Measurement-computing CIO-DAS16Jr/16 Instrukcja Użytkownika Pobierz pdf (Strona 22)

4 SPECIFICATIONS

POWER CONSUMPTION

+5V quiescent 850 mA typical, 1250 mA max

ANALOG INPUT SECTION

A/D converter type AD7805PB

Resolution 16 bits

Number of channels 8 differential or 16 single-ended (switch-selectable)

Input ranges ±10V, ±5V, ±2.5V, ±1.25V, 0 to 10V, 0 to 5V, 0 to 2.5V, 0 to

1.25V, fully programmable

Polarity Unipolar/Bipolar programmable, 11 ms max switching delay

A/D pacing Programmable: internal counter or external source (DIG. IN 0 / TRIGGER,

rising edge) or software polled

A/D Trigger sources External polled gate trigger (DIG. IN 0 / TRIGGER, active high)

A/D Triggering Modes

Digital: Gated pacer, software polled. (Gate must be disabled by software after trigger

event.)

Data transfer DMA, interrupt or software polled

DMA Channels 1 and 3, switch-selectable

DMA enable Programmable

A/D conversion time 10 µs

Throughput 100 kHz typical, PC dependent

Absolute accuracy 0.0023% of reading ±1.5 LSB

Differential Linearity error +1.5/-1 LSB

Integral Linearity error ±1.5 LSB

No missing codes (guaranteed) 16 Bits

Gain drift (A/D specs) ±10 ppm/°C

Zero drift (A/D specs) ±5 ppm/°C

Common Mode Range ±10V

CMRR @ 60 Hz −96 dB

Input leakage current (@ 25 deg C) 200 nA

Input impedance 30 MegΩ

Absolute maximum input voltage ±35V

DIGITAL I/O SECTION

Digital type

Output 74LS197

Input 74LS244

Configuration 4 fixed input, 4 fixed output

Number of channels 8

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 Programmable: levels 2 thru 7

Interrupt enable Programmable

Interrupt sources A/D End-of-conversion, DMA terminal count

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

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