Chapter 4 Specifications; Analog Input - Measurement Computing USB-2020 User Manual

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

Parameter
A/D converter type
Number of channels
Resolution
Input configuration
Sampling method
Input ranges
Connection type
Input coupling
Absolute maximum input
voltage
Input impedance
Input leakage current
Input bandwidth (3 db)
Crosstalk
Trigger source
Sample clock source
Throughput
Data transfer rate
Signal-to-noise ratio(SNR)
Signal-to-noise and distortion
ratio (SINAD)
Spurious free dynamic range
(SFDR)
Total harmonic distortion
(THD)
Table 1. Analog input specifications
Condition
All input ranges
DC to 10 kHz
Digital
Analog
Internal
External
Software paced
Continuous scan
BURSTIO
From onboard memory
18
Specification
AD9225
2
12-bits
Single-ended, individual A/D per channel
Simultaneous
±10 V, ±5 V, ±2 V, ±1 V, software-selectable
BNC
DC
±15 V max (power on)
1.5 MΩ typ
2 uA typ, 10 uA max
17 MHz typ
–90 dB
TRIG IN (BNC connector and 40-pin connector)
See External trigger for more information
CH0 or CH1
1 kHz to 20 MHz max
CLK IO (BNC connector)
See External clock input/output
33 S/s to 4 kS/s typ; system-dependent
1 kS/s to 8 MS/s, system-dependent
1 kS/s to 20 MS/s to 64 MS onboard memory
10 MS/s typ
66.6 dB
66.5 dB
80 dB
80 dB
Chapter 4
for more information