Measurement-computing PCI-DAS1200 Manual de usuario descargar pdf (Pagina 18)

PCI-DAS1200 User's Guide Specifications

Analog output

Table 2. Analog output specifications

Parameter

Specification

D/A type

AD7847AR

Resolution

12 bits

Number of channels

Output ranges

±10 V, ±5 V, 0 to 5 V, 0 to 10 V

Each channel independently programmable.

D/A pacing

Software

Data transfer

Programmed I/O

Offset error

±600 µV max, all ranges (calibrated)

Gain error

±0.02% FSR max (calibrated)

Differential nonlinearity

±1 LSB max

Integral nonlinearity

±1 LSB max

Monotonicity

12 bits

D/A gain drift

±2 ppm/°C max

D/A bipolar offset drift

±5 ppm/°C max

D/A unipolar offset drift

±5 ppm/°C max

Throughput

PC dependent

Settling time (to .01% of 10 V step)

4 µs typ

Slew rate

7 V/µS

Current drive

±5 mA min

Output short-circuit duration

25 mA indefinite

Output coupling

Amp output impedance

0.1 Ohms max

Miscellaneous

Power up and reset, all DAC's cleared to 0 volts, ±200 mV

Digital input/output

Table 3. DIO specifications

Parameter

Specification

Digital type

82C55A

Configuration

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

Number of I/O

24 (FIRSTPORTA 0 through FIRSTPORTC 7)

Output high

3.0 volts @ -2.5 mA min

Output low

0.4 volts @ 2.5 mA max

Input high

2.0 volts min, Vcc+0.5 volts absolute max

Input low

0.8 volts max, GND-0.5 volts absolute min

Power-up / reset state

Input mode (high impedance)

Interrupts

INTA# - mapped to IRQn via PCI BIOS at boot-time

Interrupt enable

Programmable

Interrupt sources

Residual counter, End-of-channel-scan, AD-FIFO-not-empty,

AD-FIFO-half-full

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 24

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