DS1045为4位双通道可编程延迟线,支持两个可编程输出,从 单输入。该CMOS器件能够以二进制步进产生输出,最大延迟 高达 84 ns。选择四个标准器件之一将允许2、3、4或5 ns的步进。表1 指示每个延迟的标准产品部件以及每个延迟可以获得的最大延迟 .part。
表 1.延迟与编程值
部件号 | 输出延迟值 | |||||||||||||||
DS1045-2 | 9 | 11 | 13 | 15 | 17 | 19 | 21 | 23 | 25 | 27 | 29 | 31 | 33 | 35 | 37 | 39 |
DS1045-3 | 9 | 12 | 15 | 18 | 21 | 24 | 27 | 30 | 33 | 36 | 39 | 42 | 45 | 48 | 51 | 54 |
DS1045-4 | 9 | 13 | 17 | 21 | 25 | 29 | 33 | 37 | 41 | 45 | 49 | 53 | 57 | 61 | 65 | 69 |
DS1045-5 | 9 | 14 | 19 | 24 | 29 | 34 | 39 | 44 | 49 | 54 | 59 | 64 | 69 | 74 | 79 | 84 |
每个延迟值的编程值 | ||||||||||||||||
A0 或 B0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 |
A1 或 B1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 |
A2 或 B2 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
A3 或 B3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
器件的每一部分都可以通过单独的输入端口进行编程。输入 A0 至 A3 控制 侧 A 输出,而输入 B0 通过 B3 控制侧 B 输出。输入可以保持静态 模式或动态更改。在动态模式下,必须满足数据启用、建立和保持时间。 通常,有效输出的延迟为15 ns。在过渡期间,输出处于未定义状态 州。输出的脉冲宽度将是所选输入延迟的输入的再现 延迟值。下一节包括典型应用。
每个输出能够驱动 10 个标准 74LS 型负载。该设备与两者兼容 TTL 和 CMOS,额定驱动 15 pF 负载。输入电容为10 pF。所有时间 测量值在 1.5 伏特下测量,上升和下降时间除外。输入和输出上升 下降时间在 0.6 伏到 2.4 伏之间测量。
最大操作特性
DS1045能够以非常高的速度工作。应考虑以下方面: 选择最大延迟步长时输入信号的最小脉冲宽度。例如,如果 DS1045-5的延迟为84 ns,则输入脉冲宽度不得短于9 ns。表2 总结了最小脉冲宽度(步进零延迟)、最大延迟时间和延迟容差 对于每个部件号。
表 2.部件号表
部件号 | 步进零延迟 | 最大延迟时间 | 最大延迟容差 |
DS1045-2 | 9 ± 1 ns | 39 纳秒 | ±1.8 纳秒 |
DS1045-3 | 9 ± 1 ns | 54 纳秒 | ±2.5 纳秒 |
DS1045-4 | 9 ± 1 ns | 69 纳秒 | ±3.3 纳秒 |
DS1045-5 | 9 ± 1 ns | 84 纳秒 | ±4.1 纳秒 |
方框图
DS1045由16级延迟线和两组数字多路复用器组成。器件的每一侧都可以通过为表1中指定的控制代码提供输入来选择适当的输出延迟级。二进制值选择成为输出的单个延迟阶段。
图1.DS1045 框图
电路分析
各个级可以被认为是具有可变容性负载的 RS 触发器。增加 容性负载会增加延迟。类似地,负载电容的减小也会降低延迟。这 可变容性负载的操作类似于压敏电阻的操作。此变量的影响 容性负载是精确控制各个级设置和复位时间。此过程 建立受控的上升和下降时间,并改善输入到输出波形信号的完整性 装置。在制造的最后阶段,在工厂建立精确的容性负载 过程。该电路的简化原理图如图2所示。
图2.DS1045电路图
家庭步骤特征
图3所示为该系列DS1045器件的一般特性,其函数为 二进制步长值与延迟时间的关系。
图3.DS1045系列延迟(按器件类型)
步进线性特性
图4显示了上升沿和下降沿信号的阶跃线性度。每个设备都展示了一个虚拟的 直线步长线性。器件规格限值表示启动延迟为零 每个器件在图表上的位置相同(9ns)。
图4.DS1045-2上升沿和下降沿延迟时间与步长的关系
这是由于第一阶段固有的延迟。指示任何给定步骤的最大偏差 在表 2 中。DS2-5在整个二进制范围内的最大步进容差额定为±1045.3 ns。 阶跃零处的延迟时间为9 ns±1 ns的初始缓冲延迟。
温度特性
DS1045具有出色的温度特性。图 5 显示了延迟的变化方式 每一步的时间受温度影响。数据是在 5.0 伏电源电压下获取的。一个 指示上升沿和下降沿信号的最大总偏移(Delta)小于±1 ns。
图5.温度变化(0°C 至 70°C)。
步长值 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
