参数资料
型号: DAC5674IPHPRG4
厂商: Texas Instruments
文件页数: 7/39页
文件大小: 0K
描述: IC DAC 14BIT 400MSPS 48-HTQFP
产品培训模块: Data Converter Basics
标准包装: 1,000
系列: CommsDAC™
设置时间: 20ns
位数: 14
数据接口: 并联
转换器数目: 1
电压电源: 模拟和数字
功率耗散(最大): 550mW
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 48-TQFP 裸露焊盘
供应商设备封装: 48-HTQFP(7x7)
包装: 带卷 (TR)
输出数目和类型: 2 电流,单极
采样率(每秒): 400M
配用: 296-30860-ND - EVAL MODULE FOR DAC5674
DAC5674
SLWS148A SEPTEMBER 2003 REVISED OCTOBER 2005
www.ti.com
15
Low-Pass/Low-Pass 4
y Interpolation Filter Operation
Figure 16 shows the low-pass/low-pass interpolation operation where the 4
× FIR filter is implemented as a
cascade of two 2
× interpolation filters with the input signal coming from a digital signal source such as an FPGA
or digital upconverter (DUC). Users can place their IF signal at a maximum of 0.4 times the FIR filter input (i.e.,
DAC5674 input) data rate. For a 100-MSPS data rate, this would translate into a pass band extending to 40
MHz.
Fdata
=
Fdac
Input Spectrum
Output of DUC
1st 2x
interpolation
filter
Spectrum after
2x interpolation
2nd 2x
interpolation
filter
Spectrum after
4x interpolation
80 dB of
attenuation
2nd LPF removes
interpolation images
Figure 16. Low-Pass/Low-Pass 4
y Interpolation Filter Operation
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