Measurement-computing PCI-DAS1602/16 Manuel d'utilisateur télécharger pdf (Page 26)

PCI-DAS1602/16 User's Guide Specifications

Counter

*Note: Pins 21, 24, and 25 are pulled to logic high via 10K resistors.

Table 11. Counter specifications

Counter type

82C54

Configuration

Two 82C54 chips containing three 16-bit down counters each

82C54A:

Counter 0 — ADC residual sample

counter.

Source: ADC Clock.

Gate: Programmable source.

Output: End-of-Acquisition interrupt.

Counter 1 — ADC pacer lower

divider

Source: 10 MHz oscillator

Gate: Tied to Counter 2 gate, programmable source.

Output: Chained to Counter 2 Clock.

Counter 2 — ADC pacer upper

divider

Source: Counter 1 Output.

Gate: Tied to Counter 1 gate, programmable source.

Output: ADC Pacer clock (if software selected), available at user

connector.

82C54B:

Counter 0 — pretrigger mode

Source: ADC Clock.

Gate: External trigger

Output: End-of-Acquisition interrupt.

Counter 0 — non-pretrigger mode:

user counter 4

Source: User input at 100pin connector or internal 10MHz (software

selectable)

Gate: User input at 100pin connector.

Output: Available at 100pin connector.

Counter 1 — DAC pacer lower

divider

Source: 10 MHz oscillator

Gate: Tied to Counter 2 gate, programmable source.

Output: Chained to Counter 2 Clock.

Counter 2 — DAC pacer upper

divider

Source: Counter 1 Output.

Gate: Tied to Counter 1 gate, programmable source.

Output: DAC Pacer clock, available at user connector.

Clock input frequency

10 MHz max

High pulse width (clock input)

30 ns min

Low pulse width (clock input)

50 ns min

Gate width high

50 ns min

Gate width low

50 ns min

Input high

2.0 volts min, 5.5 volts absolute max

Input low

0.8 volts max, -0.5 volts absolute min

Output high

3.0 volts min @ -2.5 mA

Output low

0.4 volts max @ 2.5 mA

Crystal oscillator frequency

10 MHz

Frequency accuracy

50 ppm

Power consumption

Table 12. Power consumption specifications

+5 V operating (A/D converting to FIFO)

2 A typical, 2.1 A max

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

Commentaires sur ces manuels

Pas de commentaire

Measurement-computing PCI-DAS1602/16 Manuel d'utilisateur Page 26

Commentaires sur ces manuels

Produits connexes et manuels pour Matériel Measurement-computing PCI-DAS1602/16