上升沿变化 (ns) | 0.80 | 0.10 | 0.20 | -0.20 | 0.40 | 0.00 | 0.20 | -0.20 | 0.25 | -0.20 | 0.00 | -0.30 | 0.05 | -0.20 | -0.10 | -0.40 |
下降沿变化 (ns) | 0.60 | 0.10 | 0.20 | -0.10 | 0.20 | -0.10 | 0.20 | -0.10 | 0.20 | -0.25 | 0.10 | -0.40 | -0.10 | -0.30 | -0.20 | -0.50 |
电压特性
DS1045为电压补偿器件,其输出(上升沿和下降沿)变化小于 300 皮秒,电压偏移从 4.75 伏到 5.25 伏。图 6 显示了每个值 16 个延迟步骤。
图6.DS1045电压补偿
延时与温度的关系:DS1045-3
A 侧上升沿信号 @ 电压 = 4.75 伏
程序步骤 | 延迟(纳秒) | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1 | 8.474 | 8.629 | 9.005 | 9.506 | 10.063 |
2 | 11.587 | 12.223 | 12.966 | 13.769 | 14.602 |
3 | 15.260 | 15.205 | 15.667 | 16.453 | 17.453 |
4 | 17.075 | 17.678 | 18.491 | 19.468 | 20.632 |
5 | 21.084 | 21.150 | 21.703 | 22.675 | 24.042 |
6 | 22.963 | 23.576 | 24.496 | 25.674 | 27.182 |
7 | 26.874 | 26.910 | 27.504 | 28.661 | 30.333 |
8 | 28.820 | 29.393 | 30.340 | 31.674 | 33.528 |
9 | 32.791 | 32.774 | 33.409 | 34.722 | 36.744 |
10 | 34.957 | 35.502 | 36.512 | 38.035 | 40.193 |
11 | 38.597 | 38.529 | 39.189 | 40.651 | 42.948 |
12 | 40.635 | 41.125 | 42.133 | 43.787 | 46.259 |
13 | 44.614 | 44.486 | 45.150 | 46.728 | 49.368 |
14 | 46.891 | 47.321 | 48.367 | 50.188 | 53.020 |
15 | 50.397 | 50.197 | 50.868 | 52.569 | 55.463 |
16 | 52.545 | 52.878 | 53.918 | 55.857 | 58.977 |
A 侧上升沿信号 @ 电压 = 5.00 伏
程序步骤 | 延迟(纳秒) | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1 | 8.546 | 8.594 | 8.898 | 9.33 | 9.835 |
2 | 11.539 | 12.162 | 12.869 | 13.619 | 14.388 |
3 | 15.459 | 15.341 | 15.622 | 16.217 | 17.056 |
4 | 17.179 | 17.716 | 18.449 | 19.293 | 20.333 |
5 | 21.45 | 21.378 | 21.698 | 22.413 | 23.515 |
6 | 23.168 | 23.713 | 24.491 | 25.46 | 26.761 |
7 | 27.362 | 27.241 | 27.567 | 28.381 | 29.717 |
8 | 29.151 | 29.638 | 30.405 | 31.46 | 33.01 |
9 | 33.405 | 33.22 | 33.535 | 34.442 | 36.035 |
10 | 35.399 | 35.852 | 36.646 | 37.805 | 39.591 |
11 | 39.357 | 39.107 | 39.402 | 40.381 | 42.179 |
12 | 41.217 | 41.592 | 42.342 | 43.57 | 45.603 |
13 | 45.492 | 45.185 | 45.442 | 46.491 | 48.56 |
14 | 47.597 | 47.914 | 48.667 | 49.989 | 52.243 |
15 | 51.413 | 51.04 | 51.272 | 52.368 | 54.579 |
16 | 53.398 | 53.622 | 54.304 | 55.676 | 58.13 |
A 侧上升沿信号 @ 电压 = 5.25 伏
