参数资料
型号: DAC5674EVM
厂商: Texas Instruments
文件页数: 24/39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:
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
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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相关代理商/技术参数
参数描述
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