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NRF51822-CFAC-R7 数据表(PDF) 43 Page - Nordic Semiconductor

部件名 NRF51822-CFAC-R7
功能描述  Multiprotocol Bluetooth® low energy/2.4 GHz RF System on Chip
PDF  130 Pages
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制造商  NORDIC [Nordic Semiconductor]
网页  https://www.nordicsemi.com/
标志 NORDIC - Nordic Semiconductor

NRF51822-CFAC-R7 数据表(HTML) 43 Page - Nordic Semiconductor

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Page 43
nRF51822 Product Specification v3.3
8.1.4
16 MHz RC oscillator (16M RCOSC)
Table 24 16 MHz RC oscillator
8.1.5
32.768 kHz crystal oscillator (32k XOSC)
Table 25 32.768 kHz crystal oscillator
Symbol
Description
Min.
Typ.
Max.
Units
Test
level
fNOM,RC16M
Nominal frequency.
16
MHz
N/A
fTOL,RC16M
Frequency tolerance.
±1
±5
%
3
IRC16M
Run current for 16 MHz RC oscillator.
7501
1. This number includes the current used by the automated power and clock management system.
μA
1
IRC16M,1M
Run current for 16 MHz RCOSC when used only for a
Timer at 1 MHz or less.
5401
μA
1
tSTART,RC16M
Startup time for 16 MHz RC oscillator.
4.2
5.2
μs
1
IRC16M, START
Startup current for 16 MHz RC oscillator.
400
μA
1
Symbol
Description
Min.
Typ.
Max.
Units
Test
level
fNOM,X32k
Crystal frequency.
32.768
kHz
N/A
fTOL,X32k,BLE
Frequency tolerance, Bluetooth low energy
applications.
±250
ppm
N/A
CL,X32k
Load capacitance.
12.5
pF
N/A
C0,X32k
Shunt capacitance.
2
pF
N/A
RS,X32k
Equivalent series resistance.
50
80
kΩ
N/A
PD,X32k
Drive level.
1
μW
N/A
Cpin
Input capacitance on XL1 and XL2 pads.
4
pF
1
IX32k
Run current for 32.768 kHz crystal oscillator.
0.7
μA
1
ISTART,X32k
Startup current for 32.768 kHz crystal oscillator.
1.3
1.8
μA
1
tSTART,X32k
Startup time for 32.768 kHz crystal oscillator.
0.3
1
s
2
VINEXTCLK
Input amplitude if driven by external clock applied to
XL1 pin.1
1. Leave XL2 pin unconnected.
200
6002,3
2. The oscillator run current will increase above 1 μA for higher amplitudes.
3. Input signal must not swing outside supply rails.
mV pp
1



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