程序步骤 | 延迟(纳秒) | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1 | 8.545 | 8.579 | 8.829 | 9.202 | 9.658 |
2 | 11.542 | 12.114 | 12.801 | 13.515 | 14.257 |
3 | 15.695 | 15.531 | 15.681 | 16.134 | 16.811 |
4 | 17.264 | 17.814 | 18.478 | 19.234 | 20.153 |
5 | 21.815 | 21.674 | 21.834 | 22.348 | 23.227 |
6 | 23.400 | 23.911 | 24.598 | 25.428 | 26.555 |
7 | 27.856 | 27.666 | 27.799 | 28.37 | 29.406 |
8 | 29.512 | 29.956 | 30.612 | 31.476 | 32.787 |
9 | 34.033 | 33.764 | 33.863 | 34.482 | 35.715 |
10 | 35.881 | 36.304 | 36.943 | 37.895 | 39.354 |
11 | 40.136 | 39.793 | 39.848 | 40.509 | 41.879 |
12 | 41.824 | 42.154 | 42.759 | 43.715 | 45.358 |
13 | 46.388 | 45.981 | 46.010 | 46.679 | 48.235 |
14 | 48.349 | 48.619 | 49.181 | 50.196 | 51.990 |
15 | 52.467 | 51.979 | 51.963 | 52.651 | 54.331 |
16 | 54.285 | 54.453 | 54.963 | 55.975 | 57.906 |
A 侧下降沿信号 @ 电压 = 4.75 伏
程序步骤 | 延迟(纳秒) | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1 | 8.741 | 8.901 | 9.368 | 9.941 | 10.558 |
2 | 12.066 | 12.637 | 13.352 | 14.115 | 14.922 |
3 | 15.645 | 15.565 | 16.071 | 16.874 | 17.899 |
4 | 17.586 | 18.14 | 18.924 | 19.864 | 21.012 |
5 | 21.306 | 21.378 | 21.949 | 22.954 | 24.33 |
6 | 23.517 | 24.096 | 24.944 | 26.075 | 27.575 |
7 | 27.156 | 27.195 | 27.814 | 29.006 | 30.682 |
8 | 29.296 | 29.806 | 30.697 | 31.968 | 33.814 |
9 | 33.025 | 33.018 | 33.677 | 35.03 | 37.076 |
10 | 35.355 | 35.81 | 36.736 | 38.201 | 40.341 |
11 | 38.887 | 38.816 | 39.464 | 40.95 | 43.304 |
12 | 41.014 | 41.387 | 42.317 | 43.916 | 46.385 |
13 | 44.944 | 44.822 | 45.493 | 47.119 | 49.784 |
14 | 47.186 | 47.499 | 48.439 | 50.169 | 52.938 |
15 | 50.828 | 50.618 | 51.28 | 53.015 | 55.946 |
16 | 52.914 | 53.122 | 54.036 | 55.895 | 58.934 |
A 侧下降沿信号 @ 电压 = 5.00 伏
程序步骤 | 延迟(纳秒) | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1 | 8.721 | 8.817 | 9.210 | 9.724 | 10.300 |
2 | 12.031 | 12.565 | 13.245 | 13.967 | 14.722 |
3 | 15.825 | 15.689 | 15.994 | 16.616 | 17.485 |
4 | 17.687 | 18.185 | 18.874 | 19.691 | 20.699 |
5 | 21.681 | 21.591 | 21.926 | 22.667 | 23.797 |
6 | 23.736 | 24.242 | 24.943 | 25.881 | 27.152 |
7 | 27.649 | 27.514 | 27.851 | 28.704 | 30.083 |
8 | 29.638 | 30.065 | 30.766 | 31.783 | 33.299 |
9 | 33.651 | 33.451 | 33.787 | 34.721 | 36.371 |
