Measurement-computing USB-231 Bedienungsanleitung PDF herunterladen (Seite 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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