user manual

USB-9201/9221 User Guide and Specifications 12 ni.com
Stability
Offset drift
USB-9201.................................±100 μV/°C
USB-9221.................................±580 μV/°C
Gain drift .........................................±34 ppm/°C
Input bandwidth (–3 dB)
USB-9201........................................690 kHz min
USB-9221........................................950 kHz min
Input impedance
Resistance ........................................1 MΩ
Capacitance......................................5 pF
Input noise (code-centered)
RMS.................................................0.7 LSB
rms
Peak-to-peak....................................5 LSB
No missing codes....................................12 bits
DNL ........................................................–0.9 to 1.5 LSB
INL..........................................................±1.5 LSB
Crosstalk .................................................–75 dB, 10 kHz
Settling time (to 1 LSB)
USB-9201........................................2 μs
USB-9221........................................1.25 μs
Power Requirements
Power consumption from USB...............500 mA, max
Suspend mode..................................2.5 mA, max
Bus Interface
USB specification ...................................USB 2.0 high speed
Uncalibrated typ (25 °C, ±5°C) ±0.26% ±0.43%
Uncalibrated max (0 to 60 °C) ±0.67% ±1.06%
* Range equals 10.53 V for the USB-9201, 62.50 V for the USB-9221.
Error
Percent of
Reading
Percent of
Range*