Texas Instruments DAC82002EVM, Руководство пользователя, Страница: 7 / 24

3 Detailed Description
3.1 Hardware Description
The following sections provide detailed information on the EVM hardware and jumper configuration settings.
3.1.1 Theory of Operation
Figure 3-1 shows a simplified schematic of the DAC82002EVM board. By default, the DAC82002EVM features
two OPA388 single-channel, low-noise operational amplifiers, and one OPA2328 dual-channel high-speed
operational amplifier. Use jumpers J9 and J11 to select between unbuffered, low-noise, or high-speed output
configurations for VOUTA and VOUTB. Adapters for 8-pin DIP packages are available that allow for the
replacement of the default operational amplifiers with other options.
DAC82002
OPA
388
OPA
2328
OPA
2328
OPA
388
MUX
VOUTA
MUX
USB
FT4222
SPI
External VDD
VOUTB
REF5025
2.5 V
External VREF
3.3 V
Figure 3-1. DAC82002EVM Hardware Simplified Schematic
3.1.1.1 Signal Definitions
The DAC82002EVM provides access to DAC pins through connection J6. Table 3-1 lists the J6 pin definitions.
Table 3-1. DAC82002EVM J6 Pin Definitions
Pin# Signal Description
1 SDIN FTDI serial data signal for DAC
2 GND Ground
3 SCLK FTDI serial CLK signal for DAC
4 GND Ground
5 SYNC
Serial data enable of SPI. Active
low. This input is the frame-
synchronization signal for the serial
data.
6 GND Ground
7 RESET Active-low RESET for DAC
8 GND Ground
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SBAU401 – AUGUST 2022
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DAC82002EVM User's Guide 7
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