Measurement-computing USB-202 Bedienungsanleitung PDF herunterladen (Seite 14)

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. General analog input specifications

Parameter

Condition

Specification

A/D converter type

Successive approximation

ADC resolution

12 bits

Number of channels

8 single-ended

Input voltage range

±10 V

Absolute maximum input

voltage

CHx relative to AGND

 ±25 V max (power on)

 ±25 V max (power off)

Input impedance

 1 MΩ (power on)

 1 MΩ (power off)

Input bias current

10 V input

–12 µA

0 V input

2 µA

–10 V input

12 µA

Input bandwidth

Small signal (–3 dB)

150 kHz

Maximum working voltage

Input range relative to AGND

±10.1 V max

Crosstalk

Adjacent channels, DC to

10 kHz

–75 dB

Input coupling

Sampling rate

Internal pacer

0.016 S/s to 100 kS/s, software-selectable

External pacer

100 kS/s max

Sample clock source

 Internal A/D clock

 Pacer input terminal AICKI

Channel queue

Up to eight unique, ascending channels

Throughput

Software paced

33S to 4,000 S/s typ, system dependent

Hardware paced

100 kS/s max, system dependent

Warm-up time

15 minutes min

Accuracy

Analog input DC voltage measurement accuracy

Table 2. DC Accuracy components and specifications; All values are (±)

Range

Gain error

(% of reading)

Offset error

(mV)

Absolute accuracy

at Full Scale

(mV)

Gain temperature

coefficient

(% reading/°C)

Offset

temperature

coefficient

(mV/°C)

±10V

0.098

20.8

0.016

0.87

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