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参数资料
| 型号： | DAC7643VFBTG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | DAC |
| 英文描述： | PARALLEL, WORD INPUT LOADING, 8 us SETTLING TIME, 16-BIT DAC, PQFP32 |
| 封装： | GREEN, PLASTIC, LQFP-32 |
| 文件页数： | 4/25页 |
| 文件大小： | 981K |
| 代理商： | DAC7643VFBTG4 |
DAC7642, DAC7643
12
SBAS233
www.ti.com
THEORY OF OPERATION
The DAC7642 and DAC7643 are dual channel, voltage
output, 16-bit DACs. The architecture is an R-2R ladder
configuration with the three MSB’s segmented followed by an
operational amplifier that serves as a buffer. Each DAC has
its own R-2R ladder network, segmented MSBs, and output
op amp, as shown in Figure 1. The minimum voltage output
(zero-scale) and maximum voltage output (full-scale) are set
by the external voltage references VREFL and VREFH, respec-
tively. The digital input is a 16-bit parallel word and the DAC
input registers offer a readback capability. The converters
can be powered from either a single +5V supply or a dual
±5V supply. Each device offers a reset function which imme-
diately sets all DAC output voltages, DAC registers and Input
registers to mid-scale, code 8000H (DAC7642), or to zero-
scale, code 0000H (DAC7643). See Figures 2 and 3 for the
basic configurations of the DAC7642 and DAC7643.
FIGURE 1. DAC7642 and DAC7643 Architecture.
R
2R
V
REFH
V
OUT
V
OUT Sense
V
REFH Sense
V
REFL
V
REFL Sense
R
F
TYPICAL CHARACTERISTICS: VSS = –5V (Cont.)
At TA = +25°C, VCC = +5V, VSS = –5V, VREFH = +2.5V, VREFL = –2.5V, representative unit, unless otherwise specified.
Time (1
s/div)
OUTPUT VOLTAGE
vs MIDSCALE GLITCH PERFORMANCE
Output
Voltage
(50mV/div)
+5V
LDAC
0
7FFF
H to 8000H
Time (1
s/div)
OUTPUT VOLTAGE
vs MIDSCALE GLITCH PERFORMANCE
Output
Voltage
(50mV/div)
+5V
LDAC
0
8000
H to 7FFFH
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DAC7643VFR | 功能描述:数模转换器- DAC 16-Bit Dual Voltage Output DAC 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 |
| DAC7643VFRG4 | 功能描述:数模转换器- DAC 16-Bit Dual Voltage Output DAC 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 |
| DAC7643VFT | 功能描述:数模转换器- DAC 16-Bit Dual Voltage Output DAC 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 |
| DAC7643VFTG4 | 功能描述:数模转换器- DAC 16-Bit Dual Voltage Output DAC 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 |
| DAC7644 | 制造商:BB 制造商全称:BB 功能描述:16-Bit, Quad Voltage Output DIGITAL-TO-ANALOG CONVERTER |
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