关于DAC1280的TDATA引脚输入比特流的问题

我想请问下关于DAC1280的TDATA引脚输入的比特流的问题：

1，怎么产生这个比特流，算法是什么？

2，怎么控制输出信号的频率？

对您的回答感激不尽，谢谢。

TDATA is the digital signal input and determines the output frequency and amplitude. TDATA is encoded as a 1s density bitstream where the DAC1280 output is proportional to the 1s density. When the 1s density input is 75% (that is, on average, three out of four TDATA bits are '1'), the differential output current is at a positive maximum value; when the 1s density input is at 25% (on average, three out of four TDATA bits are '0'), the differential output current is at a negative maximum value. When the 1s density is 50% (on average, an equal number of '1's and '0's), the differential output current is 0. See Table 1.

这里说了高电平的密度, 可以看作是 PWM 脉宽的另一个说法

你好~！

我看了这一段，说是可以控制振幅和频率，可是频率怎么控制我没看太懂，能大概解释一下吗？

我打个比方，上面说0输出是50%的高电平密度， 那么假设4个比特位 ，1100和1010还有1001都是50%的高电平密度 难道输出一样吗

谢谢