National Instruments NI USB-9234

Phase nonlinearity

(fs = 51.2 kS/s)................................ ±0.45° max

Stopband

Frequency........................................0.55 · fs

Rejection.........................................100 dB

Alias-free bandwidth..............................0.45 · fs

Oversample rate..................................... 64 · fs

Crosstalk (1kHz) ................................... –110 dB

CMRR (fin ≤ 1 kHz)

Minimum........................................ 40 dB

Typical............................................ 47 dB

SFDR (fin = 1 kHz, –60 dBFS) ..............120 dB

Idle channel noise and noise density

Input impedance

Differential......................................305 kΩ

AI– (shield) to chassis ground........ 50 Ω

Total harmonic distortion (THD)

Intermodulation distortion (–1 dBFS)

DIN 250 Hz/8 kHz

4:1 amplitude ratio..........................–80 dB

CCIF 11 kHz/12 kHz

1:1 amplitude ratio..........................–93 dB

Idle Channel 51.2 kS/s 25.6 kS/s 2.048 kS/s

Noise 97 dBFS 99 dBFS 103 dBFS

50 μVrms 40 μVrms 25 μVrms

Noise density 310 nV/√Hz 350 nV/√Hz 780 nV/√Hz

Input

Amplitude

1 kHz,

–40 to 70 °C

8 kHz,

–40 to 70 °C

–1 dBFS –95 dB –87 dB

–20 dBFS –95 dB –80 dB