參數資料
型號: DAC5674EVM
廠商: Texas Instruments
文件頁數: 24/39頁
文件大小: 0K
描述: EVAL MODULE FOR DAC5674
產品培訓模塊: Data Converter Basics
標準包裝: 1
系列: CommsDAC™
DAC 的數量: 1
位數: 14
采樣率(每秒): 400M
數據接口: 并聯
設置時間: 20ns
DAC 型: 電流
工作溫度: -40°C ~ 85°C
已供物品:
已用 IC / 零件: DAC5674
相關產品: 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
其它名稱: 296-30860
DAC5674EVM-ND
DAC5674
SLWS148A SEPTEMBER 2003 REVISED OCTOBER 2005
www.ti.com
30
DESIGNING THE PLL LOOP FILTER
The DAC5674 contains an external loop filter to set the bandwidth and phase margin of the PLL. For the external
second-order filter shown in Figure 38, the components R1, C1, and C2 are set by the user to optimize the PLL
for the application. The resistance R3 = 200
. and the capacitance C3 = 8 pF are internal to the DAC5674.
Note that R1 and C1 can be reversed.
R3
C3
R1
C1
C2
External
Internal
Figure 38. DAC5674 Loop Filter
0
50
100
150
200
250
300
350
400
450
500
0
100
200
300
400
500
600
Typical DAC5674 Gvco at 25
5C
Frequency MHz
VCO
Gain
MHz
Figure 39. Typical VCO Gain vs VCO Frequency at 25
°C
The typical VCO gain (Gvco) (the slope of VCO frequency vs voltage) as a function of VCO frequency for the
DAC5674 is shown in Figure 39. For the lowest possible phase noise, the VCO frequency should be chosen
so Gvco is minimized, where
Fvco = Fdata
× Interpolation × PLL Divider:
For example, if Fdata = 100 MSPS and 2
× interpolation is used, the PLL divider should be set to 2 to lock the
VCO at 400 MHz for a typical Gvco of 210 MHz/V. Note that the maximum specified VCO frequency range is
160 MHz to 400 MHz.
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相關代理商/技術參數
參數描述
DAC5674IPHP 功能描述:數模轉換器- DAC 14-Bit 400 CommsDAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC5674IPHPG4 功能描述:數模轉換器- DAC 14-Bit 400 CommsDAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC5674IPHP-ND 制造商: 功能描述: 制造商:undefined 功能描述:
DAC5674IPHPR 功能描述:數模轉換器- DAC 14-Bit 400 CommsDAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC5674IPHPRG4 功能描述:數模轉換器- DAC 14-Bit 400 CommsDAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube