Appendix A
Specifications
DAQCard-1200 User Manual
A-2
ni.com
Maximum working voltage
( common mode) ........................Negative input/AISENSE should
remain within ±6 V (bipolar) or
–6 to 2 V (unipolar) of AGND
Overvoltage protection ...........................±35 V powered on and
±25 V powered off
Inputs protected ......................................ACH<0..7>
FIFO buffer size......................................1,024 samples
Data transfers ..........................................Interrupts, programmed I/O
Dither ......................................................Available
Transfer Characteristics
Relative accuracy....................................±0.5 LSB typ dithered,
±1.5 LSB max undithered
DNL ........................................................±1 LSB max
No missing codes....................................12 bits, guaranteed
Offset error
Pre-gain error after calibration ........10
µ
V max
Pre-gain error before calibration .....±20 mV max
Post-gain error after calibration.......1 mV max
Post-gain error before calibration ....±200 mV max
Gain error (relative to calibration reference)
After calibration...............................0.02% of reading max
Before calibration ............................±2% of reading max
Gain
≠
1 with gain error
adjusted to 0 at gain = 1...................±0.8% of reading max
Amplifier Characteristics
Input impedance
Normal powered on .........................100 G
Ω
in parallel with 50 pF
Powered off .....................................4.7 k min
Overload ..........................................4.7 k min
