- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376560 > DAC757IDGSR (Texas Instruments, Inc.) QUAD, 12-BIT, LOW-POWER, VOLTAGE OUTPUT, I2C INTERFACE DIGITAL-TO-ANALOG CONVERTER PDF資料下載
參數(shù)資料
| 型號： | DAC757IDGSR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | QUAD, 12-BIT, LOW-POWER, VOLTAGE OUTPUT, I2C INTERFACE DIGITAL-TO-ANALOG CONVERTER |
| 中文描述： | 四，12位，低功耗，電壓輸出，I2C接口的數(shù)字模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 28/31頁 |
| 文件大?。?/td> | 783K |
| 代理商： | DAC757IDGSR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁當(dāng)前第28頁第29頁第30頁第31頁
www.ti.com
REF02
15 V
5 V
1.6 mA
V
DD
SCL
SDA
I
2
C
Interface
V
OUT
= 0 V to 5 V
DAC7574
DAC7574
SLAS375–JUNE 2003
APPLICATION INFORMATION (continued)
POWER SUPPLY REJECTION
The positive reference voltage input of DAC7574 is internally tied to the power supply pin of the device. This
increases I
2
C system flexibility, creating room for an extra I
2
C address pin in a low pin-count package. To
eliminate the supply noise appearing at the DAC output, the user must pay close attention to how DAC7574 is
powered. The supply to DAC7574 must be clean and well regulated. For best performance, use of a precision
voltage reference is recommended to supply power to DAC7574. This is equivalent to providing a precision
external reference to the device. Due to low power consumption of DAC7574, load regulation errors are
negligible. In order to avoid excess power consumption at the Schmitt-triggered inputs of DAC7574, the precision
reference voltage should be close to the I
2
C bus pullup voltage. For 3-V, 3.3-V and 5-V I
2
C bus pullup voltages,
REF2930, REF2933 and REF02 precision voltage references are recommended respectively. These precision
voltage references can be used to supply power for multiple devices on a system.
USING REF02 AS A POWER SUPPLY FOR DAC7574
Due to the extremely low supply current required by the DAC7574, a possible configuration is to use a REF02
+5 V precision voltage reference to supply the required voltage to the DAC7574’s supply input as well as the
reference input, as shown in Figure 42. This is especially useful if the power supply is quite noisy or if the system
supply voltages are at some value other than 5 V. The REF02 outputs a steady supply voltage for the DAC7574.
If the REF02 is used, the current it needs to supply to the DAC7574 is 600 μA typical and 900 μA max for
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 400μV for 1.6-mA of current
drawn from it. This corresponds to a 0.33 LSB error for a 0 V to 5 V output range.
Figure 42. REF02 Power Supply
LAYOUT
A precision analog component requires careful layout, adequate bypassing, and clean, well-regulated power
supplies.
The power applied to V
DD
should 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.
28
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DAC7611 | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| DAC7611P | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| DAC7611PB | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| DAC7611U | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| DAC7611UB | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DAC-76 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| DAC7611 | 制造商:BB 制造商全稱:BB 功能描述:12-Bit Serial Input DIGITAL-TO-ANALOG CONVERTER |
| DAC7611P | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| DAC7611P | 制造商:BURR-BROWN 功能描述:IC 12BIT DAC 7611 DIP8 |
| DAC7611PB | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。