USB2ANY
POWE R SUPPLY
(Optiona l)
System Setup
5
SLAU818 – November 2019
Copyright © 2019, Texas Instruments Incorporated
DAC80502 Evaluation Module
2.2
Hardware Setup
This section provides the overall system setup for the EVM. A PC runs software that provides an interface
to the USB2ANY platform. This platform generates the optional 3.3-V power and digital signals used to
communicate with the EVM board. Connectors are included on the EVM board for external power
supplies.
displays the system setup for the DAC80502EVM.
Figure 3. Hardware Setup
2.2.1
Power Configurations
The DAC80502EVM provides electrical connections to the device supply pins. The connectors and
optional configurations are shown in the
. The headroom between the reference and the power
supply must be maintained. See the
for details.
Table 4. Power Supply Inputs
DAC80502EVM
Connector
Supply Name
Voltage Range
J2.1
VDD
2.7 V to 5.5 V
J2.2
GND
0 V
JP1.2 (Default)
USB_3p3
3.3 V from USB2ANY.
NOTE:
The REF-DIV bit must be 1 so that the internal 2.5-V
reference is divided by 2 to meet the headroom requirements.
The maximum output possible in this mode is 2.5 V.
Use a 5-V external VDD on J2 for a higher voltage swing.
2.2.2
Connecting the Hardware
Connect the USB cable from the USB2ANY platform to the PC. To connect the USB2ANY to the EVM
board, align and firmly connect the keyed ribbon connector to the J1 connector. Verify the connection is
snug; loose connections may cause intermittent operation.
2.2.3
Electrostatic Discharge Warning
Many of the components on the DAC80502EVM are susceptible to damage by electrostatic discharge
(ESD). Observe proper ESD handling precautions when unpacking and handling the EVM, including the
use of a grounded wrist strap at an approved ESD workstation.