10 | 35.812 | 36.206 | 36.887 | 37.994 | 39.729 |
11 | 39.638 | 39.384 | 39.683 | 40.678 | 42.51 |
12 | 41.601 | 41.904 | 42.547 | 43.717 | 45.677 |
13 | 45.846 | 45.512 | 45.789 | 46.832 | 48.914 |
14 | 47.913 | 48.146 | 48.756 | 50.001 | 52.144 |
15 | 51.867 | 51.459 | 51.682 | 52.79 | 55.052 |
16 | 53.801 | 53.903 | 54.460 | 55.745 | 58.141 |
A 侧下降沿信号 @ 电压 = 5.25 伏
程序步骤 | 延迟(纳秒) | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1 | 8.713 | 8.76 | 9.091 | 9.547 | 10.079 |
2 | 11.987 | 12.505 | 13.173 | 13.856 | 14.563 |
3 | 16.143 | 15.884 | 16.05 | 16.494 | 17.216 |
4 | 17.767 | 18.269 | 18.901 | 19.621 | 20.528 |
5 | 22.07 | 21.893 | 22.052 | 22.578 | 23.501 |
6 | 23.963 | 24.438 | 25.058 | 25.85 | 26.94 |
7 | 28.182 | 27.936 | 28.091 | 28.67 | 29.769 |
8 | 29.992 | 30.392 | 30.986 | 31.807 | 33.08 |
9 | 34.287 | 33.999 | 34.111 | 34.749 | 36.022 |
10 | 36.31 | 36.652 | 37.211 | 38.093 | 39.511 |
11 | 40.423 | 40.067 | 40.128 | 40.775 | 42.204 |
12 | 42.224 | 42.477 | 42.985 | 43.875 | 45.467 |
13 | 46.739 | 46.318 | 46.346 | 47.033 | 48.62 |
14 | 48.669 | 48.854 | 49.31 | 50.238 | 51.973 |
15 | 52.909 | 52.401 | 52.379 | 53.062 | 54.774 |
16 | 54.702 | 54.754 | 55.151 | 56.081 | 57.944 |
延时与温度的关系: DS1045-4
下表给出了DS1045-4可编程延时的性能。绘制的数据与DS1045-3的曲线相似。所有步骤都是单调的,并显示出电压和温度的一致变化。
Vcc=4.75 伏上升沿
程序步骤 | 延迟(纳秒) | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1 | 7.775 | 7.923 | 8.361 | 8.880 | 9.450 |
2 | 11.547 | 11.545 | 11.933 | 12.640 | 13.55 |
3 | 15.751 | 16.140 | 16.656 | 17.281 | 18.041 |
4 | 19.229 | 19.264 | 19.632 | 20.328 | 21.270 |
5 | 23.533 | 23.973 | 24.485 | 25.097 | 25.931 |
6 | 27.207 | 27.283 | 27.637 | 28.332 | 29.353 |
7 | 31.417 | 31.844 | 32.287 | 32.850 | 33.697 |
8 | 35.129 | 35.202 | 35.479 | 36.124 | 37.175 |
9 | 39.374 | 39.817 | 40.226 | 40.763 | 41.667 |
10 | 43.061 | 43.172 | 43.449 | 44.118 | 45.229 |
11 | 47.382 | 47.811 | 48.136 | 48.597 | 49.490 |
12 | 50.877 | 51.000 | 51.213 | 51.823 | 52.970 |
13 | 55.357 | 55.797 | 56.087 | 56.518 | 57.462 |
14 | 59.099 | 59.227 | 59.417 | 60.014 | 61.238 |
15 | 63.287 | 63.690 | 63.842 | 64.194 | 65.131 |
16 | 67.211 | 67.337 | 67.442 | 67.943 | 69.168 |
Vcc=5.0 伏上升沿
