DT9817-R datasheet(7/10 Pages) ETC

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DT9810 modules feature a full-scale input signal range of

0 to 2.44 V. If you need a full-scale input signal range of

±10 V, the DT9812, DT9813, DT9814, and DT9816 modules

are available. The DT9816 modules also feature a full-

scale input signal range of ± 5 V.

The DT9812, DT9813, and DT9814 modules provide

programmable gains of 1, 2, 4, and 8; and the DT9816

modules provide gains of 1 and 2.

Throughput

Before selecting a module, consider the pros and cons

of the analog input architecture and what kind of

throughput you need.

Modules with multiplexed inputs, such as the DT9810,

DT9812, DT9813, and DT9814 modules provide only

one A/D converter that is shared by the inputs. A

multiplexer selects or switches the channel to acquire,

which introduces a settling time and phase shift between

channels. In a multiplexed architecture, the total or

aggregate throughput is the maximum rate of the

sample clock. The DT9810 provides an aggregate sample

rate of up 25 kS/s, while the DT9812-10V, DT9813-10V,

and DT9814-10V provide an aggregate sample rate of up

to 50 kS/s, and the DT9812A and DT9813A provide an

aggregate throughput of up to 100 kS/s. The per channel

rate is determined by dividing the maximum sample rate

by the number of inputs sampled. For example, if you are

acquiring 8 inputs on a DT9812-10V, the per channel rate

is 6.25 kS/s.

In contrast, modules that provide separate A/D

converters per channel, such as the DT9816, DT9816-A,

and DT9816-S, eliminate the phase shift between signals,

allowing you to correlate simultaneous measurements of

multiple inputs. The per channel sample rate, in this case,

is the maximum rate of the sample clock (50 kS/s for the

DT9816, 150 kS/s for the DT9816-A, and 750 kS/s for the

DT9816-S). The aggregate total throughput is the number

of channels times the per channel throughput.

Input Triggers

A trigger is an event that occurs based on a specified set

of conditions. Acquisition starts when the module detects

the initial trigger event and stops when the buffers

on the queue have been filled or when you stop the

operation.

Effective Input Range

Module

Gain

Bipolar Input Range

DT9812-10V

DT9812A

DT9813-10V

DT9813A

DT9814-10V

±10 V

±5 V

±2.5 V

±1.25 V

DT9816

DT9816-A

DT9816-S

±10 V

±5 V

The DT9812, DT9813, DT9814, and DT9816 Series modules

support the following trigger sources:

• Software trigger

• External digital (TTL) trigger

Analog Outputs

DT9812, DT9813, and DT9814 Series modules provide two

12-bit analog output channels (DACs). The modules can

output data from a single analog output channel or from

both analog output channels.

The DT9812-10V, DT9812-10V-OEM, DT9812A,

DT9813-10V, DT9813A and DT9814-10V modules provide

a fixed output range of ±10 V.

Output Trigger

A trigger is an event that occurs based on a specified set

of conditions. The DT9812, DT9813, and DT9814 Series

modules support a software trigger for starting analog

output operations. Using a software trigger, the module

starts outputting data when it receives a software

command.

Waveform Generation

Generate sine, rectangle, triangle, or DC waveforms from

one or both analog output channels. You can select the

frequency, amplitude, duty, and offset cycle of the signal.

For the DT9812-10V, DT9812-10V-OEM, DT9813-10V,

DT9814-10V, the output frequency ranges between 30 Hz

and 50 kHz. For the DT9812A and DT9813A, the output

frequency ranges between 30 Hz and 75 kHz.

Digital I/O Lines

The DT9812 Series modules provide 8 dedicated digital

input lines and 8 dedicated digital output lines. The

DT9813 Series modules provide 4 dedicated digital input

lines and 4 dedicated digital output lines. The DT9814

Series modules do not support digital I/O operations. The

DT9812-10V, DT9816, DT9816-A, and DT9816-S modules

feature 8 digital input lines and 8 digital output lines. The

DT9813-10V provides 4 digital input lines, and 4 digital

output lines.

The DT9810 module provides 20 programmable digital

I/O lines. If you need more digital I/O lines and do not

need analog I/O functionality, select the DT9817-H

module, which provides 28 programmable digital I/O

lines. The DT9810 can source 4.5 mA and sink 10 mA. The

DT9817-H provides high-drive capability, and can source

15 mA and sink 64 mA.

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