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Analog Data Acquisition

Configure analog input channels and acquire data from your device

You can acquire data from analog input channels either synchronously or asynchronously. For synchronous reads, data is acquired in the foreground. For asynchronous reads, data is acquired in the background. Before you use analog input channels, see Hardware Discovery and Setup.

Functions

`addinput`	Add input channel to device interface (Since R2020a)
`read`	Read data acquired by hardware (Since R2020a)
`readwrite`	Simultaneously read and write device channel data (Since R2020a)
`start`	Start DataAcquisition background operation (Since R2020a)
`stop`	Stop background operation (Since R2020a)
`removechannel`	Remove channel from device interface (Since R2020a)
`flush`	Flush DataAcquisition input and output buffers (Since R2020a)

Apps

Analog Input Recorder

Acquire and visualize analog input signals

Topics

Foreground Data Acquisition

Acquire Data in the Foreground
Acquire data from a device while MATLAB^® waits.
Generate and Measure Signals with Analog Devices ADALM1000
Program a DataAcquisition for ADALM1000 input and output.
Acquire Data and Generate Signals Simultaneously
Acquire and generate data at the same time.
Acquire Data from Multiple Channels
This example shows how to acquire data from multiple channels, and from multiple devices on the same chassis.

Background Data Acquisition

Acquire Data in the Background with Live Plot Updates
Acquire data from a device while MATLAB continues to run.

Measurement Types

Acquire Bridge Measurements
This example shows how to acquire and plot data from an NI USB-9219 device.
Acquire Sound Pressure Data
This example shows how to acquire sound data from an NI 9234.
Acquire IEPE Data
This example shows how to acquire IEPE data using an NI 9234.

App Workflows

Acquire Data with Analog Input Recorder
Use the Analog Input Recorder app to visualize and record analog input signals.

Related Information

Featured Examples

Getting Started with NI Devices

Getting Started with NI Devices

Get started with National Instruments™ devices from the command line.

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Getting Started with MCC Devices

Getting Started with MCC Devices

Get started with MCC devices from the command line.

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Getting Started Acquiring Data with Digilent Analog Discovery

Getting Started Acquiring Data with Digilent Analog Discovery

Acquire voltage data at a rate of 300 kHz. The input waveform is a sine wave (10 Hz, 2 Vpp) provided by an external function generator.

Open Script

Acquire Data Using NI Devices

Acquire Data Using NI Devices

Acquire data from a National Instruments™ device.

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Acquire Data Using NI FieldDAQ Device

Acquire Data Using NI FieldDAQ Device

Acquire data from an NI™ FieldDAQ device.

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Acquire Continuous and Background Data Using NI Devices

Acquire Continuous and Background Data Using NI Devices

Acquire analog input data using non-blocking commands.

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Acquire Data from Multiple Channels Using an MCC Device

Acquire Data from Multiple Channels Using an MCC Device

Acquire data from multiple analog input channels with an MCC device.

Open Script

Acquire Data from an Accelerometer

Acquire Data from an Accelerometer

Acquire and display data from an accelerometer attached to a vehicle driven under uneven road conditions.

Open Script

Measure Strain Using an Analog Bridge Sensor

Measure Strain Using an Analog Bridge Sensor

Acquire bridge circuit voltage ratio data using a CompactDAQ module, then compute and plot strain values.

Open Script

Acquire Temperature Data from a Thermocouple

Acquire Temperature Data from a Thermocouple

Read data from NI™ devices that support thermocouple measurements.

Open Script

Acquire Temperature Data from an RTD

Acquire Temperature Data from an RTD

Acquire temperature data from a Resistive temperature device (RTD) and display the readings.

Open Script

Acquire and Analyze Sound Pressure Data from an IEPE Microphone

Acquire and Analyze Sound Pressure Data from an IEPE Microphone

Acquire and display sound pressure data from a PCB IEPE array microphone, Model 130E20.

Open Script

Acquire and Analyze Noisy Clock Signals

Acquire and Analyze Noisy Clock Signals

Acquire clock signals and analyze transitions, pulses, and compute metrics.

Log Analog Input Data to a File Using NI Devices

Log Analog Input Data to a File Using NI Devices

Save data acquired in the background to a file.

Open Script

Capture Data with Software-Analog Triggering

Capture Data with Software-Analog Triggering

Implement a triggered data capture based on a trigger condition defined in software.

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Create an App for Analog Triggered Data Acquisition

Create an App for Analog Triggered Data Acquisition

Create an analog-triggered data acquisition app by using Data Acquisition Toolbox™ and App Designer.

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Analog Triggered Data Acquisition Using Stateflow Charts

Analog Triggered Data Acquisition Using Stateflow Charts

Create an analog-triggered data acquisition app by using Stateflow®, Data Acquisition Toolbox™, and App Designer.

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Create an App for Live Data Acquisition

Create an App for Live Data Acquisition

Create an app which acquires data from a DAQ device or sound card, displays a live data view, and logs data to a MAT file.

Open App