I'm making a precise, low-current current source for a bio-impedance meter using a howland current pump.
Currently the current pump is driven by a wien-bridge oscillator to produce a 1V p-p 100hz sine wave, my goal is to make it programmable by swapping this for a DDS (AD9852 tentatively). Most commercial DDS ic's are designed for telecom and other high frequency applications and have performance specs available on the MHz level, however information on performance in the low frequency domain is sparse.
SO my question is, how well do commercial DDS IC's perform at frequencies on the order of 100Hz - 1Khz? I'll be sticking an atmega or similiar MCU and will probably drive both the MCU and DDS with a 10MHz clock