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参数资料
| 型号： | DAC7612U |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | DAC |
| 英文描述： | SERIAL INPUT LOADING, 7 us SETTLING TIME, 12-BIT DAC, PDSO8 |
| 封装： | GREEN, SOIC-8 |
| 文件页数： | 4/16页 |
| 文件大小： | 316K |
| 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 VDD 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 VDD and VOUT.
As with the GND connection, VDD 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
F and 0.1F capaci-
tors shown in Figure 4 are strongly recommended and
should be installed as close to VDD and ground as possible.
In some situations, additional bypassing may be required
such as a 100
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
F
Digital Circuits
+5V
GND
+5V
Power
Supply
Other
Analog
Components
V
DD
GND
DAC7612
+
10
F
0.1
F
Optional
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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:数模转换器- DAC Dual 12-Bit Serial Input RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| DAC7612U/2K5G4 | 功能描述:数模转换器- DAC Dual 12-Bit Serial Input RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| DAC7612UB | 功能描述:数模转换器- DAC Dual 12-Bit Serial Input RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
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