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參數(shù)資料
| 型號： | DAC5573IWR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | QUAD, 8-BIT, LOW-POWER, VOLTAGE OUTPUT, INTERFACE DIGITAL-TO-ANALOG CONVERTER |
| 中文描述： | 四，8位，低功耗，電壓輸出，接口數(shù)字，模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 28/30頁 |
| 文件大?。?/td> | 499K |
| 代理商： | DAC5573IWR |
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REF02
15 V
5 V
1.6 mA
V
DD
SCL
SDA
I
2
C
Interface
V
OUT
= 0 V to 5 V
DAC5573
LAYOUT
A precision analog component requires careful layout, adequate bypassing, and clean, well-regulated power
supplies.
DAC5573
SLAS401–NOVEMBER 2003
APPLICATION INFORMATION (continued)
V
DD
= 5 V. When a DAC output is loaded, the REF02 also needs to supply the current to the load. The total
typical current required (with a 5-k
load on a single DAC output) is:
600 μA + (5 V / 5 k
) = 1.6 mA
The load regulation of the REF02 is typically 0.005%/mA, which results in an error of 400 μV for 1.6 mA of
current drawn from it. This corresponds to a 0.02 LSB error for a 0 V to 5 V output range.
Figure 40. REF02 Power Supply
For best performance, the power applied to V
DD
must be well-regulated and low noise. Switching power supplies
and dc/dc converters 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 the power connections and analog output.
As with the GND connection, V
must be connected to a positive 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, a 1-μF to 10-μF
capacitor in parallel with a 0.1-μF bypass capacitor is strongly recommended. In some situations, additional
bypassing may be required, such as a 100-μF electrolytic capacitor or even a Pi filter made up of inductors and
capacitors—all designed to essentially low-pass filter the –5-V supply, removing the high-frequency noise.
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| DAC5574 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:QUAD, 8-BIT, LOW-POWER, VOLTAGE OUTPUT, I2C INTERFACE DIGITAL TO ANALOG CONVERTER |
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