Measurement-computing USB-231 Manual do Utilizador Página 22

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22
Chapter 4
Specifications
All specifications are subject to change without notice.
Typical for 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 Successive approximation
ADC resolution 16 bits
Sampling rate Maximum aggregate 50 kS/s
Number of channels 8 single-ended or 4 differential; software-selectable
Input voltage range ±10 V
Working voltage ±10 V
Overvoltage protection
Power on ±30 V max
Power off ±20 V max
Input impedance
>1 GΩ
Input bias current
±200 pA, typ
INL ±1.8 LSB
DNL 16 bits no missing codes
CMRR 56 dB (DC to 5 kHz)
Input bandwidth 300 kHz
Trigger sources Software, TRIG
Absolute accuracy (analog input DC voltage measurement accuracy)
Table 2. Absolute accuracy (no load)
Range
At full scale (typical at 25 °C) At full scale (maximum over temperature)
System noise
±10 V 6 mV 26 mV 0.4 mVrms
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