Measurement-computing PCI-DAS1602/12 Instrukcja Użytkownika Pobierz pdf (Strona 24)

PCI-DAS1602/12 User's Guide Specifications

Noise performance

Table 5 summarizes the noise performance for the PCI-DAS1602/12. Noise distribution is determined by

gathering 50 K samples @ 330 kHz with inputs tied to ground at the user connector.

Table 5. Noise performance specifications

Range

% within ±2 counts

% within ±1 count

MaxCounts

LSBrms*

±10 V

100%

0.45

±5 V

100%

0.45

±2.5 V

100%

0.45

±1.25 V

100%

0.76

0 to +10 V

100%

0.45

0 to +5 V

100%

0.45

0 to +2.5 V

100%

0.45

0 to +1.25 V

100%

0.76

* RMS noise is defined as the peak-to-peak bin spread divided by 6.6.

Analog output

Table 6. Analog output specifications

A/D converter type

AD7945BR multiplying type

Resolution

12-bits

Number of channels

Voltage ranges

±10 V, ±5 V, 0 to 5 V, 0 to 10 V. Each independently programmable

Monotonicity

Guaranteed monotonic over temperature

Overall analog output drift

 ±0.02 LSB/°C

Slew rate

 ±10 V Range: 15 V/µs

 ±5 V Range: 10 V/µs

 0 to 10 V Range: 7.5V/µs

 0 to 5 V Range: 5 V/µs

Settling time

20 V step to 0.012%: 4 µs max

Current drive

±5 mA

Output short-circuit duration

Indefinite @ 25 mA

Output coupling

Output impedance

0.1 ohms

Power up and reset

DACs cleared to 0 volts ±200 mV max

Accuracy

Table 7. Absolute accuracy specifications

Range

Absolute Accuracy

±10 V

±3.0 LSB

±5 V

±3.0 LSB

0 V to +10 V

±3.0 LSB

0 V to +5 V

±3.0 LSB

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 30 31

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