程序步骤 | 延迟(纳秒) | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1 | 7.622 | 7.784 | 8.169 | 8.642 | 9.184 |
2 | 11.941 | 11.878 | 12.076 | 12.561 | 13.347 |
3 | 15.584 | 15.953 | 16.451 | 17.022 | 17.714 |
4 | 19.708 | 19.654 | 19.791 | 20.278 | 21.075 |
5 | 23.363 | 23.816 | 24.304 | 24.858 | 25.596 |
6 | 27.671 | 27.677 | 27.817 | 28.3 | 29.164 |
7 | 31.23 | 31.699 | 32.142 | 32.649 | 33.39 |
8 | 35.585 | 35.626 | 35.705 | 36.149 | 37.005 |
9 | 39.171 | 39.691 | 40.115 | 40.599 | 41.361 |
10 | 43.503 | 43.609 | 43.698 | 44.143 | 45.058 |
11 | 47.187 | 47.737 | 48.083 | 48.486 | 49.233 |
12 | 51.306 | 51.455 | 51.501 | 51.89 | 52.834 |
13 | 55.136 | 55.727 | 56.058 | 56.437 | 57.202 |
14 | 59.525 | 59.706 | 59.745 | 60.123 | 61.101 |
15 | 63.073 | 63.659 | 63.884 | 64.182 | 64.928 |
16 | 67.635 | 67.843 | 67.822 | 68.131 | 69.081 |
V抄送=5.25 伏上升沿
程序步骤 | 延迟(纳秒) | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1 | 7.510 | 7.668 | 8.015 | 8.453 | 8.957 |
2 | 12.359 | 12.304 | 12.378 | 12.696 | 13.329 |
3 | 15.445 | 15.82 | 16.297 | 16.824 | 17.465 |
4 | 20.203 | 20.156 | 20.178 | 20.452 | 21.096 |
5 | 23.215 | 23.69 | 24.175 | 24.683 | 25.355 |
6 | 28.143 | 28.19 | 28.225 | 28.507 | 29.174 |
7 | 31.064 | 31.596 | 32.056 | 32.529 | 33.178 |
8 | 36.051 | 36.165 | 36.159 | 36.404 | 37.067 |
9 | 39.010 | 39.614 | 40.062 | 40.517 | 41.17 |
10 | 43.933 | 44.152 | 44.177 | 44.420 | 45.134 |
11 | 47.004 | 47.672 | 48.098 | 48.475 | 49.104 |
12 | 51.734 | 52.003 | 52.015 | 52.241 | 52.949 |
13 | 54.945 | 55.683 | 56.095 | 56.447 | 57.101 |
14 | 59.929 | 60.281 | 60.306 | 60.493 | 61.23 |
15 | 62.861 | 63.646 | 63.984 | 64.276 | 64.886 |
16 | 68.064 | 68.472 | 68.446 | 68.577 | 69.271 |
Vcc=4.75 伏下降沿
程序步骤 | 延迟(纳秒) | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1 | 7.996 | 8.349 | 8.944 | 9.58 | 10.236 |
2 | 11.924 | 11.926 | 12.359 | 13.069 | 13.979 |
3 | 16.287 | 16.674 | 17.213 | 17.859 | 18.638 |
4 | 19.568 | 19.611 | 20.008 | 20.705 | 21.657 |
5 | 24.109 | 24.565 | 25.077 | 25.705 | 26.576 |
6 | 27.496 | 27.529 | 27.863 | 28.545 | 29.537 |
7 | 32.092 | 32.543 | 32.986 | 33.566 | 34.432 |
8 | 35.557 | 35.564 | 35.813 | 36.436 | 37.431 |
9 | 39.881 | 40.374 | 40.818 | 41.422 | 42.346 |
