Texas Instruments DAC8411EVM - DAC8411 Evaluation Module DAC8411EVM DAC8411EVM データシート
製品コード
DAC8411EVM
EVM Operation
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4.2
Stand-Alone Operation
When used as a stand-alone EVM, the analog power can be applied directly to J3 pin 3 referenced to pin
5. Optimal performance of the EVM requires a clean, well-regulated power source.
5. Optimal performance of the EVM requires a clean, well-regulated power source.
CAUTION
The DACs that are compatible with this EVM have a variety of power supply
requirements. Check the appropriate data sheets, and verify all power supplies
are within the safe operating limits of the converter before applying power to
the EVM.
requirements. Check the appropriate data sheets, and verify all power supplies
are within the safe operating limits of the converter before applying power to
the EVM.
5
EVM Operation
5.1
Analog Output
The analog output from the EVM is applied directly to J2 (top or bottom side) via jumper JP3. The default
condition of the jumper has a shunt placed between pins 1-2, which applies the analog output to J2 pin 2.
Moving the shunt on JP3 to cover pins 2-3 applies the analog output to J2 pin 10.
condition of the jumper has a shunt placed between pins 1-2, which applies the analog output to J2 pin 2.
Moving the shunt on JP3 to cover pins 2-3 applies the analog output to J2 pin 10.
5.2
Digital Control
The digital control signals can be applied directly to J1 (top or bottom side). The SC70 DAC EVM can also
be connected directly to a DSP or microcontroller capable of supplying the necessary serial control inputs.
Visit the product folder for the EVM or the installed device for a current list of compatible interface and/or
accessory boards.
be connected directly to a DSP or microcontroller capable of supplying the necessary serial control inputs.
Visit the product folder for the EVM or the installed device for a current list of compatible interface and/or
accessory boards.
5.3
SYNC
Jumper JP1 is provided to allow the source selection of the signal applied to the SYNC input of the DAC
installed on the EVM. The factory default condition for the EVM is to place a shunt jumper between pins
1-2 of JP1. This allows the Frame Sync (FS) signal from DSP host systems to be used as the SYNC input
to the DAC. This signal originates from J1.7. When the shunt on JP1 is moved to pins 2-3, a GPIO input
applied via J1.1 can be used to control the SYNC input to the DAC. This feature allows the possibility of
sharing the SPI bus with up to two SC70 DAC EVMs by stacking the boards together.
installed on the EVM. The factory default condition for the EVM is to place a shunt jumper between pins
1-2 of JP1. This allows the Frame Sync (FS) signal from DSP host systems to be used as the SYNC input
to the DAC. This signal originates from J1.7. When the shunt on JP1 is moved to pins 2-3, a GPIO input
applied via J1.1 can be used to control the SYNC input to the DAC. This feature allows the possibility of
sharing the SPI bus with up to two SC70 DAC EVMs by stacking the boards together.
5.4
Default Jumper Locations
provides a list of jumpers found on the EVM and their factory default conditions.
Table 4. EVM Default Jumper Settings
Jumper
Shunt Position Jumper Description
JP1
Pins 1-2
Controls SYNC (default is J1.7)
JP2
Pins 1-2
Controls DAC power/reference (default is U2, 4.096 V)
JP3
Pins 1-2
Controls analog output voltage (default is J2.2)
6
Using the SC70 DAC EVM With DXP
The SC70 DAC EVM is compatible with the DAC eXerciser Program (DXP) from Texas Instruments. DXP
is a tool that can generate the necessary control signals required to output various signals and waveforms
from the device installed on the SC70 DAC EVM. The SC70 DAC EVM-PDK kit combines one of the
DAC8411, DAC8311, DAC7311, DAC6311, or the DAC5311 EVM boards with the DSP-based modular
motherboard MMB0. The kit includes the DXP software for evaluation using any available USB port on a
Windows™ XP-based computer.
is a tool that can generate the necessary control signals required to output various signals and waveforms
from the device installed on the SC70 DAC EVM. The SC70 DAC EVM-PDK kit combines one of the
DAC8411, DAC8311, DAC7311, DAC6311, or the DAC5311 EVM boards with the DSP-based modular
motherboard MMB0. The kit includes the DXP software for evaluation using any available USB port on a
Windows™ XP-based computer.
4
SC70 DAC EVM
SLAU299 – November 2009
Copyright © 2009, Texas Instruments Incorporated