0 V, unless otherwise noted.
Parameter
Test Conditions
Min
Typ
Max
Units
Crystal frequency
32.768
KHz
Crystal frequency tolerance, Bluetooth low energy
applications
(1)
-500
500
ppm
(1) Includes initial tolerance of the crystal, drift over temperature, ageing and frequency pulling due to incorrect load
capacitance. As per Bluetooth and IEEE 802.15.4 specification.
4.12. 48-MHz RC Oscillator (RCOSC_HF)
Tc = 25°C, VDDS = 3.0 V, unless otherwise noted.
Parameter
Test Conditions
Min
Typ
Max
Units
Frequency
48
MHz
Uncalibrated frequency accuracy
±1
%
Calibrated frequency accuracy
(1)
±0.25
%
Start-up time
5
μs
(1) Accuracy relatively to the calibration source (XOSC_HF).