10 | 43.588 | 43.616 | 43.831 | 44.436 | 45.47 |
11 | 47.817 | 48.307 | 48.66 | 49.203 | 50.163 |
12 | 51.395 | 51.414 | 51.549 | 52.099 | 53.154 |
13 | 56.12 | 56.603 | 56.917 | 57.417 | 58.412 |
14 | 59.297 | 59.33 | 59.456 | 59.977 | 61.117 |
15 | 63.943 | 64.415 | 64.64 | 65.068 | 66.065 |
16 | 67.238 | 67.244 | 67.285 | 67.73 | 68.877 |
Vcc=5.00 伏下降沿
程序步骤 | 延迟(纳秒) | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1 | 7.794 | 8.145 | 8.698 | 9.297 | 9.912 |
2 | 12.311 | 12.233 | 12.432 | 12.945 | 13.732 |
3 | 16.093 | 16.491 | 16.994 | 17.587 | 18.297 |
4 | 20.018 | 19.957 | 20.127 | 20.622 | 21.442 |
5 | 23.88 | 24.383 | 24.876 | 25.46 | 26.225 |
6 | 27.944 | 27.904 | 28.026 | 28.49 | 29.329 |
7 | 31.854 | 32.387 | 32.826 | 33.354 | 34.114 |
8 | 36.017 | 35.986 | 36.029 | 36.429 | 37.259 |
9 | 39.641 | 40.226 | 40.672 | 41.216 | 42.045 |
10 | 44.04 | 44.051 | 44.068 | 44.455 | 45.315 |
11 | 47.564 | 48.164 | 48.559 | 49.044 | 49.861 |
12 | 51.824 | 51.857 | 51.821 | 52.172 | 53.021 |
13 | 55.838 | 56.478 | 56.848 | 57.291 | 58.132 |
14 | 59.709 | 59.782 | 59.757 | 60.099 | 60.973 |
15 | 63.662 | 64.338 | 64.627 | 64.997 | 65.83 |
16 | 67.644 | 67.735 | 67.628 | 67.891 | 68.808 |
Vcc=5.25 伏下降沿
程序步骤 | 延迟(纳秒) | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1 | 7.622 | 7.94 | 8.481 | 9.05 | 9.649 |
2 | 12.668 | 12.594 | 12.683 | 13.016 | 13.659 |
3 | 15.9 | 16.335 | 16.822 | 17.368 | 18.023 |
4 | 20.457 | 20.417 | 20.446 | 20.749 | 21.411 |
5 | 23.694 | 24.23 | 24.723 | 25.263 | 25.961 |
6 | 28.397 | 28.392 | 28.393 | 28.664 | 29.308 |
7 | 31.634 | 32.24 | 32.711 | 33.202 | 33.885 |
8 | 36.456 | 36.496 | 36.443 | 36.661 | 37.305 |
9 | 39.416 | 40.091 | 40.579 | 41.084 | 41.821 |
10 | 44.454 | 44.558 | 44.502 | 44.717 | 45.384 |
11 | 47.314 | 48.057 | 48.506 | 48.966 | 49.688 |
12 | 52.26 | 52.417 | 52.335 | 52.496 | 53.141 |
13 | 55.586 | 56.39 | 56.844 | 57.261 | 57.261 |
14 | 60.119 | 60.348 | 60.284 | 60.437 | 61.135 |
15 | 63.412 | 64.272 | 64.682 | 65.038 | 65.741 |
16 | 68.048 | 68.321 | 68.216 | 68.314 | 68.996 |
DS1045-4 延时与电压特性的关系
下图显示了DS1045-4的正负边沿延迟如何变化 步骤 1 和步骤 16 的电压变化为 5 伏 ±5%。对于步骤1,下降沿从7.923 ns开始,随着电压的增加而下降至7.579 ns。步骤 1 的上升沿遵循类似的曲线。对于步骤16,斜率为正,表示电压增加。下表显示了每个设备的确切值。DS1045-3和5的特性与DS1045-4相似。
