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| 型号： | DAC5674EVM |
| 厂商： | Texas Instruments |
| 文件页数： | 10/39页 |
| 文件大小： | 0K |
| 描述： | EVAL MODULE FOR DAC5674 |
| 产品培训模块： | Data Converter Basics |
| 标准包装： | 1 |
| 系列： | CommsDAC™ |
| DAC 的数量： | 1 |
| 位数： | 14 |
| 采样率（每秒）： | 400M |
| 数据接口： | 并联 |
| 设置时间： | 20ns |
| DAC 型： | 电流 |
| 工作温度： | -40°C ~ 85°C |
| 已供物品： | 板 |
| 已用 IC / 零件： | DAC5674 |
| 相关产品： | DAC5674IPHPRG4-ND - IC DAC 14BIT 400MSPS 48-HTQFP DAC5674IPHPR-ND - IC DAC 14BIT 400MSPS 48-HTQFP DAC5674IPHPG4-ND - IC DAC 14BIT 400MSPS 48-HTQFP 296-15726-ND - IC DAC 14BIT 400MSPS 48-HTQFP |
| 其它名称： | 296-30860 DAC5674EVM-ND |
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DAC5674
SLWS148A SEPTEMBER 2003 REVISED OCTOBER 2005
www.ti.com
18
High-Pass/High-Pass 4
y Interpolation Filter Operation
Figure 19 shows the high-pass/high-pass filter configuration. The transition bands of filter 1 and filter 2 allow
for the placement of the fundamental IF between 0.2
…0.4Fdata. In this configuration, the user can select the
images at Fdata + IF and 3Fdata – IF. For Fdata = 100 MSPS and a fundamental IF of 0.4 × Fdata = 40 MHz, this
would translate into images located at 140 MHz and 260 MHz. Note that this is the equivalent of mixing a 60-MHz
analog IF signal with a 200-MHz sine wave.
Input Spectrum
Output of DUC
1st 2x
interpolation
filter
Spectrum after
2x interpolation
2nd 2x
interpolation
filter
Spectrum after
4x interpolation
Fdata
=
Fdac
80 dB of
attenuation
Unwanted images
removed by HPF
80 dB of
attenuation
80 dB of
attenuation
Unwanted images
removed by HPF
Figure 19. High-Pass/High-Pass 4
y Interpolation Filter Operation
DAC Sinx/x Output Attenuation
The output frequency spectrum of the DACs shows some inherent attenuation due to their sample-and-hold
nature. The output of the DAC is normally seen as the signal sample held over the sampling time in a stair-step
manner. In the time domain, this step-like output can be thought of as an impulse sample of some value
convolved with a unit-square pulse with a duration of the sampling time. In the frequency domain, this translates
to the frequency response of the discretely sampled signal multiplied by the sinx/x frequency response function
of the square pulse. The sinx/x function has a null at every integer multiple of the sampling rate.
This is shown in Figure 20 for various data rates at 4
× interpolation.
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| DAC5674IPHP | 功能描述:数模转换器- DAC 14-Bit 400 CommsDAC 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 |
| DAC5674IPHPG4 | 功能描述:数模转换器- DAC 14-Bit 400 CommsDAC 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 |
| DAC5674IPHP-ND | 制造商: 功能描述: 制造商:undefined 功能描述: |
| DAC5674IPHPR | 功能描述:数模转换器- DAC 14-Bit 400 CommsDAC 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 |
| DAC5674IPHPRG4 | 功能描述:数模转换器- DAC 14-Bit 400 CommsDAC 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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