© National Instruments Corporation 17 NI USB-9233 User Guide and Specifications
Crosstalk
Paired channels
(0 and 1, 2, and 3) ........................... –100 dB at 1 kHz
Nonpaired channels......................... –110 dB at 1 kHz
Common-mode rejection ratio (CMRR)
Minimum ........................................ 54 dB, f
in
≤ 1 kHz
Typical ............................................ 80 dB, f
in
≤ 1 kHz
Spurious-free dynamic
range (SFDR) ......................................... 120 dB (f
in
= 1 kHz, –60 dB FS)
Idle channel noise and noise density
Input impedance
Differential (AC)............................. >300 kΩ
AI– (shield) to chassis ground ........ 50 Ω
Distortion
Harmonic (THD)
Intermodulation (full-scale input)
DIN 250 Hz/8 kHz
4:1 amplitude ratio................... –80 dB
CCIF 11 kHz/12 kHz
1:1 amplitude ratio................... –93 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
Idle Channel 50 kS/s 25 kS/s 2 kS/s
Noise 95 dB FS 98 dB FS 102 dB FS
Noise density 400 nV/√Hz 400 nV/√Hz 900 nV/√Hz
1 kHz,
–0 to 55 °C
10 kHz,
25 to 55 °C
10 kHz,
–0 to 25 °C
–1 dB FS –90 dB –80 dB
–20 dB FS –95 dB –90 dB –80 dB
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