Datasheet
0R
R27
0R
R24 IN_N
IN_P
0.01uF
C12
TP13
TP14
DET_N
DET_P
1.00k
R28
VCM_SHIELD
TP8
VBG
TX_N
TX_P
TP17
TX_LED_N
TX_LED_P
TP30
AFE_PDNZ
AFE_PDNZ
TP22
AFE_RESETZ
ADC_RDY
STE
SIMO
SOMI
SCLK
PD_ALM
LED_ALM
DIAG_END
TP6
TP20
0.1uF
C10
XIN_M SP
LED_DRV_SUP
RX_DIG_SUP
RX_DIG_SUP
TX_CTRL_SUP
BAV99W-7-F
75V
1
3
2
D1
BAV99W-7-F
75V
1
3
2
D2
RX_ANA_SUP
VCM_AFE
2.2uF
C41
2.2uF
C42
0.1uF
C16
TP25
BAV99W-7-F
75V
1
3
2
D3
BAV99W-7-F
75V
1
3
2
D4
LED_DRV_SUP
1uF
C15
0.1uF
C9
RX_ANA_SUP
AFE_CLKOUT
TP7
TP12
R32 130R
R36 130R
R40 130R
R22 130R
R20 130R
NellCor DS-100A PulseOxConnectors
0R
Jumper
R44
0R
Jumper
R48
VCM Shield runs to the
DB9 connector and back
R41 130R
DB9-F
1
2
3
4
5
6
7
8
9
11
10
J2
DB9-F-TP
INM
1
INP
2
RX_ANA_GND
3
VCM
4
DNC
5
DNC
6
BG
7
VSS
8
RSVD
9
DNC
10
TX_CTRL_SUP
11
LED_DRV_GND
12
LED_DRV_GND
13
TXM
14
TXP
15
LED_DRV_GND
16
LED_DRV_SUP
17
LED_DRV_SUP
18
RX_DIG_GND
19
AFE_PDNZ
20
DIAG_END
21
LED_ALM
22
PD_ALM
23
SPI_CLK
24
SPI_SOMI
25
SPI_SIMO
26
SPI_STE
27
ADC_RDY
28
RESETZ
29
CLK_OUT
30
RX_DIG_SUP
31
RX_DIG_GND
32
RX_ANA_SUP
33
RX_OUTN
34
RX_OUTP
35
RX_ANA_GND
36
XOUT
37
XIN
38
RX_ANA_SUP
39
RX_ANA_GND
40
EP
41
AFE4400
U1
0R
DNI
R15
0R
R16
0R
R17
TP11
R23 10R
AFE44x0
18pF
C7
18pF
C6
1 2
8MHz
Y1
TP23
10K
R98
Footprint Update Done.
3 Sets of differential pairs. Route as adjacent
signals within each pair.
TXM and TXP
INM and INP (Surround with shield)
DNCP and DNCM
PCB Layouts and Schematics
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11.2 AFE44x0SPO2EVM Schematics
Figure 51 through Figure 55 show the EVM schematics (landscaped for readability).
Figure 51. AFE44x0SPO2EVM: AFE44x0 Schematic (1 of 5)
46
AFE4400 and AFE4490 Development Guide SLAU480A–January 2013–Revised February 2013
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