Measurement-computing CIO-DAS16/M1/16 Manual do Utilizador descarregar pdf (Página 21)

7 SPECIFICATIONS

Analog input section

A/D converter type Datel ADS-30356 Subranging

Resolution 16 bits

Programmable ranges ±5V, ±2.5V, ±1.25V, ±.625V, 0 to 10V, 0 to 5V, 0 to 2.5V, 0 to 1.25V

A/D pacing Programmable: internal counter or external source (Din0, rising edge) or

software polled

Burst mode intersample time 1 µs

Data transfer Word wide from 1k sample FIFO via REP INSW, interrupt, DT Connect

or software polled

Polarity Unipolar/Bipolar software selectable, 10 ms delay switching

Number of channels 8 differential

A/D Trigger sources External trigger/gate (DIN1)

A/D Triggering Modes

Digital: Software configurable for edge (triggered) or level-activated (gated).

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

A/D conversion time 1 µs

Throughput 1 MHz max

Differential Linearity error ±1 LSB max

Integral Linearity error ±6 LSB max

Offset Error ±10 LSB max

Common Mode Range +11V, −6V

CMRR (60Hz, Vin = CMR) 90dB

No missing codes guaranteed 16 bits

Gain drift (A/D specs) ±30 ppm/°C, all ranges

Input leakage current (@25 Deg C) < 200 nA

Input impedance Min 10 MegOhms

Absolute maximum input voltage ±15V

Digital Input / Output

Digital Type (Main Connector)

Input: 74LS244

Output: 74LS197

Configuration Two dedicated ports, 4 input and 4 output

Output High 2.7 volts @−0.4mA min

Output Low 0.4 volts @ 8 mA min

Input High 2.0 volts min, 7 volts absolute max

Input Low 0.8 volts max, −0.5 volts absolute min

Digital Type (Auxiliary Connector) 82C55

Configuration 2 banks of 8, 2 banks of 4, programmable by bank as input or output

Output High 3.0 volts min @ − 2.5mA

Output Low 0.4 volts max @ 2.5mA

Offset error can be trimmed to zero by adjusting the offset potentiometer for zero offset at the sampling

frequency to be used.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26

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