Measurement-computing PCI-DAS1602/12 Manuel d'utilisateur télécharger pdf (Page 22)

Chapter 5

Specifications

Typical for 25 °C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Analog input

Table 1. Analog input specifications

A/D converter type

ADS7800

Resolution

12 bits

Number of channels

16 single ended / 8 differential, software selectable

Input ranges

(SW programmable)

Bipolar: ±10 V, ±5 V, ±2.5 V, ±1.25 V

Unipolar: 0 to 10 V, 0 to 5 V, 0 to 2.5 V, 0 to 1.25 V

Polarity

Unipolar/Bipolar, software selectable

A/D pacing

(SW programmable)

Internal counter

External source (A/D External Pacer)

Software polled

Burst mode

Software selectable option, burst rate = 3 µS.

A/D trigger sources

External digital (A/D External Trigger)

External analog (Analog Trigger In)

A/D triggering modes

External digital: Software configurable for:

 edge (triggered)

 level-activated (gated).

Programmable polarity (rising/falling edge trigger, high/low gate).

External analog: Software-configurable for:

 Positive or negative slope.

 Above or below reference

 Positive or negative hysteresis

 In or out of window

Trigger levels set by DAC0 and/or DAC1, 4.88 mV resolution.

Unlimited pre- and post-trigger samples. Total # of samples must be > 512. Compatible

with both digital and analog trigger options.

Data transfer

From 1024 sample FIFO via REPINSW

Programmed I/O

A/D conversion time

3.0 µS max

Throughput

330 kS/s min

Calibration

Auto-calibration, calibration factors for each range stored on board in non-volatile RAM.

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 30 31

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