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NI USB-9229/9239 User Guide and Specifications 16 ni.com
NI USB-9229...................................0.045°/kHz + 360°· f
in
/M
clk
1
NI USB-9239...................................0.075°/kHz + 360°· f
in
/M
clk
1
Phase nonlinearity (f
s
= 50 kS/s).............0.11° max
Input delay
NI USB-9229...................................38.4/f
s
+ 2.6 μs
NI USB-9239...................................38.4/f
s
+ 3 μs
Passband
Frequency........................................0.453 · f
s
Flatness (f
s
= 50 kS/s)......................±100 mdB max
Stopband
Frequency........................................0.547 · f
s
Rejection..........................................100 dB
Alias-free bandwidth ..............................0.453 · f
s
–3 dB prefilter bandwidth
(f
s
= 50 kS/s) ...........................................24.56 kHz
CMRR (f
in
= 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
M
clk
is the master timebase.