RDK-12GCONV
Reference Design Kit User Guide
Rev.0
PDS-061593
August 2017
31 of 44
Semtech
Proprietary & Confidential
www.semtech.com
Figure 5-3: GS12090 Schematic 1
Figure 5-4: GS12090 Schematic 2
J2
HIGH SPEED OUTPUTS
CONTROLLED 75R MICROSTRIP
CONTROLLED 75R MICROSTRIP
100R DIFF MICROSTRIP FROM U3 LENGTH MATCHED
CONTROLLED 100R DIFF
4.7UF
4.7UF
BNC
4.7UF
4.7UF
4.7UF
4.7UF
GS12090
75
470NF
4.7UF
120 OHM
VCC_A_2V5
100NF
100NF
VCCD_A_1V8
120 OHM
100NF
4.7UF
100NF
100NF
VCC_AUX_1V8
VCC_2V5
10UF
1UF
120 OHM
VCC_A_CORE_1V8
4.7UF
2
10UF
100NF
4.7UF
4.7UF
VCCD_A_1V8 VCC_A_CORE_1V8VCC_A_2V5
L13
L11
C37
U24
J2
C177
C178
C172
C175
C173
C80
R94
C46
C44
C169
C79
C45
C171
L16
C176
C154
C179
C218
C109
C48
C47
C143
C170
SDIO1
SDIO_1
RX1_P
TX3_P
TX3P
TX3_N
TX3N
RX1N
RX1_N
RX1P
GS12070_ISP1_N
MICRO_ISP1_N
GSPI_SD3
GSPI_SD4
VCC_2V5
GSPI_CSB0
GSPI_SCK
15
14
28
21
8
1
38
37
31
19
16
34
24
25
20
29
4
35
5
TAB
12
26
27
11
3
13
32
9
30
2
40
39
36
33
18
17
23
22
7
6
10
3 2
1
OUT
TAB/VEE_CORE
VEE_CORE_38
VCC_CORE_35
VEE_CORE_31
VCCO1P8_0
VEEO_28
VCCO_0
VCCO_1
VEEO_21
VCCO1P8_1
VEE_CORE_19
VDD
VSS_15
VSS_14
VEE_DDI_8
VCC_DDI
VEE_DDI_1
LF-
LF+
VEE_CORE_37
GPIO3
VCO_FILT
GPIO2
RSVD_32
LOOP_OUT
SDIO
SDON
DDOP
DDON
GPIO1
GPIO0
SCLK
SDOUT
SDIN
CS
RSVD_9
DDIP
DDIN
TERM
SDI_TERM
LOOP_IN
OUT
OUT
OUT
IN
IN
IN
OUT
IN
IN
CONTROLLED 75R MICROSTRIP
100R DIFF MICROSTRIP FROM U3 LENGTH MATCHED
CONTROLLED 100R DIFF
HIGH SPEED OUTPUTS
CONTROLLED 75R MICROSTRIP
4.7UF
4.7UF
BNC
75
4.7UF
4.7UF
4.7UF
4.7UF
GS12090
4.7UF
120 OHM
VCC_AUX_1V8
VCC_2V5
120 OHM
120 OHM
VCCD_B_1V8
VCC_B_CORE_1V8
4.7UF
100NF
10UF
1UF
VCC_B_2V5
4.7UF
100NF
100NF
100NF
100NF
2
10UF
100NF
4.7UF
4.7UF
VCCD_B_1V8 VCC_B_CORE_1V8VCC_B_2V5
470NF
C8
J3
R129
C190
C188
C219
R102
C185
C112
C54
C134
C144
C50
C111
C51
L19
U26
C191
C189
C53
C52
C180
C184
C122
C101
C110
L17
L18
SDIO2
SDIO_2
RX2_N
RX2P
RX2_P
RX2N
TX2_N
TX2N
TX2_P
TX2P
GS12070_ISP2_N
MICRO_ISP2_N
GSPI_SCK
GSPI_SD4
GSPI_SD5
GSPI_CSB0
3 2
1
15
14
28
21
8
1
38
37
31
19
16
34
24
25
20
29
4
35
5
TAB
12
26
27
11
3
13
32
9
30
2
40
39
36
33
18
17
23
22
7
6
10
OUT
OUT
TAB/VEE_CORE
VEE_CORE_38
VCC_CORE_35
VEE_CORE_31
VCCO1P8_0
VEEO_28
VCCO_0
VCCO_1
VEEO_21
VCCO1P8_1
VEE_CORE_19
VDD
VSS_15
VSS_14
VEE_DDI_8
VCC_DDI
VEE_DDI_1
LF-
LF+
VEE_CORE_37
GPIO3
VCO_FILT
GPIO2
RSVD_32
LOOP_OUT
SDIO
SDON
DDOP
DDON
GPIO1
GPIO0
SCLK
SDOUT
SDIN
CS
RSVD_9
DDIP
DDIN
TERM
SDI_TERM
LOOP_IN
OUT
OUT
IN
IN
IN
IN
IN
OUT