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參數(shù)資料
| 型號(hào)： | DAC7616UB |
| 英文描述： | Quad, Serial Input, 12-Bit, Voltage Output DIGITAL-TO-ANALOG CONVERTER |
| 中文描述： | 四，串行輸入，12位電壓輸出數(shù)字模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 12/13頁 |
| 文件大?。?/td> | 292K |
| 代理商： | DAC7616UB |
12
DAC7616
SBAS186
CS
(1)
CLK
(1)
LDAC
RESET
SERIAL SHIFT REGISTER
H
(2)
X
(3)
H
H
No Change
L
(4)
L
H
H
No Change
L
↑
↑
(5)
L
H
H
Advanced One Bit
H
H
Advanced One Bit
H
(6)
X
L
(7)
H
No Change
H
(6)
X
H
L
(8)
No Change
NOTES: (1) CS and CLK are interchangeable. (2) H = Logic HIGH. (3) X =
Don’t Care. (4) L = Logic LOW (5) = Positive Logic Transition. (6) A HIGH
value is suggested in order to avoid a “false clock” from advancing the shift
register and changing the shift register. (7) If data is clocked into the serial
register while LDAC is LOW, the selected DAC register will change as the shift
register bits “flow” through A1 and A0. This will corrupt the data in each DAC
register that has been erroneously selected. (8) RESET LOW causes no
change in the contents of the serial shift register.
FIGURE 3. Suggested Power and Ground Connections for a DAC7616 Sharing a +3V Supply with a Digital System.
TABLE III. Serial Shift Register Truth Table.
If both CS and CLK are used, then CS should rise only when
CLK is HIGH. If not, then either CS or CLK can be used to
operate the shift register. See Table III for more information.
+3V
Power Supply
Optional
Digital Circuits
DAC7616
V
DD
Other
Analog
Components
+3V
100
μ
F
1
μ
F to
10
μ
F
Ground
+3V
Ground
AGND
0.1
μ
F
+
+
Digital Input Coding
The DAC7616 input data is in Straight Binary format. The
output voltage is given by the following equation:
where N is the digital input code (in decimal). This equation
does not include the effects of offset (zero-scale) or gain
(full-scale) errors.
V
V
V
V
N
OUT
REFL
REFH
REFL
=
+
(
)
–
4096
LAYOUT
A precision analog component requires careful layout, ad-
equate bypassing, and clean, well-regulated power supplies.
As the DAC7616 offers single-supply operation, it will
often be used in close proximity with digital logic,
microcontrollers, microprocessors, and digital signal pro-
cessors. The more digital logic present in the design and the
higher the switching speed, the more difficult it will be to
keep digital noise from appearing at the converter output.
Because the DAC7616 has a single ground pin, all return
currents, including digital and analog return currents, must
flow through the GND pin. Ideally, GND should be con-
nected directly to an analog ground plane. This plane should
be separate from the ground connection for the digital
components until they were connected at the power entry
point of the system (see Figure 3).
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 the power connec-
tions and analog output.
As with the GND connection, V
DD
should be connected to
a +3V 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 1
μ
F to 10
μ
F and 0.1
μ
F
capacitors shown in Figure 4 are strongly recommended. 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 essentially
lowpass filter the +3V supply, removing the high frequency
noise (see Figure 3).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DAC7616UB/1K | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Quad Ser In 12-Bit Voltage Output 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 |
| DAC7616UB/1KG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Quad Ser In 12-Bit Voltage Output 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 |
| DAC7616UBG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Quad Ser In 12-Bit Voltage Output 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 |
| DAC7616UG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Quad Ser In 12-Bit Voltage Output 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 |
| DAC7617 | 制造商:BB 制造商全稱:BB 功能描述:Quad, Serial Input, 12-Bit, Voltage Output DIGITAL-TO-ANALOG CONVERTER |
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