參數(shù)資料
型號： DAC8574EVM
廠商： Texas Instruments, Inc.
英文描述： DAC8574 Evaluation Module(DAC8574評估板)
中文描述： DAC8574評估模塊（DAC8574評估板）
文件頁數(shù)： 10/32頁
文件大?。?/td> 502K
代理商： DAC8574EVM
Features
1-2
1.1
Features
This EVM features the DAC8574 digital-to-analog converter (DAC). The
DAC8574 EVM is a simple evaluation module designed for a quick and easy
way to evaluate the functionality and performance of the high resolution,
quad-channel, and serial I
2
C
input DAC. This EVM features a serial I
2
C
interface to communicate with any host microprocessor or TI DSP base
system.
1.2
Power Requirements
The following sections describe the power requirements of this EVM.
1.2.1
Supply Voltage
The dc power supply requirement for the digital section (V
DD
) of this EVM is
typically 5 V connected to the J5-1 or via J6-10 terminal (when plugged in with
another EVM board or interface card) and is referenced to ground through the
J5-2 and J6-5 terminal. The dc power supply requirements for the analog
section of this EVM are as follows; the V
CC
and V
SS
ranges from 15.75 V to
-15.75 V maximum and connects through J1-3 and J1-1 respectively, or
through J6-1 and J6-2 terminals. The 5 VA connects through J5-3 or J6-3
and the 3.3 VA connects through J6-8. All of the analog power supplies are
referenced to analog ground through J1-2 and J6-6 terminals.
The device under test, U1, analog power supply can be powered by either 5 VA
or 3.3 VA by selecting the proper position of jumper W1. This allows the
DAC8574 analog section to operate in either supply power while the I/O and
digital section is powered by 5 V, V
DD
.
The V
CC
supply source is mainly used to provide the positive rail of the external
output op-amp, U2, the reference chip, U3 and the reference buffer, U8. The
negative rail of the output op-amp, U2, can be selected between V
SS
and
AGND via W5 jumper. The external op-amp is installed as an option to provide
output signal conditioning or boost capacitive load drive and for other output
mode requirement desired.
Caution
To avoid potential damage to the EVM board, make sure that the
correct cables are connected to their respective terminals as
labeled on the EVM board.
Stresses above the maximum listed voltage ratings may cause
permanent damage to the device.
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