RF2053
Evaluation Board Schematic
Narrowband with UMX-236-D16 VCO
50 strip
J7
LO_OP
R21
CB2
CB4
12
11
10
9
13
14
15
16
17
18
19
20
21
22
23
24
SLD
USB
VCC
PU2
PU1
CB3
18R
UMX-236-D16
VCO
16 15 14 13
22 pF
C41
R18
0R
12
2
11
1
R22
18R
R23
18R
T5
R7
10 K
50 strip
50 strip
50 Strip
TC1-1-13M
VDD_VCO
INDP
INDN
C38
10 nF
C39
22 pF
R24
DNI
R25
DNI
3
10
9
DSR#
8
C42
22 pF
4
R2
1K
7
VDD
5
6
7
8
17
V Tune
6
C30
3.3 nF
5
RST#
VCC
UIO
4
3
CB1
CB0
VDDA
2
C1
33 pF
C6
22 pF
C29
100 nF
1
Socket for USB
Interface
RESETB
L1
DNI
R8
DNI
C21
100 pF
R14
0 R
T1
50 strip
1
3
2
RESETB
ENX
J1
RF OP
4
C15
33 pF
C14
33 pF
C13
33 pF
C25
DNI
C20
100 pF
TC4-19+
5
6
SCLK
SDATA
ENBL
ENX
SCLK
7
8
SDATA
ENBL
C24
9
10
12
14
16
18
20
22
24
R15
0 R
R3
100 k
100 pF
C35
33 pF
50 strip
J2
RF IP
VDD
VDD
11
13
15
17
19
21
23
VDDA
C12
10 uF
C31
DNI
VDDD
C11
10 uF
32 31 30 29 28 27 26 25
T2
C23
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
100 pF
+V_OP
VDDA
INDP
VDDA
MODE
TC1-1-13M
R1
51 k
INDN
-V_OP
C34
10 nF
C2
33 pF
C18
10 nF
Active Loop Filter
C8
C10
100 nF
VDD_VCO
10 nF
C3
VDDD
33 pF
C43
10 nF
HDR_2X12
C5
LFILT1
33 pF
C19
10 nF
C16
R9
+V_OP
1.5 nF
1K5
C9
100 nF
C26
33 nF
9
10 11 12 13 14 15 16
FILT1
TP4
R11
1K
VTUNE
MODE
TP5
R6
6.8K
U1
OPA27
Note: For the UMX-236-D16 VCO
VDD_VCO is +5VDC
+V_OP is +5VDC
C36
33 pF
C27
3.3 nF
+1.2V
+V_OP
C28
100 nF
R10
2.2K
C16
DNI
-V_OP is -5VDC
C4
10 nF
-V_OP
26 MHz XTAL
J6
REF
C7
DNI
C22
DNI
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
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