DS1045-4 延时与电压/步进的关系
DS1045-3阶跃延迟变化与电压的关系
电压(伏特) | 4.75 | 5.00 | 5.25 |
编程步骤 1 下降沿 | 8.629 | 8.594 | 8.579 |
编程步骤 1 上升沿 | 8.901 | 8.817 | 8.760 |
编程步骤 16 下降沿 | 52.878 | 53.622 | 55.346 |
编程步骤 16 上升沿 | 53.122 | 53.903 | 55.675 |
DS1045-4阶跃延迟变化与电压的关系
电压(伏特) | 4.75 | 5.00 | 5.25 |
编程步骤 1 下降沿 | 7.923 | 7.784 | 7.579 |
编程步骤 1 上升沿 | 8.349 | 8.145 | 7.940 |
编程步骤 16 下降沿 | 67.337 | 67.843 | 68.472 |
编程步骤 16 上升沿 | 67.244 | 67.735 | 68.321 |
DS1045-5阶跃延迟变化与电压的关系
电压(伏特) | 4.75 | 5.00 | 5.25 |
编程步骤 1 下降沿 | 7.817 | 7.681 | 7.574 |
编程步骤 1 上升沿 | 8.213 | 8.005 | 7.815 |
编程步骤 16 下降沿 | 82.506 | 82.961 | 82.395 |
编程步骤 16 上升沿 | 82.958 | 83.363 | 83.720 |
工作电流与频率的关系
我抄送电压和温度:DS10450-3 @ 4.75 V
DS1045-3 @ 4.75 V
频率 | ICC (MA) Temperature | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1兆赫 | 3.41 | 3.22 | 3.02 | 2.88 | 2.75 |
2兆赫 | 4.11 | 3.89 | 3.68 | 3.54 | 3.41 |
10兆赫 | 9.59 | 9.15 | 8.83 | 8.66 | 8.52 |
20兆赫 | 15.83 | 15.18 | 14.86 | 14.75 | 14.69 |
33兆赫 | 23.65 | 23.02 | 22.63 | 22.34 | 22.32 |
DS1045-3 @ 5.00 V
频率 | ICC (MA) Temperature | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1兆赫 | 3.69 | 3.48 | 3.26 | 3.11 | 2.97 |
2兆赫 | 4.45 | 4.20 | 3.98 | 3.82 | 3.68 |
10兆赫 | 10.37 | 9.89 | 9.56 | 9.35 | 9.18 |
20兆赫 | 17.10 | 16.37 | 15.98 | 15.81 | 15.77 |
33兆赫 | 25.41 | 24.63 | 24.34 | 24.07 | 23.81 |
DS1045-3 @ 5.25 V
频率 | ICC (MA) Temperature | ||||
0°C | 25°C | 50°C | 75°C | 100°C | |
1兆赫 | 4.02 | 3.78 | 3.53 | 3.37 | 3.22 |
2兆赫 | 4.83 | 4.55 | 4.30 | 4.13 | 3.98 |
10兆赫 | 11.21 | 10.68 | 10.31 | 10.01 | 9.89 |
20兆赫 | 18.44 | 17.63 | 17.17 | 16.96 | 16.83 |
33兆赫 | 27.26 | 26.29 | 26.03 | 25.80 | 25.53 |
测试注意事项
DS1045为高速器件,因此在测试时应小心谨慎。良好的地面 应使用平面和电源去耦技术。还需要将引脚 2 连接到 V抄送.需要一个精确的时间间隔计数器,其测试分辨率比所需的数据测量高十倍。
测试条件
输入源:最大 50 欧姆,测量电压为 1.5 伏。
输入信号脉冲为 250 ns,周期为 1 ms,
上升和下降时间为 3 ns,介于 0.6 和 3.0 V 之间。
负载电容 = 15 pF。
应用
DS1045双通道可编程延迟线在多个延迟块应用中的应用使其在业界独树一帜。它不仅允许您通过减少库存零件数量来降低库存成本,而且还使设计人员能够在设计周期的后期提高系统性能。延迟块的所有常用应用都适用于该器件,但灵活性要大得多。
谨慎
在加载具有所需延迟函数的二进制值的输入延迟寄存器时,需要注意。为了确保在寄存器加载后保持输入信号的完整性,必须允许输入信号在DS1045中传播至少两倍于所选延迟值。例如,如果使用DS1045-3,并选择二进制8,则在建立输入完整性之前,应至少允许32 ns乘以2或64 ns。
审核编辑:郭婷
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