Measurement-computing E-1608 Manuel d'utilisateur télécharger pdf (Page 20)

Chapter 4

Specifications

All specifications are subject to change without notice.

Typical for 25 °C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Analog input

Table 1. General analog input specifications

Parameter

Condition

Specification

A/D converter type

Successive approximation

ADC resolution

16 bits

Number of channels

4 differential, 8 single-ended

Software-selectable

Input voltage range

±10 V, ±5 V, ±2 V, ±1 V; software-selectable per channel

Absolute max input voltage

CHx relative to AGND

 ±20 V max (power on)

 ±12 V max (power off)

Input impedance

 1 GΩ (power on)

 1200 Ω (power off)

Input bias current

±10 nA

Input bandwidth

All input ranges,

small signal (–3 dB)

700 kHz

Input capacitance

60 pf

Max working voltage (signal

+ common mode)

±10 V range

±10.2 V max relative to AGND

±5 V range

±10.2 V max relative to AGND

±2 V range

±9.5 V max relative to AGND

±1 V range

±9.0 V max relative to AGND

Common mode rejection ratio

= 60 Hz, all input

ranges)

86 dB

Crosstalk

Adjacent differential mode

channels, DC to 10 kHz

–75 dB

Input coupling

Sample rate

0.019 Hz to 250 kHz

Software-selectable

Trigger source

TRIG (see External trigger on page 23)

Sample clock source

Internal A/D clock or external A/D clock (AICKI pin)

Internal sample clock stability

±50 ppm

Internal sample clock

timebase

80 MHz timer with 32-bit period

(available frequencies are 80 MHz / integer period)

Throughput

Software paced

1000 to 5000 S/s typ, on local network (Note 1)

Hardware paced

250 kS/s max

Channel gain queue

Up to 8 elements

Software-selectable channel and range for each queue

element

Warm-up time

15 minutes min

Note 1: This is the typical throughput when the device and host are both connected by Ethernet to the same

local network. The throughput can vary significantly if a wireless connection is involved or data is sent

over the internet and is not guaranteed.

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Measurement-computing E-1608 Manuel d'utilisateur Page 20

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