EB-GS2993
Evaluation Board User Guide
55092 - 0
April 2010
7 of 10
1.6 LED Indicator
D3 is the Carrier Detect LED for the GS2993. D3 is on when no carrier is detected and
stays off otherwise. There is one LED_EN jumper which when disconnected, it disables
the LED. This is useful when measuring system power dissipation.
2. Schematic
Figure 2-1:
GS
2993
S
chematic
5
6
7
8
4
3
2
1
15
16
2
12
19
1
TAB
9
3
4
10
11
21
20
5
14
13
18
17
22
8
7
6
OP2_EN_93
BYPASS_93
OP1_EN_93
BYPASS_93
CDB_93
24
23
VCC_DIG_93 - DIGITAL SUPPLY
POWER SUPPLIES
LED ENABLE JUMPER
VCC_O2_93 - OUTPUT 2 SUPPLY
VCC_A_93 - INPUT SUPPLY
AUTOSLEEP
POWER SUPPLIES
VCC_O1_93 - OUTPUT 1 SUPPLY
VCC_LED_93 - LED SUPPLY SEPARATED FROM INPUT SUPPLY BY HEADER
10μF
100nF
10μF
100nF
VCC_O2_93
VCC_O1_93
100nF
37.4
VCC_A_93
4.7μF
SMA
SWDIP4
VCC_DIG_93
221
VCC_DIG_93
VCC_O1_93
TBD
WHITE
10nF
WHITE
SMA
100
BLACK
VCC_A_93
RED
WHITE
470nF
VCC_A_93
SMA
10nF
1μF
10NF
1μF
10nF
VCC_A_93
10nF
VCC_O2_93
SMA
4.7μF
MMBT3904
VCC_A_93
75
4.7μF
VCC_A_93
RED
14k
4.7μF
365
YELLOW
1.21K
GS2993
75
6.2nH
BNC
TBD
5.0K
YELLOW
5.0K
10nF
WHITE
5.0K
R11
R
10
R33
D3
R34
Q6
R31
C17
TP7
TP8
C34
C32
C31
C33
TP11
TP10
JP9
JP8
JP10
C35
C36
TP13
TP12
SW2
C23
C24
C25
R30
R32
R23
TP9
C18
C29
J8
C28
J7
J5
J6
C26
C27
C19
C20
R18
L4
R16
R17
L3
R15
J4
C21
U1
TP6
C16
JP7
TA
B
CD
SLEEP
CLI
OP1_EN
OP1_CTL
VCC_O1
DDO1
DDO1
VEE_O1
VEE_O2
DDO2
DDO2
VCC_O2
OP2_CTL
OP2_EN
SQ_ADJ
BYPASS
AGC
AGC
GAIN_SEL
SDI
SDI
VEE_A
VCC_A
1
ON
1
2
3
1
2
3
C
B
E
1
2
3
3
2
1
3
2
1
2
1
2
1
10μF
