Measurement-computing USB-202-OEM Manuel d'utilisateur télécharger pdf (Page 18)

USB-202-OEM User's Guide Specifications

Counter

Table 11. CTR specifications

Parameter Specification

Pin name CTR

Number of channels 1 channel

Resolution 32-bit

Counter type Event counter

Input type Schmitt trigger, 47 kΩ pull-down to ground

Counter read/write rates

(software paced)

33 to 4,000 reads/writes per second typ, system dependent

Schmitt trigger hysteresis 1.01 V typ

0.6 V min

1.5 V max

Input high voltage threshold 2.43 V typ

1.9 V min

3.1 V max

Input low voltage threshold 1.42 V typ

1.0 V min

2.0 V max

Input voltage limits 5.5 V absolute max

–0.5 V absolute min

0 V recommended min

Input frequency 1 MHz max

High pulse width 25 ns min

Low pulse width 25 ns min

Memory

Table 12. Memory specifications

Parameter Specification

Data FIFO 12 K (12,288) analog input samples

Non-volatile memory 2 KB (768 B calibration storage, 256 B UL user data, 1 KB DAQFlex user data)

Power

Table 13. Power specifications

Parameter Condition Specification

Supply current Typical (Note 1) 150 mA

Maximum (including user voltage, DIO and

AICKO loading)

500 mA

User voltage output

terminal (+VO)

4.25 V min, 5.25 V max

User voltage output current 100 mA max

Note 3: This is the total quiescent current requirement for the device which includes up to 10 mA for the Status

LED. This value does not include any potential loading of the digital I/O bits, AICKO, or user voltage.

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Measurement-computing USB-202-OEM Manuel d'utilisateur Page 18

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