Measurement-computing CIO-DAS1401/12 Bedienungsanleitung PDF herunterladen (Seite 16)

Chapter 4

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

ADS7805 successive approximation

Resolution

12 bits (1 in 4096)

Programmable ranges

±10 V, ±1 V, ±0.1 V, ±0.01 V, 0 to 10 V, 0 to 1 V, 0 to 0.1 V, 0 to 0.01 V

A/D pacing

Programmable: external source (DIN0, positive edge), internal pacer

(positive or negative edge, jumper selectable) or software polled

Burst mode

4 µs

Data transfer

From 512 sample FIFO via interrupt, DMA or software polled

Polarity

Unipolar/Bipolar, switch selectable

Number of channels

8 differential or 16 single-ended, switch selectable

DMA

Channel 1 or 3

Trigger sources

External polled gate trigger (DIN0)

A/D conversion time

3.3 µs

Throughput

160 kS/s

Differential linearity error

±1 LSB

Integral linearity error

±1.5 LSB

No missing codes guaranteed

12 bits

Gain drift (A/D specs)

±30 ppm/°C

Zero drift (A/D specs)

±10 ppm/°C

Input leakage current

250 nA max

Input impedance

10 Meg Ohms min

Absolute maximum input voltage

±35 V

Digital input/output

Table 2. Digital I/O specifications

Digital type

Output: 74LS197

Input: 74LS244

Configuration

4 fixed input, 4 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

Interrupts

2-7

Interrupt enable

Programmable

Interrupt sources

End-of-conversion, DMA terminal count

1 2 ... 11 12 13 14 15 16 17 18 19

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