Post Go back to editing

AD9832

Thread Summary

The user is looking to use the AD9832 as a local oscillator in a 50Ω system but finds the output current insufficient to drive 50Ω mixers requiring >1.4V. The recommended solution is to add an output buffer to achieve the necessary drive level. The AD7008, with a 40mA output current, was a better fit but was obsoleted due to low customer demand. IQ modulation is suggested as a more effective alternative.
AI Generated Content

I am looking to use the AD9832 as a local oscillator in a 50R system. It seems to me that the output current is too low to use with 50R mixers requiring > 1.4 V drive. This drivers the need for additional gain / driver stages which may introduce phase errors / distortion into a good signal chain. Has anyone addressed this problem ? It seems that the old AD7008 with a 40mA output current was a perfect solution and I wonder why it was obsoleted ?