Measurement-computing USB-3110 Uživatelský manuál stáhnout pdf (Strana 21)

USB-3110 User's Guide Specifications

21

Counter

Table 8. CTR I/O specifications

Parameter

Conditions

Specification

Pin name

CTR

Number of channels

1

Resolution

32-bits

Counter type

Event counter

Input type

TTL, rising edge triggered

Counter/timer read/writes rates

(software paced)

Counter read

System dependent, 33 to 1000 reads per second.

Counter write

System dependent, 33 to 1000 reads per second.

Schmidt trigger hysteresis

20 mV to 100 mV

Input leakage current

±1.0 µA typ.

Input frequency

1 MHz max.

High pulse width

500 nS min.

Low pulse width

500 ns min.

Input high voltage

4.0 V min, 5.5 V absolute max

Input low voltage

1.0 V max, –0.5 V absolute min

Memory

Table 9. Memory specifications

EEPROM

256 bytes

EEPROM configuration

Address range

Access

Description

0x000-0x0FF

Read/write

256 bytes user data

Microcontroller

Table 10. Microcontroller specifications

Type

High performance 8-bit RISC microcontroller

Program memory

16,384 words

Data memory

2,048 bytes

Power

Table 11. Power specifications

Parameter

Conditions

Specification

Supply current

USB enumeration

< 100 mA

Supply current (Note 8)

Quiescent current

160 mA typ.

+5V user output voltage range (Note 9)

Available at terminal block pin 56

4.5 V min, 5.25 V max.

+5V user output current (Note 10)

Available at terminal block pin 56

10 mA max.

AC Power Adapter Requirements (Note 11)

Output voltage

5V, ±5%

Output wattage

10 watts

Power jack configuration

Two conductor

Power jack barrel diameter

6.3 mm

Power jack pin diameter

2.0 mm

Power jack polarity

Center positive

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

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