參數(shù)資料
型號: DAC7612U
元件分類: 外設(shè)及接口
英文描述: Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????)
中文描述: 單電源RS232C接口線路驅(qū)動器/接收器(單電源RS232C接口線收發(fā)器(2發(fā)2收))
文件頁數(shù): 12/12頁
文件大?。?/td> 126K
代理商: DAC7612U
12
DAC7612
FIGURE 4. Suggested Power and Ground Connections for a DAC7612 Sharing a +5V Supply with a Digital System.
APPLICATIONS
POWER AND GROUNDING
The DAC7612 can be used in a wide variety of situations—
from low power, battery operated systems to large-scale
industrial process control systems. In addition, some appli-
cations require better performance than others, or are par-
ticularly sensitive to one or two specific parameters. This
diversity makes it difficult to define definite rules to follow
concerning the power supply, bypassing, and grounding.
The following discussion must be considered in relation to
the desired performance and needs of the particular system.
A precision analog component requires careful layout, ad-
equate bypassing, and a clean, well-regulated power supply.
As the DAC7612 is a single-supply, +5V component, it will
often be used in conjunction with digital logic,
microcontrollers, microprocessors, and digital signal proces-
sors. The more digital logic present in the design and the
higher the switching speed, the more difficult it will be to
achieve good performance.
Because the DAC7612 has a single ground pin, all return
currents, including digital and analog return currents, must
flow through this pin. The GND pin is also the ground
reference point for the internal bandgap reference. Ideally,
GND would be connected directly to an analog ground
plane. This plane would be separate from the ground con-
nection for the digital components until they are connected
at the power entry point of the system (see Figure 4).
The power applied to V
DD
should be well regulated and low-
noise. Switching power supplies and DC/DC converters will
often have high-frequency glitches or spikes riding on the
output voltage. In addition, digital components can create
similar high frequency spikes as their internal logic switches
states. This noise can easily couple into the DAC output
voltage through various paths between V
DD
and V
OUT
.
As with the GND connection, V
DD
should be connected to
a +5V power supply plane or trace that is separate from the
connection for digital logic until they are connected at the
power entry point. In addition, the 10
μ
F and 0.1
μ
F capaci-
tors shown in Figure 4 are strongly recommended and
should be installed as close to V
DD
and ground as possible.
In some situations, additional bypassing may be required
such as a 100
μ
F electrolytic capacitor or even a “Pi” filter
made up of inductors and capacitors—all designed to essen-
tially lowpass filter the +5V supply, removing the high
frequency noise (see Figure 4).
+
+5V
GND
100
μ
F
Digital Circuits
+5V
GND
+5V
Power
Supply
Other
Analog
Components
V
DD
GND
DAC7612
+
10
μ
F
0.1
μ
F
Optional
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DAC7612U 制造商:BURR-BROWN 功能描述:IC 12BIT DAC 7612 SOIC8 制造商:Texas Instruments 功能描述:IC 12BIT DAC 130KHZ 7612 SOIC8
DAC7612U 制造商:Texas Instruments 功能描述:D/A Converter (D-A) IC
DAC7612U/2K5 功能描述:數(shù)模轉(zhuǎn)換器- DAC Dual 12-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)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC7612U/2K5G4 功能描述:數(shù)模轉(zhuǎn)換器- DAC Dual 12-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)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC7612UB 功能描述:數(shù)模轉(zhuǎn)換器- DAC Dual 12-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)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube