SBAU401 August   2022

 

  1.   DAC82002EVM
  2.   Trademarks
  3. 1Overview
    1. 1.1 Kit Contents
    2. 1.2 Related Documentation from Texas Instruments
  4. 2System Setup
    1. 2.1 Software Setup
      1. 2.1.1 Operating Systems
      2. 2.1.2 Software Installation
    2. 2.2 Hardware Setup
      1. 2.2.1 Electrostatic Discharge Caution
      2. 2.2.2 Power Configurations and Jumper Settings
      3. 2.2.3 Connecting the Hardware
  5. 3Detailed Description
    1. 3.1 Hardware Description
      1. 3.1.1 Theory of Operation
        1. 3.1.1.1 Signal Definitions
        2. 3.1.1.2 Buffer Customization
    2. 3.2 Software Description
      1. 3.2.1 Starting the Software
      2. 3.2.2 Software Features
        1. 3.2.2.1 Low Level Configuration Page
  6. 4Schematic, PCB Layout, and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials

2.2.2 Power Configurations and Jumper Settings

The DAC82002EVM provides electrical connections to the device supply pins. Table 2-1 shows the connections.

Table 2-1 DAC82002EVM Power Supply Inputs
DAC82002EVM Connector Supply Name Voltage Range
J1 VDD 1.8 V to 5.5 V; remove J3 if applying an external VDD to the DAC
J4 AGND 0 V
J7 VREFIN 2 V to VDD; ignore if J8 is shorted and onboard 2.5-V VREF is used
The jumper settings on the DAC82002EVM are crucial to the proper operation of the EVM. Table 2-2 provides the details of the configurable jumper settings on the EVM. Figure 4-1 defines the DAC82002EVM pin numbers.
Table 2-2 DAC82002EVM Jumper Settings
Jumper Default Position Available Option Description
J3 Short: 3.3 V from USB used as VDD Open: External VDD used External or onboard 3.3-V VDD selection
J5 Short: Reset DAC Value is 0 Open: Reset DAC value is midscale Reset DAC value selection
J8 Short: Onboard 2.5-V VREF used Open: External VREFIN used External or onboard 2.5-V VREF selection
J9 VOUTA: Unbuffered VOUTA output LN-A: Low-noise VOUTA output
HS-A: High-speed VOUTA output		 VOUTA Output Selection
J11 VOUTB: Unbuffered VOUTB output HS-B: High-speed VOUTB output
LN-B: Low-noise VOUTB output		 VOUTB Output Selection
J13 Short: FTDI disabled Open: FTDI enabled FTDI disable

If an external supply is applied to the DAC VDD input, remove jumper J3 to disconnect the 5-V USB supply from the DAC VDD pin. For SPI communication to operate, J13 must be open.

For J9 and J11, use only one short at a time for each. Short the J10 and J12 SMA connectors to output VOUTA and VOUTB, respectively.