Data Sheet

Page 89
nRF51822 Product Specification v3.1
11.4.3 QFAB QFN48 schematic with DC/DC converter setup
Figure 27 QFAB QFN48 with DC/DC converter setup
Note: For PCB reference layouts, see the Reference Layout section on the Downloads tab for the
different chip variants on www.nordicsemi.com.
C1
12pF
C2
12pF
C3
2.2nF
C4
1.0pF
C5
2.2pF
X1
16MHz
C9
1.0nF
C7
4.7μF
C8
100nF
C10
47nF
C11
100nF
AVDD
VCC_nRF
VCC_nRF P0.07
P0.30
P0.08 P0.09 P0.10 P0.11 P0.12 P0.13 P0.14 P0.15 P0.16
P0.17
P0.18
P0.19
P0.20
P0.21 P0.22 P0.23 P0.24 P0.25 P0.28 P0.29
P0.00
P0.01
P0.02
P0.03
P0.04
P0.06
SWCLK SWDIO
GND
L4
10μH
C12
1.0μF
L5
15nH
AVDD
P0.05
L1
4.7nH
L2
10nH
L3
3.3nH
C6
1.5pF
C14
12pF
C13
12pF
X2
32.768kHz
XL2 XL1
Optional
VDD
1
VDD
12
VSS
13
VDD_PA
30
ANT1
31
ANT2
32
VSS
33
VSS
34
AVDD
35
AVDD
36
XC1
37
XC2
38
nRF51x22
DCC
2
P0.30
3
P0.00
4
P0.01
5
P0.02
6
P0.03
7
P0.04
8
P0.05
9
P0.06
10
P0.07
11
P0.08
14
P0.09
15
P0.10
16
P0.11
17
DEC1
39
P0.21
40
P0.22
41
P0.23
42
P0.24
43
P0.25
44
P0.27
46
P0.26
45
P0.29
48
P0.28
47
P0.17
25
P0.18
26
P0.19
27
P0.20
28
DEC2
29
P0.12
18
P0.13
19
P0.14
20
P0.15
21
SWDIO/nRESET
23
SWDCLK
24
P0.16
22
U1
nRF51x22-QFAB