Measurement-computing PCI-DAS6402/16 Bedienungsanleitung PDF herunterladen (Seite 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 AD976A, successive approximation ADC

Resolution 16 bits

Number of channels 64 single ended; 32 differential

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

Internal counter – ASIC

External source (A/D external pacer)

A/D pacing (SW

programmable)

Software polled

Burst mode Software selectable option, burst rate = 5 µS. Valid for a fixed input range only.

External digital (A/D Pacer Gate) A/D gate sources

External analog (Analog Trigger In)

External digital: Programmable, active high or active low, level, or edge A/D gating modes

External analog: Software-configurable for:

! Above or below reference

! Positive or negative hysteresis

! In or out of window

Trigger levels set by D/A OUT 0 and/or D/A OUT 1.

External digital (A/D start trigger in and A/D stop trigger in) A/D trigger sources

External analog (analog trigger in)

External digital: Software-configurable for rising or falling edge.

External analog: Software-configurable for positive or negative slope.

Trigger levels set by D/A OUT 0 and/or D/A OUT 1.

A/D triggering modes

Pre-/post-trigger: Unlimited number of pre-trigger samples, 16 Meg post-trigger samples.

Compatible with both digital and analog trigger options.

From 8k RAM buffer via DMA (demand or non-demand mode) using scatter gather. Data transfer

Programmed I/O

Configuration memory 8K words

Channel/gain queue Up to 8K elements. Programmable channel, gain, and offset.

A/D conversion time 5 µS

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

5-1

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