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参数资料
| 型号： | DAC7512E/250 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | DAC |
| 英文描述： | SERIAL INPUT LOADING, 8 us SETTLING TIME, 12-BIT DAC, PDSO8 |
| 封装： | GREEN, PLASTIC, MSOP-8 |
| 文件页数： | 3/23页 |
| 文件大小： | 1094K |
| 代理商： | DAC7512E/250 |
DAC7512
11
SBAS156B
www.ti.com
TYPICAL CHARACTERISTICS: VDD = +2.7V (Cont.)
At TA = +25°C, +VDD = +2.7V, unless otherwise noted.
EXITING POWER-DOWN
(800
H Loaded)
Time (5
s/div)
CLK (2.7V/div)
V
OUT (1V/div)
CODE CHANGE GLITCH
Time (0.5
s/div)
Loaded with 2k
and 200pF to GND.
Code Change:
800
H to 7FFH.
V
OUT
(20mV/div)
THEORY OF OPERATION
DAC SECTION
The DAC7512 is fabricated using a CMOS process. The
architecture consists of a string DAC followed by an output
buffer amplifier. Since there is no reference input pin, the
power supply (VDD) acts as the reference. Figure 1 shows a
block diagram of the DAC architecture.
OUTPUT AMPLIFIER
The output buffer amplifier is capable of generating rail-to-
rail voltages on its output which gives an output range of
0V to VDD. It is capable of driving a load of 2k in parallel
with 1000pF to GND. The source and sink capabilities of the
output amplifier can be seen in the typical characteristics.
The slew rate is 1V/s with a half-scale settling time of 8s
with the output unloaded.
FIGURE 1. DAC7512 Architecture.
DAC Register
REF (+)
Resistor
String
REF(–)
Output
Amplifier
GND
V
DD
V
OUT
The input coding to the DAC7512 is straight binary, so the
ideal output voltage is given by:
VOUT = VDD
D
4096
where D = decimal equivalent of the binary code that is
loaded to the DAC register; it can range from 0 to 4095.
RESISTOR STRING
The resistor string section is shown in Figure 2. It is simply
a string of resistors, each of value R. The code loaded into
the DAC register determines at which node on the string the
voltage is tapped off to be fed into the output amplifier by
closing one of the switches connecting the string to the
amplifier. It is tested monotonic because it is a string of
resistors.
FIGURE 2. Resistor String.
To Output
Amplifier
R
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DAC7512N | 制造商:Texas Instruments 功能描述: |
| DAC7512N/250 | 功能描述:数模转换器- DAC Lo-Pwr R-To-R Output 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 |
| DAC7512N/250G4 | 功能描述:数模转换器- DAC Lo-Pwr R-To-R Output 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 |
| DAC7512N/3K | 功能描述:数模转换器- DAC Lo-Pwr R-To-R Output 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 |
| DAC7512N/3KG4 | 功能描述:数模转换器- DAC Lo-Pwr R-To-R Output 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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