The AD9957 is a 1GSPS Quadrature Digital Upconverter with 1-Bit I/Q Data Path and 14-bit DAC
1GSPS internal clock speed (up to 400MHz analogue output)
Integrated 1GSPS 14-bit DAC
250MHz I/Q data throughput rate
Phase Noise with less than or equal to ?125dBc/Hz (400MHz carrier @ 1kHz offset)
Excellent dynamic performance >80dB narrow-band SFDR
8 programmable profiles for shift keying