Appendix A Specifications
PCI-4451/4452 User Manual A-6
©
National Instruments Corporation
Output signal range, software-selectable
FIFO buffer size......................................512 samples
Data transfers..........................................DMA, programmed I/O, Interrupt
Transfer Characteristics
Offset (residual DC)...............................±5 mV max, any gain
Gain (amplitude accuracy)......................±0.1 dB, fout = 1 kHz
Voltage Output Characteristics
Output impedance...................................22 Ω between + and −
DACxOUT, 4.55 kΩ to AOGND
Frequency response................................±0.2 dB, 0 to 23 kHz, 51.2 kS/s
−3 dB bandwidth.....................................0.492 fs
Output coupling......................................DC
Short-circuit protection...........................yes (+ and − may be shorted
together indefinitely)
Outputs protected....................................±DAC0OUT, ±DAC1OUT
Idle channel noise...................................−91 dB fs, DC to 23 kHz
measurement bandwidth
Attenuation
Full-scale Range
Linear Log
10 dB ±10.0 V
10 20 dB ±1.00 V
100 40 dB ±0.100 V
User.book Page 6 Tuesday, April 14, 1998 10:20 AM