參數(shù)資料
型號(hào)： DAC8531EVM
廠商： Texas Instruments, Inc.
英文描述： DAC8531 Evaluation Module(DAC8531評(píng)估板)
中文描述： DAC8531評(píng)估模塊（DAC8531評(píng)估板）
文件頁(yè)數(shù)： 31/42頁(yè)
文件大?。?/td> 788K
代理商： DAC8531EVM
Host Processor Interface
3-9
EVM Operation
Table 3
–
5.Capacitive Load Drive Output Jumper Settings
Reference
Jumper
Setting
Function
W7
2
–
3
Select 5 V for the positive rail supply of the op-amp if W12 is closed
W8
1
–
2
Negative rail of the op-amp tied to analog GND
W10
Open
Disconnect V
REF
from negative input of op-amp
W11
Open
(see Note)
Disconnect R12 (see Note)
W12
Close
Supplies the constant 5 V to the positive rail of the op-amp if W7, pins 2 and 3,
are shorted together
W13
5
–
6
Buffered output of DAC is channeled to the output terminals
Note:
If there is a need to incrementally adjust the capacitive load output, replace R12 with a capacitor with the desired capaci-
tance value and close W11.
3.2.3
Bipolar Operation Using the DAC8531
Although the DAC8531 has been designed for single-supply operation, the
bipolar output of operation is implemented using the circuit shown in
Figure 3
–
7. The output of the circuit is an output voltage range of
±
V
REF
.
The
rail-to-rail operation at the amplifier output is achievable using an OPA350 as
the output amplifier.
Figure 3
–
7.Bipolar Operation With the DAC8531
_
+
5 V
–
5 V
OPA350
R2
10 k
R1
10 k
U11
V
FB
V
OUT
V
REF
Three-Wire
Serial Interface
0.1
μ
F
10
μ
F
V
REF
DAC8531
U12
±
5 V
The EVM requires an additional
±
15-V power supply to provide the supply rails
for the OPA177 op-amp, U17. The
±
15-V supply is provided through the J1
connector of the EVM. The 15 V is attached to J1-3 terminal and the
–
15 V is
attached to J1-1 terminal. The
±
15-V supplies are referenced to J1-2 terminal.
The OPA177 op-amp is specifically used to generate the
–
5-V supply voltage
for the negative rail of the OPA350 op-amp circuit, U12.
The bipolar configuration is accomplished by following the correct jumper
settings according to Table 3
–
6.
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DAC8531IDRBTG4 功能描述:數(shù)模轉(zhuǎn)換器- DAC Lo-Pwr R-to-R Out 16-Bit Serial Input RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
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