Measurement-computing CIO-DAS08/JR Manuel d'utilisateur télécharger pdf (Page 13)

Chapter 3

Specifications

Typical for 25°C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Analog input

Table 1. Analog input specifications

Parameter

Specification

A/D converter type

AD574

Resolution

12 bits

Number of channels

8 single-ended

Input ranges

±5 V

A/D pacing

Software polled

Data transfer

Software polled

A/D conversion time

25 µs

Throughput

System dependant

Gain drift (A/D specs)

±50 ppm/°C

Zero drift (A/D specs)

±10 ppm/°C

Absolute maximum input voltage

±30 V continuous

Noise Distribution (Rate = N/A, Average % +/- 2 bins, Average % +/- 1 bin, Average # bins)

Bipolar (5 V)

100% / 100% / 3 bins

Digital input/output

Table 2. Digital I/O specifications

Digital type

Output 74LS273

Input 74LS244

Configuration

8 fixed input, 8 fixed output

Number of channels

Output high

2.7 volts min @ -0.4 mA

Output low

0.5 volts max @ 8 mA

Input high

2.0 volts min, 7 volts absolute max

Input low

0.8 volts max, -0.5 volts absolute min

Power consumption

Table 3. Power consumption specifications

+5V

200 mA typical, 240 A max

+12V

17 mA typical, 22 mA max

-12V

28 mA typical, 36 mA max

1 2 ... 8 9 10 11 12 13 14 15 16

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