National Instruments SCXI -1125 用户手册

© National Instruments Corporation

Number of input channels ...................... 8 differential

Input range ............................................. ± 2.5 mVDC to ±5 VDC

Input coupling ........................................ DC (or AC with SCXI-1305 or 

TBX-1329)

Input impedance

Normal powered on ........................ >1 G || 100 pF in parallel

Powered off/overload...................... 4.5 M

With SCXI-1327 ............................. 1 M

With TBX-1316 .............................. 40 M

Input bias current ................................... ±100 pA typical, ±1 nA max

Filter type ............................................... 3-pole Butterworth filter response

Bandwidth (–3dB cut-off frequency)

4 Hz filter ........................................ 4 Hz ±5%

10 kHz filter .................................... 10 kHz ±5%

Full power bandwidth .............. 7 kHz ±5%

With SCXI-1327 or 
SCXI-1313A high-voltage
terminal blocks ........................ 2.6 kHz ±5%

With TBX-1316 high-voltage
terminal block .......................... 500 Hz ±5%

Slew rate

Typical.............................................0.15 V/

μs

Minimum.........................................0.1 V/

μs

Scan interval accuracy

±0.012%..........................................3 

μs

±0.006%.........................................10 

μs

±0.0015%........................................20 

μs

Common Mode Rejection Ratio, 50/60 Hz (CMRR)

4 Hz filter enabled........................... 160 dB

10kHz filter enabled........................ 98 dB