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參數(shù)資料
| 型號： | DAC5674IPHPR |
| 廠商： | Texas Instruments |
| 文件頁數(shù)： | 10/39頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 14BIT 400MSPS 48-HTQFP |
| 產(chǎn)品培訓(xùn)模塊： | Data Converter Basics |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 系列： | CommsDAC™ |
| 設(shè)置時間： | 20ns |
| 位數(shù)： | 14 |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 電壓電源： | 模擬和數(shù)字 |
| 功率耗散（最大）： | 550mW |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-TQFP 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 48-HTQFP（7x7） |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 2 電流，單極 |
| 采樣率（每秒）： | 400M |
| 配用： | 296-30860-ND - EVAL MODULE FOR DAC5674 |
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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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| DAC5674IPHPRG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 400 CommsDAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| DAC5675 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:14-BIT, 400-MSPS DIGITAL-TO-ANALOG CONVERTER |
| DAC5675A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:14-Bit, 400MSPS Digital-to-Analog Converter |
| DAC5675AEVM | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 DAC5675A Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| DAC5675AIPHP | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 400-MSPS RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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