NI USB-9229/9239 User Guide and Specifications 16 ni.com
NI USB-9229...................................0.045°/kHz + 360°· fin/Mclk1
NI USB-9239...................................0.075°/kHz + 360°· fin/Mclk1
Phase nonlinearity (fs = 50 kS/s).............0.11° max
Input delay
NI USB-9229...................................38.4/fs + 2.6 μs
NI USB-9239...................................38.4/fs + 3 μs
Passband
Frequency........................................0.453 · fs
Flatness (fs = 50 kS/s)......................±100 mdB max
Stopband
Frequency........................................0.547 · fs
Rejection..........................................100 dB
Alias-free bandwidth..............................0.453 · fs
–3 dB prefilter bandwidth
(fs = 50 kS/s)...........................................24.56 kHz
CMRR (fin = 60 Hz)
NI USB-9229...................................116 dB
NI USB-9239...................................126 dB
SFDR (1 kHz, –60 dBFS).......................–128 dBFS
Total Harmonic Distortion (THD)
1 kHz, –1 dBFS...............................–99 dB
1 kHz, –20 dBFS.............................–105 dB
Power Requirements
Current consumption from USB.............500 mA, max
Suspend mode..................................2.5 mA, max
Bus Interface
USB specification...................................USB 2.0 Hi-Speed
1 Mclk is the master timebase.