DA14580
FINAL
Bluetooth Low Energy 4.2 SoC
Table 263: 32 kHz Crystal Oscillator: Recommended Operating Conditions
Parameter
Description
Conditions
Min
Typ
Max
Unit
V
(32K) external clock voltage
peak-peak voltage of
external clock at
0.1
0.2
1.5
V
CLK(EXT)
XTAL32Kp, pin
XTAL32Km floating.
note: XTAL32Kp is inter-
nally AC coupled
f
(32k)
crystal oscillator fre-
quency
frequency range for an
external clock
10
32.768
100
kHz
XTAL
(for a crystal, use either
32.000 kHz or 32.768
kHz)
ESR(32k)
C (32k)
equivalent series resis-
tance
100
9
k
load capacitance
no external capacitors
are required for a 6 pF or
7 pF crystal
6
7
1
pF
L
C (32k)
shunt capacitance
2
pF
0
f
(32k)
crystal frequency toler-
ance (including aging)
Timing accuracy is domi-
nated by crystal accu-
racy. A much smaller
value is preferred
-250
0.1
250
ppm
XTAL
P
(32k) maximum drive power
(Note 13)
W
DRV(MAX)
Note 13: Select a crystal that can handle a drive-level of at least this specification.
Table 264: 32 kHz Crystal Oscillator: Timing Characteristics
Parameter
Description
Conditions
Min
Typ
Max
Unit
t
(32k) crystal oscillator startup
time
Typical application, time
until 1000 clocks are
detected
0.4
s
STA(XTAL)
(Note 14)
Note 14: This parameter is very much dependent on crystal parameters
Table 265: DC-DC Converter: Recommended Operating Conditions
Parameter
Description
Conditions
Min
1.5
0.5
Typ
2.2
1
Max
3
Unit
H
L
effective inductance
C
(VDCDC) effective load capaci-
tance
VDCDC and VDDCRF
combined
10
F
OUT
(Note 15)
C
(VBAT3V) effective load capaci-
tance
VBATRF and VBAT3V
combined are the sec-
ond output of the boost-
converter
0.5
1
10
F
OUT
(Note 15)
Note 15: A low value will result in lowest power consumption, keep this value at 1 uF or 2 uF.
Table 266: DC-DC Converter: DC Characteristics
Parameter
Description
Conditions
Min
Typ
Max
Unit
V (BUCK)
output voltage
default settings
1.41
V
O
Datasheet
Revision 3.4
09-Nov-2016
CFR0011-120-01
145 of 155
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