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DAC Function Extender
BO_AIO0
1
NT1
Net-Tie
2
BO_AIO2
3
BO_AIO4
4
NT3
Net-Tie
5
BO_AIO6
6
BO_AIO8
7
NT5
Net-Tie
8
BO_AIO10
9
BO_AIO12
10
NT7
Net-Tie
11
BO_AIO14
12
13
EXT_REF
14
AGND
15
VCC
16
VDD
GND
This pinout has been chosen to
match that of ADC BoosterPack
designs
This interface is only on TOP
side for the DAC launch
Vehicle. For function externder
board, this needs to be on both
sides similar to LP connectors
SLAU851 – MARCH 2021
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DAC Breakout Interface
VDD
J2
1
2
BO_SCLK_A0
3
BO_MIS O_LDAC_RSTSEL
4
BO_SCL_US BBTC_RSTSEL_LDAC
5
REF
6
BO_AIO1
7
BO_AIO3
8
9
VCC
REFGND
10
VSS
BO_AIO4
11
BO_AIO6
12
BO_AIO8
13
BO_AIO10
14
BO_AIO12
15
BO_AIO14
16
R16
0
REFGND
GND
This option is provided in case a
10-pin BO board is needed. The
resistor will be DNP by default.
J4
1
BO_AIO1
NT2
Net-Tie
2
3
BO_AIO3
4
BO_AIO5
5
NT4
Net-Tie
6
BO_AIO7
7
BO_AIO9
8
NT6
Net-Tie
9
BO_AIO11
10
BO_AIO13
NT8
Net-Tie
11
12
BO_AIO15
13
14
15
VSS
R47
0
16
VIO
J5
R46
0
GND
REFGND
DAC_VIO
Figure 4-2. BOOSTXL-DAC-PORT Schematic Page 2
Copyright © 2021 Texas Instruments Incorporated
REFGND must be shorted to
GND on the Breakout Board
J1
1
GND
2
BO_MOSI_CLR
3
BO_CS0_A1
4
Only 16-pin and
BO_SDA_CLR_RSTSEL_LDAC
5
BO_AIO0
32-pin DAC BO
6
BO_AIO2
boards are
7
supported. Other
DAC_VIO
8
configurations can
VIO
9
be used but with
BO_SPI2C_USBBTC_RST
10
custom
BO_LDAC
11
BO_AIO5
modifications
12
BO_AIO7
13
BO_AIO9
14
BO_AIO11
15
BO_AIO13
16
BO_AIO15
R34
0
GND
AGND
Reference Voltage Selection
5V
L3
R36
1.0k
742792651
C10
25V
0.1uF
GND
EXT_VDD
L2
R33
1.0k
742792651
C9
25V
0.1uF
AGND
GND
VDD
L1
742792651
VDD can either be used directly
or through an optional voltage
divider
Schematic, PCB Layout, and Bill of Materials
2V5_VREF
U4
LM4040DIM3X-2.5/NOPB
3
NC
3
2
1
J7
EXT_REF
REF
TP2
REF
3
5V0_VREF
2
1
U3
LM4040DIM3-5.0/NOPB
J3
C4
3
25V
NC
0.1uF
3
2
REFGND
1
J6
R31
0
R30
1.0k
C8
25V
0.1uF
GND
GND
DAC53204EVM User's Guide
23
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