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参数资料
| 型号： | DAC7714U |
| 元件分类： | DAC |
| 英文描述： | QUAD, SERIAL INPUT LOADING, 8 us SETTLING TIME, 12-BIT DAC, PDSO16 |
| 封装： | SO-16 |
| 文件页数： | 7/15页 |
| 文件大小： | 380K |
| 代理商： | DAC7714U |
15
DAC7714
Digital Input Coding
The DAC7714 input data is in Straight Binary format. The
output voltage is given by the following equation:
V
N
OUT
REFL
REFH
REFL
=
+
(
–
)
4096
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.
LAYOUT
A precision analog component requires careful layout, ad-
equate bypassing, and clean, well-regulated power supplies.
As the DAC7714 offers single-supply operation, it will often
be used in close proximity with digital logic, microcontrollers,
microprocessors, and digital signal processors. The more
digital logic present in the design and the higher the switch-
ing speed, the more difficult it will be to achieve good
performance from the converter.
Because the DAC7714 has a single ground pin, all return
currents, including digital and analog return currents, must
flow through the GND pin. Ideally, GND would be con-
nected directly to an analog ground plane. This plane would
be separate from the ground connection for the digital
components until they were connected at the power entry
point of the system.
The power applied to VCC (as well as VSS, if not grounded)
should be well regulated and low noise. Switching power
supplies and DC/DC converters will often have high-fre-
quency glitches or spikes riding on the output voltage. In
addition, digital components can create similar high-fre-
quency 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.
CS(1)
CLK(1)
LOADDACS
RESET
SERIAL SHIFT REGISTER
H(2)
X(3)
H
No Change
L(4)
L
H
No Change
L
↑(5)
H
Advanced One Bit
↑
L
H
Advanced One Bit
H(6)
XL(7)
H
No Change
H(6)
XH
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 LOADDACS 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.
TABLE III. Serial Shift Register Truth Table.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DAC7714U | 制造商:Texas Instruments 功能描述:IC DAC 12BIT 89KSPS SOIC-16 制造商:Texas Instruments 功能描述:IC, DAC, 12BIT, 89KSPS, SOIC-16 |
| DAC7714U/1K | 功能描述:数模转换器- DAC Quad Ser In 12-Bit Voltage Output 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 |
| DAC7714U/1KG4 | 功能描述:数模转换器- DAC Quad Ser In 12-Bit Voltage Output 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 |
| DAC7714UB | 功能描述:数模转换器- DAC Quad Ser In 12-Bit Voltage Output 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 |
| DAC7714UB/1K | 功能描述:数模转换器- DAC Quad Ser In 12-Bit Voltage Output 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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