RF64 Datasheet, PDF (74/76 Pages) List of Unclassifed Manufacturers – ADVANCED COMMUNICATIONS & SENSING

ADVANCED COMMUNICATIONS & SENSING
The layers description is illustrated in Figure 57:
Signal (35um)
Isolation (FR4, 1.6mm)
Ground plane
Figure 57: Reference Design‘s Stackup
The layout itself is illustrated in Figure 58.
19mm
9mm
RF64
Figure 58: Reference Design Layout (top view)
7.5.3. Bill Of Material
Table 35: Reference Design BOM
Ref
Value
Tol (+/-)
Techno
Size
Comment
315MHz 434MHz
U1
RF64
-
Transceiver IC TQFN-32 -
U2
315MHz 434 MHz -
SAW Filter
3.8*3.8 mm Plotted in section 7.5.4
Q1
12.8 MHz
15 ppm at 25°C
AT-cut
5.0*3.2 mm Fundamental, Cload=15 pF
20 ppm over -40/+85°C
2ppm/year max
R1
1Ω
1%
-
0402
PA regulator
R2
6.8K
1%
-
0402
Loop filter
C1
1µ F
15%
X5R
0402
VDD decoupling
C2
100 N F
15%
X5R
0402
Top regulator decoupling
C3
100 N F
10%
X7R
0402
Digital regulator decoupling
C4
47 NF
10%
X7R
0402
PA regulator decoupling
C5
100 N F
10%
X7R
0402
VCO regulator decoupling
C6
6.8N F
10%
X7R
0402
Loop Filter
C7
680P
5%
NPO
0402
Loop Filter
C8
10 P
0.25 pF
NPO
0402
Matching
C9
150 PF
5%
NPO
0402
DC block and L4 adjust
L1, L2
33NH 19NH
0.2 nH
Wire wound
0402
VCO tank inductors
L3
19NH
5%
Wire wound
0402
PA Choke
L4
2 7 NH
5%
Multilayer
0402
Matching
C10, C11
NC
-
-
0402
-
C12*
47 P
5%
NPO
0402
DC block
*Not part of the ref. design (not required for direct antenna connection).
Note: for battery powered applications, a high value capacitance should be implemented in parallel with C1
(typically 10 µF) to offer a low impedance voltage source during startup sequences.
Page 74 of 76
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