0.1uF
C34
0.1uF
C33
0.1uF
C31
USB_D+
SCLK_PRE
SDATA_PRE
SEN_PRE
DIG_SPI_EN_PRE
USB_LED_PRE
SDOUT_POST
LMK_CS_PRE
0.1uF
C27
0.1uF
C26
+3.3_ISO
+5V_USB
GND
GND
SCLK_PRE
DIG_SPI_EN_PRE
SEN_PRE
SDATA_PRE
SCLK_3.3
DIG_SPI_3.3
SEN_3.3
SDATA_3.3
0.1uF
C35
0.1uF
C36
+3.3_ISO
+5V_USB
LMK_CS_PRE
SDOUT_POST
+5V_USB
USB
USB_GND
LMK_CS
USB_D-
GND
GND
SDOUT_PRE
TSW_GPIO_4
TSW_GPIO_5
TSW_GPIO_6
TSW_GPIO_7
SCLK_3.3
DIG_SPI_3.3
SEN_3.3
SDATA_3.3
SDOUT_PRE
TP18
USB_LED_PRE
GND
Super Red
1
2
D5
USB_LED
USB_LED
+3.3_ISO
AFE_RST_PRE
AFE_RST_PRE
AFE_RESET
VCC1
1
GND1
2
INA
3
INB
4
INC
5
IND
6
NC
7
GND1
8
GND2
9
EN
10
OUTD
11
OUTC
12
OUTB
13
OUTA
14
GND2
15
VCC2
16
U6
ISO7140CCDBQR
VCC1
1
GND1
2
INA
3
INB
4
INC
5
OUTD
6
EN1
7
GND1
8
GND2
9
EN2
10
IND
11
OUTC
12
OUTB
13
OUTA
14
GND2
15
VCC2
16
U9
ISO7141CCDBQR
USB_SPI_EN
USB_SPI_EN
0
R15
DNP
0
R16
DNP
0
R17
DNP
0
R18
DNP
0
R20
DNP
TSW_GPIO_10
D0
1
D4
2
D2
3
VCCIO
4
D1
5
D7
6
GND
7
NC
8
D5
9
D6
10
D3
11
PWREN#
12
RD#
13
WR
14
USBDP
15
USBDM
16
3V3OUT
17
GND
18
RESET#
19
VCC
20
GND
21
TXE#
22
RXF
23
NC
24
AGND
25
TEST
26
OSCI
27
OSCO
28
U7
FT245RL
3.3V_USB_RX
+5V_USB
USB_D+
USB_D-
47pF
C30
47pF
C32
120 ohm
FB17
USB_GND
USB_GND
USB_GND
USB_GND
USB_GND
0
R22
8
9
VBUS
1
GND
5
6
7
D-
2
D+
3
ID
4
J5
USB_GND
RESET_3.3
5
4
1
2
3
J4
0
R19
100
R23
+3.3VD
A
3
VCCA
1
B
4
DIR
5
GND
2
VCCB
6
U20
SN74AVCH1T45DBVR
SDOUT_PRE
SDOUT
GND
GND
+1.8VD
+3.3_ISO
VCCA
1
1DIR
2
2DIR
3
1A1
4
1A2
5
2A1
6
2A2
7
GND
8
GND
9
2B2
10
2B1
11
1B2
12
1B1
13
2OE
14
1OE
15
VCCB
16
U8
SN74AVC4T245PWR
0.1uF
C28
0.1uF
C29
SCLK_3.3
DIG_SPI_3.3
SEN_3.3
SDATA_3.3
SCLK
DIG_SPI_EN
SEN
SDATA
GND
+3.3_ISO
+1.8VD
GND
GND
GND
0.1uF
C260
0.1uF
C261
510
R21
GND
RESET_3.3
604
R3
USB Connector and FTDI Port
Digital Isolator
Level Translator
AFE5818 EVM Schematic
41
SLOU430A – December 2015 – Revised February 2016
Copyright © 2015–2016, Texas Instruments Incorporated
Hardware Reference
Figure 58. AFE5818 Rev C EVM Schematic 2 of 11