e2v新出了12bit, 4.5Gsps的DAC EV12DS400A,

12-bit DAC (EV12DS400A) provides high levels of spectral purity from 0 to 7GHz 

This ground breaking DAC provides an analog bandwidth extending beyond 7GHz facilitating multi-band, direct digital synthesis in the L, C and S-bands. Furthermore 30ps rise/fall times also makes this part ideal in time domain applications. A flexible 4:1 or 2:1 input multiplexer enables sampling rates up to 4.5 GSPS. 

Four output coding modes (NRZ, RTZ, NRTZ and RF) offer design flexibility and helps simplify frequency planning. This unique part can deliver spectral power up to and beyond the fourth Nyquist zone (see charts below). The DAC achieves > 50dB NPR and high spectral purity with an SFDR of 65dBc@2240MHz. 

The EV12DS400 offers features to simplify design-in for many sophisticated RF systems.

12bit DAC(EV12DS400A)提供从0到7GHz的高等级的纯净的频谱。

这个开创性的DAC提供超过7GHz的模拟带宽，方便用户在L, C和S波段跨多个频段进行直接数字合成。另外，30ps的上升/下降时间也使得这个器件非常适合用在时域的应用上。灵活的4:1或2:1的输入多路复用器使其采样率高达4.5Gsps。

4种输出编码模式(NRZ, RTZ, NRTZ和RF)为用户提供设计的灵活性，帮助简化频率方案设计。这个独一无二的器件可以传递频谱能量超过第4奈奎斯特区间。这个DAC能达到超过50dB的NPR，和在2240MHz时65dBc SFDR的高纯净频谱。

EV12DS400的特性可以简化众多复杂的RF系统的设计。