Measurement Computing USB-2020 - Manual (Page 18)

Chapter 4
Specifications
All specifications are subject to change without notice.
Typical at 25 °C unless otherwise specified
Specifications in italic text are guaranteed by design.
Analog input
Table 1. Analog input specifications
Parameter Condition Specification
A/D converter type AD9225
Number of channels 2
Resolution 12-bits
Input configuration Single-ended, individual A/D per channel
Sampling method Simultaneous
Input ranges ±10 V, ±5 V, ±2 V, ±1 V, software-selectable
Connection type BNC
Input coupling DC
Absolute maximum input
voltage
±15 V max (power on)
Input impedance 1.5 MΩ typ
Input leakage current 2 uA typ, 10 uA max
Input bandwidth (3 db) All input ranges 17 MHz typ
Crosstalk DC to 10 kHz –90 dB
Trigger source Digital TRIG IN (BNC connector and 40-pin connector)
See External trigger for more information
Analog CH0 or CH1
Sample clock source Internal 1 kHz to 20 MHz max
External CLK IO (BNC connector)
See External clock input/output for more information
Throughput Software paced 33 S/s to 4 kS/s typ; system-dependent
Continuous scan 1 kS/s to 8 MS/s, system-dependent
BURSTIO 1 kS/s to 20 MS/s to 64 MS onboard memory
Data transfer rate From onboard memory 10 MS/s typ
Signal-to-noise ratio(SNR) 66.6 dB
Signal-to-noise and distortion
ratio (SINAD)
66.5 dB
Spurious free dynamic range
(SFDR)
80 dB
Total harmonic distortion
(THD)
80 dB
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